PCS 915SC x application manual EN overseas general x r1 10

3 Basic Function Configuration 3 differential current, and it will be counted into the discriminating zone differential current according to the disconnector position and the circuit br

qi

Copyright © 2020 NR All rights reserved

NR, the NR logo are either registered trademarks or trademarks of NR Electric Co., Ltd No NR trademarks may be used without written permission NR products appearing in this document may

be covered by P.R China and foreign patents NR Electric Co., Ltd reserves all rights and benefits afforded under P.R China and international copyright and patent laws in its products, including but not limited to software, firmware and documentation NR Engineering Co., Ltd is licensed to use this document as well as all intellectual property rights owned or held by NR Electric Co., Ltd, including but not limited to copyright, rights in inventions, patents, know-how, trade secrets, trademarks and trade names, service marks, design rights, database rights and rights in data, utility models, domain names and all similar rights

The information in this document is provided for informational use only and does not constitute a legal contract between NR and any person or entity unless otherwise specified Information in this document is subject to change without prior notice

To the extent required the products described herein meet applicable IEC and IEEE standards, but no such assurance is given with respect to local codes and ordinances because they vary greatly

Although every reasonable effort is made to present current and accurate information, this document does not purport to cover all details or variations in equipment nor provide for every possible contingency to be met in connection with installation, operation, or maintenance Should further information be desired or should particular problems arise which are not covered sufficiently for your purposes, please do not hesitate to contact us

Preface

About This Manual

This manual describes the configuration scheme in multiple application scenarios for PCS-915SC Centralized Busbar Relay, including how to connect the device to a computer and to configure functions, such as protection, measurement and supervision in using of configuration tool

To start using this manual for application configuration, user should know the basic operations of the configuration tool PCS-Studio

Safety Information

This manual is not a complete index of all safety measures required for operation of the equipment (module or device) However, it comprises important information that must be followed for personal safety, as well as to avoid material damage Information is highlighted and illustrated

as follows according to the degree of danger:

Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury

Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury

Indicates a potentially hazardous situation that, if not avoided, may result

in minor or moderate injury or equipment damage

Indicates that property damage can result if the measures specified are

not taken

Important information about the device, product handling or a certain section of the documentation which must be given particular attention

Instructions and Warnings

The following hazard statements apply to this device

Disconnect or de-energize all external connections BEFORE opening this

device Contact with hazardous voltages and currents inside this device can cause electrical shock resulting in injury or death

Contact with instrument terminals can cause electrical shock that can result in injury or death

Use of this equipment in a manner other than specified in this manual can impair operator safety safeguards provided by this equipment

Have only qualified personnel service this equipment If you are not qualified to service this equipment, you can injure yourself or others, or cause equipment damage

This device is shipped with default passwords Default passwords should

be changed to private passwords at installation Failure to change each default password to a private password may allow unauthorized access

NR shall not be responsible for any damage resulting from unauthorized access

DO NOT look into the fiber (laser) ports/connectors

DO NOT look into the end of an optical cable connected to an optical

output

DO NOT perform any procedures or adjustments that this instruction

manual does not describe

During installation, maintenance, or testing of the optical ports, ONLY use the test equipment qualified for Class 1 laser products!

Incorporated components, such as LEDs, transceivers, and laser emitters,

are NOT user serviceable Return units to NR for repair or replacement

Equipment components are SENSITIVE to electrostatic discharge (ESD)

Undetectable permanent damage can result if you do not use proper ESD procedures Ground yourself, your work surface, and this equipment

BEFORE removing any cover from this equipment If your facility is not

equipped to work with these components, contact NR about returning this device and related NR equipment for service

Insufficiently rated insulation can deteriorate under abnormal operating conditions and cause equipment damage For external circuits, use wiring

of SUFFICIENTLY RATED insulation that will not break down under

abnormal operating conditions

SEVERE power and ground problems can occur on the communications

ports of this equipment as a result of using non-standard cables Please use the wiring method recommended in the manual for communication terminals

DO NOT connect power to the relay until you have completed these

procedures and receive instruction to apply power Equipment damage can result otherwise

Use of controls or adjustments, or performance of procedures other than

those specified herein, may RESULT IN hazardous radiation exposure

The firmware may be upgraded to add new features or enhance/modify

existing features, please MAKE SURE that the version of this manual is

compatible with the product in your hand

Document Conventions

⚫ The abbreviations and acronyms in this manual are explained in “Appendix A Glossary” The Glossary also contains definitions of important terms

⚫ Menu path is connected with the arrow "→" and bold

For example: the access path of protection settings is: MainMenu→Settings→Protection

Settings

⚫ Settings not in the table should be placed in brackets

For example: the system setting [Opt_SysFreq]

⚫ Cross-references are presented in italics

For example: refer to Figure 1.1-1, refer to Table 1.1-1, reference to Section 1.1

⚫ Binary input signals, binary output signals, analogs, LED lights, buttons, and other fixed meanings, should be written in double quotes and bold

For example: press the button "ENT"

To concentrate on the target sections of this manual as your job needs and responsibilities dictate

An overview of each manual section and section topics follows

1 Functions and Application

Introduces summarizes functions and typical applications of the device

2 Configuration Tool

Introduces the communication interface of the device and the corresponding software and hardware settings by which PCS-Studio connects with the device

3 Basic Function Configuration

Introduces how to configure the basic function of the device, such as, enabling/disabling functions, setting HMI (human machine interface), setting communication protocol and network structure, binary inputs, binary outputs, user-defined logic, authority management, etc

4 Protection Function Configuration

Introduces how to configure protection functions, including enabling/disabling functions, configuration methods and corresponding settings

5 Measurement Function Configuration

Introduces the configuration method of the sampling channel for different typical application scenarios

6 Supervision Function Configuration

Introduces the configuration method of supervision functions, such as, secondary circuit supervision, tripping statistic, etc

Appendix A Glossary

Describes the abbreviations adopted in this manual

Document Revision History

PN: ZL_PCS-915SC_X_Application Manual_EN_Overseas General_X

1.2.1 Single Busbar Application 1-5

1.2.2 Double Busbars Application 1-6

List of Figures

Figure 1.1-1 Functional diagram of PCS-915SC 1-1

1 Functions and Application

1

1

1.1 Functions

The PCS-915SC centralized busbar relay integrates busbar differential protection, bus

coupler/section protection (includes overcurrent protection, switch-onto-fault protection, dead

zone fault protection, dual CTs BC/BS dead zone differential protection and breaker failure

protection), feeder protection (includes overcurrent protection, dead zone fault protection and

breaker failure protection), voltage protection (phase overvoltage protection and undervoltage

protection) and frequency protection (overfrequency protection, underfrequency protection and

frequency rate-of-change protection) With its flexibility and the powerful PCS-Studio configuration

tool, PCS-915SC offers future-oriented busbar solutions with high investment security and low

3 CTs

* 52

Figure 1.1-1 Functional diagram of PCS-915SC

The PCS-915SC is widely adopted not only for conventional substations, but also for digital

substations It supports IEC 61850 Editions 1 and 2 and provides GOOSE and SV network

interfaces with high real-time performance The process level network supports peer-to-peer (P2P)

mode and networking mode, including single network mode and dual network mode The station

level network can also receive and send MMS messages (such as interlocking signals) or process

level GOOSE messages (such as circuit breakers or disconnectors positions and trip signals)

1 Busbar differential protection

⚫ Steady-state percentage restraint busbar differential protection

⚫ DPFC percentage restraint busbar differential protection

87B

1 Functions and Application

1

2 Bus coupler/section protection

⚫ Breaker failure protection (50BF)

⚫ Dead zone fault protection (50DZ)

⚫ Dead zone differential protection (87DZ)

⚫ Switch-onto-fault protection (50SOTF)

⚫ Overcurrent protection (50/51)

50BF 50DZ 87DZ 50SOTF 50/51

3 Feeder protection

⚫ Breaker failure protection (50BF)

⚫ Dead zone fault protection (50DZ)

⚫ Overcurrent protection (50/51)

50BF 50DZ 50/51

4 Voltage protection

⚫ Phase overvoltage protection

⚫ Phase undervoltage protection

59P 27P

6 Auxiliary function

⚫ Dynamic busbar replica

⚫ CT circuit supervision

⚫ VT circuit supervision

⚫ Disconnector position alarm

DPFC is the abbreviation of “deviation of power frequency component” When a fault occurs in the power system, the fault current consists of three parts: the pre-fault power frequency components, the power frequency variables during the fault and the transient variables during the fault DPFC

is the power frequency variables during the fault

⚫ Phase angle measurement

⚫ Differential current calculation

⚫ Sequence component calculation

⚫ Event Recorder including 1024 disturbance records, 1024 binary events, 1024 supervision

1

events, 256 control logs and 1024 device logs

⚫ Disturbance recorder including 32 disturbance records with waveforms (The file format of

disturbance recorder is compatible with international COMTRADE file.)

⚫ Two RS-485 serial ports using IEC 60870-5-103 or Modbus

⚫ One RS-485 serial port for clock synchronization

⚫ Support GOOSE communication module using IEC 61850-8-1 GOOSE

⚫ Full compatibility between IEC 61850 Editions 1 and 2

⚫ Redundancy protocols PRP and HSR

⚫ One RS-485 serial port for clock synchronization

⚫ Support IEC 61850 MMS Server via extendable electrical or optical Ethernet port

⚫ Support IEC 61850-8-1 GOOSE via extendable electrical or optical Ethernet port

⚫ Support IEC 61850-9-2LE SV via extendable electrical or optical Ethernet port

1 Functions and Application

1

⚫ Up to 18 programmable target LEDs with user-configurable labels

⚫ 1 RS-232 or RS-485 rear ports for printer

⚫ Language switchover—English + selected language

⚫ Configuration tool—PCS-Studio

⚫ User programmable logic

⚫ Fault phase selection

⚫ System phase sequences rotation function (ABC or ACB)

⚫ Clock synchronization

 IRIG-B: IRIG-B via RS-485 differential level, TTL level or optical fiber interface

 PPS: Pulse per second (PPS) via RS-485 differential level or binary input

 PPM: Pulse per minute (PPM) via RS-485 differential level or binary input

 IEEE1588: Clock message based on IEEE1588 via optical fiber interface

 SNTP (PTP): Unicast (point-to-point) SNTP mode via Ethernet network

 SNTP (BC): Broadcast SNTP mode via Ethernet network

 Message (IEC103/Modbus/DNP3.0): Clock messages through IEC103 protocol, Modbus protocol and DNP3.0 protocol

1

the voltage of 4 busbars (12 AC voltage inputs), or 10 bays (30 AC current inputs) and the voltage

of 2 busbars (6 AC voltage inputs) Each extended unit can connect up to 12 bays (36 AC current

inputs) Please refer to following table for details

PCS-915SC

Analog input

Binary input

Binary output Busbar voltage is not

connected Busbar voltage is connected

CU 36 AC current inputs

18 AC current inputs +18 AC voltage inputs or

24 AC current inputs +12 AC voltage inputs or

30 AC current inputs +6 AC voltage inputs

233 124

1CU+1EU 72 AC current inputs

54 AC current inputs +18 AC voltage inputs or

60 AC current inputs +12 AC voltage inputs or

66 AC current inputs +6 AC voltage inputs

466 248

1CU+2EU 108 AC current inputs

90 AC current inputs +18 AC voltage inputs or

96 AC current inputs +12 AC voltage inputs or

102 AC current inputs +6 AC voltage inputs

3 CTs

* 52

For single busbar application, the device can connect up to 36 bays, it provides busbar differential

protection, feeder protection functions (includes overcurrent protection, dead zone fault protection

and breaker failure protection), voltage protection (phase overvoltage protection and undervoltage

protection) and frequency protection (overfrequency protection, underfrequency protection and

frequency rate-of-change protection) etc

1 Functions and Application

3 CTs

* 52

2 Configuration Tool

2

2 Configuration Tool

Table of Contents

2.1 Brief Introduction to PCS-Studio 2-1

2.2 Connection to Debugging Computer 2-1

2.2.1 Via Front RJ45 Port 2-1

2.2.2 Via Ethernet Interface on CPU Module 2-2

2.3 Validation of Configuration 2-2

2 Configuration Tool

2

2 Configuration Tool

2

2.1 Brief Introduction to PCS-Studio

PCS-Studio is a configuration and debugging tool designed for PCS S series devices It provides

the following configuration and debugging functions:

⚫ Device information configuration

Viewing and editing project name, user configuration file version, file modification time, etc

⚫ Global function configuration

MOT selection, system configuration, function object activation/deactivation, etc

⚫ Human-machine interface configuration

Single Line Diagram (SLD) drawing for LCD display, definition of LED indicators, shortcut

keys, user-level waveform recording, etc

⚫ Communication configuration

Support of multiple communication protocols, including IEC 61850 (Edition 1 & Edition 2), IEC

60870-5-103, DNP3.0, Modbus, etc

⚫ IO signal configuration

Binary inputs, binary outputs, AC and DC analogue inputs, etc

⚫ User-defined logic programming

Complete and rich symbol library for user-defined logic programming

⚫ Parameter setting

Setting, import and export of device parameters

⚫ Online debugging

Debugging through visual pages and virtual LCD screen

2.2 Connection to Debugging Computer

On the front panel of the device, there is a multiplex RJ45 port which is the debugging port for

connection to a portable computer Meanwhile, the CPU plug-in module is equipped with several

Ethernet interfaces which may also be used to communicate with debugging computer

2.2.1 Via Front RJ45 Port

By default, the IP address of front debugging port is “100.100.100.100” with the subnet mask

“255.255.255.000” If this address conflicts with any other Ethernet port on CPU module Through

the device front human-machine interface, please call up the modification menu by pressing the

key combination "◄ ＋ ◄ － ENT" under the default LCD display screen and change the

2 Configuration Tool

2

default address

2.2.2 Via Ethernet Interface on CPU Module

Firstly, a connection between the device and the computer must be established by setting the IP address and subnet mask of the corresponding interfaces Configure the IP address and the

subnet mask of corresponding Ethernet interface through MainMenu → Settings → Global

Settings → Comm Settings → General Comm Settings

The IP addresses and the subnet masks of device PC should be in the same network segment Take the second Ethernet interface (LAN2) on CPU module as an example:

Device Debugging PC

IP address [IP_LAN2] = 198.87.96.XXX 198.87.96.102

Subnet mask [Mask_LAN2] = 255.255.255.0 255.255.255.0

LAN enabling setting [En_LAN2] = Enabled

“XXX” can be any value from 0 to 255 except 102

2.3 Validation of Configuration

To take effect of all kinds of offline configuration work through PCS-Studio, it is necessary to regenerate the device configuration file (*.devs) and download it to the device A reboot of device

is obligatory after the download for the validation of any modification

All function configuration described in the following chapters are offline tasks, which requires the “file generation, file downloading and device reboot” process for validation

3 Basic Function Configuration

3.2.4 Disturbance Fault Recording 3-26

3.3 Human Machine Interface Configuration 3-29

3.3.1 Single Line Diagram Display 3-29

3.5.2 Input Signal from BI Module 3-43

3.5.3 Binary Input Signals 3-44

3.5.4 Modify Signal Description 3-48

3.5.5 Modify Signal Parameter 3-48

3.6 Binary Outputs 3-49

3.6.1 Selection of BO Module 3-49

3.6.2 Output Signal to BO Module 3-50

3 Basic Function Configuration

3

3.6.3 Binary Output Signals 3-52 3.6.4 Modify Signal Description 3-60

3.7 User-programmable Logic 3-62 3.8 User Authority Management 3-64

3.8.1 Role Group Configuration 3-66 3.8.2 User Configuration (Remote/Local) 3-67

3.9 Setting Group Switching 3-68

3.9.1 Number of Groups 3-68 3.9.2 Active Group Switching 3-69 3.9.3 Group Number Output 3-70

3.10 GOOSE Communication 3-71

3.10.1 GOOSE Receiving 3-72 3.10.2 GOOSE Sending 3-77 3.10.3 Logic Symbols 3-83

3.11 SV Communication Configuration 3-85 List of Figures

Figure 3.4-1 EIA RS-485 bus connection arrangements 3-40

3 Basic Function Configuration

3

3.1 Device Information

Select the page "Device Information" through the path Project Node → Device Node→ Device

Setup → Device Information to view the basic information of the device The information is

derived from the driver file when adding the device into a project

Some information may be modified to facilitate the device management, including instance name,

config file version, config time, etc The length of user-defined information (User Information) is

limited to 106 bytes

When generating the driver file, the configuration tool will package user-defined information and

MOT information After downloading the driver file to the device, the information will be analyzed

and displayed on the device′s LCD

3.2 Global Configuration

3.2.1 MOT Selection

Usually, the device Market Ordering Table (MOT) is defined during the project ordering phase

Please check and adapt to the MOT code to verify the device functions configuration in specific

project dessin The MOT selection path is: Device Node → Device Setup → Global Config →

MOT

The MOT code and the detailed option information are displayed on the page Please double click

a cell in the “Option” column to switch the option from drop-down box for device functional and

hardware specifications modification When the contents of the cell are changed, the

corresponding contents in the "Description" and "Code" columns and the corresponding bit of

3 Basic Function Configuration

3

ordering code will change synchronously

The MOT of the central unit PCS-915SC-CU and the extended unit PCS-915SC-EU are shown as belows

Between some options, coercive and mutually exclusive relations may exist For a coercive relation, one option is fixed to be selected; for a mutually exclusive relation, one option is impossible to be selected

3 Basic Function Configuration

3

Click on the “Software Functions” button to view the device function scheme for different

application scenarios

Click on the “Show Back View” button to view the device rear panel modelled and composed of

user configured plug-in modules

3.2.2 Single Line Diagram Config

For PCS-915SC, drawing the busbar arrangement on the page “Single Line Diagram” via the

auxiliary configuration tool PCS-Studio, and completing the type definition of each bay of the

busbar arrangement, then the device can be adapted to different busbar arrangement The

currently supported bay type including single-CT bus coupler (Tie), double-CTs bus coupler

(Tie2CT), feeder (Feeder), disconnector (SwitchTie), bus section of double busbars with two bus

sections busbar arrangement when two PCS-915SC are equipped (TieSection) and bus coupler

without CT (TieNoCT) The currently supported busbar arrangement including single-busbar

arrangement, single-busbar with bus section arrangement, double-busbars arrangement,

double-busbars with one bus section arrangement, double-busbars with two bus sections

arrangement, single-busbar with transfer bus arrangement, single-busbar with bus section and

transfer bus arrangement, double-busbars with transfer bus arrangement etc

3.2.2.1 Single Line Diagram Template

Enter the configuration page through the path in PCS-Studio: Project Node → Device Node →

Global Config → Single Line Diagram, delete the original exsisted single line diagram and

select the busbar arrangement template that consistent with the busbar arrangement on-site via

the tab “SLD Templates”

3 Basic Function Configuration

3

Double-click the busbar symbol to pop up the busbar properties dialog box, where “Name” can be modified according to the actual name of the busbar, and “Instance” is an instantiated busbar

component and cannot be modified If the “Instance” is Busx, then the disconnector connected to

this busbar is BBx disconnector (the corresponding normally open/closed auxiliary contact is

@Bayn.BI_89a_@BBx/@Bayn.BI_89b_@BBx) If the busbar voltage needs to be connected, the corresponding voltage element is BBx voltage element The VT element in the single line diagram

does not need to be configured, and the PCS-Studio will instantiate the VT element according to the number of busbar When the “show” option in the following figure is checked, the name of the symbol will be displayed on the single line diagram, otherwise it will not be displayed

When there are dual CTs BC/BS in the single line diagram, and the two CTs are not cross-connected to the discriminating zone differential circuit, if

BC/BS dead zone differential protection is needed, users MUST double-click the module “Tie2CT” in the single line diagram and select the

“Cross property” as "Non Across" in the pop-up page “Property”

Otherwise, BC/BS dead zone differential protection can not be used

3 Basic Function Configuration

3

3.2.2.2 Bay Templates

If the number of bays in the busbar arrangement template is less than the actual number of bays,

user need to select the corresponding bay template from the tab “Bay Templates” and drag it to

the configuration interface, and then use the “Switch” symbol from the tab “Base” to connect the

newly dragged bay to the busbar arrangement

3.2.2.3 Instantiation

Double click the bay template, associate the bay with corresponding component to complete the

instantiation of the component

3 Basic Function Configuration

3

After the busbar arrangement configuration is completed, the busbar

arrangement configuration should be SAVED first, and then confirm

whether each bay current can be counted into the check zone differential current and the discriminating zone differential current of each busbar via the differential protection constitution table

This table only indicates that each bay current can be counted into the check zone differential current and the discriminating zone differential current of corresponding busbar, during the actual operation of the device, the actual differential current calculation result of each bay should be confirmed by combining the circuit breaker position status and disconnector position status of each bay

After the configuration is completed and downloaded to the device, the current should be injected for each bay, and the disconnector position also should be applied to check whether the bay current can be counted into the check zone differential current and the discriminating zone differential current of corresponding busbar correctly

3 Basic Function Configuration

3

When the “Application” item of MOT is selected as “A: 1~12 bays (36CT, or 30CT + 6VT, or

24CT + 12VT” or 18CT + 18VT)”, only the bays Tie2CT1~Tie2CT4, Tie1~Tie4,

TieSection1~TieSection4, Bay1~Bay12 can be associated and instantiated, the other bays cannot

be instantiated even if they are associated And the total number of analog input channels cannot

exceed 36

When the “Application” item of MOT is selected as “B: 13~24 bays (72CT, or 66CT + 6VT, or

60CT + 12VT” or 54CT + 18VT)”, only the bays Tie2CT1~Tie2CT6, Tie1~Tie6,

TieSection1~TieSection6, Bay1~Bay24 can be associated and instantiated, the other bays cannot

be instantiated even if they are associated And the total number of analog input channels cannot

exceed 72

When the “Application” item of MOT is selected as “C: 25~36 bays (108CT, or 102CT + 6VT, or

96CT + 12VT” or 90CT + 18VT)”, the bays Tie2CT1~Tie2CT6, Tie1~Tie6,

TieSection1~TieSection6, Bay1~Bay36 can be associated and instantiated And the total number

of analog input channels cannot exceed 108

3.2.2.4 Bay Type Description

Enter the configuration page through the path in PCS-Studio: Project Node → Device Node →

Global Config → Single Line Diagram, and select the tab “Bay Templates”, all the bay

templates are listed

3 Basic Function Configuration

3

Following table lists the currently supported bay types of the device The switch, TA, etc in each bay symbol are not allowed to be deleted The disconnector can be added according to the actual needs on site It should be noted that the increased disconnector symbol must be guaranteed within the box of the bay symbol If the disconnector symbol is outside the box of the bay symbol, the device does not consider that the added disconnector belongs to the bay At present, the device only supports adding disconnector symbol in the bay symbol, and does not support adding other symbols such as switch and TA

3 Basic Function Configuration

to the feeder disconnector position and the circuit breaker position (feeder dead zone fault protection is enabled)

SwitchTie

It is used as the tie disconnector for the busbar, when it is closed, the connected busbars of the tie disconnector will be considered as under the inter-linked operation mode automatically

Tie

Single-CT bus coupler, it is used as the tie breaker for the busbar, the busbar can be connected to both the breaker side and the TA side

When only one busbar is connected to a certain side, the BC current will be counted into the discriminating zone differential current of the connected busbar

When the number of the connected busbars on one side is greater than or equal to 2, the BC current will be counted into the discriminating zone differential current of the busbar of which the disconnector is closed In addition, whether the

BS current is counted into the discriminating zone differential current also needs to consider the dead zone fault protection function

Tie2CT

Double-CTs bus coupler, it is used as the tie breaker for the busbar, the busbar can be connected to both the TA1 side and the TA2 side

Double-click the symbol, the cross attribute (Across, Non Across) can be selected

Across: TA1 and TA2 are cross-counted into the discriminating zone differential current of the connected busbars

Non Across: TA1 and TA2 are not cross-counted

3 Basic Function Configuration

3

into the discriminating zone differential current of the connected busbars, if BC dead zone fault happens, the busbar differential protection will not operate BC dead zone fault differential protection function will operate if it is enabled (Please refer to

Section 4.3.2 about the details of the enabling of

BC dead zone fault differential protection)

When only one busbar is connected to a certain side, the BC current will be counted into the discriminating zone differential current of the connected busbar

When the number of the connected busbars on one side is greater than or equal to 2, the BC current will be counted into the discriminating zone differential current of the busbar of which the disconnector is closed In addition, whether the

BS current is counted into the discriminating zone differential current also needs to consider the dead zone fault protection function

TieNoCT

It is used as the tie breaker for the busbar, the busbar can be connected to both sides of the breaker through the disconnector

When it is closed, and the disconnector that connected to the busbar is also closed, the busbars connected through the disconnector on both sides of the breaker will be considered as under the inter-linked operation mode automatically

TieSection

(For the double

busbars with two

When only one busbar is connected to the TA1 side, the BS current will be counted into the check zone differential current and the discriminating zone differential current of the connected busbar When the number of the connected busbars on the TA1 side is greater than or equal to 2, the BS current will be counted into the check zone differential current, and it will also be counted into

3 Basic Function Configuration

to consider the BS dead zone fault protection function

Single-CT bus section, it is used as the tie breaker for the busbar, the bay CT is on the inside of the breaker, the busbar can be connected to the QA1 side

When only one busbar is connected to the QA1 side, the BS current will be counted into the check zone differential current and the discriminating zone differential current of the connected busbar

When the number of the connected busbars on the QA1 side is greater than or equal to 2, the BS current will be counted into the check zone differential current, and it will also be counted into the discriminating zone differential current of the busbar of which the disconnector is closed In addition, whether the BS current is counted into the check zone differential current and discriminating zone differential current also needs

to consider the BS dead zone fault protection function

3.2.2.5 Typical Busbar Arrangement Description

1 Single-busbar arrangement

The differential circuits include one check zone differential circuit and one discriminating zone

differential circuit (Bus1), The current of each feeder is fixedly counted into the check zone

3 Basic Function Configuration

3

differential current, and it will be counted into the discriminating zone differential current according

to the disconnector position and the circuit breaker position (if feeder dead zone fault protection is enabled) of each bay

2 Single-busbar with bus section arrangement

The differential circuits include one check zone differential circuit and two discriminating zone differential circuits (Bus1 and Bus2)

The current of each feeder is fixedly counted into the check zone differential current, and it will be counted into the discriminating zone differential current according to the disconnector position and the circuit breaker position (if feeder dead zone fault protection is enabled) of each bay

The BS current will be counted into the discriminating zone differential current of Bus1 and Bus2, and it is decided whether to be excluded from discriminating zone differential current calculation according to BS dead zone fault protection function and the disconnector position (if the item

“Method to consider BC/BS current in differential current” in the system config page is selected as

“DS_Pos”, the access path of PCS-Studio is: Device Node → Device Setup → Global Config

3 Double-busbars arrangement

The differential circuits include one check zone differential circuit and two discriminating zone differential circuits (Bus1 and Bus2)

3 Basic Function Configuration

3

The current of each feeder is fixedly counted into the check zone differential current, and it will be

counted into the discriminating zone differential current according to the disconnector position and

the circuit breaker position (if feeder dead zone fault protection is enabled) of each bay

The BC current will be counted into the discriminating zone differential current of Bus1 and Bus2,

and it is decided whether to be excluded from discriminating zone differential current calculation

according to BC dead zone fault protection function and the disconnector position (if the item

“Method to consider BC/BS current in differential current” in the system config page is selected as

“DS_Pos”, the access path of PCS-Studio is: Device Node → Device Setup → Global Config →

System Config)

4 Double-busbars with two bus sections arrangement (Two PCS-915SC are configured)

The differential circuits include one check zone differential circuit and two discriminating zone

differential circuits (Bus1 and Bus2)

The current of each feeder is fixedly counted into the check zone differential current, and it will be

counted into the discriminating zone differential current according to the disconnector position and

the circuit breaker position (if feeder dead zone fault protection is enabled) of each bay

The current of the BC (Tie1) is counted into the discriminating zone differential current of Bus1

and Bus2, and it is decided whether to be excluded from discriminating zone differential current

calculation according to BC dead zone fault protection function and the disconnector position (if

the item “Method to consider BC/BS current in differential current” in the system config page is

selected as “DS_Pos”, the access path of PCS-Studio is: Device Node → Device Setup →

Global Config → System Config)

The current of the BS1 (TieSection1) is counted into the check zone differential current and the

discriminating zone differential current of Bus1, and it is decided whether to be excluded from

discriminating zone differential current calculation according to BS dead zone fault protection

3 Basic Function Configuration

3

function and the disconnector position (if the item “Method to consider BC/BS current in differential current” in the system config page is selected as “DS_Pos”, the access path of

PCS-Studio is: Device Node → Device Setup → Global Config → System Config)

The current of the BS2 (TieSection2) is counted into the check zone differential current and the discriminating zone differential current of Bus2, and it is decided whether to be excluded from discriminating zone differential current calculation according to BS dead zone fault protection function and the disconnector position (if the item “Method to consider BC/BS current in differential current” in the system config page is selected as “DS_Pos”, the access path of

PCS-Studio is: Device Node → Device Setup → Global Config → System Config)

5 Double-busbars with two bus sections arrangement (Only one PCS-915SC is configured)

The differential circuits include one check zone differential circuit and four discriminating zone differential circuits (Bus1, Bus2, Bus3 and Bus4)

The current of each feeder is fixedly counted into the check zone differential current, and it will be counted into the discriminating zone differential current according to the disconnector position and the circuit breaker position (if feeder dead zone fault protection is enabled) of each bay

The current of the BC (Tie1) is counted into the discriminating zone differential current of Bus1 and Bus2, and it is decided whether to be excluded from discriminating zone differential current calculation according to BC dead zone fault protection function and the disconnector position (if the item “Method to consider BC/BS current in differential current” in the system config page is

selected as “DS_Pos”, the access path of PCS-Studio is: Device Node → Device Setup →

Global Config → System Config)

The current of the BC (Tie2) is counted into the discriminating zone differential current of Bus3 and Bus4, and it is decided whether to be excluded from discriminating zone differential current calculation according to BC dead zone fault protection function and the disconnector position (if the item “Method to consider BC/BS current in differential current” in the system config page is

selected as “DS_Pos”, the access path of PCS-Studio is: Device Node → Device Setup →

Global Config → System Config)

The current of the BC (Tie3) is counted into the discriminating zone differential current of Bus1 and Bus3, and it is decided whether to be excluded from discriminating zone differential current calculation according to BC dead zone fault protection function and the disconnector position (if