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Siemens SIPROTEC 7SS522 V4.6 Manual

Siemens SIPROTEC 7SS522 V4.6 Manual

Distributed busbar/breaker failure protection

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Manual (430 pages)

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SIPROTEC

Distributed Busbar/ Breaker

Failure Protection

7SS522 V4.6

7SS523 V3.3

7SS525 V3.3

Manual

C53000-G1176-C182-3

Preface

Table of Contents

Introduction

Design and Connection System

Getting Started

Configuration

Functions

Control During Operation

Installation and Commissioning

Maintenance and Repair

Technical Data

Appendix

References

Index

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Table of Contents

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Summary of Contents for Siemens SIPROTEC 7SS522 V4.6

Page 1 Preface Table of Contents Introduction Design and Connection System SIPROTEC Getting Started Distributed Busbar/ Breaker Failure Protection Configuration 7SS522 V4.6 Functions 7SS523 V3.3 7SS525 V3.3 Control During Operation Installation and Commissioning Manual Maintenance and Repair Technical Data Appendix References Index C53000-G1176-C182-3...
Page 2 ® that you care to suggest. DIGSI is a registered trademark of SIEMENS AG. Other designations in this manual may be trademarks that if used by third parties for their own pur- Subject to technical modifications. poses may violate the rights of the owner.
Page 3 Council Directive in agreement with the generic standards EN 61000-6-2 and EN 61000-6-4 (for EMC directive) and with the standard EN 60255-6 (for Low Voltage Di- rective) by Siemens AG. The device is designed and manufactured for application in industrial environment.
Page 4 Preface Additional support For any questions concerning your SIPROTEC system, please contact your Siemens representative. Training courses Individual course offers may be found in our Training Catalog, or questions can be di- rected to our training center in Nuremberg. Instructions and...
Page 5 Preface QUALIFIED PERSONNEL For the purpose of this instruction manual and product labels, a qualified person is one who is familiar with the installation, construction and operation of the equipment and the hazards involved. In addition, he or she has the following qualifications: •...
Page 6 Preface Besides these, graphical symbols are used according to IEC 60 617–12 and IEC 60 617–13 or symbols derived from these standards. The most frequent symbols are the following: Input signal of an analogue quantity OR-combination of input values AND-combination of input values Exclusive–OR gate: output is active, if only one of the inputs is active 2-of-3-combination of input values...
Page 7: Table Of Contents
Table of Contents Introduction............................1 Overall Operation ........................2 Applications ..........................4 Features ..........................5 Design and Connection System....................... 13 General..........................14 Central Unit .......................... 15 2.1.1 Front View ..........................15 2.1.2 Modules and Submodules ....................16 2.1.3 Design ..........................17 Bay Unit ..........................
Page 8 Table of Contents and the Bay Unit ........................39 Operation of SIPROTEC Devices from the Operator Panel ..........40 3.6.1 User Interface ........................40 3.6.2 Navigating the Operating Tree of the Display............... 40 3.6.3 Setting Addresses in the Bay Unit ..................41 3.6.4 Adjusting the Display Contrast....................
Page 9 Table of Contents Functions............................91 Busbar Protection ......................... 92 5.1.1 Mode of operation ........................ 92 5.1.1.1 Basic Principle ........................92 5.1.1.2 Algorithm with Instantaneous Values ................... 94 5.1.1.3 Separate Evaluation of Half-Cycles..................96 5.1.1.4 Evaluation of the Initial Values ..................... 99 5.1.1.5 Algorithm with Filtered Values ....................
Page 10 Table of Contents End Fault Protection ......................135 5.4.1 End Fault Protection in the Feeder ..................135 5.4.2 Protection with fault in the ”Dead Zone” of the Bus Coupler..........137 5.4.2.1 Without detection of the circuit-breaker position..............137 5.4.2.2 With detection of the circuit-breaker position, circuit breaker closed........137 5.4.2.3 With detection of the circuit-breaker position, circuit breaker open ........
Page 11 Table of Contents Protection General ......................167 5.9.1 Current-Controlled TRIP Reset ..................167 5.9.2 Local Control of the Bay Unit....................167 5.9.3 Operating States "Bay Out of Service", "Maintenance Mode"..........168 5.9.4 Overcurrent-Controlled TRIP command ................169 5.9.5 Feeder-Selective Trip Release ................... 170 5.9.6 Testing the Tripping Circuits and the Circuit Breakers ............
Page 12 Table of Contents 5.16 Overcurrent Protection in the Bay Unit ................188 5.16.1 Functional Description ......................188 5.16.2 Setting Notes ........................190 5.16.3 Settings of the Bay Unit ...................... 195 5.16.4 List of Information from the Bay Unit .................. 196 5.17 User-Defined Annunciations ....................
Page 13 Table of Contents Feeder Shutdown and Commissioning................244 Maintenance Mode ......................247 Plant Visualization ......................249 Installation and Commissioning ....................255 Installation and Commissioning..................256 7.1.1 Central Unit ........................256 7.1.2 Bay Unit ..........................257 7.1.3 General Information on the 2-Bay Bus Coupler..............258 7.1.3.1 General..........................
Page 14 Table of Contents Maintenance and Repair........................289 Maintenance ........................290 Fault Analysis ........................292 8.2.1 Evaluation of Operational Events ..................292 8.2.2 Checking the Auxiliary Voltage Supply ................293 8.2.3 Checking the LEDs on the Modules ................... 293 8.2.4 Analysis of Internal Communication Failures..............295 Troubleshooting ........................
Page 15 Table of Contents Appendix ............................335 Data for Selection and Ordering ..................336 A.1.1 Central Unit ........................336 A.1.2 Bay Units ..........................337 A.1.3 Accessories ........................338 Basis for Selection of the Stabilization Factor k ..............341 Connection Diagrams ......................342 Settings −...
Page 16 Table of Contents 7SS52 V4 Manual C53000-G1176-C182-3...
Page 17: Introduction
Introduction This chapter introduces the SIPROTEC 7SS52 V4 distributed busbar and breaker fail- ure protection. An overview of the device is presented in its application, characteris- tics, and scope of functions. Overall Operation Applications Features 7SS52 V4 Manual C53000-G1176-C182-3...
Page 18: Overall Operation
Introduction Overall Operation The SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection consists of compact bay units which are connected to the central unit by fiber-optic cables. Fig- ure 1-1, page 3 shows the basic structure of the protection system. All tasks from acquisition of the measured values up to the commands to the circuit breakers are exclusively processed in a digital manner.
Page 19: C53000-G1176-C182
Overall Operation SBK: Protection processing Serial coupling DPR: Dual port RAM Power supply I/O CU: Input/output central unit ZPS: Central processor protection SBK: Bus master Figure 1-1 General view of the configuration of the protection system 7SS52 V4 Manual C53000-G1176-C182-3...
Page 20: Applications
Introduction Applications Application The SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection is a se- lective, reliable and fast protection for busbar short-circuits and circuit-breaker failures in medium-voltage, high-voltage and extra high-voltage switching stations. It is suita- ble for almost all busbar configurations. The busbar protection uses a phase-selective measuring principle.
Page 21: Features
Features The overcurrent-time protection is a back-up protection function of the bay unit and in- cludes the following functions (see Chapter 5.16, page 188): • Phase-selective high-set stage (I>>) • High-set stage for the earth current (IE>>) • Phase-selective overcurrent stage with definite time or inverse time characteristic (I>...
Page 22 Introduction • Output of indications to − Control center − LEDs − Binary outputs of the central unit • Commissioning support by measuring and display functions, and output of indica- tions to a control center as well as to LEDs and outputs of the central unit. Busbar The digital busbar protection contains the following functions: protection...
Page 23 Features • Circuit breaker failure protection (CBF), selectable per bay, for low-current faults in the variants − I> query (1-stage CBF) − TRIP repetition with overcurrent detection I> (2-stage CBF) − Unbalancing (1-stage CBF) − TRIP repetition with following unbalancing (2-stage CBF) −...
Page 24 Introduction Breaker failure The integrated circuit breaker failure protection (CBF) contains the following functions: protection • In case of a busbar short-circuit, a breaker failure is detected by comparison of cur- rent thresholds. • In all operating modes of the circuit breaker failure protection, a bay-selective com- mand is output by the bay units to trip the circuit breaker at the remote end (transfer trip command).
Page 25 Features End fault protection This mode detects short-circuits between the current transformers and the circuit breaker and generates the necessary commands to disconnect the faulted line. Overcurrent The overcurrent protection of the bay unit is independent of the busbar protection protection function and of the central unit.
Page 26 Introduction Fault recording During a fault event, the instantaneous values of the measured values are stored at intervals of 1 ms at 50 Hz and 0.83 ms at 60 Hz respectively in a buffer of the central unit or of the bay units. The central unit calculates from the instantaneous values the differential and restraint currents of each phase for all busbar sections and the check zone.
Page 27 Features Each bay unit 7SS525 has • 3 command relays with each 2 NO contacts • 2 command relay with 1 NO contact • 1 command relay with 1 NO contact • 1 alarm relay with 1 NC contact (device failure, not marshallable) The functional allocation of the outputs can be marshalled with the DIGSI communi- cation software.
Page 28 Introduction Event buffer in cen- The SIPROTEC 7SS52 V4 distributed busbar and circuit breaker failure protection tral unit supplies battery-buffered data for the analysis of faults as well as for operational events. Up to 200 operational events and 80 fault events with real-time information are stored in a circulating buffer in the central unit.
Page 29: Design And Connection System
Design and Connection System This chapter describes the design of the central unit and the bay units that constitute the SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection. It explains what housing versions are possible and what connection methods are used. General Central Unit Bay Unit...
Page 30: General
Design and Connection System General The SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection is com- prised of: • Central unit • Bay units • Data links (fiber-optic cables) Prefabricated fiber optic cables with double-end ST plug connectors are used for the data exchange.
Page 31: Central Unit
Central Unit Central Unit The central unit is installed in an ES902 C (SIPAC) subrack. On account of the modular design, different variants and degrees of expansion can be coordinated with the station configuration. 2.1.1 Front View Figure 2-1 Front view of the central unit LEDs for the indication of operating states LCD for textual display of process and device information Navigation keys for moving through the operating tree...
Page 32: Modules And Submodules
Design and Connection System Function keys: Alarm list Operational events Measured values Last fault freely parameterizable LEDs for display of process or device information. Next to the LEDs, there is a labeling strip for labeling of the function of each LED. 10 LED key for testing and resetting the LEDs 2.1.2 Modules and Submodules...
Page 33: Design
Central Unit Processor The 4 processor modules (ZPS-SBK; ZPS-BSZ1 to ZPS-BSZ3) provide the protection modules (ZPS) functions. Another 1 to 6 modules (depending on the system configuration) are used for commu- nication with the interfaces (ZPS-SK1 to ZPS-SK6) to ensure the data exchange with the bay units.
Page 34: Bay Unit
Design and Connection System Bay Unit The bay units are available in a 7XP20 housing for panel flush mounting and cubicle mounting, or in a housing for panel surface mounting for bay unit 7SS523. 2.2.1 Front View Figure 2-3 Front view of the bay unit 7SS523 and 7SS525 LEDs for the indication of operating states LCD for textual display of process and device information Navigation keys for moving through the operating tree...
Page 35: Modules And Submodules
Bay Unit LED key for testing and resetting the LEDs and for display of operational measured values in 4-line mode Freely parameterizable LEDs for display of process or device information. Next to the LEDs, there is a labeling strip for labeling of the function of each LED. 10 Freely parameterizable LED.
Page 36 Design and Connection System Figure 2-5 Module arrangement in the bay unit 7SS525 PFE/SVW module In the PFE/SVW module the firmware is located and processed; it also contains the power supply, the current transformers and the measured value acquisition function. AFE module The AFE module contains the alarm and trip relays.
Page 37: Design
Bay Unit 2.2.3 Design 2.2.3.1 Panel Surface Mounting For panel surface mounting, only possible for device 7SS523, the bay units are deliv- ered in casings type 7XP20. The front plate is hinged and can be pulled out with a plastic tab and swung to the left for easy servicing. All signals including the auxiliary voltage are connected to two-tier terminals.
Page 38: Connection Method
Design and Connection System Connection Method 2.3.1 Location of Device Connections Central unit Figure 2-6 Device connections on central unit 7SS52 V4 Manual C53000-G1176-C182-3...
Page 39 Connection Method Bay unit Panel surface mounting Figure 2-7 Device connections on bay unit 7SS523 for panel surface mounting 7SS52 V4 Manual C53000-G1176-C182-3...
Page 40 Design and Connection System 7SS523 bay unit Panel flush mount- ing or cubicle mounting Figure 2-8 Device connections on bay unit for panel flush mounting or cubicle mounting 7SS52 V4 Manual C53000-G1176-C182-3...
Page 41: Device Connections
Connection Method 7SS525 bay unit Panel flush mounting or cubicle mounting Figure 2-9 Device connections on bay unit 7SS525 2.3.2 Device Connections Table 2-1 Overview of device connections Variant Current connections Voltage connections FO connections Central unit Screw connection Integrated for max.
Page 42: Screw-Type Terminals
Design and Connection System 2.3.2.1 Screw-Type Terminals Connection The voltage connections of the central unit and the voltage and current connections of the bay units have screw terminals. For assignment of the terminals, please refer to the Figures A-3, page 342 and A-5, page 345 in the Appendix. Connection method Use copper conductors only! You can use solid conductors or stranded conductors with end sleeves.
Page 43: D-Sub Female Connectors
Connection Method 2.3.2.3 D-SUB Female Connectors Connectors The serial ports of the central unit and of the bay units have 9-pole D-SUB female con- nectors. The serial ports include: • the PC port at the front of the central unit and the bay unit •...
Page 44: En100 Module Ethernet (Iec 61850)
Design and Connection System Note The bending radius of the available FO cables may not be smaller than 200 mm for outdoor cables and 80 mm for indoor cables. If you use other fiber types than those recommended above, please make sure to ob- serve the manufacturer’s specifications.
Page 45: Getting Started
Getting Started This chapter describes the first steps that you should take after receiving your SIPROTEC 7SS52 V4 system. After unpacking, please check whether the version and rated data match your require- ments. Match the rated control voltages of the system components to your station con- ditions and insert the buffer batteries.
Page 46: Unpacking And Repacking
Getting Started Unpacking and Repacking The protection system is packaged at the factory to meet the requirements of IEC 60255-21. Unpack and pack the devices with normal care, without using force, and with appro- priate tools. Visually check the device immediately upon arrival for correct mechanical condition. Please observe the instruction leaflet and any other documentation that may be part of the delivery.
Page 47: Matching The Control Voltage For The Binary Inputs And Inserting The Buffer Battery
Matching the Control Voltage for the Binary Inputs and Inserting the Buffer Battery Matching the Control Voltage for the Binary Inputs and Inserting the Buffer Battery Control voltage Warning! Only one jumper may be fitted per binary input. When delivered, the binary inputs of the EAZ and D-CPU modules in the central unit, and the EFE or EFE_10 modules in the bay units, are configured for 220 V rated con- trol voltage.
Page 48 Getting Started Figure 3-1 Location of the jumpers on the EAZ module (central unit) Table 3-1 Control voltage for the binary inputs on the EAZ (central unit) in relation to the fit- ted jumper Control voltage setting Name 24 V 60 V 110 V 220 V...
Page 49 Matching the Control Voltage for the Binary Inputs and Inserting the Buffer Battery Figure 3-2 Location of the jumpers and the buffer battery on the D-CPU module (central unit) Table 3-2 Control voltage for the binary inputs on the D-CPU module (central unit) in rela- tion to the fitted jumper Connector Binary...
Page 50 Getting Started Bay unit 7SS523 Warning! Dangerous voltages may be present inside the device! Make sure to switch the auxiliary voltage off before opening the front panel. To change the rated control voltages of the binary inputs in a bay unit: Open the front panel.
Page 51 Matching the Control Voltage for the Binary Inputs and Inserting the Buffer Battery Table 3-3 Control voltage for the binary inputs on the EFE (bay unit) in relation to the fitted jumper Control voltage setting Name 24 V 60 V 110 V 220 V BI 1...
Page 52 Getting Started Bay unit 7SS525 Warning! Dangerous voltages may be present inside the device! Make sure to switch the auxiliary voltage off before opening the front panel. To change the rated control voltages of the binary inputs in a bay unit: Open the front panel.
Page 53 Matching the Control Voltage for the Binary Inputs and Inserting the Buffer Battery Table 3-4 Control voltage for the binary inputs on the EFE_10 (bay unit) in relation to the fitted jumper Control voltage setting Name 24 V 60 V 110 V 220 V BI 1...
Page 54: Electrical Checks
Getting Started Electrical Checks Make sure that the operating conditions are compliant with VDE0100 and VDE0105 Part 1. The devices should have been in the final operating area for a minimum of two hours before the power source is first applied. This time allows the device to attain temper- ature equilibrium, and dampness and condensation to be avoided.
Page 55: Setting Up The Communication Between The Central Unit
Setting up the Communication between the Central Unit and the Bay Unit Setting up the Communication between the Central Unit and the Bay Unit The 7SS52 V4makes it possible to configure, parameterize and operate your station centrally from one PC connected to the central unit and running the DIGSI software. A prerequisite for this is that the central unit can communicate with the bay units.
Page 56: Operation Of Siprotec Devices From The Operator Panel
Getting Started Operation of SIPROTEC Devices from the Operator Panel In addition to operating your station with the DIGSI software (see Chapter 6, page 209), the 7SS52 V4 allows you to operate the central unit and the bay units 7SS523 locally from the user interface on the device.
Page 57: Setting Addresses In The Bay Unit
Operation of SIPROTEC Devices from the Operator Panel 3.6.3 Setting Addresses in the Bay Unit The central unit can only communicate with the bay units if the setting of the substation address, the feeder address and the device address in each bay unit matches the cor- responding IEC addresses in the DIGSI Manager.
Page 58 Getting Started 7200 PC/SYSTEM 7201 DEVICE ADD. INTERFACES ENTER Enter password ¹¹¹¹¹¹ ENTER Passw. accepted ENTER ENTER 7201 DEVICE ADD. CHANGE MODE Figure 3-5 Operator menu for setting the device address in the bay units To change the substation address or the feeder address from the operator panel of the bay unit, go to the parameters 7202 FEEDER ADD.
Page 59: Adjusting The Display Contrast
Operation of SIPROTEC Devices from the Operator Panel 3.6.4 Adjusting the Display Contrast Note The factory setting of the contrast for the integrated LC display can only be changed in the central unit. A higher contrast, for instance, makes the display more easily readable when viewed from a flat angle.
Page 60: Storage
Getting Started Storage If parts of the system are not used immediately, they can be stored after verification of the rated data. The following storage conditions should be observed: • SIPROTEC devices and associated assemblies should be stored in a dry and clean place, For storage of devices or related spare modules the applicable temperature range is between −25 °C and +70 °C (-13 °F to +158 °F) (Chapter 9.2.16, page 326).
Page 61: Configuration
Configuration This chapter describes how to use DIGSI to configure the SIPROTEC 7SS52 V4 dis- tributed busbar and breaker failure protection on your PC. First you must create central units and bay units in DIGSI Manager. Then open the central unit in the DIGSI Manager and start the DIGSI Plant Configuration. As next step you will use the DIGSI Plant Configuration to draw and parameterize a complete substation.
Page 62: Creating A Project
Configuration Creating a Project When configuring with DIGSI you must first create a new project. To create a new project you must: Start DIGSI Manager. Open the dialog box File → New. Specify the project name and its filing location. The project window will open upon that.
Page 63: Inserting Central Unit / Bay Units
Inserting Central Unit / Bay Units Inserting Central Unit / Bay Units In the next step you will insert the central unit and the bay units into the structure of the project. To insert the central unit into the project structure you must: Open the context menu in the project window of DIGSI Manager and open the De- vice Catalog.
Page 64 Configuration To insert the bay units into the project structure you must: Switch to the directory 7SS523 or 7SS525 in the Device Catalog and drag the ob- ject V3.3 for the version, the left mouse button depressed, to the desired position within the project structure.
Page 65: Plant Configuration
Plant Configuration Plant Configuration In the last section you have created central units and bay units in DIGSI Manager. This will be the basis for you to configure the substation in the next step. The DIGSI Plant Configuration is used for the configuration. The DIGSI Plant Configuration is a tool which enables you to compile all information items required by the central unit.
Page 66: Starting The Plant Configuration
Configuration 4.3.2 Starting the Plant Configuration To start the DIGSI Plant configuration you must: Select the central unit 7SS522 in the project window of DIGSI Manager and open the context menu via right mouse click. Apply the command Open object. The Open device dialog box opens.
Page 67 Plant Configuration Note The Plant Configuration and the Plant Visualization cannot run simultaneously. Close the Plant Visualization before you start the Plant Configuration. DIGSI Figure 4-6 Start screen of the Plant Configuration Note For a detailed instruction on how to use the DIGSI Plant Configuration, please refer to the corresponding on-line help.
Page 68: Drawing Busbars
Configuration 4.3.3 Drawing Busbars Busbars can be drawn into the substation chart in vertical or horizontal direction. A busbar can also be a combination of vertical and horizontal lines. For this purpose place the starting point of the busbar you want to draw on the end point of an existing busbar.
Page 69 Plant Configuration Figure 4-7 DIGSI Plant Configuration, Drawing busbars - Example To name the busbar you must: Right-click the busbar. Click Object properties in the context menu. The dialog box Object Properties - Busbar opens. Figure 4-8 Dialog box Object Properties - Busbar Enter a busbar name of not more than 4 characters into the box Name short.
Page 70: Defining Bays
Configuration Enter a busbar name of not more than 8 characters into the box Name long. This name will be displayed as movable text within the chart. The long name will also show in the measured value boxes of the busbar. Select one of the 12 busbar sections (BB01 to BB12) or bus coupler sections (TB01 to TB12) from the box Busbar section.
Page 71 Plant Configuration Enter a bay name of not more than 4 characters into the box Short text. This name will be used to characterize the associated information in the Configuration Matrix. Enter a bay name of not more than eight characters into the box Long text. This name will be displayed as movable text within the chart of the substation.
Page 72: Inserting Dynamic Elements
Configuration 4.3.5 Inserting Dynamic Elements Static and dynamic elements are inserted into the chart from libraries. Dynamic ele- ments such as isolators, circuit breakers and transformers usually have several pos- sible states. Each state is represented by a separate symbol. Static and dynamic elements are filed in different libraries.
Page 73 Plant Configuration Isolators, transformers and circuit breakers have properties whose values must be set individually. To specify the property values of a dynamic element you must: Right-click a single element. Click Object properties in the context menu. A prop- erties dialog opens for the selected element. Make the required settings.
Page 74: Connecting Dynamic Elements To The Busbars
Configuration 4.3.6 Connecting Dynamic Elements to the Busbars Dynamic elements can be connected to busbars via lines. 4.3.6.1 Inserting Lines Lines can connect elements such as isolators, transformers, circuit breakers and lines with each other and to a busbar. Lines can be drawn into the substation chart in verti- cal or horizontal direction.
Page 75: Inserting A Connection
Plant Configuration 4.3.6.2 Inserting a Connection Lines or busbars that cross in the chart are not yet connected electrically. To this end you must insert an additional connection in the junction point. Such a connection is in- dicated by a small square. By manually adding a connection each line is separated into two autonomous lines.
Page 76: Normalized Current
Configuration 4.3.7 Normalized Current Normally, the configuration tool determines the so-called normalized current automatically by searching for the current transformer with the highest primary nominal current when you exit the configuration. All parameters with the dimension l/ lno refer to this reference value. You can select any other normalized current in the configuration tool under Tools →...
Page 77: Inserting Static Text
Plant Configuration 4.3.8 Inserting Static Text You can use static text to give additional short information within the chart. A static text may be composed of not more than twenty characters. To insert static text you must: Click Tools→Insert Text. Alternatively, you can click the button on the chart toolbar.
Page 78: Creating And Inserting Typicals
Configuration 4.3.9 Creating and Inserting Typicals. An arrangement of different elements in the substation chart can be saved as a so- called Typical. This Typical may then be inserted anywhere else in the substation chart or into other charts. Note Unlike a Typical a Template represents an entire substation chart which may be com- posed of Typicals.
Page 79: Configuration Notes
Configuration Notes Configuration Notes The 7SS52 V4 can be applied for the protection of busbar configurations with quintu- ple busbars as a maximum and up to 48 feeders. • When configuring the up to 12 busbar sections and 12 bus coupler sections you will determine the description, busbar section number and colour for the individual bus- bar sections (BB01 to BB12) or bus coupler sections (TB01 to TB12).
Page 80 Configuration 1a) inside current transformer (referred to Q7), in the direction of the busbar (referred to Q0) 1b) inside current transformer (referred to Q7), in the direction of the line (referred to Q0) 2) line inside current transformer (referred to Q7) Figure 4-15 Triple busbar with transfer busbar 7SS52 V4 Manual C53000-G1176-C182-3...
Page 81 Configuration Notes Table 4-1 Configuration for a triple busbar with transfer busbar Bay: (XX) Bay: Type CT LOC Feeder bay 1a) Bus side t. bus 1b) Bus side t. line 2) line side 2-bay coupler Bus side t. line 2-bay coupler non existent 2-bay coupler Bus side t.
Page 82 Configuration Figure 4-16 Double busbar with combi-bus Table 4-2 Configuration of a double busbar with combi-bus Bay: (xx) Bay Type CT LOC 1-bay coupler Bus side t. line Feeder bay line side Feeder bay line side 1-bay coupler w/o CB Bus side t.
Page 83 Configuration Notes Bay types In the DIGSI Plant Configuration you may configure the feeders as 1-bay-coupler, 2- bay-coupler, feeder bay or sectionalizer. Reserve bays Reserve bays may be provided for in the configuration; they may be assigned any number that corresponds to their actual location. DIGSI configures the corresponding bay to not existent, if it has been drawn in the Plant Configuration but is not assigned in the "Bay unit allocation".
Page 84 Configuration CT location The DIGSI Plant Configuration evaluates the CT location for the end fault protection and for stations with transfer busbars. The settings mean in this context: • busside towards busbar means that the transformer is located between the circuit breaker and the busbar isolator (Figure 4-15, page 64, 1a) •...
Page 85 Configuration Notes Figure 4-18 Object properties of the transformer T1 from the example given in Figure 4-17, page 68 Figure 4-19 Example for the configuration of a 2-bay coupler with two CTs Bay unit BU 1 E02a BU 2 E02b BU 3 BU 4 BU 5...
Page 86 Configuration Figure 4-20 Object properties of the transformer from the example given in Figure 4-19, page 69 7SS52 V4 Manual C53000-G1176-C182-3...
Page 87: Assigning Bay Units
Assigning Bay Units Assigning Bay Units In the previous step you have drawn and parameterized your entire substation with the DIGSI Plant Configuration. Thus you have also configured bay units. Subsequently you must assign these bay units to the bay units in the Device Manager (see Chapter 4.2, page 47).
Page 88 Configuration Assign the created bay units in the right column to the configured bay units. In each row of the right column select a bay unit you have created in the Device Manager from the drop-down list. Bay units that are already assigned will not appear in the drop-down list.
Page 89: Marshalling
Marshalling Marshalling In the previous step you have assigned the configured bay units to the bay units cre- ated in the Device Manager. Next you will allocate information items to the input and output components of 7SS52 V4 such as binary inputs and binary outputs or LEDs. Information items can be indi- cations and measured values.
Page 90: Marshalling
Configuration 4.6.1.2 Marshalling To marshal information items of the central unit via the Configuration Matrix you must: Note Bay units can only be allocated if they have been “instanciated” by the assignment of library elements (see Chapter 4.3.5, page 56) and by saving the substation chart Chapter 4.3.10, page 62.
Page 91 Marshalling Changing Alloca- Right-click the cell containing a tag (flag). The context menu shows you all tags with tions their meaning which are possible for this combination of the information with the source or the destination. You will always be offered the tag _ (not configured). Click this entry in the context menu.
Page 92: Marshalling Bay Unit Information
Configuration 4.6.2 Marshalling Bay Unit Information 4.6.2.1 Allocable Information Binary inputs The bay unit 7SS523 features 20 binary inputs which are designated BINARY INPUT 1 to BINARY INPUT 20, bay unit 7SS525 features 10 binary inputs. The binary inputs are marshalled in the address block 6100/BU. It can be selected for each binary input function whether it is to operate as make circuit or as break circuit.
Page 93: Marshalling
Marshalling The allocable signalling functions can be looked up in Chapter A.10, page 383 and match the signal relay functions. Trip relay The bay unit features 5 trip relays which are labelled TRIP RELAY 1 to 5. Several functions can be marshalled to each trip relay. Also each logic function can be allocated to several trip relays.
Page 94 Configuration Figure 4-26 Marshalling the bay units - the dialog box Marshalling - Now select the name of the component to which you want to allocate one or several indications. Subsequently click Configure..A third dialog box opens. It gives an overview of how many indications of the selected component can basically be allo- cated and which indications are already marshalled.
Page 95 Marshalling Figure 4-28 Marshalling the bay units - dialog box 6101 Binary input 1 In the selection box select the display text of the messages you wish to assign to the selected component. If this component is a binary input or an LED, you must select an additional indication from the drop-down list box.
Page 96: Settings
Configuration Settings After you have used the Configuration Matrix to assign sources and destinations to the information items, you can configure the settings. For detailed information on how to parameterize SIPROTEC 4 devices, please read the SIPROTEC System Description, /1/. The settings of certain functions (see Chapter 5.10, page 177 and following sections) can only be configured for the bay units (PC linked to central unit or bay unit).
Page 97: Serial Ports
Settings 4.7.1 Serial Ports The central unit of 7SS52 V4 features one or more serial ports: one operating interface integrated in the front panel, also called PC port, and one rear service port and system port for connection to a control center. Communication via this port is subject to certain agreements concerning the device identification, the transmission format and the transmission rate.
Page 98 Configuration Figure 4-30 DIGSI, setting options of the service port − Example Within an IEC bus, a unique IEC address must be assigned to each SIPROTEC 4 de- vice. A total of 254 IEC addresses are available for each IEC bus. Enter the IEC link address of this device into the Address box.
Page 99 Settings Idle state of fibre The idle state of fibre optic connection is set to “Light OFF” by default. You can change optic connection the setting for the idle state in the tab of the interface settings (see Figure 4-31, page 83).
Page 100 Configuration PC Port 01/02 -------------------- IEC 60870–5–103 >IEC60870–5–103 –> 1 -------------------- >Phys.Address >Baudrate 9600 bauds Parity Gaps 0.0s OFF-Sig. Light OFF Figure 4-33 Reading out the setting values of the IEC 60870 port in the operator panel of the device. Bay units To enable correct communication of the PC and the bay units via the system port, some interface settings may have to be verified or changed.
Page 101: Date/Clock Management
Settings 4.7.2 Date/Clock Management The integrated date/clock management enables the exact timely assignment of events e.g., those in the operational annunciations and fault annunciations or in the lists of the minimum/maximum values. The time can be influenced by • the internal clock RTC (Real Time Clock), •...
Page 102 Configuration Figure 4-35 Time Synchronization & Time Format dialog box in DIGSI − Example Specify here the factors for influencing the internal clock management. You can choose between the following operating modes: Table 4-3 Operating modes of the clock management Operating mode Comments Internal Clock...
Page 103 Settings If the time synchronization is to be accomplished via the control center, the option IEC 60870-5-103 or NTP (IEC 61850) must be selected (Figure 4-35, page 86). For the operating modes with time signal (radio clock) you must observe that it may take up to 3 minutes after the start or return of the reception until the received time has been safely decoded.
Page 104 Configuration After the indication "Clock SyncError on” a time step must be expected. This in- Operational indica- tions of the clock dication is triggered if: management • a synchronization fault has lasted for longer than the above mentioned tolerance time or by changing the operating mode. •...
Page 105: Concluding The Configuration
Concluding the Configuration Concluding the Configuration Conclude the configuration by using a report to verify the allocation of the parameters and transmit the parameters to the central unit or to the bay units. To view a report when exiting the Plant Configuration you must: Click Options →...
Page 106 Configuration Allocation of isola- The evaluation protocol (report) shows the allocation of isolators as a coded value. The explanation is given in Table 4-4, page 90 Table 4-4 Allocation of isolator Value Allocation of isolator isolator not existent BB isolator or "sect. isolator left side" on BB01...BB12 100...1200 5100...6200 BB isolator or "sect.
Page 107: Functions
Functions This chapter explains the various functions of the SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection. It shows the setting possibilities for each func- tion in maximum configuration. It also gives information and - where required - formu- lae for determination of the setting values.
Page 108: Busbar Protection
Functions Busbar Protection The busbar protection represents the main function of the 7SS52 V4. It is character- ized by a high measurement accuracy and flexible matching to the existing station configurations. It is supplemented by a series of ancillary functions. The measurement methods described here below apply for the bus zone-selective protection as well as for the check zone.
Page 109 Busbar Protection the protection system, since their secondary circuits are isolated from the high-voltage system and their shielding windings are earthed. The current transformers are an essential part of the whole protection. Their charac- teristics are an important factor for the correct operation of the protection. Their phys- ical locations mark the limits of the protection zone covered by the protection system.
Page 110: Algorithm With Instantaneous Values
Functions The measuring circuit of the 7SS52 V4 is characterized by the following features: • Basic principle: Monitoring the sum of the currents as the tripping quantity • Measures taken to guard against the disturbing influences due to current-transform- er saturation: −...
Page 111 Busbar Protection Figure 5-3 Standard characteristic The vectorial sum I as the tripping quantity = | I ... + I is counterbalanced by the restraining quantity I = | I | + | I | ... + | I which is the arithmetic sum of the magnitudes of each current. The criterion for a short-circuit on the busbar is thus: >...
Page 112: Separate Evaluation Of Half-Cycles
Functions Earth fault charac- For the detection of high-resistance earth faults, tripping characteristics with increased teristic sensitivity are provided for the selective protection zones, the check zone and circuit breaker failure. These more sensitive characteristics have their own parameters. The stabilizing factor is identical with the normal load line.
Page 113 Busbar Protection the current above the axis to an extent that the current/time area is equal to that of the preceding half-cycle below the axis. Figure 5-5, page 98 b) illustrates the formation of the measured value according to the measurement algorithm employed assuming that the current flows into an external short-circuit beyond the protected zone.
Page 114 Functions Figure 5-5 CT currents and measured values in the event of an initially fully offset fault cur- rent; DC component decaying with τ = 64 ms 7SS52 V4 Manual C53000-G1176-C182-3...
Page 115: Evaluation Of The Initial Values
Busbar Protection A sophisticated combination of the above two distinguishing features stabilizes the op- erating characteristics of the SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection even under extremely difficult conditions, namely: • high degree of stability even during current transformer saturation •...
Page 116: Algorithm With Filtered Values
Functions 5.1.1.5 Algorithm with Filtered Values The protection logic eliminates any DC components in the differential current by cal- culating its fundamental wave. This increases the accuracy in the case of relatively small, offset differential currents and reduces the protection tripping times. The value of the differential current fundamental wave is determined by means of sine and cosine filters.
Page 117: Isolator Replica
Busbar Protection Figure 5-7 TRIP following 2-out-of-2 evaluation Figure 5-8 TRIP due to filtered value 5.1.2 Isolator Replica The allocation of the feeders to the bus zones is automatically determined by the po- sition of the isolators. Only the OPEN position is evaluated for the allocation of the feeders to the busbars. Therefore, no special demands such as adjustment are made on the isolator auxiliary contacts.
Page 118 Functions The assignment of a coupler bay to the relevant bus zones is only carried out when at least one isolator is activated on both sides of the coupler (left and right side of the circuit breaker). An operational current flow is only then possible. This ensures that, with the closing of the first isolator and a short-circuit in the coupler area, the busbar feeding the fault is immediately tripped independent of the fault location and the cur- rent position of the circuit breaker (CBaux).
Page 119: Bus Coupler Variants
Busbar Protection The 7SS52 V4 is configured to identify an isolator automatically as a line isolator. If an isolator is configured as line isolator, the feeder bay will only be allocated to a bus zone if both the corresponding bus isolator and the feeder isolator are closed. 5.1.3 Bus Coupler Variants Most large busbar configurations are divided into different zones which constitute au-...
Page 120: Bus Couplers With Two Current Transformers
Functions 5.1.3.2 Bus Couplers with Two Current Transformers Bus couplers can also have two current transformers, one on each side of the circuit breaker. The allocation of the currents to the subsystems overlaps in that case (Figure 5-11, page 103). The advantage of this design is that in case of a fault between the two current transformers both subsystems are tripped promptly, if not selectively.
Page 121: Transfer Busbars
Busbar Protection Figure 5-12 Operation of a bus coupler as switchgear bay The protected zone ends at the current transformer. All electrical elements including the isolators Q10 and Q20 are part of the line. Configuration note: The dotted part must not be displayed with Digsi! 5.1.3.6 Transfer Busbars In the case of external transformers, the transfer busbar can be protected selectively.
Page 122 Functions PROT TR Meas. system Check (5401/CU) zone Bay/ Line side Feeder, Feeder bus coup. coupler Bus side Feeder, Feeder bus coup. coupler Line side Feeder, unpro- Feeder, bus coup. tected Coup Bus side Feeder, unpro- Feeder, bus coup. tected Coup PROT TR Meas.
Page 123: Transfer Busbar With Inside Transformers
Busbar Protection 5.1.3.7 Transfer Busbar With Inside Transformers If the protection of the transfer busbar is impossible because of internal transformers or not required for outside transformers, PROT TR BUS (5401/CU) is to be configured with No. Then, only the Q7 on the bus coupler side is required to start the transfer op- eration.
Page 124: Setting Notes
Functions 5.1.4 Setting Notes STAB FAC:BZ The STAB FAC:BZ (6101/CU) is used to match the stabilizing factor for the bus zone- selective protection (common for all buses) to the service conditions. A high setting provides for more stability against faults outside the protection system but reduces the sensitivity for detecting busbar faults.
Page 125 Busbar Protection The CT with the highest burden factor K must be the basis for selecting the factor k. EF charact. The parameter EF charact. (6320A/CU) is used to match the busbar and breaker failure protection to the system conditions and to the treatment of the starpoint. An ex- planation of the standard characteristic and of the earth fault characteristic is given on page 95.
Page 126 This parameter is only displayed if the parameter EF charact. (6320A/CU) is re- leased. Siemens recommends to set the parameter Id> CZ - EF (6111A/CU) to 70% of the smallest 1-pole earth fault current to be expected. Is< CZ - EF The parameter Is<...
Page 127: Settings For The Central Unit
Busbar Protection 5.1.5 Settings for the Central Unit Addr. Setting Title Setting Options Default Setting Comments Combi-Coupler 106A Combi-Coupler 6101 STAB FAC:BZ 0.10 .. 0.80 0.65 Stabilizing factor - selective 6102 Id> BZ 0.20 .. 4.00 I/Ino 1.00 I/Ino Diff-current threshold - selective 6103 STAB FAC:CZ 0.00 ..
Page 128: Check Zone
Functions Check Zone 5.2.1 Mode of operation The measuring system for the check zone detects a short-circuit in all bays, regardless of the isolator status. In some special cases, isolator status must however be considered for the check zone. If the stabilizing current is calculated in the same manner as for the bus zone-specific busbar protection, overstabilization results in multiple busbar systems.
Page 129: Setting Notes
Check Zone Due to the phase angle differences between short-circuit current and load currents dif- ferences may occur in the formation of the sums. 5.2.2 Setting Notes The check zone has its own characteristics, which can be set with the parameters STAB FAC:CZ (6103/CU), Id>...
Page 130: Circuit Breaker Failure Protection
Functions Circuit Breaker Failure Protection The circuit breaker failure protection (CBF) function in the SIPROTEC 7SS52 V4 dis- tributed busbar and breaker failure protection detects a failure of the circuit breaker either in the event of a feeder short-circuit or a busbar short-circuit. •...
Page 131: Setting Notes
The parameter I> BF (118/CU) is used to set the threshold I at which the pro- tection detects a breaker failure and/or resets a TRIP command. Siemens recommends to set this parameter to about 50 % of the smallest short-circuit current to be expected. Note Please note that the limit value I>...
Page 132: Settings For The Central Unit
Functions 5.3.3 Settings for the Central Unit Addr. Setting Title Setting Options Default Setting Comments I> BF 0.10 .. 2.00 I / In 0.50 I / In Current threshold for BF I> BF-EF 0.05 .. 2.00 I / In 0.25 I / In Current threshold for BF - EF 6201 STAB FAC:BF...
Page 133: Bay-Specific Functions (Bu)
Circuit Breaker Failure Protection 5.3.5 Bay-Specific Functions (BU) All parameters of the breaker failure protection function can be set separately for each feeder. Thus the function can be matched to different types of bays (e.g. line, trans- former) or short-circuit conditions (e.g. low-current faults). 5.3.5.1 Triggering and Releasing the Breaker Failure Protection The parameter BF BI MODE (XX14/CU) is used to specify whether the breaker failure...
Page 134 Functions Figure 5-18 Triggering and releasing the breaker failure protection - 1-pole Figure 5-19 Monitoring the breaker failure protection triggering and release - 3-pole 7SS52 V4 Manual C53000-G1176-C182-3...
Page 135: Circuit Breaker Failure Protection During A Feeder Short-Circuit
Circuit Breaker Failure Protection 5.3.5.2 Circuit Breaker Failure Protection during a Feeder Short-Circuit In the event of a breaker failure following a feeder short-circuit, the fault current must be interrupted by isolating the bus zone to which the affected feeder is allocated. The breaker failure protection of the SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection is triggered by the TRIP command from the feeder protection.
Page 136 Functions Figure 5-20 Triggering by binary inputs Figure 5-21 Logic of the current check of the breaker failure protection 7SS52 V4 Manual C53000-G1176-C182-3...
Page 137 Circuit Breaker Failure Protection Continuation for (1) and (2) see Figure 5-46, page 205 Continuation for (3) and (4) see Figure 5-24, page 125 Figure 5-22 Breaker failure protection logic - operating modes 7SS52 V4 Manual C53000-G1176-C182-3...
Page 138 Functions I>query The circuit breaker failure protection (CBF) function is initiated by the TRIP command from the feeder protection. If the operating mode I>query is set with the parameter BF OP MODE (XX15/CU), the feeder current is monitored for exceeding the threshold set with the parameter I>...
Page 139 Circuit Breaker Failure Protection If the operating mode BZ unbalance is set with the parameter BF OP MODE BZ unbalance (XX15/CU), the system checks whether the TRIP command of the feeder protection has initiated the CBF function ">CBF Lx" (FNo. 7611, 7612, 7613/BU) or ">CBF 3-pole"...
Page 140 Functions If the operating mode external is set with the parameter BF OP MODE (XX15/CU), Initiation by external CBF the breaker failure is detected by an external device. On activation of the configured binary inputs of the bay unit ">CBF Lx" (FNo. 7611, 7612, 7613/BU) or ">CBF 3-pole"...
Page 141 Circuit Breaker Failure Protection Continuation for (3) and (4) see Figure 5-22, page 121 Figure 5-24 Low-current mode Pulse mode In the operating mode ”Pulse mode”, the circuit breaker failure protection is initiated by the opposite end of the line. It operates independently of the CBF function proper if the binary input ">CBF puls"...
Page 142: Circuit Breaker Failure Protection For Busbar Faults
Functions 5.3.5.3 Circuit Breaker Failure Protection for Busbar Faults While the busbar short-circuit is to be eliminated, a circuit-breaker failure may occur, too. In this case, the current must be interrupted from the remote end (Figure 5-25, page 126). The 7SS52 detects the breaker failure and allows a shorter tripping time by the trip sig- nal sent to the opposite line end.
Page 143: Failure Of The Bus Coupler Circuit Breaker
Circuit Breaker Failure Protection 5.3.5.4 Failure of the Bus Coupler Circuit Breaker If a busbar short-circuit occurs with the bus coupler closed (Figure 5-27, page 127), a TRIP command is issued to all related feeders of this zone and to the coupling bay units.
Page 144: Setting Notes
With setting 2-ch w sup, the breaker failure protection will be initiated after evalua- tion of an additional binary input ("CBF release"), with time supervision. For testing purposes, Siemens recommends to set this parameter to 1-ch w/o sup or 2-ch w/o sup.
Page 145 Circuit Breaker Failure Protection The parameter BF OP MODE (XX15/CU) is used to select the operating mode for the BF OP MODE breaker failure protection in the bay unit. The parameter setting depends on the pro- tection concept in use. With setting non existent the breaker failure protection will be deactivated.
Page 146 Functions The parameter TRIP REP. MODE (XX17/CU) is used to select the operating mode TRIP REP. MODE for TRIP repetition with 1-pole initiation. With setting 1pole, a single-pole TRIP repetition will be generated in the case of a single-pole start. The feeder current of the initiating phase and at least one of the other currents (phase or ground current) must exceed for this the threshold I>...
Page 147 Circuit Breaker Failure Protection The parameter T-TRIP repeat (XX25/CU) is used to delay the feeder-selective rep- T-TRIP repeat etition of the TRIP command issued by the breaker failure protection. The time for the TRIP repetition must be set to less than the delay times for the breaker failure protection T-BF-1P (XX20/CU), T-BF-mP (XX21/CU) and for the pulse mode T-BF IMP (XX23A/CU).
Page 148: Settings For The Central Unit
Functions 5.3.7 Settings for the Central Unit Addr. Setting Title Setting Options Default Setting Comments BF BI MODE 1-ch w/o sup 1-ch w sup Binary input mode / supervision 1-ch w sup 2-ch w/o sup 2-ch w sup BF OP MODE non existent BZ unbalance Operation mode BF...
Page 149: List Of Information From The Central Unit
Circuit Breaker Failure Protection 5.3.8 List of Information from the Central Unit $00, .., $03 are variables which will be automatically replaced by $00 Number of the bay unit $01 Bay name $02 Name of the switching element (e.g. isolator or circuit breaker) $03 Name of the bus zone FNo.
Page 150: List Of Information From The Bay Unit
Functions 5.3.9 List of Information from the Bay Unit FNo. Alarm Comments 7611 >CBF L1 >Circuit breaker failure start phase L1 7612 >CBF L2 >Circuit breaker failure start phase L2 7613 >CBF L3 >Circuit breaker failure start phase L3 7614 >CBF puls >Circuit breaker failure pulse 7615...
Page 151: End Fault Protection
End Fault Protection End Fault Protection The function of the end fault protection is to protect the zone between the current transformer and the circuit breaker when the circuit breaker is open. 5.4.1 End Fault Protection in the Feeder Bus-side With bus-side current transformers (Figure 5-28, page 136, 1a) the zone protected by current transform- the busbar protection is normally delimited by the location of the current transformer.
Page 152 Functions CT location: 1a) inside (relating to Q7) current transformers, busbar side (relating to Q0 1b) inside (relating to Q7) current transformers, line side (relating to Q0) 2) line-side current transformers (relating to Q7) Figure 5-28 Possible CT locations Figure 5-29 End fault protection 7SS52 V4 Manual C53000-G1176-C182-3...
Page 153: Protection With Fault In The "Dead Zone" Of The Bus Coupler
End Fault Protection 5.4.2 Protection with fault in the ”Dead Zone” of the Bus Coupler Normally, the current transformer is the boundary of the protected zone (measuring range). The zone between the current transformer and the circuit breaker is known as the "Dead Zone".
Page 154: With Detection Of The Circuit-Breaker Position, Circuit Breaker Open
Functions 5.4.2.3 With detection of the circuit-breaker position, circuit breaker open With the circuit breaker open, the device-internal treatment of the coupler current im- mediately and selectively switches off the busbar feeding the fault and interrupts the fault current, irrespective of the number of current transformers. Delayed When after a bus fault the circuit breaker reaches its final position and the secondary recognition...
Page 155: Setting Notes
End Fault Protection 5.4.3 Setting Notes T-CB open The parameter T-CB open (XX26/CU) is used to delay processing of the circuit breaker OPEN status for special treatment of the coupler currents and for the end fault protection. End Fault Prot If the bay is configured as a feeder, the parameter End Fault Prot (XX29/CU) is used to activate and deactivate the end fault protection.
Page 156: Supervisory Functions
Functions Supervisory Functions The 7SS52 V4 protection system incorporates comprehensive self-monitoring func- tions which cover both the hardware and the software. This guarantees a high availa- bility and security against overfunctioning and underfunctioning as well as low demand on maintenance. 5.5.1 Functional Description The entire protection system is cyclically monitored from the measuring inputs through...
Page 157 Supervisory Functions Bay unit failure All serial links between the bay unit and the central unit are continuously monitored in the central unit. A failure or disturbance of an operating bay unit leads to the output of an alarm but not to a system reset. The same is true for a failure or disturbance of the link between bay unit and central unit.
Page 158: Auxiliary And Reference Voltages
Functions 5.5.1.2 Auxiliary and Reference Voltages The bay unit processor monitors the reference voltages of the measured value detec- tion, as well as the supply voltages. The protection is suspended if the voltages devi- ate outside an allowable range; depending on the setting of the parameter BLOCKING MODE (6305/CU), the blocking is selective or complete;...
Page 159: Output Trip Supervision
Supervisory Functions Figure 5-33 Characteristic for measured value monitoring Memory supervi- The memory modules of the central unit and the bay units are periodically tested for sion faults. • A checksum is formed for the program memory (Flash EPROM) during start-up and cyclically during operation.
Page 160: Cyclic Test
Functions 5.5.1.7 Cyclic Test Central unit As part of the self-diagnostics, the protection functionality is checked on the basis of the isolator replica. The cyclic test in faultless operation includes the unbalancing of a current of a connected bay unit. The reaction of the bay unit is monitored. As this test is treated like a real fault and uses the same transmission links for meas- ured values and TRIP commands, it yields utmost security and reliability.
Page 161 Supervisory Functions Differential current The differential current of each measuring system is individually monitored. Under no- supervision fault conditions, the differential current of each measuring system is approximately ze- ro. If no feeders are assigned to a measuring system, the differential current and the stabilizing current are set to zero.
Page 162: Isolator Status Supervision
Functions Zero current When the primary current is interrupted, a current continues to flow in the CT circuit supervision on the secondary side. The busbar protection cannot distinguish this current from a differential current. At first, erroneous tripping is prevented by the stabilizing current. The stabilizing current decays according to an e-function with a time constant of 64 ms.
Page 163 Supervisory Functions Auxiliary voltage Usually, the isolator auxiliary voltage is sub-fused in each bay. If this auxiliary voltage supply failure is missing, then all the isolators in this bay display the bit pattern 0/0 (neither OPEN nor CLOSED). The indication "Bay DC fail G" (FNo. 10426/CU) and "Isol flt alarm"...
Page 164 Functions Isolator status indication Meaning Reaction Alarm CLOSED OPEN Alarm "$01 $02" Isolator malfunction: new isolator status (FNo.176.1110/CU), − runtime CLOSED "FltR $01$02" − wire break (FNo.176.1112/CU), "Isol flt run G" (FNo.10427/CU), "Isol flt alarm" (FNo. 176.10425/CU), "BayDCfail $00" − no auxiliary voltage new isolator status accord- ing to setting 6303/CU (FNo.176.1134/CU),...
Page 165 Supervisory Functions The following applies for the isolator position: Blocking occurs only when the bay with the Isolator position fault is assigned to a busbar. An alarm is generated, e.g. "$01 $02" (FNo. 176.1110/CU, 176.1115/CU,176.1120/ CU,176.1125/CU,176.1130/CU). a) 1-1 Position t = 500 ms 6304/CU is effective During the delay time t the old isolator position is kept.
Page 166 Functions Note: Blocking will only be performed if the bay suffering an isolator auxiliary voltage failure is assigned to a busbar. Figure 5-35 Alarms and Blockings upon Auxiliary Voltage Failure 7SS52 V4 Manual C53000-G1176-C182-3...
Page 167: Supervisory Of Circuit Breaker
Supervisory Functions 5.5.1.10 Supervisory of Circuit Breaker Interrogation of the feeder circuit breaker is required for the end fault protection func- tion (Chapter 5.4, page 135) and for low-current circuit breaker failure protection mode (Chapter 5.3.5.2, page 119). Three circuit breaker signals can be recognized: •...
Page 168: Overview Of The Supervisory Functions
Functions Table 5-2 Alarms related to the circuit breaker status Binary input Status of the Alarm circuit breaker CB CLOSE OPEN CLOSED command “CB fault $01” Failure (FNo. 176.1136/CU) Closed Closed “CB fault $01” Closed (FNo. 176.1136/CU) by CLOSE command Open Open “CB fault $01”...
Page 169 Supervisory Functions Monitoring Possible cause and response Permanent monitoring of the program flow After three unsuccessful restart attempts the by means of watchdog (BU, CU) protection is blocked. Differential current supervision Current transformer circuit faulty • Bus zone-selective protection Bus zone-selective blocking | Σ...
Page 170: Setting Notes
Functions Monitoring Possible cause and response Battery monitoring of central units and bay Alarm is generated for the bay unit with "BattSuperv $00" (FNo. 176.1174/CU) units and for the central unit with "Batt. superv CU" (FNo. 10422/CU) and group alarm "Err PROT ACTIVE" (FNo.
Page 171 Supervisory Functions DIF SUP mode BZ The parameter DIF SUP mode BZ (6310/CU) is used to set the response of the pro- tection after pickup of the differential current supervision. With setting alarm only a pickup of the differential current supervision causes only an alarm and not a blocking of the protection.
Page 172 Functions CB supervision Use parameter CB SUP TIME (6315/CU) to set the threshold for the circuit breaker time runtime. If no final position checkback signal is received for the circuit breaker after this time, the protection assumes this circuit breaker to be faulty and issues an alarm. This threshold is determined by the longest circuit breaker runtime to be expected.
Page 173: Settings For The Central Unit
Supervisory Functions 5.5.3 Settings for the Central Unit Addr. Setting Title Setting Options Default Setting Comments out of service Bay status in service Bay status in service maintenance T-BF rel sup 0.02 .. 15.00 sec 15.00 sec Supervision bin. input BF-release T-BF 2chan 0.06 ..
Page 174: List Of Information From The Central Unit
Functions 5.5.4 List of Information from the Central Unit FNo. Alarm Comments 10410 Id-sup CZ Diff-current superv. CZ (group alarm) 10411 Id-sup CZ L1 Diff-current supervision Check Zone L1 10412 Id-sup CZ L2 Diff-current supervision Check Zone L2 10413 Id-sup CZ L3 Diff-current supervision Check Zone L3 10415 Id-sup BZ...
Page 175: List Of Information From The Bay Unit
Supervisory Functions FNo. Alarm Comments 176.1127 FltR $01 $02 Fault: run time $01 isol. $02 176.1128 FltP $01 $02 Fault: dist. pos. $01 isol. $02 176.1133 FltP $01 $02 Fault: dist. pos. $01 isol. $02 176.1171 15V-superv $00 15V supply supervision $00 176.1172 5V-superv $00 5V supply supervision $00 176.1173 0V-superv $00...
Page 176: Oscillographic Fault Recording
Functions Oscillographic Fault Recording 5.6.1 Mode of operation Note A description of the bay unit's fault recording function is provided in Chapter 5.13, page 182. Reading out of oscillographic fault recording data is described in Chapter 6.2.3, page 221. During a fault event, the instantaneous measured values are stored at intervals of 1 = 50 Hz) and 833 µs (f = 60 Hz) in a buffer of the central unit.
Page 177: Setting Notes
Oscillographic Fault Recording 5.6.2 Setting Notes fault rec mode The parameter fault rec mode (6401A/CU) is used to specify the conditions under which oscillographic fault records will be stored. With setting global storage, initiation by CU, fault records will be stored in the central unit and in all bay units if one storage criterion is fulfilled in the central unit.
Page 178: Settings For The Central Unit
Functions 5.6.3 Settings for the Central Unit Addr. Setting Title Setting Options Default Setting Comments 6401A fault rec mode global storage, local initiation global storage, ini- Mode of fault recording global storage, initiation by tiation by CU local storage, local initiation 6404 MAX.
Page 179: Device
Device Device 5.7.1 Mode of operation This section summarizes those annunciations which are not associated with any pro- tection function. 5.7.2 Setting notes TO IV-Bit Use parameter TO IV-Bit T103 (5299A/CU) to set the time that may elapse at the maximum until reception of the synchronization pulse with external synchronization.
Page 180 Functions changed, or output as “Off” again after a parameter set has been completely reloaded and the device is operating with these parameters. The event log information of this annunciation (On/Off) is maintained in case of an in- itial or restart. Relevant information: On, parameter changes on-line from the device or through a pa- rameter setting command.
Page 181: Settings For The Central Unit
Device Event Lost Annunciation: Not all annunciations generated by the device could be stored in the buffer. The cause is probably a buffer overflow. Relevant information (fleeting): On Flag lost Annunciation: Not all annunciations generated by the device which are defined as fault record flags could be stored in the buffer.
Page 182: Power System Data
Functions Power System Data 5.8.1 Mode of operation The SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection needs the data of the power system to match its functions to these data. 5.8.2 Setting Notes FREQUENCY The parameter FREQUENCY (5104/CU) is used to set the rated system frequency. Note The parameter FREQUENCY (7899/BU) can only be set with the bay unit running in stand-alone mode.
Page 183: Protection General
Protection General Protection General This section summarizes general information required by the SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection. 5.9.1 Current-Controlled TRIP Reset For a reset of the TRIP command, it must be ensured that the tripped circuit breaker has actually been opened and that the trip circuit of the bay unit has been interrupted by the circuit breaker auxiliary contact.
Page 184: Operating States "Bay Out Of Service", "Maintenance Mode
Functions 5.9.3 Operating States "Bay Out of Service", "Maintenance Mode" The parameter Bay status (XX12/CU) is used to select the operating status of the bay unit. Bay out of service / The allocation of a feeder current to a selective measuring system (= bus zone) takes in service place due to the disconnector image ("isolator replica").
Page 185: Overcurrent-Controlled Trip Command
Protection General Caution! Bus bar protection with transfer bus The transfer bus condition is characterized by the status: Line disconnector Q9 open, respectively all bus bar disconnectors open and transfer bus dis- connector Q7 closed. If the feeder is in transfer busbar operation, the feeder must not be put "out of service". Maintenance mode During disconnector revisions the feedback does not correspond to the switching sta- tus of the disconnectors (e.g.
Page 186: Feeder-Selective Trip Release
Functions 5.9.5 Feeder-Selective Trip Release The 7SS52 provides the possibility, in the event of a busbar short-circuit, to trip only those feeders for which an additional external criterion is fulfilled. Such a TRIP com- mand release can be provided, for instance, by a pickup of the feeder protection. The TRIP release must be marshalled to a binary output “>TRIP release”...
Page 187: Busbar Tripping Via An External Signal
Protection General 5.9.7 Busbar Tripping via an External Signal Apart from the tripping of bus zones by the busbar protection itself, there is the option of tripping individual bus zones via an external signal. With enclosed switchgear, for example, the output signal of a so-called arc barrier can be coupled in the central unit via a binary input and be used to trip the faulty zone.
Page 188: Setting Notes
Test mode SK The parameter Test mode SK (5108A/CU) is used to activate and deactivate the test mode for the ZPS-SK module (Chapter 8.2.4, page 295). Siemens recommends to block all TRIP commands. With test mode ON, the protection is blocked.
Page 189 Protection General Language BU The parameter Language BU (5111A/CU) is used to select the UI language of the bay units. The language of the annunciations displayed in the central unit is set via the configuration of the central unit. If the bay unit is operated without a central unit, the language is set locally via a parameter (7101/BU).
Page 190: Settings For The Central Unit
Functions 5.9.9 Settings for the Central Unit Addr. Setting Title Setting Options Default Settings Comments out of service Bay status in service Bay status in service maintenance I> TRIP 0.00..25.00 I / In 0.00 I / In Current threshold for TRIP re- lease non existent BF OP MODE...
Page 191: List Of Information From The Central Unit
Protection General 5.9.10 List of Information from the Central Unit $00, .., $03 are variables which will be automatically replaced on entry in the event buffer by $00 Number of the bay unit $01 Bay name $02 Name of the switching element (e.g. isolator or circuit breaker) $03 Name of the bus zone FNo.
Page 192: List Of Information From The Bay Unit
Functions 5.9.12 List of Information from the Bay Unit FNo. Alarm Comments 1156 >CB test >CB test start 1174 CB in Test Circuit breaker test in progress 1181 CB Test Trip Circuit breaker test: General trip 7616 >TRIP release >Trip release 7SS52 V4 Manual C53000-G1176-C182-3...
Page 193: Bay Unit
Bay Unit 5.10 Bay Unit 5.10.1 Functional Description For the functional description of feeder-specific parameters, please refer to the chap- ters: • Circuit Breaker Failure Protection (Chapter 5.3, page 114) − Characteristics for the Circuit Breaker Failure Protection (Chapter 5.3.1, page 114) −...
Page 194: Integrated Operation Of The Bay Unit
Functions 5.11 Integrated Operation of the Bay Unit 5.11.1 Functional Description This section summarizes those parameters by which you choose the UI language of the bay unit and specify the measured values to be displayed in the “standby” display. 5.11.2 Setting Notes LANGUAGE The parameter LANGUAGE (7101/BU) is used to set the UI language of the bay unit.
Page 195: Settings Of The Bay Unit
Integrated Operation of the Bay Unit 5.11.3 Settings of the Bay Unit Addr. Setting Title Setting Options Default Settings Comments 7101 LANGUAGE DEUTSCH ENGLISH Operating language ENGLISH FRANCAIS ESPANOL ITALIANO PYCCK. 7120 OPER.1st L. IL1, IL2, IL3, IE Display of measured values in I-DIFF.
Page 196: Pc Port Of The Bay Unit
Functions 5.12 PC Port of the Bay Unit 5.12.1 Functional Description The device is equipped with an operating interface integrated in the front panel, the so-called PC port. Communication through this port is subject to certain agreements concerning the transmission formation and the transmission rate. The data entered must match the connected device.
Page 197: Settings Of The Bay Unit
PC Port of the Bay Unit 5.12.3 Settings of the Bay Unit Addr. Parameters Setting Options Default Settings Comments 7208 FUNCT. TYPE 1 .. 254 Function type in accordance with VDEW/ZVEI 7211 PC INTERF. DIGSI V3 DIGSI V3 Data format ASCII 7215 PC BAUDRATE...
Page 198: Fault Recording In The Bay Unit ("Local Fault Recording")
Functions 5.13 Fault Recording in the Bay Unit (”Local Fault Recording”) 5.13.1 Functional Description Note A description of the central unit's fault recording function is provided in Chapter 5.6, page 160. Reading out of oscillographic fault recording data is described in Chapter 6.2.3, page 221.
Page 199: Settings Of The Bay Unit
Fault Recording in the Bay Unit (”Local Fault Recording”) T-PRE The parameter T-PRE 7411/BU is used to set the pre-trigger time for starting the fault recording. The pre-trigger time starts at the specified time before the storage cri- terion for fault record storage is fulfilled. The storage criterion is selected with the pa- rameter INITIATION 7402/BU T-POST...
Page 200: Scope Of Protective Functions In The Bay Unit
Functions 5.14 Scope of Protective Functions in the Bay Unit 5.14.1 Functional Description An optional overcurrent protection is provided as a backup protection in the bay units. This protection works independently of the busbar protection function and remains ac- tive even if the link to the central unit is interrupted or if the bay unit is set with the pa- rameter Bay status (XX12/CU) to bay out of service.
Page 201: Settings Of The Central Unit
Scope of Protective Functions in the Bay Unit 5.14.3 Settings of the Central Unit Addr. Setting Title Setting Options Default Settings Comments Bay status out of service in service Bay status in service maintenance 5104 FREQUENCY 50 Hz 50 Hz Nominal frequency 60 Hz 5.14.4 Settings of the Bay Unit...
Page 202: Power System Data Of The Bay Unit
Functions 5.15 Power System Data of the Bay Unit 5.15.1 Functional Description With the bay unit running in stand-alone mode, the user can set the current transform- er starpoint and the minimum time which must elapse before the TRIP command is reset.
Page 203: Settings Of The Central Unit
Power System Data of the Bay Unit T TRIP The parameter T TRIP 1141/BU is used to set the minimum time which must elapse before the TRIP command is reset. This time is started with the output of a TRIP com- mand.
Page 204: Overcurrent Protection In The Bay Unit
Functions 5.16 Overcurrent Protection in the Bay Unit 5.16.1 Functional Description An optional overcurrent protection is provided as a backup protection in the bay units of the distributed busbar and breaker failure protection SIPROTEC 7SS52 V4. This protection works independently of the busbar protection function and remains active even if the link to the central unit is interrupted or if the bay unit is set with the param- eter Bay status (XX12/CU) to bay out of service.
Page 205 Overcurrent Protection in the Bay Unit Figure 5-40 O/C protection for phase currents Figure 5-41 O/C protection for the earth current 7SS52 V4 Manual C53000-G1176-C182-3...
Page 206: Setting Notes
Functions Definite-time over- For the overcurrent stage and/or the high-set current stage, thresholds for the phase current can be set with the parameters I> (1212/BU) or I>> (1202/BU) respectively current protection Each phase current is compared individually with these thresholds, and a phase-se- lective signal is issued if these thresholds are exceeded.
Page 207 Overcurrent Protection in the Bay Unit TI>> The parameter TI>> (1203/BU is used to set the trip time delay for tripping of the high-set current stage (definite-time). The delay time is started when the threshold for the phase currents is exceeded. This threshold is set with the parameter I>> (1202/ BU).
Page 208 Functions The parameter Ip (1214/BU) is used to set the threshold for the phase currents in the overcurrent stage of the inverse-time O/C protection. This parameter is only displayed if the parameter CHARAC. PH (7812/BU ) is set to VERSE TIME. The parameter TIp (1215/BU) is used to set the trip time delay (time multiplier) for the overcurrent stage of the inverse-time O/C protection.
Page 209 Overcurrent Protection in the Bay Unit MEAS.REPET The parameter MEAS.REPET (1506/BU) is used to select whether a repetition of the measurement will be performed for the earth current in the high-set stage. With setting YES the measurement of the earth current in the high-set current stage will be repeated.
Page 210 Functions This parameter is only displayed if the parameter CHARAC. E (7815/BU ) is set to VERSE TIME. TIEp The parameter TIEp (1515/BU) is used to set the trip time delay (time multiplier) for the overcurrent stage of the inverse-time O/C protection. This parameter is only displayed if the parameter CHARAC.
Page 211: Settings Of The Bay Unit
Overcurrent Protection in the Bay Unit 5.16.3 Settings of the Bay Unit Addr. Setting Title Setting Options Default Settings Comments 1201 O/C PHASES O/C protection for phase cur- rents 1202 I>> 0.05 .. 25.00 I 2.00 I Pick-up value of the high-set stage I>>...
Page 212: List Of Information From The Bay Unit
Functions Addr. Setting Title Setting Options Default Settings Comments 1515 TIEp 0.05 .. 10.00 s 0.50 s Time multiplier for earth current 0; +* 1516 RMS FORMAT FUNDAMENTAL FUNDAMENTAL RMS format of the earth current TRUE RMS for inverse time O/C protection 1521 MAN.CLOSE IE>>...
Page 213: User-Defined Annunciations
User-Defined Annunciations 5.17 User-Defined Annunciations 5.17.1 Functional Description The bay unit possesses four user-defined annunciations “Annuciation1” .. 4 (FNo. 7696/BU, 7697/BU, 7698/BU, 7699/BU) that you can define yourself and assign to signal relays, LEDs or command relays. Each user-defined annunciation is allocated to a delay time. The delay times are set with the parameters T-Annunc.1 to T-Annunc.4 (2801/BU, 2802/BU, 2803/ BU, 2804/BU).
Page 214 Functions Figure 5-42 User-define annunciations Note: Do not interconnect the user-defined logic in such a way that the output annuciation is fed back to the input annunciation again (closed loop). In such a case it may become necessary to interrupt the connection to the central unit to correct the parameterization again.
Page 215: Setting Notes
User-Defined Annunciations 5.17.2 Setting Notes T-Annunc.1 The parameters T-Annunc.1 (2801/BU), T-Annunc.2 (2802/BU), T-Annunc.2 T-Annunc.3 (2803/BU) and T-Annunc.4 (2804/BU) are used to set the delay T-Annunc.3 times for the user-defined annunciations 1, 2, 3 and 4. T-Annunc.4 ANN1Inp.No Use parameters ANN1Inp.No to ANN4Inp.No (2831/BU, 2832/BU, 2833/BU, ANN2Inp.No 2834/BU) to set any annunciation numbers (see Appendix A.10, page 383) that can ANN3Inp.No...
Page 216: Settings Of The Bay Unit
Functions 5.17.3 Settings of the Bay Unit Addr. Parameters Setting Options Default Settings Comments 2801 T-Annunc.1 0.00..10.00 s 0.00 s Delay time for 1st user defined annunciation 2802 T-Annunc.2 0.00..10.00 s 0.00 s Delay time for 2nd user defined annunciation 2803 T-Annunc.3 0.00..10.00 s...
Page 217: List Of Information From The Bay Unit
User-Defined Annunciations 5.17.4 List of Information from the Bay Unit FNo. Alarm Comments >Annunc. 1 >User defined annunciation 1 >Annunc. 2 >User defined annunciation 2 >Annunc. 3 >User defined annunciation 3 >Annunc. 4 >User defined annunciation 4 7696 Annunc. 1 User defined annunciation 1 7697 Annunc.
Page 218: Backup Breaker Failure Protection In The Bay Unit
Functions 5.18 Backup Breaker Failure Protection in the Bay Unit 5.18.1 Functional Description If an overcurrent protection function is provided as backup protection in the bay unit, and if the backup breaker failure protection function of the bay unit has been activated with the parameter BackUp CBF (3901/BU), a separate breaker failure protection can be initiated by the bay unit.
Page 219 Backup Breaker Failure Protection in the Bay Unit Figure 5-43 Blocking mechanism for the backup breaker failure protection and backup time overcurrent protection 7SS52 V4 Manual C53000-G1176-C182-3...
Page 220 Functions Figure 5-44 Monitoring of the Starting Binary Inputs of the Backup Protection-BFP 1-pole Figure 5-45 Monitoring of the Starting Binary Inputs of the Backup Protection-BFP 3-pole 7SS52 V4 Manual C53000-G1176-C182-3...
Page 221 Backup Breaker Failure Protection in the Bay Unit Continuation for (1) and (2) see Figure 5-22, page 121 Figure 5-46 CBF protection function of the backup protection 7SS52 V4 Manual C53000-G1176-C182-3...
Page 222: Setting Notes
Siemens therefore recommends to match the value in the bay unit to its counterpart in the central unit.
Page 223: Settings Of The Central Unit
Backup Breaker Failure Protection in the Bay Unit 5.18.3 Settings of the Central Unit Addr. Setting Title Setting Options Default Settings Comments BF BI MODE 1-ch w/o sup 1-ch w sup Binary input mode / supervision 1-ch w sup 2-ch w/o sup 2-ch w sup BF OP MODE non existent...
Page 224: List Of Information From The Bay Unit
Functions 5.18.6 List of Information from the Bay Unit FNo. Alarm Comments 1401 >b.u. CBF on >Switch on back-up breaker fail. prot. 1402 >b.u. CBF off >Switch off back-up breaker fail. prot. 1403 >b.u.CBF blk. >Block back-up breaker failure protect. 1451 b.u.
Page 225: Control During Operation
Control During Operation You will learn in this chapter how to monitor and operate the SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection. You can use the DIGSI Plant Visualization to visually monitor the substation during op- eration. The Plant Visualization enables the measured values and switch states to be displayed in on-line mode.
Page 226: Overview
Control During Operation Overview You can use the 7SS52 V4 for the central operation of the bay units. Central operation means that you can employ DIGSI to manage also the bay units via the central unit. The operating options are listed in Table 6-1, page 210. The central operation of your plant requires a PC with DIGSI installed on it to be con- nected to the central unit.
Page 227 Overview Table 6-1 Overview of the operating options and control options Operating option DIGSI CU opera- BU opera- Chapter logically tor panel tor panel Maintenance mode CU, BU 6.5, page 247 Plant visualization – – 6.6, page 249 Current transformer polarity –...
Page 228: Reading Out Information
Control During Operation Reading Out Information The SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection provides the following information for on-site retrieval or readout via DIGSI: • Annunciations, • Operational measured values, • Fault data. In this chapter we will introduce each of these information types and explain how you can retrieve them, save them to your PC, and acknowledge them.
Page 229 Reading Out Information Displaying event To display event buffers of the central unit (PC linked to central unit) proceed as fol- buffers with DIGSI lows: Open the central unit in the DIGSI Manager. Click the folder Online in the navigation window of the DIGSI Device Configuration. This will open the directory containing the operating functions of the device (see Figure 6-1, page 213).
Page 230: Operational Annunciations
Control During Operation Output relays Annunciations which are allocated to the potential-free output relays according to Chapter 4, page 45 can be output as latched annunciations. The memories of the out- put relays can also be reset by applying the button.
Page 231 Reading Out Information Figure 6-3 Examples of operational annunciations in DIGSI To display operational events of a single bay unit (PC linked to central unit or bay unit) proceed as follows: Open the corresponding bay unit in the DIGSI Manager. Open the window Select annunciations (Figure 6-4, page 215).
Page 232: Fault Events
Control During Operation Figure 6-5 Operational annunciations window DIGSI − Example 6.2.1.2 Fault events Spontaneous an- In the event of a fault the display switches automatically over to the spontaneous an- nunciations nunciations display. The first line is assigned to the annunciation “Device trip M“...
Page 233: Alarm List
Reading Out Information from the PC To read out fault events of the central unit (PC linked to central unit) proceed as fol- with DIGSI lows: Click Trip log. The data window shows a list of power system faults. Double-click an entry in the list view. The corresponding contents of the power sys- tem fault is displayed in another window.
Page 234: General Interrogation
Control During Operation 6.2.1.4 General Interrogation You can use the general interrogation to find out about the current status of the SIPROTEC devices. Note You need DIGSI to read out the results of the general interrogation. from the PC To read out the results of the general interrogation of the central unit (PC linked to with DIGSI central unit) proceed as follows: Click General Interrogation.
Page 235: Statistics
Reading Out Information 6.2.1.6 Statistics Note Statistics annunciations are only available for the bay units. from the PC To read out statistics annunciations of a single bay unit (PC linked to central unit or with DIGSI bay unit) proceed as follows: Open the corresponding bay unit in the DIGSI Manager.
Page 236 Control During Operation from the PC To retrieve operational measured values of the central unit (PC linked to central unit) with DIGSI proceed as follows: Click Measurement. In the navigation window you can now see the different groups of measured values in the subdirectory of Measurement (Figure 6-1, page 213). The measured values are subdivided into the following groups and subgroups: •...
Page 237: Reading Out Fault Data
Reading Out Information Figure 6-9 Select measured values window in DIGSI Figure 6-10 Window of the operational measured values DIGSI − Example 6.2.3 Reading Out Fault Data The fault data of the bay units are stored in the bay units and the fault data of the cen- tral unit are stored in the central unit.
Page 238 Control During Operation DIGSI − Example Figure 6-11 Reading out fault data Note When you retrieve the fault data centralized via DIGSI, the following fault records will not appear in the list view: • If a local fault record is triggered via the backup protection of a bay unit or by the trip of an external breaker failure protection in a bay unit, it will depend on the setting of the parameter fault rec mode (6401A/CU) where additional fault records are created in the system (Chapter 5.6.2, page 161).
Page 239 Reading Out Information In the column Transfer activate the checkboxes of the bay units you wish to read out. The checkboxes of the bay units with the states with participation/ with tripping and with participation/ without tripping are already active. Regardless of whether you have selected bay units for the transmission, the fault data of the central unit are always transmitted.
Page 240 Control During Operation Please read the SIGRA Manual /4/ i f you want to know more about the numerous op- tion SIGRA 4 offers. To retrieve fault data of a single bay unit (PC linked to central unit or bay unit) proceed as follows: Open the corresponding bay unit in the DIGSI Manager.
Page 241: Controlling Device Functions
Controlling Device Functions Controlling Device Functions You have several options for interfering with the SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection during operation to influence individual functions and annunciations. This includes • creating an oscillographic fault record (see Chapter 6.3.1, page 225) •...
Page 242: Blocking
Control During Operation → Click Device Trigger test fault recording... on the menu bar. The window Fault Record Length opens (Figure 6-15, page 226). Enter the desired fault record length and click OK. The fault recording starts. The fault record length must be within the specified limits. Figure 6-15 Fault Record Length dialog box in DIGSI Note You can also trigger the fault recording via the operator panel of the central unit.
Page 243 Controlling Device Functions Blocking the TRIP The busbar-selective blocking of the TRIP command can be done at the central unit command - for the connected bay units as well as at the bay units directly via DIGSI, binary input busbar-selectively or local operation Blocking via the central unit is done with “$03 BlkTrip”...
Page 244 Control During Operation The following figure gives an overview of these function: BF+: CU command (system port, DIGSI, locally) Pr.: BU test function (DIGSI, locally) the BI ">TRIP release" of the BU is only observed if it has been configured. Figure 6-16 Logic for the blocking of the TRIP command 7SS52 V4 Manual C53000-G1176-C182-3...
Page 245 Controlling Device Functions from the PC To block the TRIP command via the central unit (PC linked to central unit) proceed with DIGSI as follows: Click Control in the navigation window. Double-click Tagging in the function selection. The Tagging window opens (see Figure 6-17, page 229).
Page 246: Blocking The Breaker Failure Protection
Control During Operation 6.3.2.2 Blocking the Breaker Failure Protection The external trip of the breaker failure protection can be blocked for the entire protec- tion or busbar-selectively With the external trip of the breaker failure protection blocked, all device-internal pro- tection functions (central unit, bay unit) remain active.
Page 247 Controlling Device Functions The following figure gives an overview of these functions: BF+: CU command (system port, DIGSI, locally) Pr.: BU test function (DIGSI, locally) The enable input is only observed if the operating mode "BF 2-channel" has been configured (param. XX14 BF BI mode). Figure 6-18 Logic for the blocking of the external breaker failure protection tripping 7SS52 V4 Manual C53000-G1176-C182-3...
Page 248: Blocking Of Individual Busbar Sections
Control During Operation from the PC To block the breaker failure protection via the central unit (PC linked to central unit) with DIGSI proceed as follows: Click Control in the navigation window. Double-click Tagging in the function selection. The Tagging window opens (see Figure 6-17, page 229).
Page 249: Saving And Deleting Annunciations
Controlling Device Functions 6.3.3 Saving and Deleting Annunciations Events are stored in the event buffers inside the SIPROTEC device. The same applies for the fault records corresponding to the fault events. Spontaneous indications, to the contrary, are transmitted directly to the computer without buffering in the SIPROTEC device.
Page 250: Deleting Annunciations
Control During Operation Figure 6-19 Saving annunciations − Example Click Save. The annunciations are saved. Proceed analogously to save further en- tries. You cannot save entire annunciations groups for the bay units as is possible for the central unit. 6.3.3.2 Deleting Annunciations from the PC To delete annunciations of the central unit (PC linked to central unit) proceed as fol-...
Page 251: Circuit Breaker Test
Controlling Device Functions Figure 6-20 Deleting annunciations of a bay unit in DIGSI. Click RESETTING STORED DATA. Click Execute. Next a security prompt takes place. Click Yes to delete the data. 6.3.4 Circuit Breaker Test You can test the trip circuits and circuit breakers during operation by applying an on- off circuit via the corresponding bay unit.
Page 252 Control During Operation Figure 6-21 Trip test including circuit breaker from the PC To perform the circuit breaker test with a bay unit (PC linked to central unit or bay unit) with DIGSI proceed as follows: Open the corresponding bay unit in DIGSI Manager. Click Test in the navigation window and select the entry Test in the function selec- tion.
Page 253: Reset Blocking
Controlling Device Functions Click an entry in the list and click Run..Enter the correct password in the box named Password and then click OK. If the password is wrong, you will receive an error message. When the password is cor- rect, the circuit breaker test will be executed.
Page 254: Reset Blocking Of Isolator Fault
Control During Operation 6.3.5.2 Reset Blocking of Isolator Fault Depending on the setting of the parameter ISOL Malfunct (6302/CU), there are dif- ferent options of how the blocking will behave (Chapter 5.5.1.9, page 146). The function is acknowledged by applying “Reset IsoMalBl“ or via binary input “>Reset IsoMalBl“...
Page 255: Read And Set Date / Time
Controlling Device Functions from the PC To initiate an initial start or a restart of the central unit (PC linked to central unit) pro- with DIGSI ceed as follows: → → Click Device Reset or click Device Resume on the menu bar. Activating an initial start or restart can be protected by the password for testing and diagnostics.
Page 256 Control During Operation The identifiers of the clock status (“status bits”) have the following meaning: Not set Clock was not set manually or synchronized after start. If the synchronization is performed via the system port, the transferred time value is marked “invalid” but the cyclical synchronization continues.
Page 257 Controlling Device Functions Display type no. 5 occurs if the synchronization takes place via the system port and the transferred time value has been marked “not set“. Time management You can modify the clock: • by manually setting the clock via the integrated operation or via DIGSI, •...
Page 258 Control During Operation Enter date and time in the corresponding boxes. Observe the correct notation (see Figure 6-26, page 242). Click OK to transfer the specified values into the device. The existing values are modified and the current dialog box closes. dialog box Figure 6-26 Set clock &...
Page 259 Controlling Device Functions Figure 6-28 Example for Time Synchronization & Time Format dialog box in DIGSI Note Date and time can also be set via the operator panel of the central unit. If you want to know more on this topic, please read the System Description /1/. 7SS52 V4 Manual C53000-G1176-C182-3...
Page 260: Feeder Shutdown And Commissioning
Control During Operation Feeder Shutdown and Commissioning For additional information have a look at Chapter 5.9.3, page 168. The bay unit can be put into service or shut down • via DIGSI at the central unit with the parameter Bay status (XX12/CU).
Page 261 Feeder Shutdown and Commissioning Figure 6-29 Bay units window − Example Figure 6-30 Bay status window − Example To put a single bay for the busbar protection out of or into service at the bay unit (PC linked to central unit or to bay unit) proceed as follows: Open the corresponding bay unit in DIGSI Manager.
Page 262 Control During Operation Figure 6-31 Window Test - 4500 COMMUNICATION WITH CENTRAL UNIT To put the bay for the busbar protection out of service, click the function Switching bay out of service and click Run..Next a password prompt takes place. To take the bay for the busbar protection into service, click the function Switching bay in service and click Run..
Page 263: Maintenance Mode
Maintenance Mode Maintenance Mode For additional information have a look at Chapter 5.9.3, page 168. The maintenance mode can be performed individually for each feeder as follows: • via DIGSI at the central unit with the parameter Bay status (XX12/CU). •...
Page 264 Control During Operation Enter the correct password in the box named Password and then click OK. If the password is wrong, you will receive an error message. When the password is cor- rect, the bay will be put into maintenance. 7SS52 V4 Manual C53000-G1176-C182-3...
Page 265: Plant Visualization
Plant Visualization Plant Visualization General The switchgear diagram you have created with the DIGSI Plant Configuration (see Chapter 4.3, page 49) is interpreted and the data set is produced as a result. Further- more, it serves for the visual monitoring of the substation during operation. After the Plant Visualization has been started, the current switchgear diagram is load- ed and displayed.
Page 266 Control During Operation Note The Plant Configuration and the Plant Visualization cannot run simultaneously. Close the Plant Configuration before you start the Plant Visualization. User interface After the Plant Visualization has been started, you see the current switchgear diagram in the application window. The structure of the switchgear diagram is static and cannot be modified i.e.
Page 267 Plant Visualization Display of the Measured value boxes are displayed for the busbars and current transformers each measured values consisting of three fields (phases L1, L2, L3) of the phase currents and always display the current measured value. The first line of each measured value box shows the name of the busbar or of the current transformer.
Page 268 Control During Operation To hide the measured value boxes, proceed analogously. With the measured value boxes hidden, the menu item View → Measured Value Boxes is not checked off and command button is not active. The setting for the display of the measured value boxes is saved and restored after the restart of the Plant Visualization.
Page 269 Plant Visualization Figure 6-35 LED with Information Window UpdatingCycle The visualization in DIGSI is updated cyclically. The clock displayed in the upper right corner shows the current update status. See Figure 6-35, page 253. When the circle is entirely filled up at "12 o'clock" the update has been completed. Plant View and The Plant View corresponds to the actual statuses of the binary inputs CLOSED, Protected View...
Page 270 Control During Operation Figure 6-36 Object properties Isolator Status In a case of fault it is helpful for you to be able to analyze the current isolator and circuit breaker positions at a later point of time. For this purpose, these data are saved and can be selected in DIGSI under Fault Indications and displayed by double-clicking on the fault number.
Page 271: Installation And Commissioning
Installation and Commissioning The installation and commissioning may only be made by experienced commission- ers. They have to be familiar with the commissioning of protection and control sys- tems, with the management of power systems and with the relevant safety rules and guidelines.
Page 272: Installation And Commissioning
Installation and Commissioning Installation and Commissioning Pay attention to the operating conditions according to VDE 0100/ 5.73 and VDE 0105 part 1/7.83. Caution! The modules of digital protection equipment contain electrostatically endangered components. These must not be withdrawn or inserted under live conditions! The modules must be handled with care so that any possibility of damage due to static dis- charges is prevented.
Page 273: Bay Unit
Installation and Commissioning Pull out the module using the handle provided. Make sure to loosen the module safety locks at the upper and lower rail. For the EAZ module proceed as follows: a. Loosen the ribbon cable b. Push aside alternately upper and lower PCB safety locks and c.
Page 274: General Information On The 2-Bay Bus Coupler
Installation and Commissioning 7.1.3 General Information on the 2-Bay Bus Coupler 7.1.3.1 General The coupler bay with the type "2-bay"-coupler is implemented with 2 bay units of the 7SS52. This is necessary when the IO capability of the bay unit (one current trans- former, five isolators) is not sufficient for processing as 1-bay coupler.
Page 275: Bay Bus Coupler With 2 Current Transformers
Installation and Commissioning Maintenance of bay This function is applied during isolator maintenance when the isolator feed-back sig- nals do not correspond with the isolator switching state (e.g. when testing the auxiliary contacts or when the auxiliary supply for isolator status signals is switched off). The feeder remains in service during this time and consequently is part of the busbar protection measurement.
Page 276: Connection
Installation and Commissioning 7.1.3.4 Connection If you have couplers with one transformer, connect the current inputs of the bay units in series per phase (Figure 7-1, page 260). Record the isolator positions according to the configuration via the binary inputs of the single bay units.
Page 277: Checking The Connections
Checking the Connections Checking the Connections The operational preparations according to Chapter 7.1, page 256 must be completed. Warning! The following inspection steps are performed in the presence of dangerous voltages. Only appropriately qualified personnel familiar with and adhering to safety require- ments and precautionary measures may perform these steps.
Page 278: Commissioning
Installation and Commissioning Commissioning WARNING! Hazardous voltages are present in this electrical equipment during operation. Severe personal injury or property damage can result if the device is not handled properly. Only qualified personnel shall work on and around this equipment after becoming thor- oughly familiar with all warnings and safety notices in this instruction manual as well as with the applicable safety steps, safety regulations, and precautionary measures.
Page 279: How To Proceed
Commissioning 7.3.1 How to Proceed Note This manual cannot take into account all possible aspects of the commissioning pro- cedure. The responsibility for a successful commissioning lies with the person who performs it. The following sections lead you through the essential steps of the commissioning. We recommend to commission the protection system and all its functions centrally with DIGSI.
Page 280: Web Monitor
Installation and Commissioning 7.3.2 Web Monitor The Web Monitor makes possible the display of parameters, data and measuring val- ues during installation or during operation. For this it uses Internet technology. This manual describes functions of the SIPROTEC Web Monitor which are specific for 7SS52 only.
Page 281: Functions
Commissioning 7.3.2.2 Functions Figure 7-3 Web-monitor - Basic display The above figure of the device operation view shows a device with its control (keyboard) and display elements (display, LEDs, inscriptions). The device can be operated with the keys shown in the display in the same way as with the sealed keypad on the device.
Page 282 Installation and Commissioning The Web Monitor for 7SS52 allows you to display the firmware versions of the bay units and of the modules of the central unit. In addition, the HDLC status (HDLC = High Level Data Link Control) of the internal serial interfaces can be called. Figure 7-4 Example for the display of the HDLC status of the internal serial interfaces A description of the values (0x00h ...) shown above can be displayed by clicking on "Legend".
Page 283 Commissioning Figure 7-5 Example for the display of the firmware version for the modules of the central unit Figure 7-6 Example for the display of the firmware version for the modules of the bay units 7SS52 V4 Manual C53000-G1176-C182-3...
Page 284: Checking The Switching States Of The Binary Inputs/Outputs
Installation and Commissioning 7.3.3 Checking the Switching States of the binary Inputs/Outputs With DIGSI you can purposeful selectively control individual binary inputs, output re- lays and LEDs of the central unit and the bay unit. In this way you can check, e.g. dur- ing the commissioning, the correct connections to the system.
Page 285 Commissioning Figure 7-7 Dialog box devices in/outputs − Example Changing the oper- To change the operating state of a hardware component, click the corresponding ating state panel in the column Nominal. Before executing the first change of the operating state the password No. 6 is demand- ed (provided that it has been activated).
Page 286 Installation and Commissioning Testing the binary To check the wiring between the plant and the binary inputs of the central unit, you inputs must create in the plant itself the cause for an external and read out the effect at the device itself.
Page 287: Bay Unit
Commissioning 7.3.3.2 Bay Unit With the bay units, the display of their input/output states or the activation/deactivation of relays can be done via DIGSI or via the integrated operation. In the operator tree of the bay units, under the tests, the operator addresses for the test sequence are stated, in the block as of 4700 for the binary inputs and as of 4800 for the relay control.
Page 288 Installation and Commissioning Relay control After having entered the operator address and its confirmation (E key), the password is requested. After having entered the password, the question for the control of the re- lay appears again. After having confirmed again with the E key, the action is carried out.
Page 289: Testing The System Port
Commissioning 7.3.4 Testing the System Port Preliminary re- If the device has a system port and uses this for communicating with a control center, marks you can test with the DIGSI device operation whether indications are correctly trans- mitted. You must avoid to use this test possibility during live operation. Danger! The sending or receiving of annunciations via the system port by means of the test function is a real information exchange between SIPROTEC and the control center.
Page 290 Installation and Commissioning Changing the oper- By clicking one of the buttons in the column Action you will be asked for the password ating state No. 6 (for hardware test menus) After you have entered the password correctly you now can send the indications individually. For this, click the button Send in the corre- sponding line.
Page 291: Control Of The Isolator Replica
Commissioning 7.3.5 Control of the Isolator Replica For test purposes, the isolator positions of all available feeders can be preset indepen- dent of the state of the binary inputs. For this purpose, the system is to be set to test mode via DIGSI.
Page 292 Installation and Commissioning Figure 7-10 Simulation 7SS52 V4 Manual C53000-G1176-C182-3...
Page 293: Switching The Test Mode And The Transmission Block On And Off
Commissioning 7.3.6 Switching the Test Mode and the Transmission Block On and OFF. If the central unit is linked to a central control or storage facility you can influence in some of the available protocols the information which are transmitted to the control center (see table “Protocol Dependent Functions”...
Page 294: Checks With Secondary Values
Installation and Commissioning Checks With Secondary Values 7.4.1 General The operational preparations according to Chapter 7.2, page 261 must be completed. Warning! Hazardous voltages are present in this electrical equipment during operation. Severe personal injury or property damage can result if the device is not handled properly. Only qualified personnel may work on and around this equipment after becoming thor- oughly familiar with all warnings and safety notices in this instruction manual as well as with the applicable safety steps, safety regulations, and precautionary measures.
Page 295: Trip Characteristic Of The Busbar Protection
Checks With Secondary Values Note The measuring accuracy depends on the electric data of the test source used. The accuracy given in Chapter 9, page 311 “Technical data” Test can only be expected when following the reference conditions corresponding to DIN VDE 0435/Teil 303 or IEC 255 and using precision measuring instruments.
Page 296 Installation and Commissioning 1 For testing the diff-current limit for supervisory function (refer to Chapter 7.3.3, page 268) Figure 7-11 Test setup for the trip characteristic of the busbar-selective measuring system Test steps To prevent that the differential current supervision from blocking the protection dur- ing the test switch it off with the parameter DIFF SUPERV (6306/CU).
Page 297: Check Zone
Checks With Secondary Values − I | = k [| I | + | I On the trip characteristic is valid | I Because the currents I and I have a phase displacement of 180°, you have (1 − k) = I (1 + k) or.
Page 298 Installation and Commissioning Figure 7-13 Test setup for the trip characteristic of the check zone. Test steps Prevent the differential current supervision from blocking the protection during the tests switch it off with the parameter DIFF SUPERV (6306/CU). Set the differential current threshold and the stabilization factor for the busbar-se- lective protection and the check zone as desired.
Page 299: Differential Current Monitoring
Checks With Secondary Values 7.4.3 Differential Current Monitoring 7.4.3.1 busbar-selective Protection To check the busbar-selective protection, the busbar-selective protection must be set more sensitive than the check zone so that the supervision of the differential current of the check zone picks up later. Example You want to test the supervision for the busbar-selective protection with the parame- ters for the differential current threshold Id>...
Page 300: Check Zone
Installation and Commissioning 7.4.3.2 Check Zone To test the check zone, the check zone must be set more selective than the busbar- selective protection so that the supervision of the check zone picks up earlier. Example You want to test the supervision of the check zone with the parameters for the differ- ential current threshold Id>...
Page 301: Overcurrent Threshold Tripping
Checks With Secondary Values 7.4.4 Overcurrent Threshold Tripping Example For two feeders the overcurrent limit shall be checked which is set in parameter I>TRIP (XX13/CU). Test setup Arrange the test setup as in Chapter 7.4.2, page 279. Test steps To prevent the differential current supervision from blocking the protection during the test switch it off with the parameter DIFF SUPERV (6306/CU).
Page 302: Delay Time At Operating Mode "Unbalancing" And "I>Query
Installation and Commissioning Test steps To prevent the differential current supervision from blocking the protection during checking switch it off with the parameter DIFF SUPERV (6306/CU). Set the supervision of the breaker failure protection triggering inputs with the pa- rameter BF BI MODE (XX14/CU) to 1-ch w/o sup or 2-ch w/o sup.
Page 303: Checks With Primary Values
Checks With Primary Values Checks With Primary Values The operational preparations according to Chapter 7.4, page 278 must be complet- Warning! Primary tests may only be carried out by qualified persons who are familiar with the commissioning of protection systems, with the management of power systems and the relevant safety rules and guidelines (switching, earthing etc.) Switch on the primary values.
Page 304: Final Check Of The Protection
Installation and Commissioning Repeat the last 3 steps for all configured busbars. At the end of the measurements the differential current must be nearly zero. Read out the differential and stabilizing currents of module ZPS-BSZ1 with DIGSI Plant Visualization or the measured value window with DIGSI. The differential cur- rent must be nearly zero and the stabilizing current must be the sum of all currents.
Page 305: Maintenance And Repair
Maintenance and Repair This chapter is intended both for personnel in charge of operation and for protection engineers. The chapter tells you how to analyze malfunctions of the device, and describes the maintenance and repair procedures that are required to ensure the functioning of the SIPROTEC 7SS52 V4 protection system.
Page 306: Maintenance
Maintenance and Repair Maintenance Warning! Before executing tests or maintenance works it has to be ensured that there arises no danger for personnel and that the tests do not influence station components which are in service. Warning! Hazardous voltages are present in this electrical equipment during operation. Severe personal injury or property damage can result if the device is not handled properly.
Page 307 Maintenance If you want to take additional precautionary measures to prevent the protection from tripping due to an operator mistake, the 7SS52 V4 offers you the following options: − Set the operator menu Control → Taggings → Set → Trip Blocking on the central unit to ON for as long as test currents are applied.
Page 308: Fault Analysis
Maintenance and Repair Fault Analysis Disturbances of digital protection devices are in most cases caused by component failures. Practical experience also shows that environmental conditions may in few cases initiate failure alarm. Such environmental conditions can be e.g. short electromagnetic interference beyond the values guaranteed by the manufacturer. If the protection system or its components are continuously disturbed, the green LED (RUN) goes out, the red LED (ERROR) lights up and the "Device operative / healthy"...
Page 309: Checking The Auxiliary Voltage Supply
Fault Analysis If failures are detected in the bay unit, they are indicated with their bay number. It is then possible to locate the failure more precisely within the bay. Operational events which support identification of a failure are e.g.: •...
Page 310 Maintenance and Repair Module Table 8-1 LEDs of the ZPS-SBK module ZPS-SBK LEDs Status GREEN YELLOW1 YELLOW2 YELLOW3 • • ⊗ ∇ Operational status • • • ⊗ Failure status (diagnosis by means of fault buffer required) ∇ bright • ⊗...
Page 311: Analysis Of Internal Communication Failures
Fault Analysis The green LED shines when the module is running without faults. The red LED is lit in the event of a module failure. In the event of failure of a configured bay, but normal function of the module, the green LED flashes in addition to the shining red LED. Reset of the ZPS To reset a central processor module (ZPS): modules...
Page 312 You can retrieve a quick and clear overview of the current communication status for the individual bay units via the Web Monitor under SIEMENS Internal Diagnostics → HDLC State (see Figure 7-4, page 266). Test mode of the To further locate the failure, switch the ZPS-SK module to test mode. The protection SK module processing is the same as in normal mode, but more tolerant to errors.
Page 313 Fault Analysis Double-click in the navigation window of the DIGSI Device Configuration the folder Online. This will open the directory containing the operating functions of the device (see Figure 6-1, page 213). Click Parameters. The function selection now shows the groups of parameters. Double-click Parametergruppe.
Page 314 Maintenance and Repair Testing the The functionality of the FO interface can be tested. Before carrying out test, the FO FO interface connection to the central unit must be disconnected and at the bay unit, the receiver must be bridged with the transmitter via an optical fibre. The test function of the bay unit can be started via the membrane keypad or with DIGSI.
Page 315: Troubleshooting
System I-face –> Reset –> Siemens intern –> Figure 8-2 Monitor mode shown in the device display − Connect the serial port of your PC with the PC port of the central unit, and start DIGSI. − Select in the menu bar under Device the option Initialize Device (Figure 8-3, page 299).
Page 316 Maintenance and Repair − Enter password No. 7 for the parameter set. The text in the device display disappears for a moment. After successful initialization, the LED indicate normal operation again, and the default image is shown in the display. The device- specific settings have been reloaded into the device, provided that they were saved on the PC during commissioning.
Page 317 Troubleshooting Figure 8-4 Reading out device information in DIGSI − Example 7SS52 V4 Manual C53000-G1176-C182-3...
Page 318: Repair
Maintenance and Repair Repair Siemens strongly recommends to refrain from repairing units or modules, because they contain especially selected components, which must be handled according to the regulations for EED (Electrostatically Endangered Devices). Most importantly, special techniques are required for working with the printed circuit boards, so that the flow- soldered boards and sensitive components are not damaged.
Page 319: Replacing The Buffer Battery
Repair 8.4.1 Replacing the Buffer Battery The annunciations and fault record data of the device are saved in the RAM. The RAM and the internal system clock with calendar are protected against voltage failures with a buffer battery. To maintain this information in case of a voltage failure, a buffer battery must be fitted.
Page 320 Maintenance and Repair Battery Cable binder D-CPU communication module Figure 8-5 Front view after removing the front panel, and location of the buffer battery Use the cable binder to pull the spent battery out from its snap-in holder. Remove the cable binder from the old battery and fasten it to the new battery. Press the new battery firmly into its snap-in holder (see Figure 8-5, page 304).
Page 321 Repair Bay unit To replace the battery in the bay unit: Loosen the screws and swing open the front panel to the left. The battery is located on the bottom front of the PFE module (Figure 8-6, page 305). Figure 8-6 Front view after removing the front panel, and location of the buffer battery 7SS523 Figure 8-7 Front view after removing the front panel, and location of the buffer battery 7SS525...
Page 322: Replacing The Fine-Wire Fuse
Maintenance and Repair Remove the cable binder from the old battery and fasten it to the new battery. Press the new battery firmly into its snap-in holder (see Figure 8-6, page 305 or Figure 8-7, page 305). Observe the correct battery polarity! Close the front cover and fasten it again to the housing with the screws.
Page 323 Repair should be placed vertically on a conductive surface. Such a conductive surface could be e.g. an EMC mat. Replace the fine-wire fuse. The location of the fine-wire fuse can be seen in Figure 8-8, page 307. Insert the module again into the housing. Make sure that the module is fixed correctly and firmly contacted with the rear-side plug connector.
Page 324 Maintenance and Repair Insert the module again into the housing. Make sure that the module is fixed correctly and firmly contacted with the rear-side plug connector. Re-establish the electrical connections with the power supply, and fasten the front panel again. After fastening the front panel, switch the device on.
Page 325: Startup With A Defective Bay Unit / Defective Fiber-Optic Cable
Repair 8.4.3 Startup with a Defective Bay Unit / Defective Fiber-Optic Cable The protection system can be started up even if a bay has failed (defective bay unit or defective fiber-optic cable). The system first starts up, and the whole protection is blocked. This happens regardless of the setting of parameter BLOCKING MODE (6305/CU).
Page 326 Maintenance and Repair 7SS52 V4 Manual C53000-G1176-C182-3...
Page 327: Technical Data
Technical Data This chapter describes the technical specifications of the SIPROTEC 7SS52 V4 dis- tributed busbar and breaker failure 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 328: General Data
Technical Data General Data TRIP command Minimum duration of TRIP command 0.02 to 1.00 s (in steps of 0.01) Minimum current limit for reset of signal I / I 0.20 to 2.00 (in steps of 0.1) Overcurrent Setting range I / I 0.00 to 25.00 (in steps of 0.1) release of TRIP signals...
Page 329: General Device Data
General Device Data General Device Data 9.2.1 Analog Inputs and Outputs Rated frequency 50 Hz or 60 Hz (settable) Current inputs Rated current 1 A or 5 A Thermal overload capability of current path 4 × I – continuous 30 × I –...
Page 330: Binary Inputs
Technical Data 9.2.3 Binary Inputs Number – Central unit – Bay unit 20 [10] Voltage range DC 24 to 250 V (thresholds selectable by plug-in jumpers) Nominal control voltage DC 24; 60; 110; 220 V 0.8 × U Pick-up threshold 0.65 ×...
Page 331: Trip Contacts
General Device Data 9.2.5 Trip Contacts Bay unit Number of relays 4 [3] (each 2 NO contacts) 1 [2] (1 NO contact) Switching capacity – CLOSE 1000 W / VA – OPEN 30 W/ VA Switching voltage AC / DC 250 V Permissible current: –...
Page 332: Serial Ports
Technical Data 9.2.8 Serial Ports Central unit PC port (front) − Connection electrical D-SUB 9-pole − Baud rate 4800 to 115000 bauds System port (rear) IEC 60870-5-103 – Connection optical ST connectors – Baud rate 4800 to 115000 bauds System port (rear) IEC 61850, electrical with EN100 –...
Page 333: Busbar Protection
General Device Data 9.2.9 Busbar Protection Characteristic Stabilized differential current measurement Setting ranges Overcurrent I / I 0.20 to 4.00 (in steps of 0.01) Stabilizing factor for bus section-selective protection 0.10 to 0.80 (in steps of 0.01) Stabilizing factor for the check zone 0.00 to 0.80 (in steps of 0.01) Diff-current...
Page 334: Circuit Breaker Failure Protection
Technical Data 9.2.10 Circuit Breaker Failure Protection Control modes One or two-channel initiation Modes of operation Individually selectable per feeder: − I>query − TRIP repeat (1/3-phase) with I>query − Unbalancing (1-stage CBF) − Unbalancing with TRIP repeat (1-/3-phase, 2-stage CBF) −...
Page 335: Overcurrent Protection In The Bay Unit
General Device Data 9.2.11 Overcurrent Protection in the Bay Unit Characteristic Definite or inverse time overcurrent protection Setting ranges High-set stage I>> (phase) I / I 0.05 to 25.00 (in steps of 0.01) High-set stage IE>> (earth) I / I 0.05 to 25.00 (in steps of 0.01) ∞...
Page 336 Technical Data Figure 9-1 Trip time characteristics of the inverse-time overcurrent protection, in acc. with IEC 255-3 7SS52 V4 Manual C53000-G1176-C182-3...
Page 337: Auxiliary Functions
General Device Data 9.2.12 Auxiliary Functions Self-diagnosis – Current monitoring per feeder – Auxiliary voltage monitoring – Cyclic test – Check of the data transmission between central unit and bay units – Memory tests Operational Feeder currents measured values in A primary, Central unit in % I (feeder transformer) and...
Page 338: User-Configurable Functions (Cfc)
Technical Data (up to 8 fault records) Capture Time max. 5s (total) 9.2.13 User-Configurable Functions (CFC) Function Module Comment ABSVALUE Formation of absolute value Addition ALARM Alarm AND gate BLINK Flash Block BOOL_TO_CO Boolean to command, conversion BOOL_TO_DI Boolean to double-point indication, conversion BOOL_TO_IC Boolean to internal single-point indication, conversion BUILD_DI...
Page 339: Electrical Tests
Council Directive in agreement with the generic standards EN 61000-6-2 and EN 61000-6-4 (for EMC directive) and with the standard EN 60255-6 (for Low Voltage Directive) by Siemens AG. The device is designed and manufactured for application in industrial environment.
Page 340 Technical Data EMC tests for Standards: IEC 60255-6 and -22, (product standards) immunity EN 61000-6-2 (generic standard) (type tests) VDE 0435 Section 301, DIN VDE 0435-110 2.5 kV (peak); 1 MHz; τ = 15 µs; – High-frequency test IEC 60255-22-1, Class III and 400 pulses per s;...
Page 341: Mechanical Tests
General Device Data EMC tests for noise Standard: EN 61000-6-4 (generic standard) emission – Radio disturbance voltage on lines, 150 kHz to 30 MHz only auxiliary voltage limit value class B IEC-CISPR 22 – Disturbance field intensity 30 MHz to 1000 MHz IEC-CISPR 11 limit value class A 9.2.15 Mechanical Tests...
Page 342: Climatic Stress Tests
Technical Data 9.2.16 Climatic Stress Tests Warning! Commissioning at temperatures ≤ 0 °C may only be performed if plant conditions en- sure that no command/trip outputs can be activated until the modules have reached their minimum permissible service temperature. Temperatures Standard: IEC 60255–6 Permissible ambient temperature...
Page 343: Service Conditions
General Device Data 9.2.17 Service Conditions The relay is designed for use in industrial environment, for installation in standard re- lay rooms and compartments so that with proper installation electro-magnetic compat- ibility (EMC) is ensured. The following should also be heeded: •...
Page 344: Mcbs For Device 7Ss52X
Technical Data 9.2.19 MCBs for Device 7SS52x The miniature circuit breaker have one tripping characteristic for thermal overload as well as one for short circuits ( for magnetic trip actuator). For the dimensioning of overload, the continuous as well as momentary current has to be taken into consideration.
Page 345: Dimensions
Dimensions Dimensions 9.3.1 Central Unit Figure 9-2 Mechanical dimensions of the subrack If you use the optionally available spacer angles, the installation depth will be reduced by 40 mm. 7SS52 V4 Manual C53000-G1176-C182-3...
Page 346 Technical Data Figure 9-3 Connection plugs (rear view) of the subrack 7SS52 V4 Manual C53000-G1176-C182-3...
Page 347: Bay Unit
Dimensions 9.3.2 Bay Unit Figure 9-4 Dimensional drawing of 7XP20 for panel surface mounting 7SS523 (all dimensions in mm) 7SS52 V4 Manual C53000-G1176-C182-3...
Page 348 Technical Data Figure 9-5 Dimensional drawing of 7XP20 for panel or cubicle flush mounting 7SS523 (all dimensions in mm) 7SS52 V4 Manual C53000-G1176-C182-3...
Page 349 Dimensions Figure 9-6 Dimensional drawing of 7XP20 for panel or cubicle flush mounting 7SS525 (all dimensions in mm) 7SS52 V4 Manual C53000-G1176-C182-3...
Page 350 Technical Data Figure 9-7 Connection plugs (rear view) for flush-mounted casing 7SS523 7SS52 V4 Manual C53000-G1176-C182-3...
Page 351 Appendix This appendix contains ordering information, general diagrams and connection dia- grams, tabular listings of all settings and information of the distributed busbar and fail- ure protection SIPROTEC 7SS52 V4 for the full scope of device functions. Data for Selection and Ordering Basis for Selection of the Stabilization Factor k Connection Diagrams Settings −...
Page 352: A.1 Data For Selection And Ordering
Appendix Data for Selection and Ordering Table A-1, page 336 to Table A-3, page 338 gives an overview of the available vari- ants of the components (central unit, bay units) of the protection system SIPROTEC 7SS52 V4 and their ordering codes. Necessary ancillary devices with corresponding ordering codes are added.
Page 353: A.1.2 Bay Units
Data for Selection and Ordering Table A-1 Selection and ordering data for central unit Order No. ❏ 0 - ❏ ❏ ❏ ❏ ❏ - 1 ❏ A 0 7 S S 5 2 Distributed busbar and breaker failure protection SIPROTEC 7SS52 V4 CENTRAL UNIT Service interface (rear port)
Page 354: A.1.3 Accessories
Appendix Table A-3 Selection and ordering data for bay unit 7SS525 Order No. 5 ❏ - - ❏ A A 1 7 S S 5 2 5 F A 0 1 Distributed busbar and breaker failure protection SIPROTEC 7SS52 V4 BAY UNIT System version 50/60 Hz...
Page 355 Data for Selection and Ordering Table A-5 Ordering data for PC communication software DIGSI ANCILLARY COMPONENTS Order No.. PC communication software DIGSI, Basic 7 X S 5 4 0 0 - 0 A A 0 0 German, English PC communication software DIGSI, Professional 7 X S 5 4 0 2 - 0 A A 0 0 (Basic and all optional packets, incl.
Page 356 Appendix Table A-7 Selection and ordering data for FO connections ANCILLARY COMPONENTS Order No. Fiber-optic connections central unit - bay units ❏ ❏ ❏ FO-Duplex outdoor cable 2G62,5/125, 2 fibers, 6 X V 8 1 0 0 - ST-plugs on both sides ❏...
Page 357: A.2 Basis For Selection Of The Stabilization Factor K
Basis for Selection of the Stabilization Factor k Basis for Selection of the Stabilization Factor k In a first step, the relationship between the point (in time) at which saturation occurs and the stabilization factor is established. The following condition must be fulfilled in order to prevent bus zone tripping for an external fault (see Figure A-1, page 341): sin ωT ×...
Page 358: A.3 Connection Diagrams
Appendix Connection Diagrams Legend: Binary Input Check zone Bay unit I-DIFF: Differential current I-SUM: Summation current Circuit breaker Alarm reley Bus zone Breaker failure ISO: Isolator Central unit Figure A-3 Connection diagram central unit (continued in Figure A-4, page 343) 7SS52 V4 Manual C53000-G1176-C182-3...
Page 359 Connection Diagrams Figure A-4 Connection diagram central unit (continued from Figure A-3, page 342) 7SS52 V4 Manual C53000-G1176-C182-3...
Page 360 Appendix D-SUB Connectors PC port Service port (F) Time synchronizing port (E) RS 232 RS 485 Shield electrically connected with collar − − − P24_TSIG − P5_TSIG A/A’ (RxD/TxD−N) M_TSIG − − − − − C/C’ (GND) − − − −...
Page 361 Connection Diagrams *) Table A-28 “Marshalling TRIP RELAY” show the default assignment of relay K1 - K5. Legend: Binary Input Trip relay Circuit breaker Alarm reley Breaker failure Figure A-5 Connection diagram bay unit 7SS523 7SS52 V4 Manual C53000-G1176-C182-3...
Page 362 Appendix *) Table A-32 “Marshalling TRIP RELAY” show the default assign- ment of relay K1 - K5. Legend: Binary Input Trip relay Circuit breaker Alarm reley Figure A-6 Connection diagram bay unit 7SS525 7SS52 V4 Manual C53000-G1176-C182-3...
Page 363 Connection Diagrams D-SUB connectors PC port Shield electrically connected with collar − − − − − − Connections for The transmit and receive connections of the FO cables are identified by the symbols for transmit (output) and for receive (input). 7SS52 V4 Manual C53000-G1176-C182-3...
Page 364: A.4.1 Settings Of The Zps Modules
Appendix Settings − Central Unit A.4.1 Settings of the ZPS Modules ZPS module up to There are two different releases of the ZPS modules available. Figure A-7, page 348 release 7SS52 ../GG shows the layout of the printed circuit board for devices up to release 7SS522.../GG, whereas Figure A-8, page 350 depicts the layout for devices of release 7SS52.../HH and higher.
Page 365 − Settings Central Unit It is recommended to verify the switch positions and jumpers before fitting the module. In Table A-8, page 349 and Table A-9, page 349 of the appendix the settings are list- Table A-8 Jumper settings for the ZPS module ZPS Functions Jumper BSZ 1...
Page 366 Appendix ZPS2 module The ZPS2 module can be used as master (ZPS-SBK) or slave (ZPS-BSZ or ZPS-SK) of release 7SS52 ../ in a multi-processor system. The C53207-A361-B28-1 module can be applied univer- HH and higher sally as ZPS-SK, ZPS-SBK and ZPS-BSZ. Each module is assigned its particular task unambiguously by means of jumpers.
Page 367 − Settings Central Unit Table A-10 Jumper settings for the ZPS2 module ZPS2-Functions Jumper BSZ 1 BSZ 2 BSZ 3 SK 1 SK 2 SK 3 SK 4 SK 5 SK 6 7SS52 V4 Manual C53000-G1176-C182-3...
Page 368: A.4.2 Settings Of The Eaz Module
Appendix A.4.2 Settings of the EAZ Module Figure A-9 Jumper layout on the EAZ module Table A-11 Jumper settings for the EAZmodule Connector Jumper Not installed X11 to X17 Jumpers for the setting of the control voltage (see Table A-12, page 353) X21 to X27 X31 to X37 7SS52 V4 Manual...
Page 369 − Settings Central Unit Table A-12 Jumper settings for different control voltages of the binary inputs of the EAZ module Setting for nominal control voltage Name 24 V 60 V 110 V 220 V BI1 to BI5 (on module D-CPU, Table A-15, page 355) BI10 BI11 BI12...
Page 370: A.4.3 Jumper Settings Of The D-Cpu Module
Appendix A.4.3 Jumper Settings of the D-CPU Module Figure A-10 Location of the jumpers on the D-CPU module The service port can be configured as RS232, RS485 or as optical interface. Insert the jumpers according to Table A-14, page 355. The Ethernet interface module EN100 has no plug-in jumpers.
Page 371 − Settings Central Unit Note The jumpers settings on the connectors X103 and X104 must always be the same, i.e. either both on 1-2 or both on 2-3. Table A-14 Jumper settings (service port) for the D-CPU-module Connector Jumper RS232 RS485 optical X103...
Page 372: A.5.1 Settings Of The Pfe Module
Appendix Jumper Settings − Bay Unit A.5.1 Settings of the PFE Module Figure A-11 Location of the jumpers on the PFE module Table A-16 Jumper settings for the PFE module Connector Jumper Not installed Not installed Not installed 7SS52 V4 Manual C53000-G1176-C182-3...
Page 373: A.5.2 Settings Of The Svw Module
− Jumper Settings Bay Unit A.5.2 Settings of the SVW Module Figure A-12 No jumpers on the SVW module 7SS52 V4 Manual C53000-G1176-C182-3...
Page 374: A.5.3 Settings Of The Saf Module
Appendix A.5.3 Settings of the SAF Module Figure A-13 No jumpers on the SAF module 7SS52 V4 Manual C53000-G1176-C182-3...
Page 375: A.5.4 Settings Of The Afe Module
− Jumper Settings Bay Unit A.5.4 Settings of the AFE Module Figure A-14 No jumpers on the AFE module 7SS52 V4 Manual C53000-G1176-C182-3...
Page 376: A.5.5 Settings Of The Efe Module
Appendix A.5.5 Settings of the EFE Module Figure A-15 Location of the jumpers on the EFE module Table A-17 Jumper settings for the EFE module Connector Jumper X35 to X94 Jumpers for the voltage setting, see Table A-18, page 361 X2 (wire jumper) Not installed X95 (wire jumper)
Page 377 − Jumper Settings Bay Unit Table A-18 Jumper settings for different control voltages of the binary inputs of the EFE module Setting for nominal control voltage Name 24 V 60 V 110 V 220 V BI 1 BI 2 BI 3 BI 4 BI 5 BI 6...
Page 378: A.5.6 Settings Of The Efe_10 Module
Appendix A.5.6 Settings of the EFE_10 Module Figure A-16 Location of the jumpers on the EFE_10 module Table A-19 Jumper settings for the EFE_10 module Connector Jumper X35 to X58 and Jumpers for the voltage setting, see Table X74 to X79 A-20, page 363 X2 (wire jumper) Not installed...
Page 379 − Jumper Settings Bay Unit Table A-20 Jumper settings for different control voltages of the binary inputs of the EFE_10 module Setting for nominal control voltage Name 24 V 60 V 110 V 220 V BI 1 BI 2 BI 3 BI 4 BI 5 BI 6...
Page 380: A.6 Protocol-Dependent Functions
Appendix Protocol-Dependent Functions Table A-21 Protocol dependent functions Function IEC 60870-5-103 IEC 61850 (EN100) Protocol Protocol Operational measured values Fault recording Protection setting by remote control User-defined indications and switching objects Time synchronization Annunciation with time stamp Commissioning Aids • Alarm and Measured Value Transmission Blocking •...
Page 381: A.7 Parameter Listing - Central Unit
Parameter Listing - Central Unit Parameter Listing - Central Unit In the running text of the manual, "XX" is usually used as variable for the first digit (number of the bay unit) of the parameters 106A to 156A (XX12 instead of 112). Addr.
Page 382 Appendix Addr. Setting Title Function Setting Options Default Setting Comments 5299A TO IV-Bit T103 Device 0 .. 1500 min 1380 min Timeout IV-Bit T103 5401 PROT TR BUS Protec. general Selective protection for transfer busbar 6101 STAB FAC:BZ BB Protection 0.10 ..
Page 383: A.8 Parameter Listing - Bay Unit
Parameter Listing - Bay Unit Parameter Listing - Bay Unit Addr. Setting Title Function Setting Options Default Setting Comments 1101 CT STARPNT Power System TOWARDS LINE TOWARDS LINE Current transformer polarity Data TOWARDS BUSBAR 1105 In PRIMARY Power System 10..20000 A 400 A Primary Rated current Data...
Page 384 Appendix Addr. Setting Title Function Setting Options Default Setting Comments 1516 RMS FORMAT O/C Protection FUNDAMENTAL FUNDAMENTAL RMS format for inverse time O/C Earth TRUE RMS protection 1521 MAN.CLOSE O/C Protection IE>> UNDELAYED IE>> UNDELAYED Overcurrent stage valid for phase Earth IE>/IEp UNDELAY.
Page 385 Parameter Listing - Bay Unit Addr. Setting Title Function Setting Options Default Setting Comments 4402 CB TRIP Tests Circuit breaker trip test 1pole L2 4403 CB TRIP Tests Circuit breaker trip test 1pole L3 4404 CB TRIP Tests Circuit breaker trip test 3pole 4501 Com.
Page 386 Appendix Addr. Setting Title Function Setting Options Default Setting Comments 5705 IL1 = Operational Current in phase L1 = measured values 5706 IL2 = Operational Current in phase L2 = measured values 5707 IL3 = Operational Current in phase L3 = measured values 5708 IE =...
Page 387 Parameter Listing - Bay Unit Addr. Setting Title Function Setting Options Default Setting Comments 7122 OPER.2nd L. Integrated Opera- IL1, IL2, IL3, IE Display of measured values in the tion I-DIFF. L1, I-DIFF. L2, 2nd line of the quiescent-state indi- I-DIFF.
Page 388 Appendix Addr. Setting Title Function Setting Options Default Setting Comments 7411 T-PRE Fault Recordings 0.05..0.50 s 0.20 s Pre-trigger time for fault recording 7412 T-POST Fault Recordings 0.05..0.50 s 0.20 s Post-fault time for fault recording 7431 T-BINARY IN Fault Recordings 0.10..5.00 s 0.40 s Storage time by initiation via binary...
Page 389: A.9 List Of Information - Central Unit
List of information - Central Unit List of information - Central Unit Indications for IEC 60870-5-103 are always reported as ON / OFF if they are subject to general interrogation for IEC 60870-5-103. If not, they are only reported as ON. New user-defined indications or such newly allocated to IEC 60 870-5-103 are set to ON / OFF and subjected to general interrogation if the information type is not a spon- taneous event (".._W").
Page 390 Appendix 3. column ”IEC 60870-5-103“: Column ”Type“ (Function Bus Zone): Information that belong to the bus zones are of type 207. In this type up to 256 information numbers can be addressed. The type is divided into 12 blocks with 21 information numbers each. The blocks are assigned to the bus zones.
Page 391 List of information - Central Unit Column ”Type“ (Function Bay Unit): Informationen that belong to the bay units are of types 195 to 206. In these types up to 256 information numbers can be addressed. These types are divided into 4 blocks each with 63 information numbers each. The blocks are assigned to the bay units.
Page 392 Appendix FNo. Description Function Type Log-Buffer Configurable in Matrix IEC 60870-5-103 ofIn- for- matio >Synchronize Internal Real Time Device SP_E LED BI Clock (>Time Synch) >Trigger Waveform Capture Osc. Fault Rec. LED BI (>Trig.Wave.Cap.) >Reset LED (>Reset LED) Device LED BI >Test mode (>Test mode) Device LED BI...
Page 393 List of information - Central Unit FNo. Description Function Type Log-Buffer Configurable in Matrix IEC 60870-5-103 ofIn- for- matio 10415 Diff-current superv. BZ (group Monitoring alarm) (Id-sup BZ 10416 Diff-current superv. BZ L1 (group Monitoring alarm) (Id-sup BZ L1 G) 10417 Diff-current superv.
Page 394 Appendix FNo. Description Function Type Log-Buffer Configurable in Matrix IEC 60870-5-103 ofIn- for- matio 10446 Trip command L1 (group alarm) BB Protection (Trip L1 10447 Trip command L2 (group alarm) BB Protection (Trip L2 10448 Trip command L3 (group alarm) BB Protection (Trip L3 10449...
Page 395 List of information - Central Unit FNo. Description Function Type Log-Buffer Configurable in Matrix IEC 60870-5-103 ofIn- for- matio 10490 >Blocking back-up breaker BF-Protection LED BI fail.prot. BU (>Block BF of BU) 10491 Blocking back-up breaker BF-Protection IntSP fail.prot. BU (Block BF of BU) 10492 Back-up breaker fail.prot.
Page 396 Appendix FNo. Description Function Type Log-Buffer Configurable in Matrix IEC 60870-5-103 ofIn- for- matio 176.1112 Fault: run time $01 isol. $02 (FltR $01 $02) 176.1113 Fault: dist.pos. $01 isol. $02 (FltP $01 $02) 176.1115 $01 Isolator $02 ($01 $02) 176.1117 Fault: run time $01 isol.
Page 397 List of information - Central Unit FNo. Description Function Type Log-Buffer Configurable in Matrix IEC 60870-5-103 ofIn- for- matio 176.1195 CT reversed polarity $00 (TF RevPol $00) 176.1339 Block Trip command BB by $00 (BlkTripBB $00) 176.1349 Block BF protection BB by $00 (BlkBF BB $00) 176.1365 Timing error back-up BF inp $00...
Page 398 Appendix FNo. Description Function Type Log-Buffer Configurable in Matrix IEC 60870-5-103 ofIn- for- matio 177.1360 >Trip command for $03 (>Trip Protection Zone LED BI $03) 177.1361 Timing error ext. Trip command Protection Zone $03 (TripBIErr $03) 177.1362 No release of Trip command $03 Protection Zone (noTripRel $03) 177.1363...
Page 399: A.10 List Of Information - Bay Unit
List of Information - Bay Unit A.10 List of Information - Bay Unit FNo. Short Text Logical Function Log Buffers Configurable IEC 60870-5-103 in Matrix >Time Synchro >Time synchronization >Start FltRec >Start fault recording >LED reset >Reset LED indicators >Annunc. 1 >User defined annunciation 1 on/off >Annunc.
Page 400 Appendix FNo. Short Text Logical Function Log Buffers Configurable IEC 60870-5-103 in Matrix Common alarm Common alarm on/off I supervision Measured value supervision of currents Fail.Battery Failure: Battery on/off Flt.RecDatDel Fault recording data deleted Flt.Rec.viaBI Fault recording initiated via bin.input Flt.Rec.viaKB Fault recording initiated via keyboard Flt.Rec.viaPC...
Page 401 List of Information - Bay Unit FNo. Short Text Logical Function Log Buffers Configurable IEC 60870-5-103 in Matrix 1453 b.u. CBF act. Back-up breaker failure prot. is active 1455 b.u. CBF flt. Back-up breaker fail. prot.: fault det. 1471 b.u. CBF Trip Trip by back-up breaker failure prot.
Page 402 Appendix FNo. Short Text Logical Function Log Buffers Configurable IEC 60870-5-103 in Matrix 1783 Fault L123 O/C fault detection L1-L2-L3 1784 Fault L123E O/C fault detection L1-L2-L3-E 1785 Fault E O/C fault detection E only 1791 O/C Gen.Trip O/C general trip command 1800 I>>...
Page 403 List of Information - Bay Unit FNo. Short Text Logical Function Log Buffers Configurable IEC 60870-5-103 in Matrix 7612 >CBF L2 >Circuit breaker failure start phase L2 7613 >CBF L3 >Circuit breaker failure start phase L3 7614 >CBF puls >Circuit breaker failure pulse 7615 >CBF release >Circuit breaker failure release...
Page 404 Appendix FNo. Short Text Logical Function Log Buffers Configurable IEC 60870-5-103 in Matrix 7672 IDL1 = BZ: Differential current phase L1 7673 IDL2 = BZ: Differential current phase L2 7674 IDL3 = BZ: Differential current phase L3 7675 ISL1 = BZ: Stabilising current phase L1 7676 ISL2 =...
Page 405: A.11 Group Alarms - Central Unit
Group Alarms - Central Unit A.11 Group Alarms - Central Unit Abbreviations $00, .., $03 are variables which are replaced automatically with $00 Number of the bay unit $01 Bay name $02 Name of the switching element (e.g. Isolator or circuit breaker) $03 Name of the bus zone BUnn Bay number 01 to 48 BSZz Modules for protection processing BSZ1, BSZ2, BSZ3...
Page 406 Appendix Group Alarm Alarm FNo. Description FNo. Logical function Relates to 10449 Trip command BBP 177.1342 Trip command for $03 L1 BZnn 177.1343 Trip command for $03 L2 BZnn 177.1344 Trip command for $03 L3 BZnn 10436 Trip command BF 177.1352 Trip command BF for $03 phase L1 BZnn...
Page 407 Group Alarms - Central Unit Group Alarm Alarm FNo. Description FNo. Logical function Relates to 10424 Supply voltage superv. BU 176.1171 15V supply supervision $00 BUnn 176.1172 5V supply supervision $00 BUnn 176.1173 0V supply supervision $00 BUnn 10443 BZ blocked selective (g. a.) 177.1333 Blocked by fault $03 BZnn...
Page 408: A.12 Group Alarms - Bay Unit
Appendix A.12 Group Alarms - Bay Unit Group Alarm Alarm FNo. Description FNo. Logical function General internal failure of device Only existing alarm is 161. Measured value supervision of cur- Standard-Group Alarms for all Measured Value rents Supervisions. On BU the summation current will be monitored.
Page 409: A.13 Measured Value List - Central Unit
Measured Value List - Central Unit A.13 Measured Value List - Central Unit Abbreviations $00, .., $03 are variables which are replaced automatically by Comments $00 Number of the bay unit $01 Bay name $02 Name of the switching element (e.g. isolator or circuit breaker) $03 Name of the bus zone Column Function: Checkzone I is not allocateable to the control center.
Page 410: A.14 Measured Value List - Bay Unit
Appendix A.14 Measured Value List - Bay Unit FNo. Description Function IEC 60870-5-103 Configurable in Matrix 5701 IL1 = Current in phase L1 = 5702 IL2 = Current in phase L2 = 5703 IL3 = Current in phase L3 = 5704 IE = Earth Current = 5705...
Page 411: A.15 Marshalling - Central Unit
Marshalling - Central Unit A.15 Marshalling - Central Unit When the device leaves the factory, the annunciations for the binary inputs, relays, LEDs and function keys are preallocated for the maximum scope. For the prealloca- tion, please refer to Table A-22, page 395. Table A-22 Marshalling of the Binary Inputs Binary...
Page 412 Appendix Relay Annunciation FNo. Comments CB fault M 10456 Circuit breaker fault Bay DC fail M 10426 Failure of isolator aux. voltage Isol flt run M 10427 Isolator fault: run time Isol flt pos M 10428 Isolator position faulty Isol flt alarm 10425 Isolator fault alarm TRIP blocked...
Page 413 Marshalling - Central Unit Annunciation Comments CB fault M 10456 Circuit breaker fault Bay DC fail M 10426 Failure of isolator aux. voltage Isol flt run M 10427 Isolator fault: run time Isol flt pos M 10428 Isolator position faulty Isol flt alarm 10425 Isolator fault alarm...
Page 414: A.16 Marshalling - Bay Unit 7Ss523
Appendix A.16 Marshalling - Bay Unit 7SS523 When the device is delivered, annunciations are marshalled to the binary inputs, re- lays, and LEDs for the maximum scope. The functional keys are pre-assigned. The marshalling can be found in Table A-26, page 398 to Table A-30, page 400. Table A-26 Marshalling of the binary inputs of the bay unit 7SS523 Address...
Page 415 Table A-28 Marshalling Signal Relays of the bay unit 7SS523 Address 1st display line 2nd display line FNo. Comment 6201 SIGNAL RELAY 1 Bay o.of serv 7640 Bay is out of service Table A-29 Marshalling TRIP RELAYS of the bay unit 7SS523 Address 1st display line 2nd display line...
Page 416 Appendix Table A-30 Marshalling LED indicators of the bay unit 7SS523 Address 1st display line 2nd display line FNo. Comment 6301 LED 1 >Isolator1on 7601 >Isolator 1 - position closed 6302 LED 2 >Isolator1off 7602 >Isolator 1 - position open 6303 LED 3 >Isolator2on...
Page 417: A.17 Marshalling - Bay Unit 7Ss525
Marshalling - Bay Unit 7SS525 A.17 Marshalling - Bay Unit 7SS525 When the device is delivered, annunciations are marshalled to the binary inputs, re- lays, and LEDs for the maximum scope. The functional keys are pre-assigned. The marshalling can be found in Table A-31, page 401 to Table A-33, page 402. Table A-31 Marshalling of the binary inputs of the bay unit 7SS525 Address...
Page 418 Appendix Table A-33 Marshalling TRIP RELAYS of the bay unit 7SS525 Address 1st display line 2nd display line FNo. Comment 6401 TRIP RELAY 1 BB Trip L123 7631 Busbar protection: Trip in phase L123 CBF Trip L123 7643 CBF protection: Trip L123 CBF Trp.rp.3p 7632 CBF protection: Trip repeat phase L123...
Page 419: A.18 Navigation Tree - Central Unit
A.18 Navigation Tree - Central Unit The following navigation tree gives an overview of the parameter blocks and the individual parameters that can be se- lected in the central unit of the SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection. It shows the op- erations which are necessary to achieve certain setting options.
Page 420 Table A-35 Navigation tree of the central unit 1st level 2nd level 3rd level 4th level 5th level Main Menu Annunciations SET/RESET xx/yy >Event Log -> x Trip Log -> x Measurement xx/yy Operation.PRI BU I PRI xx/nn BUxx xx/nn >Operation.pri ->...
Page 421 Table A-35 Navigation tree of the central unit 1st level 2nd level 3rd level 4th level 5th level Control xx/yy Taggings xx/yy Display xx/yy >Taggings -> x >Display -> x >TRIP blocking Interlock -> x -> x Blocking Main Menu Control Taggings SET xx/yy...
Page 422 Table A-35 Navigation tree of the central unit 1st level 2nd level 3rd level 4th level 5th level Binary Outputs xx/yy >Binary Output1 -> - Binary Output16-> - Main Menu Parameter Subst. Data 5104 Frequency ## Hz Param. Group xx/yy General xx/yy >General...
Page 423 Table A-35 Navigation tree of the central unit 1st level 2nd level 3rd level 4th level 5th level Main Menu Parameter Param.Group BB PROT. xx/yy 6103 STAB FAC CZ >#.## BB PROT. xx/yy 6104 Id> CZ >#.##I/Ino BF PROT. 6201 STAB FAC BF >#.## xx/yy BUxx...
Page 424 Table A-35 Navigation tree of the central unit 1st level 2nd level 3rd level 4th level 5th level Main Menu Parameter Param. Group Supervision xx/yy 6306 DIFF.SUPERV >ON Supervision xx/yy 6308 Id> SUPERV BZ >#.##I/Ino Supervision xx/yy 6309 Id> SUPERV CZ >#.##I/Ino Supervision xx/yy...
Page 425 Table A-35 Navigation tree of the central unit 1st level 2nd level 3rd level 4th level 5th level Main Menu Parameter Param. Group Supervision xx/yy 6304 ISOL ST 1/1 >old isolator status Supervision xx/yy 6302 ISOL Malfunct alarm only Supervision xx/yy 6316 I>...
Page 426 Table A-35 Navigation tree of the central unit 1st level 2nd level 3rd level 4th level 5th level xx/yy BUxx >BU01 -> xx xx12 Bay status >out of service BUnn -> xx Main Menu Parameter SETUP/EXTRAS xx/yy Date/Time >Date/Time -> x Status: -- NS ER ST Clock Setup...
Page 427 LB-No.: ######### Firmware: V##.##.## Bootsystem:V##.##.## P-Set: V##.##.## CONTRAST TEST/DIAGNOSIS xx/yy >Device reset Test Enable -> x Blk Data Trans-> x Hardware Test -> x Device reset ... Osc.Fault Rec.-> x Set/Reset -> x SIEMENS Intern TEST Enable TEST Enable >OFF...
Page 428 Table A-35 Navigation tree of the central unit 1st level 2nd level 3rd level 4th level 5th level BLK DATA TRANS Blk Data Trans >OFF Main Menu Test/Diagnosis Hardware Test HWTestMod >OFF Osc.Fault Rec. FltRecSta >ON Set/Reset xx/yy >Event Log TRIP log Reset Id-Block Reset IsoMalBl...
Page 429: A.19 Navigation Tree Of The Bay Unit
Navigation Tree of the Bay Unit A.19 Navigation Tree of the Bay Unit The following navigation tree gives an overview of the parameter blocks and the indi- vidual parameters that can be set in the bay units of the SIPROTEC 7SS52 V4 distrib- uted busbar and failure protection.
Page 430: A.20 Abbreviations
Appendix A.20 Abbreviations Auxiliary bus (bus coupler) sections (sections which serve exclusively for longi- tudinal connection of bus zones and to which no outgoing feeders are connect- Busbar protection Breaker Failure Binary input Binary output BSZ1 Processing board for protection in the check zone BSZ2/3 Processing boards for protection in the selective zones Bay unit...
Page 431: A.21 References
References A.21 References SIPROTEC 4, System Description E50417-H1176-C151-A8 SIPROTEC DIGSI 4, Start-Up E50417-G1176-C152-A4 DIGSI CFC, Manual E50417-H1176-C098-A9 SIPROTEC SIGRA 4, Manual E50417-H1176-C070-A4 Ethernet & IEC 61850 Start UP E50417-F1100-C324-A1 SIPROTEC Distributed Busbar/Breaker Failure Protection IEC 61850 PIXIT C53000-G1176-C180-2 7SS52 V4 Manual C53000-G1176-C182-3...
Page 432 Appendix 7SS52 V4 Manual C53000-G1176-C182-3...
Page 433 Index 2-bay coupler 104 without circuit breaker 104 Abbreviations 414 Busbar coupling via isolators 146 Additional support iv Busbar protection 92 Algorithm 100 Evaluation of half-cycles 96 Annunciation buffer deleting 232 Applications 4 Central unit Assigning Bay Units 71 Communication module (D-CPU) 16 Auxiliary voltage supply failure 147 Fiber-optic module (LMZ) 17 I/O module (EAZ) 16...
Page 434 Index Not ready 127 Defining Bays 54 CLOSE command Deleting Detection 138 event buffer 233 Commissioning 262 Dimensions Commissioning tool 264 Bay unit 331 Concluding the configuration Central unit 329 concluding 89 Double leaf-spring-crimp contacts 26 Configuration Notes 63 Drawing Busbars 52 1-bay bus coupler 67 D-SUB female connectors 27 CT location 68...
Page 435 Index inserting 62 Trip output 143 Installing the bay unit Zero current 146 Cubicle mounting 257 Panel flush mounting 257 Navigation tree Panel surface mounting 257 BU 413 Installing the central unit CU 403 Panel flush mounting 256 Instructions and warnings iv Insulation tests 323 Operating mode IRIG B 85...
Page 436 Index fault rec mode 161 T-BF IMP 130 FREQUENCY 166 T-BF rel sup 131 I< MAN TRIP 173 T-BF-1P 130 I> 191 T-BF-3P 130 I> BF 115 T-BINARY IN 183 I> BF.EF 115 T-CB open 139 I> TRIP 173 Test mode SK 172 I>>...
Page 437 Index ports 81 Time format 88 Serial ports Time Synchronization 85 PC port 81 Training courses iv Service port 81 Transfer Busbar Operation with Several Setting 80 Feeders 107 Setting the date 239 Transfer busbars 105 Setting the time 239 Transmission block 277 Setting values Transmittig setting values...
Page 438 Index 7SS52 V4 Manual C53000-G1176-C182-34...
Page 439 Corrections From Siemens AG Name: Dept. PTD EA D TC25 D-90459 Nürnberg Company/Dept: Germany Address: Dear reader, printing errors can never be entirely eliminated: there- Phone no: Fax no: fore, should you come across any when reading this manual, kindly enter them in this form together with any comments or suggestions for improvement that you may have.
Page 440 Offenders are liable to the payment of damages. All rights are reserved in the event Subject to technical alteration of the grant of a patent or the registration of a utility model Siemens Aktiengesellschaft Order-no. : C53000-G1176-C182-3 Available from: LZF Fürth-Bislohe...

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