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Siemens 7SK80 Manual

Siprotec motor protection.
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SIPROTEC
Motor Protection
7SK80
V4.7
Manual
E50417-G1140-C344-A5
Preface
Contents
Appendix
1
2
3
4
A

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   Summary of Contents for Siemens 7SK80

  • Page 1 Preface Contents Introduction SIPROTEC Functions Motor Protection Mounting and Commissioning 7SK80 Technical Data V4.7 Appendix Literature Manual Glossary Index E50417-G1140-C344-A5...
  • Page 2 SIPROTEC, SINAUT, SICAM and DIGSI are registered trademarks Document version V04.10.01 of Siemens AG. Other designations in this manual might be trade- marks whose use by third parties for their own purposes would in- Release date 11.2012 fringe the rights of the owner.
  • Page 3: Functions

    Applicability of this Manual This manual is valid for: SIPROTEC 4 Multifunctional Protection Device with Motor Protection 7SK80; Firmware Version V4.7 Indication of Conformity...
  • Page 4: Technical Data

    Additional Support Should further information on the System SIPROTEC 4 be desired or should particular problems arise which are not covered sufficiently for the purchaser's purpose, the matter should be referred to the local Siemens rep- resentative. Our Customer Support Center provides a 24-hour service.
  • Page 5 Operational equipment with exposed current transformer circuits may not be operated. The limit values as specified in this manual or in the operating instructions may not be exceeded. This aspect must also be observed during testing and commissioning. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 6 (example of a value indication) External binary output signal with number (device indication) used as input signal Example of a parameter switch designated FUNCTION with address 1234 and the possible settings ON and OFF SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 7 Static memory (SR flipflop) with setting input (S), resetting input (R), output (Q) and inverted output (Q), setting input dominant Static memory (RS-flipflop) with resetting input (R) setting input (S), output (Q) and inverted output (Q), resetting input dominant ■ SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 8 Preface SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 9: Table Of Contents

    Information List ............. .58 SIPROTEC, 7SK80, Manual...
  • Page 10: Table Of Contents

    Information List ............. . . 127 SIPROTEC, 7SK80, Manual...
  • Page 11: Table Of Contents

    Information List..............206 SIPROTEC, 7SK80, Manual...
  • Page 12: Table Of Contents

    Setting Notes ..............259 SIPROTEC, 7SK80, Manual...
  • Page 13: Table Of Contents

    Description ..............297 SIPROTEC, 7SK80, Manual...
  • Page 14: Table Of Contents

    Final Preparation of the Device............348 SIPROTEC, 7SK80, Manual...
  • Page 15: Table Of Contents

    Accessories ..............421 SIPROTEC, 7SK80, Manual...
  • Page 16: Table Of Contents

    A.2.1 7SK80 — Housing for panel flush mounting and cubicle installation and for panel surface mounting Connection Examples ............. 429 A.3.1...
  • Page 17: Introduction

    Introduction This chapter introduces the SIPROTEC 4 7SK80 and gives an overview of the device's application, properties and functions. Overall Operation Application Scope Characteristics SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 18: Overall Operation

    1.1 Overall Operation Overall Operation The digital SIPROTEC 7SK80 motor protection is equipped with a powerful microprocessor. It allows all tasks to be processed digitally, from the acquisition of measured quantities to sending commands to circuit breakers. Figure 1-1 shows the basic structure of the 7SK80.
  • Page 19 In addition to the device communication via DIGSI, port B can also be used to transmit all device data to a central evaluator or a control center. This interface may be provided with various protocols and physical trans- mission schemes to suit the particular application. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 20 (substation battery) becomes short-circuited. Usually, they are bridged by a capacitor (see also Technical Data). A buffer battery is located under the flap at the lower end of the front cover. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 21: Application Scope

    1.2 Application Scope Application Scope The digital motor protection SIPROTEC 4 7SK80 is suitable as protection and monitoring unit for asynchronous machines of any size. It can nevertheless also be used in busbar feeders or as line protection in networks with grounded, low-resistance grounded, isolated or compensated star point structure.
  • Page 22 Alternatively, additional connection options are available with PROFIBUS DP and the DNP3.0 and MODBUS protocols. If an EN100 module is available, you can use the protocols IEC61850, PROFINET or DNP3 TCP. Furthermore, connecting a SICAM I/O unit is possible via IEC651850 GOOSE. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 23: Characteristics

    • For inverse-time overcurrent protection, selection from various characteristics of different standards possi- • Blocking is possible, e.g. for reverse interlocking with any Element • Instantaneous tripping by any Element is possible when switching onto a fault • In-rush restraint with second harmonic current quantities. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 24 • Approximate computation of the rotor overtemperature • Startup is permitted only if the rotor has sufficient thermal reserves for a complete startup • Disabling of the start inhibit is possible if an emergency startup is required. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 25 • A sector characteristic can be set as directional characteristic • Any Element can be set as directional or non-directional — forward sensing directional, or reverse sensing directional • Optionally applicable as additional ground fault protection. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 26 • Several independent subfunctions have been implemented (ΣI procedure, ΣI procedure, 2P procedure and t procedure) • Acquisition and conditioning of measured values for all subfunctions operates phase-selective using one procedure-specific threshold per subfunction. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 27 B (e.g. of SICAM or LSA), or via the user interface (using a personal computer and the DIGSI operating software) • Feedback of switching states via the switch auxiliary contacts • Plausibility monitoring of the circuit breaker position and check of interlocking conditions. ■ SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 28 Introduction 1.3 Characteristics SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 29 Functions This chapter describes the numerous functions available on the SIPROTEC 4 device 7SK80. It shows the setting possibilities for each function in maximum configuration. Information with regard to the determination of setting values as well as formulas, if required, are also provided.
  • Page 30: General

    Functions configured as Disabled are not processed by the 7SK80. There are no indications, and the corre- sponding settings (functions, limit values) are not relevant during configuration.
  • Page 31 Int.Temp.Meas.. The Appendix provides some implementation examples in the section „Connection Exam- ples“). The settings in address have to comply with those at the RTD box (see Section 2.17.2, side title „RTD box Settings“). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 32: Settings

    (sensitive) Ground fault Definite Time User Defined PU INTERM.EF Disabled Disabled Intermittent earth fault protection with Ignd with 3I0 with Ignd,sens. Dir. Interm. EF Disabled Disabled Dir. Intermittent earth fault protec- Enabled tion SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 33 Enabled RTD CONNECTION 6 RTD simplex 6 RTD HDX Ext. Temperature Input Connec- 6 RTD HDX tion Type 12 RTD HDX 6 RTD Eth 12 RTD Eth Int.Temp.Meas. Cap. Volt.Meas. Capacitive voltage measurement SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 34: Device, General Settings

    This information is then not issued if during a system disturbance one or more protection functions have picked up but the 7SK80 did not trip because the fault was cleared by another device (e.g. on another line). These messages are then limited to faults in the line to be protected.
  • Page 35: Setting Notes

    (of the month), day of the week, hour of switching to daylight saving time address 676 S2W month through 679 S2W hour month, week (of the month), day of the week, hour of switching to winter time SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 36 -1440 .. 1440 min 60 min Offset for daylight in minutes W2S month 1 .. 12 month of time set winter to summer W2S week 1 .. 5 week of time set winter to summer SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 37: Information List

    Device OK Device is Operational and Protecting ProtActive IntSP At Least 1 Protection Funct. is Active Reset Device Reset Device Initial Start Initial Start of Device Resume Resume Clock SyncError Clock Synchronization Error SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 38 Time from Pickup to drop out TRIP Time Time from Pickup to TRIP 10080 Error Ext I/O Error Extension I/O 10081 Error Ethernet Error Ethernet 10082 Error Terminal Error Current Terminal 10083 Error Basic I/O Error Basic I/O SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 39: Power System Data 1

    This setting determines the measuring direction of the device (forward = line direction). Changing this parameter also results in a polarity reversal of the ground current inputs I or I SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 40 The standard connection is A, B, C, (Gnd). It may only be changed if the device is set to measure one or more ground currents via two current inputs. The standard connection has to be used in all other cases. The following picture illustrates such a special connection. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 41 The sensitive ground current at the fourth current input is referred to INS. The setting must be selected according to the system requirements. The following table gives an overview of how the protection functions are assigned to the ground current inputs for the special connection. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 42 The selection of the voltage transformer connection affects the operation of all device functions that require voltage input. The settings Vab, Vbc or Vab, Vbc, Vx do not allow determining the zero voltage. The associated protec- tion functions are inactive in this case. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 43 These capacitances are primarily determined by the type and length of the connection line. The voltage inputs of the device feature an input capacitance of 2.2nF and an ohmic component of 2.0 MΩ. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 44 2000 pF to 10,000 pF in incre- ments of 500 pF. Since the input capacitance of 2200 pF can have a tolerance of ±20 %, values higher than 1800 pF are recommended here. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 45 The setting of parameter 203 Vnom SECONDARY should be roughly equivalent to the voltage at the terminals of the protection device at primary nominal voltage. If capacitive voltage measurement is selected, a setting range of 34 V to 140 V is sufficient for this parameter. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 46 Parameter 235 ATEX100 enables meeting the requirements for protecting explosion-protected motors for thermal replicas. Set this parameter to YES to save all thermal replicas of the 7SK80 devices in the event of a power supply failure. After the supply voltage is restored, the thermal replicas will resume operation using the stored values.
  • Page 47 With voltage connection type Van, Vbn, Vcn, this parameter is used only to calculate the operational measured value of the „second- ary voltage V “. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 48 If the device features a sensitive ground current input (measuring range starts at 1 mA), the ground fault protection always uses the calculated variable 3I0. In this case, parameter 613 Gnd O/Cprot. w. is not available. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 49 Thresh. BI 176V Thresh. BI 176V Threshold for Binary Input Thresh. BI 88V Thresh. BI 19V Threshold BI 2 Thresh. BI 176V Thresh. BI 176V Threshold for Binary Input Thresh. BI 88V Thresh. BI 19V SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 50 Phase LPCT orientation / reversed polarity Ir-52 10 .. 50000 A 125 A Rated Normal Current (52 Breaker) OP.CYCLES AT Ir 100 .. 1000000 10000 Switching Cycles at Rated Normal Current SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 51 3.25 V rated secondary voltage LPVT 332A V-LPVT PHA -10.00 .. 10.00 ° 0.00 ° phase angle LPVT 613A Gnd O/Cprot. w. Ignd (measured) Ignd (measured) Ground Overcurrent pro- 3I0 (calcul.) tection with SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 52 Malparameteriz. Volt.-divider Capacities 2.1.4 Oscillographic Fault Records The Multifunctional Protection with Control 7SK80 is equipped with a fault record memory. The instantaneous values of the measured values and v (voltages depending on connection) are sampled at intervals of 1.0 ms (at 50 Hz) and stored in a revolving buffer (20 samples per cycle).
  • Page 53 If the binary input time is set to ∞, the length of the record equals the time that the binary input is activated (static), but not longer than the MAX. LENGTH (address 403). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 54 A setting group includes the setting values for all functions that have been selected as Enabled during con- figuration (see Section 2.1.1.2). In 7SK80 relays, four independent setting groups (A to D) are available. While setting values may vary, the selected functions of each setting group remain the same.
  • Page 55 Setting Group B is active P-GrpC act IntSP Setting Group C is active P-GrpD act IntSP Setting Group D is active >Set Group Bit0 >Setting Group Select Bit 0 >Set Group Bit1 >Setting Group Select Bit 1 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 56: Power System Data 2

    P,Q sign to reversed. If the setting is not reversed (default), the positive direction for the power etc. corresponds to the "forward" direction for the protection functions. Section 4 provides a detailed list of the values in question. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 57 >52 Breaker Wear Start Criteria 16020 52 WearSet.fail 52 Wear blocked by Time Setting Failure 16027 52WL.blk I PErr 52 Breaker Wear Logic blk Ir-CB>=Isc-CB 16028 52WL.blk n PErr 52 Breaker W.Log.blk SwCyc.Isc>=SwCyc.Ir SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 58: En100-module

    EN100-Module 2.1.7.1 Description The EN100-Module enables integration of the 7SK80 in 100-Mbit communication networks in control and au- tomation systems with the protocols according to IEC 61850 standard. This standard permits uniform commu- nication of the devices without gateways and protocol converters. Even when installed in heterogeneous envi- ronments, SIPROTEC 4 relays therefore provide for open and interoperable operation.
  • Page 59: Overcurrent Protection 50, 51, 50n, 51n

    Tripping by the 50-1 and 51 elements (in phases), 50N-1 and 51N elements (in ground path) may be blocked for inrush conditions by utilizing the inrush restraint feature. The following table gives an overview of the interconnections to other functions of the devices 7SK80. Table 2-2...
  • Page 60: Definite Time High-set Elements 50-3, 50-2, 50n-3, 50n-2

    The following figures show the logic diagrams for the 50-2 and 50N-2 high-set elements as an example. They also apply analogously to the high-set elements 50-3 and 50N-3. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 61 If parameter 1213 MANUAL CLOSE is set to 50-2 instant. or 50-3 instant. and manual close detection is used, a pickup causes instantaneous tripping even if the Element is blocked via a binary input. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 62 If parameter 1313 MANUAL CLOSE is set to 50N-2 instant. or 50N-3 instant. and manual close de- tection is used, a pickup causes instantaneous tripping even if the Element is blocked via a binary input. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 63: Definite Time Overcurrent Elements 50-1, 50n-1

    The pickup values of each 50-1 Element for phase currents and 50N-1 Element for the ground current and the element-specific time delays can be set individually. The following figures show the logic diagrams for the current elements 50-1 and 50N-1. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 64 The dropout delay only operates if no inrush was detected. An incoming inrush will reset a running dropout delay time. Figure 2-9 Logic diagram of the dropout delay for 50-1 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 65 The dropout delay only functions if no inrush was detected. An incoming inrush will reset a running dropout time delay. Figure 2-11 Logic of the dropout delay for 50N-1 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 66: Inverse Time Overcurrent Elements 51, 51n

    Pickup values of elements 51 (phase currents) and 51N (ground current) and the relevant time multiplicators may be set individually. The following two figures show the logic diagrams for the inverse time overcurrent protection. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 67 If an ANSI Curve is configured, parameter 1209 51 TIME DIAL is used instead of parameter 1208 51 TIME DIAL. If parameter 1213 MANUAL CLOSE is set to 51 instant. and manual close detection is used, a pickup causes instantaneous tripping even if the Element is blocked via a binary input. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 68 90 % of the setting value, the incrementing and the decrementing processes are in idle state. Disk emulation offers advantages when the overcurrent relay elements must be coordinated with conventional electromechanical overcurrent relays located towards the source. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 69: Inverse Time Overcurrent Protection 51v (voltage-controlled / Voltage-restraint)

    ("Fuse Failure Monitor"). The following two figures show the logic diagrams for the inverse time overcurrent protection with undervoltage consideration. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 70 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-15 Logic diagram of the voltage-controlled inverse time overcurrent protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 71 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-16 Logic diagram of the voltage-restraint inverse-time overcurrent protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 72: Dynamic Cold Load Pickup Function

    The 7SK80 features an integrated inrush restraint function. It prevents the „normal“ pickup of 50-1 or 51 relay elements (not 50-2 and 50-3) in the phases and the ground path of all directional and non-directional overcur- rent relay elements.
  • Page 73 The inrush restraint has an upper limit: Above this (via adjustable parameter 2205 I Max) current blocking is suppressed since a high-current fault is assumed in this case. The following figure shows the inrush restraint influence on the time overcurrent elements including cross- blocking. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 74 Functions 2.2 Overcurrent Protection 50, 51, 50N, 51N Figure 2-17 Logic diagram for inrush restraint SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 75: Pickup Logic And Tripping Logic

    „51 picked up“ 1820 51 C PU 2-12 51N PU 2-13 „51N picked up“ 1837 (All pickups) „50(N)/51(N) PU“ 1761 In the trip signals, the Element which initiated the tripping is also indicated. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 76: Two-phase Overcurrent Protection (only Non-directional)

    Time elements T 50-1 or T51 are still effective as backup element. Pickup signals output by the load-side protective relay are used as input message„>BLOCK 50-2“ via a binary input at the feeder-side protective relay. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 77 Depending on the setting of parameter 251 CT Connect., the device can also be used in specific system configuration with regard to current connections. Further information can be found under Section 2.1.3.2, „Cur- rent Connections“. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 78 Three-Phase High Voltage Side Fault Current at 110 kV = 5250 A Three-Phase Low Voltage Side Fault Current at 20 kV = 3928 A On the High Voltage Side Flowing at 110 kV = 714 A SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 79 If the 50N-2 Element or 50N-3 Element is not required at all, the pickup threshold 50N-2 or 50N- 3 should be set to ∞. This setting prevents tripping and the generation of a pickup message. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 80 If the relay is used to protect transformers or motors with large inrush currents, the inrush restraint feature of 7SK80 may be used for the 50N–1 relay element. It can be enabled or disabled for both the phase current and the ground current in address 2201 INRUSH REST..
  • Page 81 Definite Time during configuration of the protection functions (see Section 2.1.1). Inrush Restraint When applying the protection device to transformers where high inrush currents are to be expected, the 7SK80 can make use of an inrush restraint function for the overcurrent elements 50-1, 51, 50N-1 and 51N.
  • Page 82 External Control Command If the manual close signal is not sent from 7SK80 device, i.e. neither via the built-in operator interface nor via a serial interface, but directly from a control acknowledgment switch, this signal must be passed to a 7SK80 binary input, and configured accordingly („>Manual Close“), so that the Element selected for MANUAL...
  • Page 83 2.50 A 0.00 .. 60.00 sec; ∞ 1303 50N-2 DELAY 0.10 sec 50N-2 Time Delay 0.05 .. 35.00 A; ∞ 1304 50N-1 PICKUP 0.20 A 50N-1 Pickup 0.25 .. 175.00 A; ∞ 1.00 A SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 84 2204 CROSS BLK TIMER 0.00 .. 180.00 sec 0.00 sec Cross Block Time 2205 I Max 0.30 .. 25.00 A 7.50 A Maximum Current for Inrush Restraint 1.50 .. 125.00 A 37.50 A SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 85 50N-2 Time Out 1833 50N-2 TRIP 50N-2 TRIP 1834 50N-1 picked up 50N-1 picked up 1835 50N-1 TimeOut 50N-1 Time Out 1836 50N-1 TRIP 50N-1 TRIP 1837 51N picked up 51N picked up SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 86 Phase A InRush picked up 7566 Ib InRush PU Phase B InRush picked up 7567 Ic InRush PU Phase C InRush picked up 10034 50-3 BLOCKED 50-3 BLOCKED 10035 50N-3 BLOCKED 50N-3 BLOCKED SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 87: Directional Overcurrent Protection Ground 67, 67n

    Applications • The directional ground overcurrent protection also allows the 7SK80 multifunctional protection devices to be used in systems where selectivity depends on both the magnitude of the fault current and the direction of power flow to the fault location.
  • Page 88: Directional Definite Time High-current Elements 67n-2, 67n-3

    The element can work directionally or non-directionally. The following figure shows the logic diagram for the high current element 67N-2 of the ground currents. The high-current element 67N-3 is structured identically. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 89 Logic diagram of the directional element 67N-2 If parameter 1613 is set to 67N-2 instant. or 67N-3 instant. and manual close detection is present, a pickup causes instantaneous tripping even if the element is blocked via binary input. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 90: Definite Time, Directional Overcurrent Element 67n-1

    The element can work directionally or non-directionally. The following figure shows the logic diagram for the directional overcurrent element 67N-1 of the ground cur- rents. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 91 The dropout delay only functions if no inrush was detected. An incoming inrush will reset an already running dropout time delay. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 92: Inverse Time, Directional Overcurrent Element 67n-toc

    Disk emulation offers advantages when the overcurrent relay elements must be coordinated with conventional electromechanical overcurrent relays located towards the source. The following figure shows the logic diagram of the 67N-TOC overcurrent element of the directional inverse- time overcurrent protection. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 93: Interaction With Fuse Failure Monitor (ffm)

    (ground), see logic diagrams. In such a case, the undervoltage protection and the sensitive ground fault detection will also be blocked. For additional information on the operation of the fuse failure monitor, see section 2.10.1 Measured Value Su- pervision. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 94: Dynamic Cold Load Pickup

    2.3.7 Inrush Restraint 7SK80 features an integrated inrush restraint function. It prevents the "normal" pickup of the 67N-1 or 67N-TOC elements (not 67N-2 and 67N-3) in the ground path of the non-directional and directional overcurrent protec- tion. The same is true for the alternative pickup thresholds of the dynamic cold load pickup function. If inrush currents are detected, special inrush pickup signals are generated.
  • Page 95 The forward area is equally a range of ±86° around the rotated reference voltage V If the vector of the fault ref,rot current -3I (or I ) is in this area, the device detects forward direction. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 96 IN or the quantities 3I0 calculated from the three phase currents. Devices featuring a sensitive ground current input generally use the calculated quantity 3I0. The directional orientation of the function is influenced by parameter 201 CT Starpoint (see Chapter 2.1.3). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 97 If the 67N-1 Element picks up, the phase-specific directional indications „forward“ or „reverse“ are issued (mes- sage 2635 or 2636). Pickup of the 67N-2 Element or 67N-3Element lies within the parameterized directional range without direction- al indication. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 98 If the relay is used to protect transformers or motors with large inrush currents, the inrush restraint feature of 7SK80 may be used for the 67N-1 PICKUP element (for more information see margin heading "Inrush Re- straint").
  • Page 99 External control command If the manual closing signal is not generated by the 7SK80, that is, it is sent neither via the built-in operator interface nor via the serial port but directly from a control acknowledgment switch, this signal must be passed to a 7SK80 binary input, and configured accordingly („>Manual Close“) so that the Element selected for...
  • Page 100 0.50 .. 15.00 ; ∞ 1609 67N-TOC T-DIAL 5.00 67N-TOC Time Dial 1610 67N-TOC DropOut Instantaneous Disk Emulation Drop-Out Characteristic Disk Emulation 1611 67N-TOC IEC Normal Inverse Normal Inverse IEC Curve Very Inverse Extremely Inv. Long Inverse SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 101 0.50 .. 35.00 A; ∞ ∞ A 1628 67N-3 PICKUP 67N-3 Pickup 0.00 .. 60.00 sec; ∞ 1629 67N-3 DELAY 0.00 sec 67N-3 Time Delay 1632A 67N-3 active always always 67N-3 active with 79 active SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 102 2696 67/67N TRIP 67/67N TRIP 2697 67-3 picked up 67-3 picked up 2698 67N-3 picked up 67N-3 picked up 2699 67-3 Time Out 67-3 Time Out 2700 67N-3 Time Out 67N-3 Time Out SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 103 Only then the parameters are set back to "normal". When the dynamic setting values are activated via binary input „>ACTIVATE CLP“ and this cause drops out, the "normal" settings are restored immediately even if a pickup is present. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 104 During power up of the protective relay with an open circuit breaker, the time delay CB Open Time is started, and is processed using the "normal" settings. Therefore, when the circuit breaker is closed, the "normal" set- tings are effective. Figure 2-27 Timing charts of the dynamic cold load pickup function SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 105 Functions 2.4 Dynamic Cold Load Pickup Figure 2-28 Logic diagram of the dynamic cold load pickup function (50c, 50Nc, 51c, 51Nc, 67c, 67Nc) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 106 2103 67Nc-1 PICKUP and 2104 67Nc-1 DELAY for the 67-1 element and 2105 67Nc-TOC PICKUP together with 2106 67Nc-TOC T-DIAL (for IEC curves) or 2107 67Nc-TOC T-DIAL (for ANSI curves) for the 67-TOC element. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 107 50Nc-3 Time Delay 1.00 .. 35.00 A; ∞ ∞ A 2008 67c-3 PICKUP 67c-3 Pickup 5.00 .. 175.00 A; ∞ ∞ A 0.00 .. 60.00 sec; ∞ 2009 67c-3 DELAY 0.00 sec 67c-3 Time Delay SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 108 >BLOCK Cold-Load-Pickup stop timer 1732 >ACTIVATE CLP >ACTIVATE Cold-Load-Pickup 1994 CLP OFF Cold-Load-Pickup switched OFF 1995 CLP BLOCKED Cold-Load-Pickup is BLOCKED 1996 CLP running Cold-Load-Pickup is RUNNING 1997 Dyn set. ACTIVE Dynamic settings are ACTIVE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 109: Voltage Protection 27, 59

    Vph-n (smallest phase-to-Ground voltage) Phase-to-Ground voltage V1 (positive sequence voltage) Positive sequence voltage · √3 Vab, Vbc, VGnd Vphph (smallest phase-to-phase voltage) Phase-to-phase voltage Vab, Vbc V1 (positive sequence voltage) Positive sequence Vab, Vbc, Vx voltage · √3 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 110 Moreover you have the option of setting a flag via device op- eration for blocking the voltage protection. This initiates the reset of the pickup and device configuration can be resumed. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 111: Overvoltage Protection 59

    The dropout ratio for the two overvoltage elements (= V ) can be set. dropout value pickup value The following figure shows the logic diagram of the overvoltage protection function. Figure 2-29 Logic diagram of the overvoltage protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 112: Undervoltage Protection 27

    Pickup of the protection function is also reset by the action of the AND-combination of voltage and current. As a consequence, energization is admitted anew when the minimum command time elapsed. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 113 It is important to understand, however, that if a low voltage condition exists on the load after the circuit breaker is closed (unlike Figure 2-31), the desired pickup of the element will be delayed by 60 ms. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 114 Functions 2.5 Voltage Protection 27, 59 The following figure shows the logic diagram of the undervoltage protection function. Figure 2-32 Logic diagram of the undervoltage protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 115 In order to obtain a pickup threshold of the time overcurrent protection that is as sensitive as possible, its stabilization via the voltage protection is necessary to avoid false tripping. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 116 Element is set at address 5102 or 5103, 27-1 PICKUP, while the time delay is set at address 5106, 27-1 DELAY (a somewhat longer time delay). Setting these elements in this way allows the undervoltage pro- tection function to closely follow the stability behavior of the system. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 117 This causes the dropout of the pickup and parameterization can be resumed. Please note that the pickup threshold BkrClosed I MIN (address 212) also affects the overload protection, the load jam protection, the cold load pickup function and the CB maintenance. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 118 27-2 DELAY 0.50 sec 27-2 Time Delay 5113A 27-1 DOUT RATIO 1.01 .. 3.00 1.20 27-1 Dropout Ratio 5114A 27-2 DOUT RATIO 1.01 .. 3.00 1.20 27-2 Dropout Ratio 5120A CURRENT SUPERV. Current Supervision SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 119 59-Overvoltage protection is ACTIVE 6568 59-1 picked up 59-1 Overvoltage V> picked up 6570 59-1 TRIP 59-1 Overvoltage V> TRIP 6571 59-2 picked up 59-2 Overvoltage V>> picked up 6573 59-2 TRIP 59-2 Overvoltage V>> TRIP SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 120: Negative Sequence Protection 46

    46-2 PICKUP is started, another message is output and time element 46-2 DELAY is initiated. Once either time delay elapses, a trip signal is initiated. Figure 2-33 Definite time characteristic for negative sequence protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 121: Inverse Time Characteristic 46-toc

    Dropout for IEC Curves The Element drops out when the negative sequence current decreases to approx. 95% of the pickup setting. The time delay resets immediately to be ready for another pickup operation. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 122 When leaving the operating range of the unbalanced load protection (all phase currents below 0.05 x I at least one phase current is greater than 10 x I ), all unbalanced load elements that have picked up will drop out. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 123 The configured dropout times do not influence the tripping times of the inverse time elements as these depend dynamically on the measured current value. For purposes of dropout coordination, disc emulation is used with electro-mechanical relays. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 124 The delay time 46-2 DELAY must be coordinated with the system grading of phase-to-phase faults. If power supply with current I is provided via just two phases, the following applies to the inverse current: SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 125 This corresponds to 36% and 20% of the transformer nominal current respectively. It is important to note that load current is not taken into account in this simplified example. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 126 The time multiplier can also be set to ∞. After pickup the Element will then not trip. Pickup, however, will be signaled. If the inverse time Element is not required at all, address 140 46 should be set to Definite Time during the configuration of protection functions (Section 2.1.1.2). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 127 46-2 picked up 46-2 picked up 5165 46-1 picked up 46-1 picked up 5166 46-TOC pickedup 46-TOC picked up 5170 46 TRIP 46 TRIP 5171 46 Dsk pickedup 46 Disk emulation picked up SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 128: Motor Protection (motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection)

    Inhibit 66, Load Jam Protection) For the protection of motors, the 7SK80 can be provided with a motor starting protection feature, a restart inhibit and a load jam protection function. The starting protection function protects the motor from prolonged startup procedures thus supplementing the overload protection (see Section 2.9).
  • Page 129 A pickup does not create messages in the trip log buffer. Fault recording is not started until a trip command has been issued. When the function drops out, all timers are reset. The annunciations disap- pear and a trip log is terminated should it have been created. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 130 ) motor startups. By means of the following formula an approximate limit cold warm value can be determined. (Parameter 4106 TEMP.COLD MOTOR) The setting value should always be lower than the limit value (see Setting Notes 2.7.1.2). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 131 If no other influencing factors are present (peak loads), the value for motor startup I MOTOR START set at address 1107 may be an average value: Based on the Long-Term Current Rating: SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 132 Should the technical data of the motor make reference to four cold and two warm startups (n = 4; n = 2), cold warm the following limit value can be determined: The setting value should fall below the limit value. A value of 40% is recommended for that purpose. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 133: Motor Restart Inhibit 66

    Therefore, the 7SK80 features the motor restart inhibit which outputs a blocking command until a new motor startup is permitted for the deactivated motor (restarting limit). The blocking signal must be configured to a binary output relay of the device whose contact is inserted in the motor starting circuit.
  • Page 134 Figure 2-38 shows, as an example, the heating processes during repeated motor starts (three starts from cold operating condition), as well as the thermal replica in the protection relay. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 135 Regardless of thermal replicas, some motor manufacturers require a minimum inhibit time after the maximum number of permissible startup attempts has been exceeded. The total duration of the inhibit signal depends on which of the times T or T is longer. Min Inhibit Restart SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 136 In the latter case, when power supply is restored, the thermal replica uses the stored value for calculation and matches it to the operating conditions. The first option is the default setting. For further details, see /5/. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 137 Logic There is no pickup annunciation for the restart inhibit and no trip log is produced. The following figure shows the logic diagram for the restart inhibit. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 138 Functions 2.7 Motor Protection (Motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection) Figure 2-39 Logic diagram for the restart inhibit SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 139 212 BkrClosed I MIN. With Kτ at RUNNING = 1 the heating and the cooling time constant are the same at operating conditions (I > BkrClosed I MIN). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 140 (address 212 BkrClosed I MIN, recommended setting ≈ 0.1 I ) have been MOT.NOM set correctly. An overview of parameters and their default settings is generally given in the setting tables. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 141 The equilibrium time is reset, the thermal replica is released and „66 TRIP“ is reported as going (see Figure 2-40, to the right). Figure 2-40 Startups according to examples A.1 and A.2 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 142 TRIP“ is reported. Although the temperature soon falls below the restarting limit, the blocking „66 TRIP“ is preserved until the equilibrium time and the minimum inhibit time have expired (see Figure 2-41, to the right). Figure 2-41 Starting up according to examples B.1 and B.2 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 143: Load Jam Protection

    Figure 2-43 illustrates an example of a locked rotor caused by mechanical overload. It should be noted that the current flow increases substantially as soon as the mechanical load reaches the stability limit. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 144 The motor is detected as being in standstill when none of the three phase currents exceeds the threshold set via address 212 BkrClosed I MIN and the binary signal „>52-a“ is inactive. The „>52-a“ signal is only taken into account if the binary input is allocated accordingly. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 145 Alarm is naturally set below the tripping element, to approx. 75% of the tripping element, with a longer delay time (parameter 4405 ALARM DELAY). If the warning element is not required, the pickup value can be set to its maximum value and the respective message from the buffers can be removed. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 146 • Motor starting protection: protects the motor against prolonged startup procedures and the consequent thermal overload of the rotor • Overcurrent and high-current elements: for motor shutdown due to electrical faults Figure 2-45 Example of a complete motor protection characteristic SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 147 The tripping delay time can remain at the default setting of 2 s. In order to block the function during motor startup, the parameter 4406 T Start Blk. is set to double startup time (T Start Blk. = 2 · 8.5 s = 17 s). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 148: Motor (motor Starting Protection 48, Motor Restart Inhibit 66, Load Jam Protection)

    Kτ at RUNNING 0.2 .. 100.0 Extension of Time Con- stant at Running 4310 T MIN. INHIBIT 0.2 .. 120.0 min 6.0 min Minimum Restart Inhibit Time 4311 ROTOR OVERLOAD Rotor Overload Protection Alarm Only SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 149 Load Jam ACTIVE Load Jam Protection is ACTIVE 10024 Load Jam alarm Load Jam Protection alarm 10025 Load Jam pickup Load Jam Protection picked up 10026 Load Jam TRIP Load Jam Protection TRIP SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 150: Frequency Protection 81 O/u

    When a frequency element drops out, the tripping command is immediately terminated, but not before the minimum command duration has elapsed. Each of the four frequency elements can be blocked individually via binary inputs. The following figure shows the logic diagram for the frequency protection function. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 151 OFF, if the element is not required. Minimum voltage The minimum voltage below which the frequency protecion is blocked is entered in address 5402 Vmin. The threshold values is set as phase-to-phase quantity. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 152 81-1 PICKUP 50.00 .. 70.00 Hz 59.50 Hz 81-1 Pickup 0.00 .. 100.00 sec; ∞ 5405 81-1 DELAY 60.00 sec 81-1 Time Delay 5406 81-2 PICKUP 40.00 .. 60.00 Hz 49.00 Hz 81-2 Pickup SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 153 81-3 picked up 81-3 picked up 5235 81-4 picked up 81-4 picked up 5236 81-1 TRIP 81-1 TRIP 5237 81-2 TRIP 81-2 TRIP 5238 81-3 TRIP 81-3 TRIP 5239 81-4 TRIP 81-4 TRIP SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 154: Thermal Overload Protection 49

    The protection function therefore represents a thermal replica of the equipment to be protected (overload pro- tection with memory capability). Both the previous history of an overload and the heat loss to the environment are taken into account. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 155 When running down or at standstill, a motor without external cooling looses heat more slowly, and a longer thermal time constant must be used for calculation. For a motor that is switched off, the 7SK80 increases the time constant τ by a programmable factor (kτ factor). The motor is considered to be off when the motor currents drop below a programmable minimum current setting BkrClosed I MIN (refer to "Current Flow Monitoring"...
  • Page 156 In the latter case, when power supply is restored, the thermal replica uses the stored value for calculation and matches it to the operating conditions. The first option is the default setting. For further details, see /5/. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 157 Functions 2.9 Thermal Overload Protection 49 Figure 2-47 Logic diagram of the overload protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 158 (limited) overload ca- pacity. The 7SK80 devices feature an overload protection function with thermal tripping characteristic adaptable to the overload capability of the equipment being protected (overload protection with memory function).
  • Page 159 1-second current, and the result is multiplied by the given duration. For example, if the 0.5-second current rating is known: It is important to note, however, that the longer the effective duration, the less accurate the result. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 160 The dropout time to be entered at address 4208 T EMERGENCY must ensure that after an emergency startup and after dropout of the binary input „>EmergencyStart“ the trip command is blocked until the thermal replica is below the dropout threshold again. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 161 Nominal device current in A Fault current through phase in A Prefault current Θ (address 4209 49 TEMP. RISE I) Temperature at nominal current I Θ Coolant temperature input (scaling with address 4209 or 4210) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 162 49 TEMP. RISE I 40 .. 200 °C 100 °C 49 Temperature rise at rated sec. curr. 4210 49 TEMP. RISE I 104 .. 392 °F 212 °F 49 Temperature rise at rated sec. curr. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 163 49 Winding O/L 49 Winding Overload 1521 49 Th O/L TRIP 49 Thermal Overload TRIP 1580 >RES 49 Image >49 Reset of Thermal Overload Image 1581 49 Image res. 49 Thermal Overload Image reset SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 164: Monitoring Functions

    If a malfunction occurs, the processor system is restarted. Sampling Sampling and synchronism between the internal buffer components are monitored constantly. If any occurring deviations cannot be removed by renewed synchronization, the processor system is restarted. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 165 • The settings CT PRIMARY (address 204) and Ignd-CT PRIM (address 217) must be the same. • The settings CT SECONDARY (address 205) and Ignd-CT SEC (address 218) must be the same. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 166 The digitized sampled values are being monitored in respect of their plausibility. If the result is not plausible, message 181 „Error A/D-conv.“ is issued. The protection is blocked, thus preventing unwanted operation. Furthermore, a fault record is generated for recording of the internal fault. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 167: Software Monitoring

    (address 8104) is the lower limit of the operating range of this monitoring (see Figure 2-50). Both parameters can be set. The dropout ratio is about 97 %. This failure is thus located below the curve for all values and is reported as „Fail I balance“. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 168 (see Figure 2-51). Both parameters can be set. The dropout ratio is about 97%. This failure is thus located below the curve for all values and is reported as „Fail V balance“. Figure 2-51 Voltage symmetry monitoring SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 169: Measuring Voltage Failure Detection

    Van, Vbn, Vcn or Vab, Vbc, VGnd was set. Of course, the miniature circuit breaker and FFM can also be used for the detection of a measuring voltage failure at the same time. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 170 The generation of the internal signal „Alarm FFM“ for the mode of operation in an isolated system is illustrated in Figure 2-53. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 171 Figure 2-53. The following is a description of the principles for single-, two- and three-pole faults in a secondary voltage transformer system. If this part of the FFM logic picks up, the internal signal „Alarm FFM“ is generated, the further processing of which is indicated in Figure 2-52. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 172 This enables a clear distinction from asymmetries impressed by the power system. If the negative sequence system is related to the current positive sequence system, the following rules apply to the Fault-free Case: SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 173: Broken Wire Monitoring Of Voltage Transformer Circuits

    If only two phase-to-phase voltages were measured, it would not be possible to evaluate two of the required criteria. Task The broken wire function monitors the voltage transformer circuits of the secondary system with regard to fail- ure. A distinction is made between single-pole, two-pole and three-pole failures. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 174 The broken wire monitoring is also active during a fault. The function may be enabled or disabled. The following logic diagram shows how the broken wire monitoring functions. Figure 2-54 Logic diagram of broken wire monitoring SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 175 5307 I> BLOCK. The threshold value should be identical with the definite time overcurrent protection. Under address 5310 BLOCK PROT. it can be determined whether the protection functions should be blocked upon pickup by the FFM. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 176 BAL. FACTOR V 0.58 .. 0.90 0.75 Balance Factor for Voltage Monitor 8104 BALANCE I LIMIT 0.10 .. 1.00 A 0.50 A Current Threshold for Balance Monitoring 0.50 .. 5.00 A 2.50 A SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 177 VT b.w. 2 pole Failure VT circuit: 2 pole broken wire VT b.w. 3 pole Failure VT circuit: 3 pole broken wire 6509 >FAIL:FEEDER VT >Failure: Feeder VT 6510 >FAIL: BUS VT >Failure: Busbar VT SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 178: Trip Circuit Supervision 74tc

    Trip Circuit Supervision 74TC The 7SK80 is equipped with an integrated trip circuit supervision. Depending on the number of available binary inputs (not connected to a common potential), supervision with one or two binary inputs can be selected. If the allocation of the required binary inputs does not match the selected supervision type, a message to this effect is generated („74TC ProgFail“).
  • Page 179 After the malfunction in the trip circuit is cleared, the fault annunciation is reset automatically after the same time period. Figure 2-56 Logic diagram of the trip circuit supervision with two binary inputs SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 180 Logic diagram of trip circuit supervision with one binary input The following figure shows the logic diagram for the message that can be generated by the trip circuit monitor, depending on the control settings and binary inputs. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 181 Through appropriate sizing of the resistor and depending on the system condi- tions, a lower control voltage is mostly sufficient. Information for dimensioning resistor R is given in the Chapter "Installation and Commissioning" under Config- uration Notes in the Section "Trip Circuit Supervision". SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 182 "ERROR" LED lights up on the front cover and the green "RUN" LED goes out. If the internal auxiliary voltage also fails, all LEDs are dark. Table 2-9 shows a summary of the monitoring functions and the malfunc- tion responses of the device. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 183 Annunciation „Alarm NO calibr“ As allocated (hardware) (193) After three unsuccessful restart attempts, the device is shut down. DOK = "Device okay" = readiness relay drops out, protection and control functions are blocked. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 184 Appendix A.10. In this context it must be noted that the annunciation 160 „Alarm Sum Event“ is only issued when the measured value monitoring functions (8101 MEASURE. SUPERV) are activated. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 185: Ground Fault Protection 64, 67n(s), 50n(s), 51n(s)

    2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Depending on the variant, the fourth current input of the multi-functional protection relay 7SK80 is equipped either with a sensitive input transformer or a standard transformer for 1/5 A. In the first case, the protective function is designed for ground fault detection in isolated or compensated systems due to its high sensitivity.
  • Page 186 In case of capacitive voltage measurement, the current elements operate non-directional only since an exact angle measurement is not ensured when using the voltage V The pickup of the definite time overcurrent protection can be stabilized by the configured dropout delay time (address 3121 50Ns T DROP-OUT). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 187 –45°, or in case of electric machines connected to the busbar of an ungrounded power system in the resis- tive-capacitive range with a rotation of +45° (see the following Figure). Furthermore the directional limit lines may be rotated by 90° to determine ground faults and their direction in isolated systems. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 188 If PHI CORRECTION is unequal 0°, the angle of the directional limit lines is calculated by adding up active and reactive power components. The forward and reverse zone can be reduced at its boundaries at address 3160 α1 red.dir.area and address 3161 α2 red.dir.area (see Figure 2-61). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 189 Parameter PU CRITERIA specifies, whether a fault is generated by means of the AND-function or the OR- combination of displacement voltage and pickup of the ground current. The former may be advantageous if the pickup setting of displacement voltage element V was chosen to be very low. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 190 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Figure 2-64 Logic diagram of the V > element for cos-ϕ /sin-ϕ measurement SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 191 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) elements during cos ϕ/sin ϕ measurement Figure 2-65 Logic diagram of the I SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 192: Ground Fault Detection For V0/i0-ϕ Measurement

    If the voltage magnitude for any given phase falls below the set threshold VPH MIN, that phase is detected as the grounded phase as long as the remaining phase-to- Ground voltages exceed the set threshold VPH MAX. Figure 2-66 Determination of Ground-faulted Phase SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 193 These settable threshold values must be exceeded in order to be picked up. Negative angle settings turn the tripping area in the „inductive“ direction, i.e. ground current inductive compared to ground voltage. Figure 2-67 Tripping range of V0/I0-ϕ characteristic SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 194 All elements can be blocked individually via binary inputs. In this case pickup and, if possible, direction and grounded phase will still be reported, however, tripping does not take place since the time elements are blocked. Figure 2-68 Activation of the sensitive ground fault detection for V0/I0-ϕ measurement SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 195 Functions 2.11 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) Logic diagram during V0/I0 ϕ measurement, part 1 Figure 2-69 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 196: Ground Fault Location

    "reverse" direction is sent back or no measurement is carried out in case ground current is too low. Definitely the faulty line can be determined clearly. Figure 2-71 Location of ground faults in a radial network SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 197 The setting depends on the dropout time delay of the electro-magnetic relay. If no coordination is required, the preset value (zero = no dropout time delay) remains. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 198 Current flows greater than the highest current value entered will not result in a reduced tripping time. The pickup curve (see Figure 2-73) continues, from the largest current point parallel to the current axis. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 199 3109 64-1 VGND, where a more sensitive setting can be made than with a calculated displacement voltage. Please note that with displaced voltage V -voltage, the factor (in normal case = 1.73; see also Section 2.1.3.2) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 200 64-1 DELAY. It is important to note that the total tripping time consists of the displacement voltage measure- ment time (about 50 ms) plus the pickup time delay (address 3111 T-DELAY Pickup) plus the tripping time delay (address 3112 64-1 DELAY). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 201 RELEASE DIRECT. (3I0 DIR.), MEAS. METHOD = SIN ϕ the reactive (capacitive) component of the ground current with respect to the displacement voltage is most relevant for the current value RELEASE DIRECT. (3I0 DIR.) (Figure 2-74). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 202 The forward and reverse zone can be reduced at its boundaries at address 3160 α1 red.dir.area and address 3161 α2 red.dir.area (see Figure 2-74). Siemens recommends using the default setting of 2° (this corresponds to the behavior of versions without this setting option). In a grounded system in feeders with very high capacitive current, it can be reasonable to set a slightly larger angle α1 to prevent erroneous pickup...
  • Page 203 3124 and 3125. COS ϕ is the method of measurement used, and the correction angle is set to –45°, since the ground fault current is typically resistive-inductive (right section SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 204 Phase Vph Max 1.8 .. 200.0 V; ∞ 3109 64-1 VGND 40.0 V 64-1 Ground Displace- ment Voltage 10.0 .. 225.0 V; ∞ 3110 64-1 VGND 70.0 V 64-1 Ground Displace- ment Voltage SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 205 0.4 .. 50.0 V 2.0 V 50Ns-2 minimum voltage 3150 50Ns-2 Vmin 10.0 .. 90.0 V 10.0 V 50Ns-2 minimum voltage 3151 50Ns-2 Phi -180.0 .. 180.0 ° -90.0 ° 50Ns-2 angle phi SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 206 SensGnd Reverse Sensitive Gnd fault in reverse direction 1278 SensGnd undef. Sensitive Gnd fault direction undefined 16029 51Ns BLK PaErr Sens.gnd.flt. 51Ns BLOCKED Setting Error ϕ(3Vo,INs) = 16030 Angle between 3Vo and INsens. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 207: Intermittent Ground Fault Protection

    But such intermittent ground faults already bear the risk of causing thermal damage to equipment. This is why devices 7SK80 feature a protective function that is able to detect such intermittent ground faults and accumu- lates their duration. If the sum reaches a configurable value within a certain time, the limit of the thermal load capacity has been reached.
  • Page 208 Logic Diagram The following figure shows the logic diagram for the intermittent ground fault protection function. Figure 2-75 Logic diagram of the intermittent ground fault protection – principle SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 209 „Ia InRush PU“ Phase A inrush picked up 7566 „Ib InRush PU“ Phase B inrush picked up 7567 „Ic InRush PU“ Phase C inrush picked up 7564 „Gnd InRush PU“ Ground inrush picked up SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 210 The pickup signals of these functions will still be logged immediately. A TRIP command of one of these pro- tective functions will cause the buffered messages to be cleared since no connection exists between tripping function and buffered message. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 211 T-reset at address 3305. Figure 2-76 Example of selectivity criteria of the intermittent ground fault protection Address 3306 Nos.det. specifies the number of pickups after which a ground fault is considered intermittent. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 212 Counter of det. times elapsed 6929 IEF Tres run. Interm. E/F: reset time running 6930 IEF Trip Interm. E/F: trip 6931 Iie/In= Max RMS current value of fault = 6932 Nos.IIE= No. of detections by stage Iie>= SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 213: Dir. Intermittent Earth Fault Protection

    3 · V If the displacement voltage is directly applied to the device, then V is the voltage at the device terminals. It is not affected by parameter Vph / Vdelta (address 206). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 214 If set to Alarm Only, no tripping is possible. Only an alarm is generated. Furthermore, only a ground fault log is created. The raising pickup of the function (indication 6972 „dIEF pick up“) is the criterion for opening the ground fault log. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 215 The direction results of the recurring ignition pulses are counted and are available as value indication if their value is different than zero. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 216 It is possible that not every ignition pulse is recognized as such. If two ignition pulses are very close to one another in respect of time, they may not be detected separately. This is SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 217 Trip 6974 No.forward= dIEF: No. of detected forward pulses = 6975 No.reverse= dIEF: No. of detected reverse pulses = 6976 No.undef.= dIEF: No. of detected undefined pulses = 6979 dIEF ALARM dIEF: Alarm SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 218: Breaker Failure Protection 50bf

    Initiation The breaker failure protection function can be initiated by two different sources: • Trip signals of internal protective functions of the 7SK80, • external trip signals via binary inputs („>50BF ext SRC“). For each of the two sources, a unique pickup message is generated, a unique time delay is initiated, and a unique trip signal is generated.
  • Page 219 3·I or a second phase current is used as plau- sibility current. Figure 2-80 Monitoring of the current flow SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 220 To protect against nuisance tripping due to excessive contact bounce, a stabilization of the binary inputs for external trip signals takes place. This external signal must be present during the entire period of the delay time, otherwise the timer is reset and no trip signal is issued. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 221 Functions 2.14 Breaker Failure Protection 50BF Figure 2-82 Logic diagram of the breaker failure protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 222 Via binary input 1404 „>50BFactiv.3I0>“ you can activate the threshold value 50BF PICKUP IE> also for checking the plausibility of the phase currents. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 223 1456 50BF int Pickup 50BF (internal) PICKUP 1457 50BF ext Pickup 50BF (external) PICKUP 1471 50BF TRIP 50BF TRIP 1480 50BF int TRIP 50BF (internal) TRIP 1481 50BF ext TRIP 50BF (external) TRIP SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 224: Flexible Protection Functions

    True RMS (RMS value) Voltage protection 27, 59, 59G Displacement voltage Zero sequence system Displacement voltage Positive-sequence component Voltage protection 27, 59 Negative-sequence component Voltage asymmetry dV/dt Voltage change Voltage change protection 27R, 59R SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 225 Parameter BLK f out of r allows you to specify whether the protection function is blocked if the measured power frequency is outside the operating range of the function (25 Hz to 70 Hz). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 226 Function Logic Figure 2-84 shows the logic diagram of a three-phase function. If the function operates on one phase or without phase reference, phase selectivity and phase-specific indications are not relevant. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 227 (no. 235.2126 „$00 TRIP“). The timeout is reported via (no. 235.2125 „$00 Time Out“). Expiry of the trip time delay can be blocked via SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 228 After the picked up element has dropped out, the trip signals of the flexible protection functions are held up at least for the specified minimum trip command time 210 T TRIPCOM MIN. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 229 Parameter BLK f out of r allows you to specify whether the protection function is blocked if the measured power frequency is outside the operating range of the function (25 Hz to 70 Hz). SIEMENS recommends using the default setting (YES). A release beyond the normal operating range is only required for special applications.
  • Page 230 With phase-to-phase voltage connections the parameter is hidden. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 231 If, for example, voltage V drops to such degree that its threshold value is reached, the device then indicates pickup "Flx01 Pickup A", because the undershooting was detected in the first measured-value channel. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 232 Via parameter PICKUP WITH it is determined whether the function must be triggered on exceeding or under- shooting of the set threshold value. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 233 The following instruction should be noted: • As the power factor does not differentiate between capacitive and inductive, the sign of the reactive power may be used with CFC-help as an additional criterion. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 234 Method Positive seq. Negative seq. Zero sequence Ratio I2/I1 PICKUP WITH Exceeding Exceeding Pickup with Dropping below CURRENT Current In sensitive VOLTAGE Please select Please select Voltage Va-n Vb-n Vc-n Va-b Vb-c Vc-a SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 235 Block in case of Meas.- Voltage Loss DROPOUT RATIO 0.70 .. 0.99 0.95 Dropout Ratio DROPOUT RATIO 1.01 .. 3.00 1.05 Dropout Ratio DO differential 0.02 .. 1.00 Hz 0.03 Hz Dropout differential SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 236 Function $00 Pickup Phase C 235.2125 $00 Time Out Function $00 TRIP Delay Time Out 235.2126 $00 TRIP Function $00 TRIP 235.2128 $00 inval.set Function $00 has invalid settings 236.2127 BLK. Flex.Fct. IntSP BLOCK Flexible Function SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 237: Reverse-power Protection Application With Flexible Protection Function

    Depending on the user's philosophy, some of these criteria may be combined. This would be realized via the CFC. The example illustrates how a reverse power protection is implemented by means of the flexible protection functions. Frequency protection and voltage protection are described in Sections 2.8 and 2.5. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 238 Functions 2.16 Reverse-Power Protection Application with Flexible Protection Function Figure 2-85 Example of a substation supplied by the internal generator SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 239 Nom,sec Protection Functionality With the protection device 7SK80, the substation is disconnected from the generator upon its feedback into the power supply company's system (protection function P reverse>). This function is implemented by means of a flexible protection function. Disconnection will also be initiated if frequency or voltage fluctuations occur in the power grid (protection function f<, f>, 27-1 PICKUP, 59-1 PICKUP, 67N-1 PICKUP...
  • Page 240: Implementation Of The Reverse Power Protection

    Functions 2.16 Reverse-Power Protection Application with Flexible Protection Function Figure 2-86 Wiring diagram for a 7SK80 as reverse power protection 2.16.2 Implementation of the Reverse Power Protection General The names of messages can be edited in DIGSI and adjusted accordingly for this example. The names of the parameters are fixed.
  • Page 241 When using the reverse power protection to disconnect the substation quickly from the power supply compa- ny's system if faults occur, it is useful to select a larger pickup value (e.g. 50% of nominal power) and shorter time delays. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 242: Configuring The Reverse Power Protection In Digsi

    2.16 Reverse-Power Protection Application with Flexible Protection Function 2.16.3 Configuring the Reverse Power Protection in DIGSI First create and open a 7SK80 device in the DIGSI manager. In the scope of functions, a flexible protection function (flexible function 01) is configured for the present example. Figure 2-88 Configuration of a flexible protection function Select „Additional Functions“...
  • Page 243 If the box „Display additional settings“ is enabled in the „Settings“ menu item, pickup threshold, pickup time delay and dropout time delay can be configured. As the power direction cannot be determined in the case of a measuring voltage failure, a protection blocking is sensible in this case. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 244 Clicking the texts allows for editing short text and long text as required by the application. Figure 2-93 Messages of the flexible function – application-oriented, example The indications are allocated in the same way as the indications of other protection functions. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 245: Temperature Detection Via Rtd Box

    Temperature Detection via the I/O 2 Extension Module Up to 5 temperature sensors (Pt100, Ni 100 or Ni 120) can be connected to the 7SK80 via the I/O 2 extension module. Use a shielded three-wire cable to make the connection. The temperature at the corresponding mea- suring points is determined via the internal measuring function.
  • Page 246 RTD box contains a connection circuit diagram and a dimensioned drawing. Figure 2-95 shows the logic diagram of the temperature processing via I/O 2 extension module. Figure 2-94 Logic diagram of temperature processing for thermobox SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 247 9009. At address 9000 UDP Port you define the communication port, e.g. 5000. At address 9005 UDP Port enter an address that must be 1 higher than the address at 9000, e.g. 5001. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 248 There is no conversion when changing the temperature unit. You have to re-parameterize the threshold value according to the selected unit. The settings for all connected temperature detectors of the first and second RTD box. can be made accordingly. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 249 Processing Measured Values and Messages The RTD box is visible in DIGSI as part of the 7SK80 device, i.e. messages and measured values appear in the configuration matrix just like the internal functions and can be allocated and processed in the same way.
  • Page 250 Pickup 9021A RTD 2 TYPE Not connected Not connected RTD 2: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω 9022A RTD 2 LOCATION Other RTD 2: Location Ambient Winding Bearing Other SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 251 9046 RTD 4 STAGE 2 248 °F RTD 4: Temperature Stage 2 Pickup 9051A RTD 5 TYPE Not connected Not connected RTD 5: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 252 -50 .. 250 °C; ∞ 9075 RTD 7 STAGE 2 120 °C RTD 7: Temperature Stage 2 Pickup -58 .. 482 °F; ∞ 9076 RTD 7 STAGE 2 248 °F RTD 7: Temperature Stage 2 Pickup SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 253 Pickup -58 .. 482 °F; ∞ 9104 RTD10 STAGE 1 212 °F RTD10: Temperature Stage 1 Pickup -50 .. 250 °C; ∞ 9105 RTD10 STAGE 2 120 °C RTD10: Temperature Stage 2 Pickup SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 254 248 °F RTD12: Temperature Stage 2 Pickup 9130 Module Port Port B Port B RS485 module port for the RTD 9131 Module Port Port B Port B RS485 module port for the RTD SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 255 RTD11 Temperature stage 2 picked up 14221 Fail: RTD12 Fail: RTD12 (broken wire/shorted) 14222 RTD12 St.1 p.up RTD12 Temperature stage 1 picked up 14223 RTD12 St.2 p.up RTD12 Temperature stage 2 picked up SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 256: Phase Rotation

    Description General Various functions of the 7SK80 only operate correctly if the phase rotation of the voltages and currents is known. Among these functions are negative sequence protection, undervoltage protection (based on positive sequence voltages) and several measured quantity monitors.
  • Page 257 The normal phase sequence is set at 209 (see Section 2.1.3). If, on the system side, phase rotation is reversed temporarily, then this is communicated to the protection device using the binary input „>Reverse Rot.“ (5145). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 258: Function Logic

    Alarm Only no trip command is given, no trip log is created, fault recording is not initiated and no spon- taneous fault annunciations are shown on the display. External functions may be controlled via an output contact. Examples are: • Automatic reclosing devices, • Starting of additional devices, or similar. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 259: Tripping Logic Of The Entire Device

    Terminating the Trip Signal 2.19.3 Setting Notes Trip Signal Duration The minimum trip command duration TMin TRIP CMD was described already in Section 2.1.3. This setting applies to all protective functions that initiate tripping. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 260: Auxiliary Functions

    When auxiliary voltage is present but the relay has an internal malfunction, then the red LED ("ERROR") lights up and the relay is blocked. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 261: Information Via Display Field Or Pc

    After occurrence of a fault, the most important fault data is output automatically on the device display, without any further operating actions. It is displayed after a general device pickup in the sequence shown in Figure 2- Figure 2-99 Display of spontaneous messages in the display – example SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 262: Information To A Control Center

    Stored information can additionally be transferred to a central control and storage device if the relay is connect- ed to such a device via port B. Transmission is possible via various transmission protocols. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 263: Statistics

    Number of Trips In order to count the number of trips of 7SK80, the 7SK80 relay has to be informed of the position of the circuit breaker auxiliary contacts via binary inputs. Hereby, it is necessary that the internal pulse counter is allocated in the matrix to a binary input that is controlled by the circuit breaker OPEN position.
  • Page 264 „52 WearSet.fail“, „52WL.blk n PErr“ or „52WL.blk I PErr“ (see Section 2.1.6.2, „Power System Data 2“). The latter two indications can only take effect if the 2P-procedure was configured. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 265 Functions 2.20 Auxiliary Functions Figure 2-101 Logic of the start and end criterion SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 266 (see example in Figure 2-102). This diagram allows the number of yet possible trips to be determined (for tripping with equal tripping current). According to the example, approximately 1000 trips can SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 267 -4. If a coefficient is smaller than -4, the exponential function in the operating cycles diagram is deactivated. The maximum number of operating cycles with Isc (263 OP.CYCLES Isc) is used instead as the calculation result for the current number of operating cycles, see Figure 2-103. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 268 The calculated squared tripping currrent integrals are added to the existing statistic values. Subsequently, threshold comparison is started using threshold „ΣI^2t>“, and the new statistic values are output. If one of the values lies above the threshold, the message „Thresh. ΣI^2t>“ is generated. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 269: Motor Statistics

    If the motor startup current (parameter 1107 I MOTOR START) is not exceeded after energization detection or if the current falls below the motor startup current within 500 ms after energization detection, then this is not considered being a motor startup. No statistic is created. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 270 Current flow monitoring 212 BkrClosed I MIN, which some protective functions rely upon to detect a closed CB, is used as the current zero criterion. It should be set with respect to the actually used device functions (see also margin heading „Current Flow Monitoring (CB)“ in Section 2.1.3.2. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 271 CB tripping time T 52 BREAKTIME as well as the CB opening time T 52 OPENING of the circuit breaker. For recognition of the last zero crossing (arc deletion) of the currents after trip- ping, the „Current-zero“ Criterion is required. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 272 Number of mechanical Trips Phase C ΣI^2t A= 16014 Sum Squared Current Integral Phase A ΣI^2t B= 16015 Sum Squared Current Integral Phase B ΣI^2t C= 16016 Sum Squared Current Integral Phase C SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 273: Measurement

    N sec (calculated) = measured N sec value from the I input Ns sec. 3I0real 3I0reactive = measured N2 sec. value from the input Ph-N sec. A–B B–C C–A Ph-Ph sec. N sec. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 274 Please note that value V is indicated in the operational measured values. The ground current I is either measured directly or calculated from the conductor currents. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 275: Transmitting Measured Values

    32768). The user can define the scaling of the operational measured value to be trans- mitted. This will result in the respective transmittable measuring range. For further details, please refer to the descriptions and protocol profiles. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 276 Temperature of RTD 8 Θ RTD 9 = 1076 Temperature of RTD 9 Θ RTD10 = 1077 Temperature of RTD10 Θ RTD11 = 1078 Temperature of RTD11 Θ RTD12 = 1079 Temperature of RTD12 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 277: Average Measurements

    30801 Vph-n = Voltage phase-neutral 2.20.4 Average Measurements The long-term averages are calculated and output by the 7SK80. 2.20.4.1 Description Long-Term Averages The long-term averages of the three phase currents I , the positive sequence components I for the three phase currents, and the real power P, reactive power Q, and apparent power S are calculated within a set period of time and indicated in primary values.
  • Page 278 Ic dmd= I C demand 2.20.5 Min/Max Measurement Setup Minimum and maximum values are calculated by the 7SK80. Time and date of the last update of the values can also be read out. 2.20.5.1 Description Minimum and Maximum Values The minimum and maximum values for the three phase currents I...
  • Page 279 I A Demand Minimum IAdmdMax I A Demand Maximum IBdmdMin I B Demand Minimum IBdmdMax I B Demand Maximum ICdmdMin I C Demand Minimum ICdmdMax I C Demand Maximum I1dmdMin I1 (positive sequence) Demand Minimum SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 280 Apparent Power Minimum Smax= Apparent Power Maximum fmin= Frequency Minimum fmax= Frequency Maximum PF Max= Power Factor Maximum PF Min= Power Factor Minimum Θ/ΘTrpMax= 1058 Overload Meter Max Θ/ΘTrpMin= 1059 Overload Meter Min SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 281: Set Points For Measured Values

    This view also allows you to change the default settings of the limit values under Properties. The settings for limit values must be in percent and usually refer to nominal values of the device. For more details, see the SIPROTEC 4 System Description and the DIGSI CFC Manual. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 282: Set Points For Statistic

    Threshold Sum Curr. Exponent. exceeded 16009 Resid.Endu. < Lower Threshold of CB Residual Endurance 16010 Thresh.R.Endu.< Dropped below Threshold CB Res.Endurance ΣI^2t> 16017 Threshold Sum Squared Current Integral Thresh. ΣI^2t> 16018 Threshold Sum Squa. Curr. Int. exceeded SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 283: Energy Metering

    Pulsed Energy Wp (active) Wq(puls) Pulsed Energy Wq (reactive) WpΔ= Increment of active energy WqΔ= Increment of reactive energy WpForward MVMV Wp Forward WqForward MVMV Wq Forward WpReverse MVMV Wp Reverse WqReverse MVMV Wq Reverse SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 284: Commissioning Aids

    Thus, you can energize every single output relay to check the wiring between protected device and the system without having to create the alarm allocated to it. The procedure is described in detail in Chapter "Mounting and Commissioning". SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 285 Along with the capability of storing fault recordings via pickup of the protection function, the 7SK80 also has the capability of capturing the same data when commands are given to the device via the service program DIGSI, the serial interface, or a binary input.
  • Page 286: Command Processing

    2.21 Command Processing 2.21 Command Processing A control command function is integrated in the SIPROTEC 4 7SK80 to coordinate the operation of circuit breakers and other equipment in the power system. Control commands can originate from four command sources: • Local control at the device's operator panel •...
  • Page 287 52 Breaker 52Breaker 52 Breaker Disc.Swit. CF_D2 Disconnect Switch Disc.Swit. Disconnect Switch GndSwit. CF_D2 Ground Switch GndSwit. Ground Switch 31000 Q0 OpCnt= Q0 operationcounter= 31001 Q1 OpCnt= Q1 operationcounter= 31008 Q8 OpCnt= Q8 operationcounter= SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 288: Command Types

    • Acknowledgment and resetting commands for setting and resetting internal buffers or data states. • Information status command to set/reset the additional information "information status" of a process object, such as: – Input blocking – Output blocking SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 289: Command Sequence

    Monitoring the Command Execution The following is monitored: • Interruption of a command because of a Cancel Command • Runtime Monitor (feedback message monitoring time) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 290: Interlocking

    The check of interlocking can be programmed separately for all switching devices and tags that were set with a tagging command. Other internal commands such as manual entry or abort are not checked, i.e. carried out independent of the interlocking. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 291 Switching Authority = REMOTE) will be accepted by the device. Remote switching commands will be reject- • Switching authority REMOTE: A remote switch command (command with source REMOTE) is only allowed if remote control is enabled at the device (by configuration). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 292 Functions 2.21 Command Processing Figure 2-106 Standard interlockings SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 293 For bay interlocking, a release logic can be created using CFC. Via specific release conditions the information "released" or "bay interlocked" are available (e.g. object "52 Close" and "52 Open" with the data values: ON/OFF). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 294 The "Switching authority" object serves for interlocking or enabling LOCAL control but not REMOTE or DIGSI commands. With a 7SK80, the switching authority can be changed between "REMOTE" and "LOCAL" on the operator panel after having entered the password or by means of CFC also via binary inputs and a function key.
  • Page 295 – locked (normal) or – unlocked (unlatched) switching. With a 7SK80, the switching mode can be changed between "locked" and "unlocked" on the operator panel after having entered the password or by means of CFC also via binary inputs and a function key.
  • Page 296 – Job order: command to object "Switching mode REMOTE", ON – Job order: switching command to "switching device" • Command via CFC (automatic command, SC=Auto SICAM): – Behavior configured in the CFC block ("BOOL to command"). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 297: Command Logging

    The command types needed for tripping and closing of the switchgear or for raising and lowering of transformer taps are described in the configuration section of the SIPROTEC 4 System Description /1/ . SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 298: Notes On Device Operation

    The SIPROTEC 4 System Description applies to devices with a 4-line ASCII display. Apart from that there are devices with a graphical display and a size of 30 lines. The 7SK80 uses the outputs of the graphical display, but with 6 lines. Therefore, the representation might differ from the representations in the System Description.
  • Page 299 Functions 2.22 Notes on Device Operation In part, the sixth line is used for representing e.g. the active parameter group. Figure 2-109 Representation of the active parameter group (line 6) ■ SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 300 Functions 2.22 Notes on Device Operation SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 301: Mounting And Commissioning

    The primary tests require the protected object (line, transformer, etc.) to carry load. Mounting and Connections Checking Connections Commissioning Final Preparation of the Device SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 302: Mounting And Connections

    General Diagrams Block diagrams for the terminal assignment of the 7SK80 are shown in Appendix A.2. Connection examples for the current and voltage transformer circuits are provided in Appendix A.3.
  • Page 303 (therefore 52a is open and 52b is closed), the circuit breaker trip coil (52TC) is no longer energized and binary input (BI1) is still energized if the command relay contact is open. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 304 24 V/ 48 V; 88 V at delivery setting for nominal voltages of 60 V/ 110 V/ 125 V/ 220 V/ 250 V) Control voltage for trip circuit Ohmic resistance of the circuit breaker coil CBTC Maximum voltage on the circuit breaker coil that does not lead to tripping CBTC (LOW) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 305 Thresh. BI 176V, Thresh. BI 88V, Thresh. BI 19V are possible. For the power consumption of the resistance: Example 0.25 mA (SIPROTEC 4 7SK80) BI (HIGH) 19 V at delivery setting for nominal voltages of 24 V/ 48 V; 88 V at delivery setting...
  • Page 306: Hardware Modifications

    Any service activities exceeding the installation or exchange of com- munication modules must only be carried out by Siemens personnel. For preparing the workplace, a pad suitable for electrostatic sensitive devices (ESD) is required.
  • Page 307 Therefore, we absolutely rec- ommend to remove the terminal blocks before removing the electronics block. Figure 3-3 Electronics block without housing SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 308 Make sure that the defective fuse has not left any obvious damage on the device. If the fuse trips again after reconnection of the device, refrain from any further repairs and send the device to Siemens for repair. The device can now be reassembled again (see Section Reassembly).
  • Page 309: Connections Of The Current Terminals

    Figure 3-6 Current transformer connection As single wires, solid conductors as well as stranded conductors with conductor sleeves can be used. Up to two single wires with identical cross-sections can be used per connection. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 310: Connections Of The Voltage Terminals

    The fixing elements and the connected components are designed for the following mechanical requirements: Permissible tightening torque at the terminal screw 1.0 Nm (8.85 lb.in) Permissible traction per connected conductor 50 N based on IEC 60947-1 (VDE 660, Part 100) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 311: Connection Of The Temperature Sensors To The Extension Module I/o 2

    Put the cover on the voltage terminal. Clamp the unprotected part of the cable shield below the cable clamp closest to the connection at the shield cover. Insert the finished terminal into the brackets of the rear wall. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 312 Mounting and Commissioning 3.1 Mounting and Connections Figure 3-7 Cable connection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 313: Interface Modules

    3.1.2.5 Interface Modules General The 7SK80 relay is supplied with preconfigured interfaces according to the ordering version. You do not have to make any adaptations to the hardware (e.g. plugging in jumpers) yourself, except for the installation or re- placement of communication modules.
  • Page 314 If a SIPROTEC 4 communication module has to be removed or replaced, the steps are to be performed in reverse order. Note The installation can only be performed alone or after the installation of the Ethernet module. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 315 I/O using 2 M 2.5 screws. Figure 3-11 Installation of a SIPROTEC 4 communication module The device can now be reassembled again (see Section Reassembly). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 316: Reassembly

    Now install the device in accor- dance with the Sections Panel Flush Mounting, Panel Surface Mounting or Cubicle Mounting. Note Insert the current and voltage terminal blocks again and lock them in place! SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 317: Installation

    3.1 Mounting and Connections 3.1.3 Installation 3.1.3.1 General The 7SK80 relay has a housing size 1/6. The housing has 2 covers and 4 fixing holes each at the top and bottom (see Figure 3-13 and Figure 3-14). Figure 3-13 Housing with covers...
  • Page 318: Panel Flush Mounting

    Sections „Con- nections of the Current Terminals“ and „Connections of the Voltage Terminals“ must be strictly observed. Figure 3-15 Panel flush mounting of a 7SK80 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 319: Cubicle Mounting

    Sections „Con- nections of the Current Terminals“ and „Connections of the Voltage Terminals“ must be strictly observed. Figure 3-16 Example installation of a 7SK80 in a rack or cubicle SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 320: Panel Surface Mounting

    • Insert the device into the mounting frame (make sure that no cables are jammed). • Secure the device to the mounting frame with 4 screws. For dimensional drawings, refer to the Technical Data, Section 4.24. Figure 3-17 Mounting rails for panel surface mounting SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 321: Checking Connections

    The following tables show the pin assignment of the various interfaces. The position of the connections can be seen in the following figures. Figure 3-18 USB interface Figure 3-19 Ethernet connections at the device bottom Figure 3-20 Serial interface at the device bottom SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 322 With RS232 and fiber optic interfaces, each connection is dedicated to one transmission direction. For that reason the data output of one device must be connected to the data input of the other device and vice versa. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 323 The standard setting of the character idle state for the optical fiber interface is „Light off“. If the character idle state is to be changed, use the operating program DIGSI as described in the SIPROTEC 4 System Description. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 324 RTD-Box to RS485 If a 7XV5662-6AD10 RTD box is connected, check its connections to the interface (port B). Verify also the termination: The terminating resistors must be connected to 7SK80 (see margin heading „Ter- mination“). For more information on the 7XV5662-6AD10, please refer to the enclosed device manual. Check the trans- mission parameters at the RTD box.
  • Page 325: Checking The System Connections

    – Is the phase assignment of the voltage transformers correct? – Is the polarity for the current input I correct (if used)? – Is the polarity for the voltage input V correct (if used e.g. for broken delta winding or busbar voltage)? SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 326 3.2 Checking Connections • If the voltage measurement is carried out via feedthrough capacitances, the feedthrough capacitance for the 7SK80 must be available exclusively.. Parallel connections such as, for example, CAPDIS are not permis- sible. In the case of a voltage measurement via feedthrough capacitances, the value of the individual capacitances C1 and C2 for the three phases must be known approximately (also see Section 2.1.3.2,„...
  • Page 327: Commissioning

    Primary tests are only allowed to be carried out by qualified personnel, who are familiar with the commissioning of protection systems, the operation of the plant and the safety rules and regulations (switching, grounding, etc.). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 328: Test Mode And Transmission Block

    Depending on annunciation type, several input fields are offered (e.g. message „ON“ / message „OFF“). By clicking on one of the fields you can select the desired value from the pull-down menu. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 329 To end the System Interface Test, click on Close. The device is briefly out of service while the start-up routine is executed. The dialog box closes. Test in Command Direction The information transmitted in command direction must be indicated by the central station. Check whether the reaction is correct. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 330: Configuring Communication Modules

    The type of communication module for port B is to be stated in the dialog box "Additional informa- tion"which can be reached via the pushbutton "L: ...". Figure 3-23 DIGSI 4.3: Profibus DP protocol selection (example) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 331 (see Figure 3-25). The type of this setting depends of the protocol used and is described in the protocol documentation. Please only perform the described changes in the settings window and confirm your entries with "OK". SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 332 The system interface (EN 100) is preassigned with the default value zero and the module is thus set to DHCP mode. The IP address can be set in the DIGSI Manager (Object properties... / Communication parameters / System interface [Ethernet]). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 333: Checking The Status Of Binary Inputs And Outputs

    The dialog box is classified into three groups: BI for binary inputs, REL for output relays, and LED for light- emitting diodes. On the left of each of these groups is an accordingly labeled button. By double-clicking a button, information regarding the associated group can be shown or hidden. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 334 Test of the Output Relays Each individual output relay can be energized for checking the wiring between the output relay of the 7SK80 and the substation, without having to generate the message assigned to it. As soon as the first change of state for any one of the output relays is initiated, all output relays are separated from the internal device functions and can only be operated by the hardware test function.
  • Page 335: Tests For Breaker Failure Protection

    3.3 Commissioning Test of the Binary Inputs To test the wiring between the substation and the binary inputs of the 7SK80, the condition in the substation which initiates the binary input must be generated and the response of the device checked.
  • Page 336 • After every start, the message „50BF ext Pickup“ (FNo 1457) must appear in the spontaneous or fault annunciations. • After time expiration TRIP-Timer (address 7005) tripping command of the breaker failure protection. Open the circuit breaker again. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 337: Testing User-defined Functions

    Messages from the symmetry monitoring could occur because there actually are asymmetrical conditions in the network. If these asymmetrical conditions are normal service conditions, the corresponding monitoring functions should be made less sensitive. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 338 If one of the events does not appear, the connection and allocation of these signals must be checked. If the „ON“-state and „OFF“–state are swapped, the contact type (H–active or L–active) must be checked and remedied. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 339: Testing The Reverse Interlocking Scheme

    Tripping is performed within time 50- 1 DELAY (longer time period) (with definite time overcurrent protection) or according to Curve (with inverse time overcurrent protection). These tests also check the proper functioning of the wiring for reverse interlocking. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 340: Direction Check With Load Current

    If both the active power and the reactive power have the wrong sign and 1108 P,Q sign is set to not reversed, the polarity according to address 201 CT Starpoint must be checked and corrected. The line is switched off again after completion. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 341: Polarity Check For Voltage Input V 3

    Polarity Check for Voltage Input V Depending on the application of the voltage measuring input V of a 7SK80, a polarity check may be necessary. If no measuring voltage is connected to this input, this section is irrelevant. (Power System Data 1 address 213...
  • Page 342 The directional ground fault protection must be configured to enabled and activated (address 116 or 131). Its pickup threshold must be below the load current of the line; if necessary the pickup threshold must be reduced. The parameters that have been changed, must be noted. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 343 Important! If parameters were changed for this test, they must be returned to their original state after comple- tion of the test ! Figure 3-29 Polarity testing for I , example with current transformers configured in a Holmgreen-connection (VTs with broken delta connection -- e-n winding) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 344: Checking The Temperature Detection

    For checking the measured temperature values, the temperature detectors are replaced by adjustable resistors (e.g. precision resistance decade) and the correct assignment of the resistance value and the displayed tem- perature for 2 or 3 temperature values from the following table are verified. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 345 249.79516 299.754192 179.527525 259.200121 311.040145 183.1875 268.886968 322.664362 186.835925 278.868111 334.641733 190.4728 289.15625 346.9875 194.098125 Temperature thresholds that are configured in the protection device can be checked by slowly approaching the resistance value. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 346: Trip/close Tests For The Configured Operating Devices

    To be able to trip a test fault record, parameter Osc Fault Rec. must be configured to in the Functional Scope. Apart from the option to store fault records via pickup of the protection function, the 7SK80 also allows for ini- tiating a measured value recording via the DIGSI operating program, the serial interface and binary input.
  • Page 347 Oscillographic recording is started immediately. During recording, a report is given in the left part of the status bar. Bar segments additionally indicate the progress of the procedure. The SIGRA or the Comtrade Viewer program is required to view and analyse the oscillographic data. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 348: Final Preparation Of The Device

    The green „RUN“ LED must light up, whereas the red „ERROR“ must not light up. Close the protective switches. If test switches are available, then these must be in the operating position. The device is now ready for operation. ■ SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 349 Technical Data This chapter provides the technical data of the device SIPROTEC 7SK80 and its individual functions, including the limit values that may not be exceeded under any circumstances. The electrical and functional data for the maximum functional scope are followed by the mechanical specifications with dimensioned drawings.
  • Page 350: General Device Data

    34 V – 200 V (adjustable) for connection of phase-to-phase voltages Measuring Range 0 V to 200 V Burden at 100 V approx. 0.005 VA Overload capacity in the voltage path – thermal (rms) 230 V continuous SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 351: Auxiliary Voltage

    24 to 125 VDC V high > 19 VDC V low < 10 VDC for nominal voltages 110 to 250 VDC V high > 88 VDC V low < 44 VDC SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 352: Communication Interfaces

    RJ45 socket 100BaseT in acc. with IEEE802.3 LED yellow: 10/100 Mbit/s (on/off) LED green: connection/no connection (on/off) Test voltage 500 V; 50 Hz Transmission speed 10/100 Mbit/s Bridgeable distance 20 m (66 ft) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 353 Up to 1.5 MBd 1 000 m (3 300 ft) at ≤ 93.75 kBd Bridgeable distance 500 m (1 600 ft) at ≤ 187.5 kBd 200 m (660 ft) at ≤ 1.5 MBd SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 354 Back case bottom, mounting location "B", IEC61850 Duplex-LC, 100BaseF acc. to IEEE802.3 DNP3 TCP Transmission speed 100 Mbit/s PROFINET Optical wavelength 1300 nm or SICAM I/O unit 7XV5673 Bridgeable distance max. 2 km (1.24 mi) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 355: Electrical Tests

    4 kV; 12 Ω; 9 µF Auxiliary voltage Diff. mode:1 kV; 2 Ω; 18 µF common mode: 4 kV; 42 Ω; 0,5 µF Measuring inputs, binary inputs and Diff. mode: 1 kV; 42 Ω; 0,5 µF relay outputs SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 356: Mechanical Tests

    1 Hz to 8 Hz: ±3.5 mm amplitude (vertical axis) IEC 60068-3-3 8 Hz to 35 Hz: 2 g acceleration (horizontal axis) 8 Hz to 35 Hz: 1 g acceleration (vertical axis) Frequency sweep 1 octave/min 1 cycle in 3 orthogonal axes SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 357: Climatic Stress Tests

    56 days of the year up to 93 % relative humidity; con- densation must be avoided! Siemens recommends that all devices be installed such that they are not exposed to direct sunlight, nor subject to large fluctuations in temperature that may cause condensation to occur.
  • Page 358: Service Conditions

    For equipment in the surface-mounting case IP 50 For equipment in flush mounting case Front IP 51 Rear IP 50 for operator protection IP 2x for current terminal IP 1x for voltage terminal Degree of pollution, IEC 60255-27 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 359: Ul Certification Conditions

    Design Field Wires of Control Circuits shall be separated from other circuits with respect to the end use requirements! Type 1 if mounted into a door or front cover of an enclosure. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 360: Definite-time Overcurrent Protection

    30 ms Instantaneous value approx. 40 ms Dropout Ratio Dropout ratio for ≥ 0.3 - first harmonic, rms value approx. 0,95 for I/I ≥ 0.3 - instantaneous value approx. 0,90 for I/I SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 361 - up to 10 % 3rd harmonic - up to 10 % 5th harmonic at instantaneous value of 50-3/50N-3 elements Increased tolerances Transient overreaction for τ > 100 ms (with full displace- <5 % ment) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 362: Inverse-time Overcurrent Protection

    For zero sequence current, read 3I0p instead of I and T instead of T 3I0p for ground fault, read I instead of I and T instead of T Pickup threshold approx. 1.10 · I SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 363 Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic Transient overreaction during first harmonic measuring technique for τ > 100 ms (with full <5 % displacement) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 364 Technical Data 4.3 Inverse-time Overcurrent Protection Figure 4-1 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to IEC SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 365 Technical Data 4.3 Inverse-time Overcurrent Protection Figure 4-2 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to IEC SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 366 For zero sequence current read 3I0p instead of I and T instead of T 3I0p for ground fault read I instead of I and T instead of T Pickup Threshold approx. 1.10 · I SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 367 ≤ 20 5 % of reference (calculated) value +2 % current tolerance, or 30 ms Dropout Time for I/Ip ≤ 0,90 5 % of reference (calculated) value +2 % current tolerance, or 30 ms SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 368 Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic Transient overreaction during first harmonic measuring technique for τ > 100 ms (with full <5 % displacement) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 369 Technical Data 4.3 Inverse-time Overcurrent Protection Figure 4-3 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to ANSI/IEEE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 370 Technical Data 4.3 Inverse-time Overcurrent Protection Figure 4-4 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to ANSI/IEEE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 371 Technical Data 4.3 Inverse-time Overcurrent Protection Figure 4-5 Dropout time and trip time curves of the inverse time overcurrent protection, acc. to ANSI/IEEE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 372 Technical Data 4.3 Inverse-time Overcurrent Protection Figure 4-6 Dropout time and trip time curve of the inverse time overcurrent protection, acc. to ANSI/IEEE SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 373: Directional Overcurrent Protection Ground

    40 ms Dropout times 67N-1, 67N-2, 67N-3 approx. 40 ms Tolerances ±3° electrical Phase-angle error for ground faults Influencing variables Frequency influence approx. 1° in the range of 0.95 < f/f < 1.05 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 374: Inrush Restraint

    Upper function limit, configurable for I = 1 A 0.30 A to 25.00 A Increments 0.01 A for I = 5 A 1.50 A to 125.00 A Increments 0.01 A Cross-blocking Cross-blocking I ON/OFF SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 375 Fast Reset Time T Stop Dynamic Settings of Pickup Currents and Adjustable within the same ranges and with the same incre- Time Delays or Time Multipliers ments as the directional and non-directional time overcurrent protection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 376 150 V for phase-to-phase voltage max. 260 V for phase-to-Ground voltage Minimum hysteresis 0.6 V Time delay T 59-1, T 59-2 0.00 s to 100.00 s or Increments 0.01 s ∞ (disabled) r = V dropout pickup SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 377 ≤ 1.05 (f = 50 Hz or 60 Frequency outside range 0.95 ≤ f/f ≤ 1.05 Increased tolerances Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 378: Negative Sequence Protection (definite-time Characteristic)

    Frequency outside range 0.95 ≤ f/f ≤ 1.05 Increased tolerances Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic Transient overreaction for τ > 100 ms (with full displacement) <5 % SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 379: Negative Sequence Protection (inverse-time Characteristics)

    = 5 A all phase currents ≤ 50 A for I Trip Time Curves acc. to IEC See also Figure 4-7 ≥ 20 are identical to those for I The trip times for I = 20. Pickup Threshold Approx. 1.10· I SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 380 5 % of reference (calculated) value +2 % current tolerance, or 30 ms Dropout Time Curves with Disk Emulation acc. to ANSI Representation of the possible dropout time curves, see figure 4-8 and 4-9 each on the left side of the figure SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 381 Frequency in range 0.95 ≤ f/f ≤ 1.05 Increased Tolerances Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic Transient overreaction for τ > 100 ms (with full displacement) <5 % SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 382 Technical Data 4.9 Negative Sequence Protection (inverse-time characteristics) Figure 4-7 Trip time characteristics of the inverse time negative sequence element 46-TOC, acc. to IEC SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 383 Technical Data 4.9 Negative Sequence Protection (inverse-time characteristics) Figure 4-8 Dropout time and trip time characteristics of the inverse time unbalanced load stage, acc. to ANSI SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 384 Technical Data 4.9 Negative Sequence Protection (inverse-time characteristics) Figure 4-9 Dropout time and trip time characteristics of the inverse time unbalanced load stage, acc. to ANSI SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 385: Motor Starting Time Supervision

    ≤ 1.05 (f = 50 Hz or 60 Hz) Frequency outside range of 0.95 ≤ f/f ≤ 1.05 Increased tolerances Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 386: Motor Restart Inhibit

    Frequency in the range from 25 Hz to 70 Hz Frequency in the range of 0.95 ≤ f/f ≤ 1.05 (f = 50 Hz or 60 Hz) Frequency outside range of 0.95 ≤ f/f ≤ 1.05 Increased tolerances SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 387 ≤ 1.05 (f = 50 Hz or 60 Hz) Frequency outside range of 0.95 ≤ f/f ≤ 1.05 Increased tolerances Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 388: Frequency Protection

    PSNom Temperature in range 23.00 °F (-5 °C) ≤ Θ ≤ 131.00 °F (55 °C) 0.5 %/10 K Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 389: Thermal Overload Protection

    Frequency in range of 25 Hz – 70 Hz Frequency in the range of 0.95 ≤ f/f ≤ 1.05 (f = 50 Hz or 60 Hz) Frequency outside range 0.95 ≤ f/f ≤ 1.05 Increased tolerances SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 390 Technical Data 4.14 Thermal Overload Protection Figure 4-10 Trip time curves for the thermal overload protection (49) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 391: Ground Fault Detection (sensitive/insensitive)

    3 % of setting value or 15 mA for I = 1 A, or 75 mA for I = 5 A Operating time tolerance 1 % of setting value or 10 ms SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 392 Note: When using the sensitive transformer, the linear range of the measuring input for sensitive ground fault detection is from 0.001 A to 1.6 A or 0.005 A to 8.0 A, depending on parameter 205 CT SECONDARY. The function is however still preserved for larger currents. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 393 Increments 0.1 V 3V0 calculated 10 V to 90 V Increments 1 V Phase angle 50Ns-2 Phi - 180° to 180° Increments 1° Delta phase angle 50Ns-2 DeltaPhi 0° to 180° Increments 1° SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 394 Note: Due to the high sensitivity, the linear range of the measuring input I with integrated sensitive input transformer is from 0.001 · I to 1.6 · I . For currents greater than 1.6 · I , correct direction determi- nation can no longer be guaranteed. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 395 <1 % PSNom Temperature in range 23.00 °F (-5 °C) ≤ Θ ≤ 131.00 °F (55 °C) <0.5 %/ K Frequency in range 25 Hz to 70 Hz <5% relating to the set time SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 396: Directional Intermittent Ground Fault Protection

    Influencing Variables Power supply direct voltage in range 0.8 ≤ V ≤ 1.15 <1 % PSNom Temperature in range 23.00 °F (-5 °C) ≤ Θ ≤ 131.00 °F (55 °C) <0.5 %/ K SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 397 ≤ 1.05 Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic A further delay for the current may be caused by compensation in the secondary CT circuit. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 398 Command delay time 0.00 s to 3600.00 s Increments 0.01 s Dropout delay 0.00 s to 60.00 s Increments 0.01 s Fixed Dropout Difference Dropout difference df/dt 0.1 Hz/s Dropout difference dV/dt 3 V/s SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 399 < 30 ms Power typical < 50 ms maximum < 350 ms Power factor < 300 ms Frequency < 100 ms Frequency change < 200 ms Voltage change <200 ms Binary input < 10 ms SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 400 ≤ 1.05 (f = 50 Hz or 60 Hz) Frequency outside range 0.95 ≤ f/f ≤ 1.05 Increased tolerances Harmonics - up to 10 % 3rd harmonic - up to 10 % 5th harmonic SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 401: Temperature Detection

    ± 0.5 % of measured value ± 1 °C or 1 °F ±1.5 °C at temperatures < 100 °C ± 0.5 % of measured value ± 1 digit Tolerance Current sensor 3.58 mA 14 Ω Line resistance SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 402 –58 °F to 482 °F (increment 1 °F) or ∞ (no message) Stage 2 –50 °C to 250 °C (increment 1 °C) –58 °F to 482 °F (increment 1 °F) or ∞ (no message) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 403: User-defined Functions (cfc)

    Division DM_DECODE Decode Double Point DYN_OR Dynamic OR INT_TO_REAL Conversion IO_UNIT SICAM I/O Unit LIVE_ZERO Live-zero, non-linear — — — Curve LONG_TIMER Timer (max.1193h) LOOP Feedback Loop — SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 404 ASWITCH – This block is used to switch between two REAL inputs (RMS values). Name Type Description Default function Input SWITCH BOOL Analog value selection FALSE REAL Analog value REAL Analog value Output REAL Selected analog value SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 405 The time values for the blocks TIMER and TIMER_SHORT must not be selected shorter than the time res- olution of the device of 10 ms, as then, the blocks will not then start with the starting pulse. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 406 Combination with input signal border Combination with output signal border Additionally for each chart Arithmetic ABS_VALUE SQUARE_ROOT Base logic CONNECT DYN_OR NAND RISE_DETECT X_OR Information status SI_GET_STATUS CV_GET_STATUS DI_GET_STATUS MV_GET_STATUS SI_SET_STATUS DI_SET_STATUS MV_SET_STATUS ST_AND ST_OR ST_NOT SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 407 Time and clock pulse TIMER TIMER_LONG TIMER_SHORT ALARM BLINK Other IO_UNIT Routable in Matrix In addition to the defined preassignments, indications and measured values can be freely routed to buffers, preconfigurations can be removed. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 408: Additional Functions

    0 % to 400 % Tolerance 5% class accuracy per IEC 60255-8 Currents of sensitive ground fault detection in A (kA) primary and in mA secondary (total, active, and reactive current) Ns real Ns reactive SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 409 Min/Max Values for Voltages (Positive Sequence Component); S, P; Q, cos ϕ; frequency Min/Max Values for Power Θ/Θ Min/Max Values for Overload Protection Trip Min/Max Values for Mean Values Admd Bdmd Cdmd (positive sequence component); SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 410 5 s per fault record, in total up to 18 s at 50 Hz (max. 15 s at 60 Hz) Intervals at 50 Hz 1 instantaneous value each per 1.0 ms Intervals at 60 Hz 1 instantaneous value each per 0.83 ms SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 411 I Measured value acquisition/processing phase-selective Evaluation one limit value each per subfunction Saved number of statistical values up to 13 decimal places Trip Circuit Supervision With one or two binary inputs. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 412 GOOSE messages depends on both the number of IEC 61850 clients and the relay's pickup con- dition, GOOSE is not generally qualified for protection-relevant applications. The protective application is to be checked with regard to the required transmission time and cleared with the manufacturer. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 413: Switching Device Control

    PLC logic, graphic input tool Local Control Control via menu control assignment of function keys Remote Control Using Communication Interfaces Using a substation automation and control system (e.g. SICAM) Using DIGSI (e.g. via Modem) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 414: Dimensions

    Panel Flush and Cubicle Mounting (Housing Size 1/6) Figure 4-11 Dimensional drawing of a 7SK80 for panel flush or cubicle mounting (housing size Note: A set of mounting brackets (consisting of upper and lower mounting rail) (order no. C73165-A63-D200-1) is required for cubicle mounting.
  • Page 415: Panel Surface Mounting (housing Size 1/6)

    Technical Data 4.24 Dimensions 4.24.3 Panel Surface Mounting (Housing Size 1/6) Figure 4-13 Dimensional drawing of a 7SK80 for panel surface mounting (housing size SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 416: Bottom View

    Technical Data 4.24 Dimensions 4.24.4 Bottom view Figure 4-14 Bottom view of a 7SK80 (housing size ■ SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 417 Default settings are also given. Ordering Information and Accessories Terminal Assignments Connection Examples Current Transformer Requirements Default Settings Protocol-dependent Functions Functional Scope Settings Information List A.10 Group Alarms A.11 Measured Values SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 418: A.1 Ordering Information And Accessories

    Appendix A.1 Ordering Information and Accessories Ordering Information and Accessories A.1.1 Ordering Information A.1.1.1 7SK80 V4.7 Multifunctional 10 11 12 13 14 15 16 Supplemen- protection device tary with control – – Number of binary inputs and outputs Pos. 6 Housing 1/6 19”...
  • Page 419 Ethernet interface (DIGSI interface, RTD box connection, I/O unit connection, not IEC61850), RJ45 con- nector Measurement / Fault Recording Pos. 13 With fault recording With fault recording, average values, min/max values SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 420 (normal Ie input) only with sensitive input, Position 7=2 only deliverable with position 6 = 1, 2 or 5 only deliverable with position 6 = 3, 4 or 6 (3 x V) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 421: A.1.2 Accessories

    RTD box RS 485, Vaux = 24 to 240 V AC/DC 7XV5662–6AD10 RTD box with Ethernet connection, VH = 24 to 240 V AC/DC 7XV5662-8AD10 RS485 FO converter RS485 FO converter Order No. 820 nm; FC–Connector 7XV5650-0AA00 820 nm, with ST-Connector 7XV5650-0BA00 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 422 If the voltage terminal is used for internal temperature detection (7SK805 and 7SK806), the shield for the voltage terminal is additionally required. Varistor Voltage-limiting resistor for high-impedance differential protection Name Order number 125 Veff, 600 A, 1S/S256 W73028-V3125-A1 240 Veff, 600 A, 1S/S1088 W73028-V3300-A2 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 423: A.2 Terminal Assignments

    Appendix A.2 Terminal Assignments Terminal Assignments A.2.1 7SK80 — Housing for panel flush mounting and cubicle installation and for panel surface mounting 7SK801* Figure A-1 Block diagram 7SK801* SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 424 Appendix A.2 Terminal Assignments 7SK802* Figure A-2 Block diagram 7SK802* SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 425 Appendix A.2 Terminal Assignments 7SK803* Figure A-3 General diagram 7SK803* SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 426 Appendix A.2 Terminal Assignments 7SK804* Figure A-4 General diagram 7SK804* SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 427 Appendix A.2 Terminal Assignments 7SK805* Figure A-5 General diagram 7SK805* The shielding of the connecting cable is connected directly to the shield cap. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 428 Appendix A.2 Terminal Assignments 7SK806* Figure A-6 General diagram 7SK806* The shield of the connecting cable is connected directly to the shield cover. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 429: A.3 Connection Examples

    Current transformer connections to three current transformers and neutral rpoint current (ground current) (Holmgreen connection) – appropriate for all networks Figure A-8 Current transformer connections to two current transformers – only for isolated or resonant- grounded networks SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 430 - only for isolated or resonant-grounded net- works Important: Grounding of the cable shield must be effected at the cable side Note: The switchover of the current polarity (address 201) also reverses the polarity of the current input INs! SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 431 The switchover of the current polarity (address 201) also reverses the polarity of the current input INs! Figure A-12 Transformer connections to three current transformers and three voltage transformers (phase-to-ground voltages), normal circuit layout – appropriate for all networks SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 432 Appendix A.3 Connection Examples Figure A-13 Transformer connections to three current transformers and three voltage transformers - capacitive - SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 433 Appendix A.3 Connection Examples Figure A-14 Transformer connections to three current transformers, two voltage transformers (phase-to-phase voltages) and broken delta winding (da-dn) – appropriate for all networks SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 434 Hint If the system has only 2 voltage transformers (open-delta connection), the device, too, should be con- nected in open-delta connection and the unused voltage input should be short-circuited. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 435 For busbar-side grounding of the current transformers, the current polarity of the device is changed via address 0201. This also reverses the polarity of the current input IN/INs. When using a cable-type current transformer, the connection of k and I at F8 and F7 must be exchanged. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 436 For busbar-side grounding of the current transformers, the current polarity of the device is changed via address 0201. This also reverses the polarity of current input INs. When using a cable-type current transformer, the con- nection of k and I at F8 and F7 must be exchanged. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 437 0201. This also reverses the polarity of the current input IN/INs. When using a cable-type current transformer, the connection of k and l at F8 and F7 must be exchanged. Figure A-20 Example for the connection type "VAN, VBN, VCN" with voltage connection on the feeder side SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 438 Figure A-21 Voltage transformer connections to two voltage transformers (phase-to-phase voltages) and broken delta winding (da-dn) – appropriate for all networks Figure A-22 Example for connection type "VAN, VBN, VCN" busbar-side voltage connection SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 439 Appendix A.3 Connection Examples Figure A-23 Example for connection type "VAB, VBC, Vx" Figure A-24 Example for connection type "VAB, VBC" SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 440: A.3.1 Connection Example For Rtd Box

    A.3.2 Connection Examples for SICAM I/O Units and RTD Box Figure A-27 Connection of 2 SICAM I/O Units to Port A via Y-cabel (up to 2 SICAM I/O-Units connectable) Y-Cabel 7KE6000–8GD00–0BA2 RJ45 Cabel SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 441 Appendix A.3 Connection Examples Figure A-28 Connection of 2 SICAM I/O units and 1 RTD box via Y cable (up to 2 SICAM I/O units connect- able) Y-cabel 7KE6000–8GD00–0BA2 RJ45 cabel SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 442: A.4 Current Transformer Requirements

    = 20 ALF' = 0.6 Ω (device and cables) set to 10, = 3 Ω so that: 5P10, 5 VA = 5 Ω (5 VA) with = secondary transformer nominal current sNom SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 443: A.4.2 Class Conversion

    Maximum connected load – For secondary current threshold values ≥ 20 mA ≤ 1.2 VA (≤ 1.2 Ω) ≤ 0.4 VA (≤ 0.4 Ω) – For secondary current threshold values < 20 mA SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 444: Class Accuracy

    Function non-directional Class 3 Class 1 Class 3 For extremely small ground fault currents it may become necessary to correct the angle at the device (see func- tion description of „sensitive ground fault detection“). SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 445: A.5 Default Settings

    Fail Ph. Seq. I Failure: Phase Sequence Current Fail Ph. Seq. V Failure: Phase Sequence Voltage VT brk. wire Failure VT circuit: broken wire LED7 Not configured No Function configured LED8 Brk OPENED Breaker OPENED SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 446: A.5.2 Binary Input

    >52-a contact (OPEN, if bkr is open) 52Breaker 52 Breaker Table A-8 Further binary input presettings for 7SK802* or 7SK804* Binary Input Default function Function No. Description not pre-assigned not pre-assigned not pre-assigned not pre-assigned SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 447: A.5.3 Binary Output

    Default function Display of the operational indications Display of the primary operational measured values Display of the last fault log buffer not pre-assigned not pre-assigned not pre-assigned not pre-assigned not pre-assigned not pre-assigned SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 448: A.5.5 Default Display

    6-line display of 7SK80 Figure A-29 Default display of the 7SK80 for models with V without extended measured values With the V0/IO ϕ measurement, the measured ground current IN2 is displayed under N and the ground current IN or INs under Ns.
  • Page 449 Appendix A.5 Default Settings Figure A-30 Default display of 7SK80 for models with V with extended measured values Figure A-31 Default display of the 7SK80 for models without V and extended measured values SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 450 Appendix A.5 Default Settings Figure A-32 Default display of the 7SK80 for models without V with extended measured values Spontaneous Fault Display After a fault has occurred, the most important fault data are automatically displayed after general device pickup in the order shown in the picture below.
  • Page 451: A.6 Protocol-dependent Functions

    57600 cal fiber) 300 to (Modbus) 6 MBaud 57600 (RS485) Type RS232 RS485 Ethernet Ethernet RS485 Ethernet RS485 RS485 optical fiber optical fiber optical fiber Ethernet (double ring) Ethernet optical fiber optical fiber SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 452: A.7 Functional Scope

    66 Startup Counter for Motors Enabled Load Jam Prot. Disabled Enabled Load Jam Protection Enabled 27/59 Disabled Disabled 27, 59 Under/Overvoltage Protec- Enabled tion 81 O/U Disabled Disabled 81 Over/Underfrequency Protec- Enabled tion SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 453 Flex. Function 10 Flex. Function 11 Flex. Function 12 Flex. Function 13 Flex. Function 14 Flex. Function 15 Flex. Function 16 Flex. Function 17 Flex. Function 18 Flex. Function 19 Flex. Function 20 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 454: A.8 Settings

    110.0 V Pickup Threshold P.U. THRESHOLD 40.00 .. 60.00 Hz 51.00 Hz Pickup Threshold P.U. THRESHOLD 50.00 .. 70.00 Hz 61.00 Hz Pickup Threshold P.U. THRESHOLD 0.10 .. 20.00 Hz/s 5.00 Hz/s Pickup Threshold SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 455 P.System Data 1 Thresh. BI 176V Thresh. BI 176V Threshold for Binary Input 7 Thresh. BI 88V Thresh. BI 19V VXnom PRIMARY P.System Data 1 0.10 .. 800.00 kV 20.00 kV Rated Primary Voltage X SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 456 Rated secondary ground voltage LPCT 320A Corr.factor IL1 P.System Data 1 0.9000 .. 1.1000 1.0000 Correction factor for magnitude 321A Corr.factor IL2 P.System Data 1 0.9000 .. 1.1000 1.0000 Correction factor for magnitude SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 457 W2S day Device, General Monday Sunday day of time set winter to summer Tuesday Wednesday Thursday Friday Saturday Sunday W2S hour Device, General 1 .. 24 hour of time set winter to summer SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 458 50/51 Overcur. Fundamental Fundamental 50-3 measurement of True RMS Instantaneous 1220A 50-2 measurem. 50/51 Overcur. Fundamental Fundamental 50-2 measurement of True RMS 1221A 50-1 measurem. 50/51 Overcur. Fundamental Fundamental 50-1 measurement of True RMS SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 459 67-TOC Direct. 67 Direct. O/C Forward Forward 67-TOC Direction Reverse Non-Directional 1526 67-3 Direction 67 Direct. O/C Forward Forward 67-3 Direction Reverse Non-Directional 1601 FCT 67N/67N-TOC 67 Direct. O/C 67N, 67N-TOC Ground Time Overcurrent SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 460 0 .. 21600 sec 3600 sec Circuit Breaker OPEN Time 1704 Active Time ColdLoadPickup 0 .. 21600 sec 3600 sec Active Time 1 .. 600 sec; ∞ 1705 Stop Time ColdLoadPickup 600 sec Stop Time SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 461 (Sensitive) Ground Fault ON with GF log Alarm Only 3102 CT Err. I1 Sens. Gnd Fault 0.001 .. 1.600 A 0.050 A Current I1 for CT Angle Error 0.005 .. 8.000 A 0.250 A SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 462 50Ns-2 angle phi 3152 50Ns-2 DeltaPhi Sens. Gnd Fault 0.0 .. 180.0 ° 30.0 ° 50Ns-2 angle delta phi 3153 50Ns-1 Vmin Sens. Gnd Fault 0.4 .. 50.0 V 6.0 V 50Ns-1 minimum voltage SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 463 2.50 .. 80.00 A 25.00 A 4103 STARTUP TIME 48/66/51M Motor 1.0 .. 180.0 sec 10.0 sec Startup Time 0.5 .. 180.0 sec; ∞ 4104 LOCK ROTOR TIME 48/66/51M Motor 2.0 sec Permissible Locked Rotor Time SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 464 50 V 59-2 Pickup V2 5017A 59-1 DOUT RATIO 27/59 O/U Volt. 0.90 .. 0.99 0.95 59-1 Dropout Ratio 5018A 59-2 DOUT RATIO 27/59 O/U Volt. 0.90 .. 0.99 0.95 59-2 Dropout Ratio SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 465 81-4 Time delay 5415A DO differential 81 O/U Freq. 0.02 .. 1.00 Hz 0.02 Hz Dropout differential 5421 FCT 81-1 O/U 81 O/U Freq. 81-1 Over/Under Frequency Pro- ON f> tection ON f< SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 466 UDP service port in the RTD box 9001 IP address[0] RTD-Box 0 .. 255 IP address[0] of RTD box, connec. by UDP 9002 IP address[1] RTD-Box 0 .. 255 IP address[1] of RTD box, connec. by UDP SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 467 RTD 3 STAGE 2 RTD-Box 248 °F RTD 3: Temperature Stage 2 Pickup 9041A RTD 4 TYPE RTD-Box Not connected Not connected RTD 4: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 468 RTD 7 STAGE 2 RTD-Box 248 °F RTD 7: Temperature Stage 2 Pickup 9081A RTD 8 TYPE RTD-Box Not connected Not connected RTD 8: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 469 -58 .. 482 °F; ∞ 9116 RTD11 STAGE 2 RTD-Box 248 °F RTD11: Temperature Stage 2 Pickup 9121A RTD12 TYPE RTD-Box Not connected Not connected RTD12: Type Pt 100 Ω Ni 120 Ω Ni 100 Ω SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 470 RTD12: Temperature Stage 2 Pickup 9130 Module Port RTD-Box Port B Port B RS485 module port for the RTD 9131 Module Port RTD-Box Port B Port B RS485 module port for the RTD SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 471: A.9 Information List

    Setting Group B is active (P-GrpB Change Group IntSP act) Setting Group C is active (P- Change Group IntSP GrpC act) Setting Group D is active (P- Change Group IntSP GrpD act) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 472 No Function configured (Not con- Device, General figured) Function Not Available (Non Exis- Device, General tent) >Synchronize Internal Real Time Device, General SP_E LED BI Clock (>Time Synch) >Trigger Waveform Capture Osc. Fault Rec. LED BI (>Trig.Wave.Cap.) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 473 Σ I) Failure: Current Balance (Fail I Measurem.Superv balance) Failure: Voltage Balance (Fail V Measurem.Superv balance) VT Fuse Failure (alarm >10s) (VT Measurem.Superv FuseFail>10s) VT Fuse Failure (alarm instanta- Measurem.Superv neous) (VT FuseFail) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 474 BLOCKED) 235.2119 Function $00 is switched OFF ($00 OFF) 235.2120 Function $00 is ACTIVE ($00 ACTIVE) 235.2121 Function $00 picked up ($00 picked up) 235.2122 Function $00 Pickup Phase A ($00 pickup A) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 475 LED BI MiMaReset) >V MIN/MAX Buffer Reset (>V Min/Max meter LED BI MiMaReset) >Vphph MIN/MAX Buffer Reset Min/Max meter LED BI (>VphphMiMaRes) >V1 MIN/MAX Buffer Reset (>V1 Min/Max meter LED BI MiMa Reset) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 476 Ph B (Σ Ib =) 1023 Accumulation of interrupted Statistics current Ph C (Σ Ic =) 1201 >BLOCK 64 (>BLOCK 64) Sens. Gnd Fault LED BI 1202 >BLOCK 50Ns-2 (>BLOCK Sens. Gnd Fault LED BI 50Ns-2) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 477 50BF BkrFailure LED BI 1404 >50BF Activate 3I0> threshold 50BF BkrFailure LED BI (>50BFactiv.3I0>) 1431 >50BF initiated externally 50BF BkrFailure LED BI (>50BF ext SRC) 1451 50BF is switched OFF (50BF 50BF BkrFailure OFF) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 478 LED BI (>BLOCK CLP) 1731 >BLOCK Cold-Load-Pickup stop ColdLoadPickup LED BI timer (>BLK CLP stpTim) 1732 >ACTIVATE Cold-Load-Pickup ColdLoadPickup LED BI (>ACTIVATE CLP) 1751 50/51 O/C switched OFF (50/51 50/51 Overcur. PH OFF) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 479 50/51 Overcur. 1835 50N-1 Time Out (50N-1 TimeOut) 50/51 Overcur. 1836 50N-1 TRIP (50N-1 TRIP) 50/51 Overcur. 1837 51N picked up (51N picked up) 50/51 Overcur. 1838 51N Time Out (51N TimeOut) 50/51 Overcur. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 480 Ground reverse (Ground reverse) 67 Direct. O/C 2646 67N-2 picked up (67N-2 picked 67 Direct. O/C 2648 67N-2 Time Out (67N-2 Time 67 Direct. O/C Out) 2656 67N/67N-TOC switched OFF 67 Direct. O/C (67N OFF) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 481 4826 66 Motor Startup Counter 48/66/51M Motor ACTIVE (66 ACTIVE) 4827 66 Motor Startup Counter TRIP 48/66/51M Motor (66 TRIP) 4828 >66 Mot.St. Cnt:Reset 48/66/51M Motor LED BI therm.memory rotor (>66 RM th.repl.) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 482 81-2 picked up (81-2 picked up) 81 O/U Freq. 5234 81-3 picked up (81-3 picked up) 81 O/U Freq. 5235 81-4 picked up (81-4 picked up) 81 O/U Freq. 5236 81-1 TRIP (81-1 TRIP) 81 O/U Freq. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 483 >BLOCK 48 Motor Startup Time 48/66/51M Motor LED BI Supervision (>BLOCK 48) 6805 >48/14 Mot.St.Time Sup. Rotor 48/66/51M Motor LED BI locked (>48 Rot. locked) 6811 48 Motor Startup Time Supervi- 48/66/51M Motor sion OFF (48 OFF) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 484 Dir. Interm. EF LED BI prot. (>dIEF block) 6961 Dir. Interm. E/F prot. is switched Dir. Interm. EF off (dIEF OFF) 6962 Dir. Interm. E/F prot. is blocked Dir. Interm. EF LED BI (dIEF blocked) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 485 BLOCKED (Load Jam BLOCK.) 10022 Load Jam Protection is OFF 48/66/51M Motor (Load Jam OFF) 10023 Load Jam Protection is ACTIVE 48/66/51M Motor (Load Jam ACTIVE) 10024 Load Jam Protection alarm (Load 48/66/51M Motor Jam alarm) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 486 RTD 1 Temperature stage 2 RTD-Box picked up (RTD 1 St.2 p.up) 14121 Fail: RTD 2 (broken wire/shorted) RTD-Box (Fail: RTD 2) 14122 RTD 2 Temperature stage 1 RTD-Box picked up (RTD 2 St.1 p.up) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 487 (RTD10 St.2 p.up) 14211 Fail: RTD11 (broken wire/short- RTD-Box ed) (Fail: RTD11) 14212 RTD11 Temperature stage 1 RTD-Box picked up (RTD11 St.1 p.up) 14213 RTD11 Temperature stage 2 RTD-Box picked up (RTD11 St.2 p.up) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 488 Setting Error (51Ns BLK PaErr) 16030 Angle between 3Vo and INsens. Sens. Gnd Fault (ϕ(3Vo,INs) =) 30053 Fault recording is running (Fault Osc. Fault Rec. rec. run.) 31000 Q0 operationcounter= (Q0 Control Device OpCnt=) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 489 Appendix A.9 Information List Description Function Type Log Buffers Configurable in Matrix IEC 60870-5-103 of In- for- matio 31001 Q1 operationcounter= (Q1 Control Device OpCnt=) 31008 Q8 operationcounter= (Q8 Control Device OpCnt=) SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 490: A.10 Group Alarms

    64 Pickup Relay TRIP 1521 49 Th O/L TRIP 5170 46 TRIP 6821 48 TRIP 10026 Load Jam TRIP 1791 50(N)/51(N)TRIP 2696 67/67N TRIP 1226 50Ns-1 TRIP 1223 50Ns-2 TRIP 1217 64 TRIP SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 491: A.11 Measured Values

    Reactive Power Demand (Q dmd =) Demand meter Apparent Power Demand (S dmd =) Demand meter I A Demand Minimum (IAdmdMin) Min/Max meter I A Demand Maximum (IAdmdMax) Min/Max meter I B Demand Minimum (IBdmdMin) Min/Max meter SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 492 Apparent Power Maximum (Smax=) Min/Max meter Frequency Minimum (fmin=) Min/Max meter Frequency Maximum (fmax=) Min/Max meter Power Factor Maximum (PF Max=) Min/Max meter Power Factor Minimum (PF Min=) Min/Max meter Pulsed Energy Wp (active) (Wp(puls)) Energy SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 493 Power Factor, phase A (PFa =) Measurement 30708 Power Factor, phase B (PFb =) Measurement 30709 Power Factor, phase C (PFc =) Measurement 30800 Voltage VX (VX =) Measurement 30801 Voltage phase-neutral (Vph-n =) Measurement ■ SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 494 Appendix A.11 Measured Values SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 495: Literature

    SIPROTEC 4 System Description; E50417-H1176-C151-A1 SIPROTEC DIGSI, Start UP; E50417-G1176-C152-A2 DIGSI CFC, Manual; E50417-H1176-C098-A5 SIPROTEC SIGRA 4, Manual; E50417-H1176-C070-A1 Additional description for the protection of explosion-protected motors of protection type increased safety "e"; C53000–B1174–C170 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 496 Literature SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 497: Glossary

    The function prevents overloading of the system when a fault arises. Combination devices Combination devices are bay devices with protection functions and a control display. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 498 In the Component View, all SIPROTEC 4 devices are assigned to an object of type Device container. This object is a special object of DIGSI Manager. However, since there is no component view in DIGSI Manager, this object only becomes visible in conjunction with STEP 7. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 499 External command with feedback via an ETHERNET connection, device-specific ExDP External double point indication via an ETHERNET connection, device-specific → Double-point indication ExDP_I External double-point indication via an ETHERNET connection, intermediate position 00, → Double-point indi- cation SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 500 The conductive ground whose electric potential can be set equal to zero in any point. In the area of ground electrodes the ground can have a potential deviating from zero. The term "Ground reference plane" is often used for this state. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 501 IEC bus. IEC61850 Worldwide communication standard for communication in substations. This standard allows devices from dif- ferent manufacturers to interoperate on the station bus. Data transfer is accomplished through an Ethernet net- work. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 502 The right pane of the project window displays the names and icons of objects which represent the contents of a container selected in the tree view. Because they are displayed in the form of a list, this area is called the list view. Limit value Limit value, user-defined SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 503 The left pane of the project window displays the names and symbols of all containers of a project in the form of a folder tree. Object Each element of a project structure is called an object in DIGSI. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 504 Content-wise, a project is the image of a real power supply system. Graphically, a project is represented by a number of objects which are integrated in a hierarchical structure. Physically, a project consists of a series of folders and files containing project data. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 505 / remote terminal units. SICAM Station Unit The SICAM Station Unit with its special hardware (no fan, no rotating parts) and its Windows XP Embedded operating system is the basis for SICAM PAS. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 506 Transient information A transient information is a brief transient → single-point indication at which only the coming of the process signal is detected and processed immediately. SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 507 SIPROTEC 4 device in order to allow communication with DIGSI Device Editor. A VFD (Virtual Field Device) includes all communication objects and their properties and states that are used by a communication user through services. Value Indication SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 508 Glossary SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 509: Index

    Circuit breaker monitoring 411 Frequency protection 388 Climatic Stress Tests 357 Function blocks 403 Clock 412 Fuse failure monitor 169 Commissioning aids 412 Communication interfaces 352 Constructive designs 358 Coolant temperature 155 Cross Blocking 73 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 510 Load jam protection 387 Reverse Interlocking Busbar Protection 76 Local measured value monitoring 410 Rotor Overload Detection 135 Long-term mean values 409 RTD-Box 324 Malfunction responses of monitoring equipment 182 Measured value monitoring 164 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 511 Trip circuit supervision 178, 411 Trip/Close Tests for the Configured Operating Devices 346 Tripping Logic 259 Tripping Test with Circuit Breaker 346 Two-phase overcurrent protection 76 Underfrequency 150 Undervoltage Consideration 69 User interface 352 User-defined functions 403 SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...
  • Page 512 Index SIPROTEC, 7SK80, Manual E50417-G1140-C344-A5, Release date 11.2012...

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