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Siemens SIPROTEC 7SS60 Manual

Centralized numerical busbar protection
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SIEMENS
SIPROTEC 7SS60
V3.1
Centralized Numerical Busbar Protection
E50417-G1176-C132-A2

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  • Page 1 SIEMENS SIPROTEC 7SS60 V3.1 Centralized Numerical Busbar Protection E50417-G1176-C132-A2...
  • Page 3 ,QWURGXFWLRQ 'HVLJQ DQG &RQQHFWLRQ 6\VWHP *HWWLQJ 6WDUWHG SIPROTEC &RQILJXUDWLRQ Centralized Numerical Busbar Protection )XQFWLRQV 7SS60 &RQWURO LQ 2SHUDWLRQ Manual ,QVWDOODWLRQ DQG &RPPLVVLRQLQJ 0DLQWHQDQFH DQG 7URXEOHVKRRWLQJ 7HFKQLFDO 'DWD $SSHQGL[ E50417-G1176-C132-A2...
  • Page 4 Siemens Aktiengesellschaft Document No. E50417-G1176-C132-A2...
  • Page 5 (EMC Council Directive 89/336/EEC) and concerning electrical equip- ment for use within specified voltage limits (Low-voltage directive 73/23 EEC). Conformity is proved by tests conducted by Siemens AG in accordance with Article 10 of the Council Directive in agreement with the generic standards EN 50081 and EN 50082 (for EMC directive) and the standards EN 60255-6 (for low-voltage directive).
  • Page 6 Preface Instructions and The warnings and notes contained in this manual serve for your own safety and for an warnings appropriate lifetime of the device. Please observe them! The following terms and definitions are used: DANGER indicates that death, severe personal injury or substantial property damage will result if proper precautions are not taken.
  • Page 7 SIPROTEC, SINAUT, SICAM und DIGSI are registered trademarks of SIEMENS AG. All other product and brand names in this manual may be The contents of this manual is subject to change without trademarks, the use of which by third persons for their purposes may in- prior notice.
  • Page 8 Preface 7SS60 Manual E50417-G1176-C132-A2...

  • Page 9: Table Of Contents

    Contents Introduction............................1-1 Overall function ........................1-2 Application scope ........................ 1-6 Features ..........................1-8 Design and Connection System ...................... 2-1 7SS601 measuring system....................2-2 Peripheral modules......................2-4 Getting Started ..........................3-1 Unpacking and repacking of devices and modules ............. 3-2 Incoming inspection of devices and modules ..............
  • Page 10 Contents 4.2.3.5 Marshalling of the command (trip) relays................4-12 4.2.4 Serial interface........................4-13 4.2.4.1 Function description......................4-13 4.2.4.2 Hints on setting ........................4-13 4.2.4.3 Overview of parameters..................... 4-14 4.2.5 Setting of date and time..................... 4-15 4.2.5.1 Function description......................4-15 4.2.5.2 Hints on setting ........................
  • Page 11 Contents Installation and Commissioning ..................... 7-1 Installation and connection ....................7-2 7.1.1 Measuring system ....................... 7-2 7.1.2 Peripheral modules......................7-3 Commissioning ........................7-5 7.2.1 Checking the connection circuit................... 7-6 7.2.1.1 Infeed circuits of the protection.................... 7-6 7.2.2 Check of the complete protection system with operating currents ........7-8 7.2.2.1 Directional check of the input currents ................
  • Page 12 Contents Appendix............................A-1 Ordering data and accessories....................A-2 Block diagram - Measuring system..................A-5 Block diagrams - Peripheral modules ..................A-6 Jumper settings for the measuring system ................A-9 Jumper settings for the peripheral modules...............A-11 Operating tree........................A-14 Overview of parameters ....................A-19 List of information ......................A-20 viii 7SS60 Manual E50417-G1176-C132-A2...

  • Page 13: Introduction

    Introduction The SIPROTEC 7SS60 device is introduced in this chapter. An overview of the appli- cation and characteristics of the 7SS60 is given. Overall function Application scope Features 7SS60 Manual E50417-G1176-C132-A2...

  • Page 14: Overall Function

    Introduction Overall function Measuring The main function of the 7SS60 protection system is a busbar protection that operates principle with the differential current measuring principle. The algorithm of the 7SS60 relies on Kirchhoff’s current law, which states that in fault-free condition the vectorial sum ∆I flowing into a closed busbar section must be zero.
  • Page 15 Introduction Functional The 7SS60 digital busbar protection has two separate functional parts. One part is the components 7SS601 measuring system. The measuring system detects and processes the mea- sured values. It evaluates the restraint current I and the differential current I makes a tripping decision where required.
  • Page 16 Introduction Isolator replica This module can be used to implement 2 different functions which will be presented in module/preferential the following. treatment module Isolator replica The isolator replica function detects the status of 2 isolators. It allows e.g. to recognize the status of both isolators in a double busbar system. The isolator status determines the allocation of the feeder currents to the appropriate mea- suring system.
  • Page 17 Introduction Wiring The 7SS60 busbar protection system is suited for a large variety of power systems, from single busbar configurations without sectionalizing isolators to double busbars with sectionalizing isolators and transversal couplers. The summation currents I are distributed among the measuring systems by relay modules that provide for connection of nearly all relay contacts to connecting points.

  • Page 18: Application Scope

    Introduction Application scope The 7SS60 busbar protection is an easily settable numerical differential current pro- tection for busbars. It is suitable for all voltage levels and can be adapted to a large variety of busbar con- figurations. The components available are designed in particular for: •...
  • Page 19 Introduction BB1A BB1B Figure 1-4 Single busbar with sectionalizing isolator BB1A BB1B BB2A BB2B Figure 1-5 Double busbar with sectionalizing isolator and two transversal couplers 7SS60 Manual E50417-G1176-C132-A2...

  • Page 20: Features

    Introduction Features The 7SS60 busbar protection has the following features: • Busbar protection operating on the differential current principle; one measuring sys- tem per busbar section or, depending on the configuration, per phase and zone; op- tionally one additional measuring system for the check zone (isolator-independent measuring system) •...

  • Page 21: Design And Connection System

    Design and Connection System This chapter describes the design and the connection system of the 7SS60. You will find information on the available housing variants and on the types of connections used. This chapter also specifies recommended and reliable wiring data as well as suitable accessories and tools.

  • Page 22: 7Ss601 Measuring System

    An earthing area marked with an earth symbol has been provided at the housing rear. At this area an earthing strip must be connected with two earthing screws in order to ensure solid low-impedance earthing. SIEMENS Service/ Betrieb Blocked/ Störung...
  • Page 23 Design and Connection System Connection system Current connections (terminals 1 to 6) Screw terminals (ring-type cable lug) for bolts of 6 mm max. outside diameter 13 mm Type e.g. PDIG of Messrs. Tyco Electronics AMP for conductor cross-sections of 2.7 to 6.6 mm AWG 12 to 10 in parallel double leaf-spring-crimp contact 2.5 to 4.0 mm...

  • Page 24: Peripheral Modules

    At this area an earthing strip must be connected with two earthing screws in order to ensure solid low-impedance earthing. In addition, the housing bears a rating sticker with basic information. SIPROTEC SIEMENS 7SS60 Pos. Module Figure 2-2 Front view (left) and rear view (right) of the 7XP204 housing for peripheral modules The connector allocation depends on the type of peripheral module and is shown in section A.2.
  • Page 25 Design and Connection System Connection system Each peripheral module is delivered with 8 plug-on connectors with screw terminals and strain relief. Connectors with screw terminals Type COMBICON system of Messrs. PHOENIX CONTACT MSTB 2,5/10-STZ-5,08 for conductor cross-sections of 0.2 to 2.5 mm (rigid and flexible) AWG 24 to 12 0.25 to 2.5 mm...
  • Page 26 Design and Connection System Mounting slots peripheral modules Self-adhesive Labels Figure 2-3 Example showing the labelling of the plug-on connectors. Mounting slots peripheral modules Slot A Slot C Slot B Slot D Figure 2-4 Mounting slots for the peripheral modules in the 7XP204 housing (front view) The module guiding grooves are marked.

  • Page 27: Getting Started

    Getting Started This chapter describes the first steps that you should take after receiving your SIPROTEC 7SS60 devices and modules. After unpacking, please check whether the version and rated data match your requirements. For an electrical check, you can navigate in the user interface without any measured values.

  • Page 28: Unpacking And Repacking Of Devices And Modules

    Getting Started Unpacking and repacking of devices and modules The devices and modules are packed in the factory such that the requirements of IEC 60255-21 are fulfilled. Unpacking and repacking must be performed with the usual care, without force and only with the aid of suitable tools.

  • Page 29: Incoming Inspection Of Devices And Modules

    Getting Started Incoming inspection of devices and modules 3.2.1 Check of the rated data Ordering code First of all, check the complete ordering code (MLFB) of the units and modules to en- sure that the versions delivered comply with the required rated data and functions, and that the necessary and desired accessories are complete.
  • Page 30 Getting Started 7SS601 Connect the earth of the device to the protective earth of the location. Units for cu- measuring system bicle or panel flush mounting have the earthing screws on their back. The green Service/Betrieb LED on the front plate must light after at most 0.5 s, and the red Blocked/Störung LED must go off after at most 10 s.

  • Page 31: User Interface

    It is also possible to operate the system from a PC that is connected to the serial interface. Membrane keypad/ Figure 3-1 shows a front view of the 7SS601 measuring system. display panel SIEMENS “Ready” LED (greed) Service/ Betrieb Blocked/ Störung...

  • Page 32: Operation From A Pc

    Getting Started YES/NO keys: YES key: Operator confirms the displayed question NO key: Operator negates the displayed question. This key is also used to reset memorized LED indications and fault alarms. Keys for scrolling in the display: Forward scrolling: the display shows the next operating position of the same operation level Backward scrolling: the display shows the previous operating position of the same operation level...

  • Page 33: Operating Prerequisites

    Getting Started 3.3.3 Operating prerequisites For most operational functions, the input of a password is necessary. This applies to all entries via operator keypad or user interface which concern the functions of the 7SS601 measuring system, such as: • setting of operational parameters (thresholds, functions), •...

  • Page 34: Storage

    Getting Started Storage If units or modules are to be stored, the following storage conditions should be ob- served: SIPROTEC devices and modules should be stored in dry and clean rooms. For stor- age of devices, peripheral modules or related spare modules the applicable tempera- ture range is between –25 °C and +55 °C (refer also to section 9.1 under Technical Data).

  • Page 35: Configuration

    Configuration The configuration of the SIPROTEC 7SS60 device comprises two parts. The first part includes the selection and interconnection of the necessary components according to the station configuration. The system configuration is dealt within a sep- arate document. This chapter tells you, from the example of a single-busbar station with sectionalizing isolator, which components you need to perform what tasks.

  • Page 36: Designing A System Configuration

    Configuration Designing a system configuration The following example of a single-busbar station with longitudinal sectionalizers shows you the functions that are assumed by the individual modules. Figure 4-1 Example of a single busbar with longitudinal sectionalizers and summation current transformers 7SS60 Manual E50417-G1176-C132-A2...
  • Page 37 Configuration For the above example you need the following: • Two 7SS601 measuring systems: These are needed for the detection and evaluation of the differential and restraint currents. • One 7TM70 restraint/command output module: 3 of the 5 restraint units are used for the formation of restraint currents. Also 3 of the 5 independent TRIP command relays are used with 2 NO contacts each for mul- tiplication of TRIP commands generated by the 7SS601 measuring system.

  • Page 38: Configuration Of The Measuring System

    Configuration Configuration of the measuring system Note: If the protection is operated from a personal computer using the DIGSI communication software, the test addresses are identified by a four-digit number. This number will be stated in brackets in the section below. 4.2.1 Entering a password For most operational functions, the input of a password is necessary.

  • Page 39: Changing The Operating Language

    Configuration 4.2.2 Changing the operating language 4.2.2.1 Function description The operating language can be changed in the parameter  /$1*8$ (). The Block 71 available operating languages are currently English and German. When the system is delivered from the factory, the display shows function names and outputs in the English language.
  • Page 40 Configuration Note: Annunciation of previous events can be lost during marshalling. Therefore, the oper- ational and the fault annunciation buffer should be read out before alterations are made later on. Before you begin with the marshalling procedure, you should have a concept that matches the required input and output information to the number of physically avail- able inputs and outputs of the device.
  • Page 41 Configuration the next input, output or LED position. In the display the physical input/output unit forms the heading. leads to the 5th level, in which the logical functions are actually selected for assignment. The display shows, in the upper line, the physical input/output unit, this time with a one to two digit index number.

  • Page 42: Marshalling Of The Binary Inputs

    Configuration In the following paragraphs, allocation possibilities for binary inputs, binary outputs and LED indicators are given. The function numbers and designations are listed com- pletely in the Appendix A.7. If one tries to leave an item or operation level by pressing one of the arrow keys with- out having confirmed the allocation with the enter key E, the display will show the question “6$9( 1(: 6(77,1* "”.

  • Page 43: Marshalling Of The Signal Relays

    Configuration The assignment of the binary inputs as delivered from the factory is shown in the block diagram in Appendix A.2. Table 4-3 shows all binary inputs as preset from the factory. . Table 4-2 Marshallable binary input functions FNo. Text on the LC display Logical functions not all.
  • Page 44 Configuration If a selection place is to be assigned to physical unit, selection is made with the func- tion QRW DOO (not allocated). Leave the selection level for signal relay 1 with key . You can then go to the next signal relay with the arrow key Note on Table 4-4: Annunciations which are indicated by a leading “!µ...

  • Page 45: Marshalling Of The Led Indicators

    Configuration 4.2.3.4 Marshalling of the LED indicators Block 63 The unit contains 6 LEDs for optical indications, 4 of which can be marshalled. They are designated LED 1 to LED 4 and can be marshalled in address block . The block is reached from the initial display in level 1 as follows: press the key (forwards), move to the 2nd operation level by key...

  • Page 46: Marshalling Of The Command (Trip) Relays

    Configuration 4.2.3.5 Marshalling of the command (trip) relays Block 64 The unit contains 2 command relays with tripping capability which are designated CMD.RE 1 and CMD.RE 2. Command relay CMD.RE 2 can be marshalled in the ad- dress block . The block is reached from the initial display in level 1 as follows: press the key (forwards), move to the 2nd operation level by key (next level);...

  • Page 47: Serial Interface

    In the parameter  3&6( () the data format of the serial interface can be Data format matched to the application. The recommended data format for the Siemens protection data processing program is ',*6, 9. The other setting option is $6&,,, e.g. for ter- minal programs.
  • Page 48 Configuration In the parameter  %$8' () the baud rate for serial transmission can be Baud rate changed. The baud rate can be selected by repeatedly pressing the key “+” or “²”. Character format The format for the characters transmitted in a telegram can be set in parameter 3$5,7<...

  • Page 49: Function Description

    Configuration 4.2.5 Setting of date and time 4.2.5.1 Function description The date and time should not be set until the device is finally installed and connected to the supply voltage, because an outage of the auxiliary voltage resets the clock. The address block for this setting is reached from the initial display.
  • Page 50 Configuration 4-16 7SS60 Manual E50417-G1176-C132-A2...

  • Page 51: Functions

    Functions This chapter explains the various functions of the SIPROTEC 7SS60 and shows the setting possibilities for each function. It also gives information and - where required - formulae for determination of the setting values. Measurement method Formation of measuring currents from the transformer currents...

  • Page 52: Measurement Method

    Functions Measurement method Basic principle The measurement method by which the 7SS60 numerical busbar protection detects a short-circuit in the protected zone relies on Kirchhoff’s current law. This law states that the vectorial sum of all currents flowing into a closed area must be zero. Figure 5-1 Busbar with n feeders Assuming that the currents J...
  • Page 53 Functions Figure 5-2 Differential protection of a busbar with n feeders, 1-phase, without restraining devices For simplicity’s sake, it is assumed that the current transformers of all feeders have the same transformation ratio. Although such a busbar protection would certainly detect any short-circuit inside the protection zone, the transformation errors of the current transformers, which are unavoidable to some degree, are also liable to cause spurious tripping as a result of an external short-circuit.
  • Page 54 Functions Basic circuit, The simple circuit shown in Figure 5-2 is sufficient to derive the sum of all feeder supervision currents in one phase, provided that the current transformers of all feeders have the same transformation ratio. In most cases, however, the current transformers of the feeders in a power system will have different transformation ratios because the incoming and outgoing lines carry different rated currents and the transformers are matched to these currents.
  • Page 55 Functions Restraint The restraint (stabilization) has the function of reducing the influence on the measurement of transformation inaccuracies (e.g. for transformer saturation) in the various feeders to such a degree that spurious behaviour of the protection system is prevented. The vectorial sum I of all feeder currents acts as tripping quantity.
  • Page 56 Functions An even higher degree of safety can be achieved by using separate transformer cores for the check zone. To avoid over-restraint, address N IDF  in the check zone measuring sys- tem has to be a lower level (see Subsection 5.4.2). 7SS60 Manual E50417-G1176-C132-A2...

  • Page 57: Formation Of Measuring Currents From The Transformer Currents

    Functions Formation of measuring currents from the transformer currents The output currents used by the busbar protection for the current comparison are the secondary currents supplied by the feeder transformers. They are, however, not fed directly into the measuring circuit but first transformed by means of matching CTs. In the following the reasons are explained: •...
  • Page 58 Functions The following sections deal with circuit examples for the version with summation current transformers. The input current transformer (“summation current transformer”) has several primary windings and one secondary winding. The primary windings have different numbers of turns, which allows to connect the three phase currents with a ratio of e.g. 2 : 1 : 3. Depending on the station operating conditions and the requirements that the protection must meet, there are two different circuits for connecting the summation current transformer to the main transformers.
  • Page 59 Functions Figure 5-6 Connection circuit of the summation current transformer for increased earth current sensitivity Effective number of windings in turn Figure 5-7 Vector diagram for 3-phase faults Short-circuit Affected phases Effective number Fault detection range of turns Multiple of I √3 3-phase L1–L2–L3...
  • Page 60 Functions For a better understanding of this, Figure 5-8 shows the distribution of the currents between the three phase conductors and the earth conductor on the line from the supply transformer to the earth-faulted busbar and on the line between the busbar and an earthed transformer.
  • Page 61 Functions Normal earth In a connection circuit as shown in Figure 5-10, the sensitivity to the earth current is current sensitivity less pronounced than in the circuit shown in Figure 5-6. It should be considered for power systems with low-resistant or solid earthing of the starpoints where due to the transformer design sufficiently high short-circuit currents can be expected in case of 1-phase earth faults.
  • Page 62 Functions This circuit yields the following conditions in the differential measuring circuit for power systems with earthing only on the consumer side: Phase Trip value Restraint value 0 + 6 0 + 6 6/6 = 1.0 –3 + 6 3 + 6 3/9 = 0.33 3 + 6 3 + 6...
  • Page 63 Functions Matching For the phase-selective differential current busbar protection, matching transformers transformers of the types 4AM5120-1DA00-0AN2 (Figure 5-14) for connection to transformers with a rated secondary current of 1 A and 4AM5120-2DA00-0AN2 (Figure 5-16) for connection to transformers with a rated secondary current of 5 A are used. These matching transformers have one secondary winding with a rated current of 100 mA, but six input windings for connection to the main current transformers.

  • Page 64: Power System And Switchgear Data - Block 01

    Functions Power system and switchgear data − Block 01 Note: If the protection is operated from a personal computer using the DIGSI communication software, the test addresses are identified by a four-digit number. This number will be stated in brackets in the section below. 5.3.1 Function description The 7SS601 measuring system requires some basic data of the power system and the...

  • Page 65: Hints On Setting

    Functions 5.3.2 Hints on setting The default setting is  +]; it needs to be changed only for a system frequency of Rated system  +]. frequency 16.7 Hz are available in a version with separate order no. Note: The parameter  )5(4 () can only be called up in versions for 50 Hz or 60 Hz. In systems with a rated frequency of 16.7 Hz, the parameter  )5(4 () is not displayed at all.

  • Page 66: Busbar Protection

    Functions Busbar protection 5.4.1 Function description The busbar protection function generates the TRIP command that is then multiplied by means of peripheral modules to enable the output to all tripping circuit breakers. It makes the r.m.s. values of the differential current I and of the restraint current I available for display, stores events in the form of operational annunciations, fault annunciations or spontaneous annunciations and outputs these via LED indicators or...
  • Page 67 1501 10 BPStat 1802 13 Id sup 10 Id> 1506 10 K fac 1505 7911 BP act. Id sampl. values TRIP command Open fault buffer Busbar protection IR sampl. values Create fault record algorithm Blocking of TRIP command Blocking via binary input 1511 10 T Trip Diff-current...

  • Page 68: Hints On Setting

    Functions 5.4.2 Hints on setting The parameter %3VWDW () is used to activate (21) or deactivate (2))) the Busbar protection busbar protection function. It can also be set to block the command and signal relays while the protection function is active (%/2753). Pick-up value for For fault detection and tripping the protection only uses the normalized currents I which exceed the threshold set in ,G! ().

  • Page 69: Annunciations

    Functions Check zone protection Condition Setting of 10 K fac (1506) none 5.4.3 Overview of parameters DIGSI Parameter Possible settings Default setting Explanation addr. 1501 10BUSBAR Busbar protection function PROTECT. BLO.TRP 1505 10Id> Threshold for differential current 0.2 I to 2.50 I 1.00 I 1506 10K fac...

  • Page 70: Hints On Setting

    Functions Differential current supervision − Block 13 5.5.1 Function description The 7SS60 also allows to supervise the external transformer circuits. The supervision picks up when the threshold ,G WKU () is exceeded. This response comes with a delay after the protection function. The differential current supervision function is available in block 13.

  • Page 71: Overview Of Parameters

    Functions 5.5.3 Overview of parameters DIGSI Parameter Possible settings Default setting Explanation addr. 1801 13Id Sup bl/relBP bl/relBP Differential current supervision bl/ackBP function ALRMonly 1802 13Id thr Threshold of differential current 0.10 I to 1.00 I 0.15 I supervision : normalized rated current; I =100 mA with a symmetrical rated current flowing on the primary side 5.5.4 Annunciations...
  • Page 72 Functions Fault recording − Block 74 5.6.1 Function description The 7SS601 protection system has a fault recording function that stores the instantaneous values of the differential and the restraint current in a buffer. This function is available in block . The instantaneous values of the measured quantities are sampled every 0.5 ms (50, 60 and 16.7 Hz).

  • Page 73: Control In Operation

    Control in Operation This chapter deals with the control of the SIPROTEC 7SS60 system while it is in op- eration. It describes how to obtain information from the system, to set the date and time and to check the status of the binary inputs.

  • Page 74: Read-Out Of Information

    Control in Operation Read-out of information General The device provides the following information for local readout or for transmission to DIGSI: • Operational annunciations • Fault annunciations • Measured values The following section describes in detail how this information is called up, and explains the individual items of information.
  • Page 75 Control in Operation Read-out using the The procedure for reading out the operational and fault annunciation buffer and the DIGSI measured values using the DIGSI communication software is described in the manual communication for the communication software. software From the initial state, the block $1181& () is reached by pressing the Readout using the integrated keypad twice.
  • Page 76 Control in Operation Annunciation buffer    PV Display )$8/7  PV )7 GHW  PV ',) 7US Faults in the primary switchgear are indicated only with “Fault” and a consecutive fault number. Detailed information on the sequence of events during a fault is contained in the block “Fault annunciations”.

  • Page 77: Read Out Of The Date And Time

    Control in Operation Read out of the date and time The relevant block is accessed from the initial state of the device. Pressing the three times brings you to the block $'',7,21 )81&7,21. Move to the block 7,0( 6(77,1* in the next operation level by pressing the key.

  • Page 78: Testing The Status Of The Binary Inputs/Outputs

    Control in Operation Testing the status of the binary inputs/outputs The 7SS60 differential protection includes a testing program that allows to check and display the status of the binary inputs and outputs. If the protection is operated from a personal computer using the DIGSI communication software, the test addresses are identified by a four-digit number.
  • Page 79 Control in Operation to move to the address for testing the status of the LEDs /(' 67$786 Testing the LEDs Press (). After actuating the ENTER key E you are asked whether you want to interrogate the status of the LEDs. If you press the N key, the action is aborted, and you can move to the next test item with If you actuate Y/J, the status of the 4 LEDs is shown as a matrix which has the follow- ing meaning:...
  • Page 80 Control in Operation 7SS60 Manual E50417-G1176-C132-A2...

  • Page 81: Installation And Commissioning

    Installation and Commissioning This section is primarily for personnel who are experienced in installing, testing, and commissioning protective and control systems, and are familiar with applicable safety rules, safety regulations, and the operation of the power system. Some modifications of the hardware to the station data may be necessary. For primary tests, the switch- gear must be isolated to perform switching operations.

  • Page 82: Installation And Connection

    Installation and Commissioning Installation and connection Warning! Trouble free and safe use of this SIPROTEC device depends on proper transport, storage, installation, and application of the device according to the warnings in this in- struction manual. Of particular importance are the general installation and safety regulations for work in a high-voltage environment (for example, ANSI, IEC, EN, DIN, or other national and international regulations.) These regulations must be observed.

  • Page 83: Peripheral Modules

    Installation and Commissioning To increase the pick-up threshold of a binary input to approx. 74 V, one jumper posi- tion per input must be changed. Figure A-5 shows the assignment of the jumpers to the binary inputs, and their location on the p.c.b. Slip away the covering caps at the top and bottom of the front panel, making acces- sible one screw each in the top and bottom center.
  • Page 84 Installation and Commissioning Auxiliary voltage Both the 7TM70 restraint/command output module and the 7TS720 command output module have three input voltage ranges for the auxiliary voltage: 48/60 Vdc, 110/ 125 Vdc and 220/250 Vdc (refer to Chapter 9 and Appendix A.5). The voltage range can be selected by changing the jumper settings on the module.

  • Page 85: Commissioning

    Installation and Commissioning Commissioning Warning! Hazardous voltages are present in this electrical equipment during operation. Non– observance of the safety rules can result in severe personal injury or property dam- age. Only qualified personnel shall work on and around this equipment after becoming thor- oughly familiar with all warnings and safety notices of this manual as well as with the applicable safety regulations.

  • Page 86: Checking The Connection Circuit

    Installation and Commissioning 7.2.1 Checking the connection circuit The busbar protection is delivered in individual components. The configuration, wiring and testing of the system has to be made specifically to match the station conditions. Note: The wiring of the relays on the individual peripheral modules depends on the polarity. Therefore, the wiring must be checked against the block circuit diagrams in Appendix A.3.
  • Page 87 Installation and Commissioning In models with a summation current transformer input, this measurement does not check that the summation current transformer winding that lies in the residual current path is correctly connected. With a symmetrical current and if all devices are correctly connected, the residual current flowing in the neutral conductor is practically zero, so that an interruption or polarity reversal in that circuit is not detected.

  • Page 88: Check Of The Complete Protection System With Operating Currents

    Installation and Commissioning 7.2.2 Check of the complete protection system with operating currents 7.2.2.1 Directional check of the input currents When checking the connection circuits, one prerequisite for a correct comparison of the currents of all feeders was a uniform (normalized) transformation ratio between the primary currents from the main current transformers and the secondary currents from the summation current transformers or matching transformers, which were the basis for the measurement.

  • Page 89: Maintenance And Troubleshooting

    Maintenance and Troubleshooting This chapter describes the maintenance procedures that are necessary and recom- mended to ensure the continuous reliability of the SIPROTEC 7SS60 protection sys- tem. It tells you which components should be checked and/or replaced on a routine basis and what to do in case of malfunctions of the device.

  • Page 90: General

    Maintenance and Troubleshooting General 7SS601 measuring The 7SS601 measuring system requires no special maintenance. system As the 7SS601 measuring system is almost completely self-monitored, hardware and software faults are automatically annunciated. This ensures the high availability of the system. With detected hardware faults the system blocks itself; drop-off of the “Device ready” NC relay signals the equipment fault.

  • Page 91: Routine Checks

    Maintenance and Troubleshooting Routine checks Routine checks of characteristics or pick-up values are not necessary as they are part of the continuously supervised firmware programs. The planned maintenance inter- vals for checking and maintenance of the plant can be used to perform operational tests of the protection equipment.

  • Page 92: Troubleshooting

    Maintenance and Troubleshooting Troubleshooting 8.3.1 7SS601 measuring system If the device indicates a defect, the following procedure is recommended: If none of the LEDs on the front panel of the device is on, then check: Has the module been properly pushed in and locked? Is the auxiliary voltage available with the correct polarity and of adequate magni- tude, connected to the correct terminals (block circuit diagrams are given in Appen- dix A.2 and A.3)?

  • Page 93: Peripheral Modules

    Maintenance and Troubleshooting 8.3.2 Peripheral modules A general detailed testing specification cannot be given. Please observe the plans for the switchgear and the block diagrams of the peripheral modules given in Appendix A.3. 7SS60 Manual E50417-G1176-C132-A2...

  • Page 94: Repair/Return

    Maintenance and Troubleshooting Repair/Return It is recommended to refrain strictly from repairing units or modules, because they contain especially selected components, which must be handled according to the reg- ulations for EED (electrostatic endangered devices). In the first place, special tech- niques are required for working with the printed circuit boards, so that the flow-sol- dered boards and sensitive components are not damaged.

  • Page 95: Technical Data

    Technical Data This chapter describes the technical specifications of the SIPROTEC 7SS60 protection system and of its functions, including limits that may on no account be exceeded. The electrical and functional data for the maximum scope of functions are followed by the mechanical data and the dimension drawings.

  • Page 96: General Data

    Technical Data General data 9.1.1 7SS601 measuring system Measuring input I Rated current 100 mA Rated frequency 50/60 Hz can be set, 16.7 Hz Dynamic overload capability 250 x I one half cycle (pulse current) for ≤ 1 s Thermal overload capability (rms) 100 x I for ≤...
  • Page 97 Technical Data Binary inputs Number 3 (can be marshalled) Operating voltage range 24 to 250 Vdc Current consumption when energized approx. 2.5 mA independent of operating voltage can be changed by setting jumpers Pick-up threshold rated aux. voltage 48/60 Vdc ≥...
  • Page 98 Technical Data Housing Housing 7XP20, 19" Dimensions see Figure 9-1 Weight approx. 4.0 kg Degree of protection according to IEC 60529-1 for the device IP 51 for operator protection IP 2X Differential current Setting ranges for pick-up threshold protection Differential current I >...

  • Page 99: Peripheral Modules

    Technical Data 9.1.2 Peripheral modules 9.1.2.1 7TM700 restraint/command output module Measuring input I Number of restraint units Rated current 100 mA Rated frequency 16.7Hz, 50 Hz, 60 Hz Dynamic overload capability 250 x I one half cycle (pulse current) for ≤ 1 s Thermal overload capability (rms) 100 x I for ≤...

  • Page 100: 7Tr710 Isolator Replica Module/Preferential Treatment Module

    Technical Data 9.1.2.2 7TR710 isolator replica module/preferential treatment module Note: The functions isolator replica or preferential treatment are alternatively available. Isolator replica Number of feeders (single busbar and double busbar) Number of isolators (per 1 auxiliary contact) per feeder Preferential Number of preferential treatment circuits 2 treatment Number of contacts per pref.

  • Page 101: 7Ts720 Command Output Module

    Technical Data 9.1.2.3 7TS720 command output module Auxiliary voltage Rated auxiliary voltageU 48/60 Vdc (38 to 72 Vdc) (permissible voltage range) 110/125 Vdc (88 to 150 Vdc) 220/250 Vdc (176 to 300 Vdc) settable, see Figure A-8 as delivered: 220/250 Vdc Power Rated auxiliary voltage max.

  • Page 102: Matching Transformers

    Technical Data 9.1.4 Matching transformers 4AM5120-1DA00-0AN2 for connection to current transformers with a rated current I Rated frequency f 45-60 Hz Winding Number of turns Max. current, continuous 0.85 Max. voltage 12.8 4AM5120-2DA00-0AN2 for connection to current transformers with a rated current I Rated frequency f 45-60 Hz...

  • Page 103: Summation Current Matching Transformer

    Technical Data 9.1.5 Summation current matching transformer 4AM5120-3DA00-0AN2 for connection to current transformers with a rated current I Rated frequency f 45-60 Hz Winding Number of turns Max. current, 0.85 continuous Max. voltage 14.4 4AM5120-4DA00-0AN2 for connection to current transformers with a rated current I Rated frequency f 45-60 Hz...

  • Page 104: Electrical Tests

    This conformity is proved by tests conducted regulations the Council of the European Communities by Siemens AG in accordance with Article 10 on the approximation of the laws of the of the Council Directive in agreement with the member states relating to electromagnetic...
  • Page 105 Technical Data High-energy pulse Auxiliary voltage Longitudinal test 2 kV; 12 Ω; 9 µF (SURGE), IEC 61000-4-5, installation Transversal test 1 kV; 2 Ω; 18 µF class 3 Measuring inputs, binary inputs and relay outputs: Longitudinal test: 2 kV; 42 Ω; 0.5 µF Transversal test: 1 kV;...

  • Page 106: Mechanical Tests

    Technical Data Mechanical tests Vibration and shock Vibration during operation IEC 60255-21-1, class II sinusoidal 10 to 60 Hz, ±0.075 mm amplitude IEC 60255-21-1 IEC 60068-2-6 IEC 60068-2 60 to 150 Hz; 1 g acceleration sweep rate 1 octave/min 20 cycles in 3 orthogonal axes Shock half sinusoidal IEC 60255-21-2, class I...

  • Page 107: Climatic Stress Test

    Technical Data Climatic stress test Climatic stress test Permissible ambient temperature EN 60255-6 in service -20 to +45 °C IEC 60255-6 for storage -25 to +55 °C during transport -25 to +70 °C Storage and transport with standards works packing mean value per year ≤...

  • Page 108: Service Conditions

    Technical Data Service conditions The relay is designed for use in industrial environment, for installation in standard relay rooms and compartments so that with proper installation electro-magnetic compatibility (EMC) is ensured. the following should also be heeded: • All contactors and relays which operate in the same cubicle or on the same relay panel as the digital protection equipment should, as a rule, be fitted with suitable spike quenching elements.

  • Page 109: Dimensions

    Technical Data Dimensions Measuring system 29.5 Mounting plate 5 or Rear view ± 0.3 56.5 Side view Dimensions in mm Panel cutout Figure 9-1 Housing 7XP20 of the 7SS601 measuring system for panel or cubicle flush mounting 9-15 7SS60 Manual E50417–G1176–C132–A2...
  • Page 110 Technical Data Peripheral module dependent on min. bending housing radius of the used wires 29.5 Mounting plate Side view Rear view 5 or M4 Dimensions in mm ± 0.5 13.2 ± 0.3 206.5 Panel cutout Figure 9-2 Housing 7XP204 of the peripheral modules for panel or cubicle flush mounting 9-16 7SS60 Manual E50417–G1176–C132–A2...
  • Page 111 Technical Data Matching transformers / Summation current matching transformers Dimensions in mm 102.5 4AM5120-1DA00-0AN2 4AM5120-2DA00-0AN2 4AM5120-3DA00-0AN2 4AM5120-4DA00-0AN2 Figure 9-3 Matching transformers and summation current matching transformers 9-17 7SS60 Manual E50417–G1176–C132–A2...
  • Page 112 Technical Data 9-18 7SS60 Manual E50417–G1176–C132–A2...

  • Page 113: Appendix

    Appendix This appendix is mainly a reference for experienced users. It contains ordering infor- mation, general diagrams and connection diagrams, and tabular listings of all settings and system data for the full scope of device functions. Ordering data and accessories Block diagram - Measuring system Block diagrams - Peripheral modules Jumper settings for the measuring system...

  • Page 114: Ordering Data And Accessories

    Appendix Ordering data and accessories Table A-1 Selection and ordering data Order No. Measuring system 7SS601 – – Rated current/frequency 100 mA, ac 50, 60 Hz 100 mA, ac 16.7 Hz Rated auxiliary voltage of converter 24 Vdc to 48 Vdc 60 Vdc to 125 Vdc 220 Vdc to 250 Vdc, 115 Vac Mechanical design...
  • Page 115 Appendix Order No. Command output module 7TS720 – – Rated auxiliary voltage 48 Vdc, 60 Vdc / 110 Vdc, 125 Vdc / 220 Vdc, 250 Vdc settable Order No. Housing for peripheral modules 7XP204 – – 7SS60 Manual E50417-G1176-C132-A2...
  • Page 116 Appendix Accessories Order No. Copper cable between PC (9-pin female connector) and converter/protection device 7XV5100-2 RS232 - RS485 converter with power supply unit for 230 Vac 7XV5700-0AA0 with power supply unit for 110 Vac 7XV5700-1AA0 Converter Full duplex fiber optic cable - RS485 Auxiliary voltage: 24 Vdc to 250 Vdc, 110/230 Vac Line converter FSMA plug...

  • Page 117: Block Diagram - Measuring System

    Appendix Block diagram - Measuring system 7SS601 Figure A-1 Block diagram of the 7SS601 measuring system (default setting of binary inputs, command and signal relays as delivered) 7SS60 Manual E50417-G1176-C132-A2...

  • Page 118: Block Diagrams - Peripheral Modules

    Appendix Block diagrams - Peripheral modules Restraint/ command output module 7TM700 Attention! All relay coils depend on polarity Figure A-2 Block diagram for 7TM700 restraint/command output module 7SS60 Manual E50417-G1176-C132-A2...
  • Page 119 Appendix Preferential treatment/ L+ internal L+ internal X2:26 isolator replica X2:1 module 7TR710 Start X2:2 blocking pulse 1 X2:25 X2:22 L- internal Blocking pulse 1 X2:21 binary input X2:5 L- internal measuring system X2:4 X17 X3 X2:8 X2:9 X2:7 X2:16 X2:15 X2:17 X2:12...
  • Page 120 Appendix Command output module 7TS720 Attention! All relay coils depend on polarity Figure A-4 Block diagram of 7TS720 command output module 7SS60 Manual E50417-G1176-C132-A2...

  • Page 121: Jumper Settings For The Measuring System

    Appendix Jumper settings for the measuring system 7SS601 Figure A-5 Location of the jumpers in the 7SS601 measuring system (delivery status) 7SS60 Manual E50417-G1176-C132-A2...
  • Page 122 Appendix Jumper Rated auxiliary voltage 24 / 48 Vdc 60 / 110 / 125 Vdc 220 / 250 Vdc 115 Vdc empty 1–2 2–3 2–3 2–3 1–2 empty 1–2, 3–4 2–3 Binary input Jumper Pick-up threshold 17 V 73 V Jumper RS485 interface without terminator...

  • Page 123: Jumper Settings For The Peripheral Modules

    Appendix Jumper settings for the peripheral modules Restraint/ command output module 7TM700 48/60V 48/60V 48/60V 48/60V 48/60V 110/125V 110/125V 110/125V 110/125V 110/125V 220/250V 220/250V 220/250V 220/250V 220/250V Figure A-6 Location of the jumpers on the 7TM700 restraint/command output module (delivery status) Jumper Rated auxiliary voltage 24 / 48 Vdc...
  • Page 124 Appendix Preferential treatment/ isolator replica module 7TR710 Figure A-7 Location of the jumpers on the 7TR710 preferential treatment/isolator replica module (delivery status) Refer to Figure A-3 for the function of the jumpers. The jumper assignment depends on the configuration. A-12 7SS60 Manual E50417-G1176-C132-A2...
  • Page 125 Appendix Command output module 7TS720 48/60V 48/60V 48/60V 48/60V 48/60V 48/60V 48/60V 110/125V 110/125V 110/125V 110/125V 110/125V 110/125V 110/125V 220/250V 220/250V 220/250V 220/250V 220/250V 220/250V 220/250V 48/60V 110/125V 220/250V Figure A-8 Location of the jumpers on the 7TS720 command output module (delivery status) Jumper Rated auxiliary voltage 48 / 60 Vdc...

  • Page 126: Operating Tree

    Appendix Operating tree The following operating tree gives you an overview of the address blocks and setting parameters of the 7SS601 busbar protection system. It shows the operating sequenc- es that must be followed to make a specific selection. Table A-2 Operating tree of the 7SS601 1st level 2nd level...
  • Page 127 Appendix Table A-2 Operating tree of the 7SS601 1st level 2nd level 3rd level 4th level 5th level  0$56+  %,   %,   0$56+  %,   %,   0$56+  0$56+ 6,*  6,*5(/ 6,*5(  6,*...
  • Page 128 Appendix Table A-2 Operating tree of the 7SS601 1st level 2nd level 3rd level 4th level 5th level  0$56+ /('  /('  /('  0$56+  0$56+ &0'  &0'5(/ &0'5(  &0' ,1723  /$1*8$  ,17(5 '(9,&( )$&( )(('(5...
  • Page 129 Appendix Table A-2 Operating tree of the 7SS601 1st level 2nd level 3rd level 4th level 5th level $1181&  23(5 $1181&  )$8/7  OVW $1181& )$8/7  QG )$8/7  UG )$8/7  WK )$8/7  WK )$8/7  WK )$8/7  WK...
  • Page 130 Appendix Table A-2 Operating tree of the 7SS601 1st level 2nd level 3rd level 4th level 5th level $'',7,21 7,0( 7,0( )81&7,21 6(77,1* 6(77,1* '$7( 7,0( 7(67 ,2 67$7 %,67$7 $,'6 5(67$7 67$786 021,725 A-18 7SS60 Manual E50417-G1176-C132-A2...

  • Page 131: Overview Of Parameters

    Appendix Overview of parameters DIGSI Parameter Possible settings Default setting Explanation addr. 1101 01 FREQ 50 Hz 50 Hz Rated frequency of power system 60 Hz 1134 01 T-TRP 0.01s to 32.00 s 0.15 s Minimum duration of TRIP command 1135 01 L.Out Lockout function...

  • Page 132: List Of Information

    Appendix List of information Abbreviation Meaning FNo. Function number of annunciation Op/Ft Operational/fault annunciation C/CG Coming/Coming and going annunciation Measurand can be marshalled to binary input can be marshalled to binary output (LED, signal/command relay) Binary trace for fault recordings Annunciation for General Interrogation Table A-3 Annunciations of the 7SS601 busbar protection system...
  • Page 133 Index Dimensions 9-17 Matching transformers Accessories 9-15 Measuring system Application scope 9-16 Peripheral modules housing 7-2, 7-4 Auxiliary voltage 9-17 Summation current transformers 4-14 Baud rate Earth current sensitivity Block 81 Increased Block 82 5-11 Normal Block 84 Block diagram Peripheral modules Fault events Block diagrams...
  • Page 134 Index Target audience Marshalling Qualified personnel Binary inputs 4-12 Command relays 5-14 General Rated frequency 4-11 5-15 LEDs Rated system frequency Signal relays Repair 5-12, 5-13 Matching transformers Replacing the mini-fuse Measured values Restraint 5-18 Measurement method Restraint factor Basic principle Return of device to factory Output circuit Routine checks...

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