PCS 915SC x technical manual EN overseas general x r1 20

⚫ The current settings conversion description is added; ⚫ The setting range of the system setting [Active_Grp] is modified; ⚫ The binary input [87B.BI_ExtBlk] and the alarm signal [87B.

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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

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Preface

About This Manual

The technical manual describes the protection, automation, and supervision functions of PCS-915SC centralized busbar differential relay, and contains operation principle descriptions, and lists function blocks, logic diagrams, input and output signals, setting parameters and technical data, sorted per function, as well as the hardware of the device The manual can be used as a technical reference during the engineering phase and during normal service In addition, the manual also includes a glossary that lists and defines technical terms used throughout the manual

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

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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

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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

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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"

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An overview of each manual section and section topics follows

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The content of this manual has been compiled for information purposes only Although NR has done its best to ensure that the document remains the most precise and the most up-to-date as possible, NR shall not assume any liability for defects and damage which result through use of the information contained herein

Document Revision History

PN: ZL_PCS-915SC_X_Technical Manual_EN_Overseas General_X

Current version: R1.20

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⚫ The current settings conversion description is added;

⚫ The setting range of the system setting [Active_Grp] is modified;

⚫ The binary input [87B.BI_ExtBlk] and the alarm signal [87B.Alm_BI_ExtBlk] are deleted;

⚫ The logics of 87B, 50DZ, 50SOTF are modified

⚫ The binary input [@Bayn.BI_En_Force_52b] is added;

⚫ The Section “Busbar Protection Operation Mode

Identification” in Chapter 3 is modified;

⚫ BC/BS dead zone differential protection is added;

⚫ Phase overvoltage protection and phase undervoltage protection are added;

⚫ Overfrequency protection, underfrequency protection and frequency rate-of-change protection are added;

⚫ Breaker failure protection logic is modified;

⚫ VT circuit supervision function is modified

⚫ The busbar differential protection settings [87B.t_Dly1_Biased] and [87B.t_Dly2_Biased] are added;

⚫ The dead zone fault protection settings [BC.50DZ.En_Blk50BF] and [Fdr.50DZ.En_Blk50BF] are added;

⚫ The supervision setting [Opt_CBPosChk] is added;

⚫ The logic of breaker failure protection is modified

⚫ The front view, the typical rear view and the typical hardware configuration of the extended unit PCS-915SC-EU are added

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R1.20 R1.23 2020-07-02

⚫ Section 3.3 and Section 3.4 are added;

⚫ Many signals are added for each protection element;

⚫ The setting [50DZ.En_BlkDPFC] is added;

⚫ The logic diagram of BC/BS dead zone fault protection and feeder dead zone fault protection are modified;

⚫ The logic diagram of BC/BS dead zone differential protectionis modified;

⚫ The logic of breaker failure protection is modified;

⚫ The bay CT circuit failure function is added;

⚫ External binary input trip busbar function is modified;

⚫ Section 3.22.2 is modified;

⚫ Section 6.1 is modified;

⚫ Section 6.3.6 is added;

⚫ The device setting [En_PopupRecord_Blk] is added;

⚫ Label settings are modified

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1

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1

1.1 Application

PCS-915SC centralized busbar relay integrates busbar differential protection, bus coupler/section

protection (includes overcurrent protection, switch-on-to-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

operating costs

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)

3 CTs

* 52

The functions of this relay include protective functions and auxiliary testing functions, and the

functions of this relay are listed in the following tables

1 Busbar differential protection ⚫ Steady-state percentage restraint busbar 87B

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1

differential protection

⚫ DPFC percentage restraint busbar differential protection

2 Bus coupler/section protection

⚫ Breaker failure protection (50BF)

⚫ Dead zone fault protection (50DZ)

⚫ Dead zone differential protection (87DZ)

⚫ Switch-on-to-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

2 Measurement functions

⚫ Phase angle measurement

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1

⚫ Differential current calculation

⚫ Sequence component calculation

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

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

5 Digital interface

⚫ 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

6 User Interface

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1

⚫ Friendly HMI interface with LCD, easy-to-use keypad aids simple navigation and set-point adjustment

⚫ 4 programmable operator pushbuttons with user-configurable labels

⚫ 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

7 Additional functions

⚫ 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

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1

circuit ensure that overall reliability of the device is high Real-time sampling based on dual AD

can mutually check and detect the potential abnormality in the sampling circuit in time The

control power supply of the output relay is independent with the control circuit of trigger signals,

which can prevent from undesired operation caused by the abnormality of drive circuit of

output relays

⚫ Various function modules can satisfy various situations according to the different requirements

of users Flexible and universal logic programming, user-defined configuration of BI/BOs,

buttons and LEDs and powerful analogue programming are supported

⚫ Modularized hardware design makes the device be easily upgraded or repaired by a qualified

service person It can be combined with different I/O modules, with online self-check and

monitoring function, and the device can be restored from abnormal operation only need to

replace a single abnormal module

⚫ Support memory check and error correction function, ensure high reliability and safety

⚫ Support the internet communication protocol of native PRP/HSR and RSTP

⚫ Fully compatible with IEC 61850 edition 1 & edition 2, support MMS service, IEC 62351

communication service, GOOSE communication in station level & process level, SV

communication with multi-sampling rate

⚫ Fully comply with cyber security standards, including IEC62443, IEC62351, IEEE1686,

NERC-CIP, support role based access control (RBAC), security audit, security encryption

communication and security tool, improve the cyber security capability of devices

⚫ Powerful COMTRADE fault and disturbance recording function is supported The whole

recording time is automatically configurable by the fault duration, which is convenient to fault

analysis and replay The recording sample rate is up to 9.6kHz

⚫ Settable secondary rated current (1A/5A) and settable voltage threshold of binary input

⚫ Support flush mounting and rack mounting methods

⚫ Cross screw IO, CT/VT terminals can support AWG12 specification connector and 4mm2 lead

⚫ Protection class of front side is up to IP54

⚫ PCS-Studio configuration tool is the application software on the user’s PC for the interface

with PCS S series devices providing all the related functionality It ranges from device

configuration to entire substation design of bay integration

⚫ Support IEEE1588, IRIG-B clock synchronization

⚫ Support actual system phase sequence, either ABC or ACB, incorrect connection of actual

phase sequence can automatically be verified and relevant protection functions can be

blocked

⚫ Equipped with high-speed large capacity output relay, its operation speed is less than 1ms and

its break capacity is up to 10A The real-time supervision for output drive circuit can detect the

abnormality in advance

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6 busbars and 36 bays

⚫ Comprehensive functionality including phase segregated current differential protection, breaker failure protection, overcurrent protection and dead zone protection, etc

⚫ The phase segregated differential protection adopts both of deviation of power frequency component (DPFC) and steady-state component, that can guarantees fast and reliable performance during CT saturation It can ensure no mal-operation of external fault and fast operation of internal fault in the case of the correct transfer time of CT is no less than 3ms

⚫ With patented adaptive-weight anti-saturation algorithm and harmonic restrain algorithm, the DPFC differential protection operates fast and not affected by load current, the typical operation time is within 15ms

⚫ Voltage blocking is an option for the current differential protection and breaker failure protection, which will improve the reliability of current differential protection and breaker failure protection

⚫ With CT circuit supervision function, once CT circuit failure is detected, the user can choose discrimination zone or check zone differential protection blocking

⚫ Both of phase segregated and three phase breaker failure binary inputs can be connected for breaker failure protection, users can choose whether or not blocked by the current criterion The overcurrent element of breaker failure protection have been especially treated, the drop-off time of it is no more than 12ms

⚫ Selectable IEC, ANSI inverse-time characteristic curves that can be defined by users and the inverse-time drop-out curve selection is supported

⚫ With the disconnector position status monitor and memory function, the device can check the rationality of the memorized disconnector position status and automatically correct the error

⚫ Users can disable the discrimination zone differential element by the external binary input during the busbar maintenance Also the bay can be disabled by the external binary input when it is in maintenance

⚫ LCD can display real-time main wiring diagram, the number of each bay, the state of each breaker and disconnector, current and power flow, etc

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2

2.10.1 Clock Performance 2-10 2.10.2 Fault and Disturbance Recording 2-11 2.10.3 Binary Input Signal 2-11

2.11 Protective Functions 2-11

2.11.1 Current Differential Protection (87B/87DZ) 2-11 2.11.2 Dead Zone Fault Protection (50DZ) 2-11 2.11.3 Switch-on-to-fault Protection (50SOTF) 2-11 2.11.4 Breaker Failure Protection (50BF) 2-11 2.11.5 Phase Overcurrent Protection (50/51P) 2-11 2.11.6 Earth Fault Protection (50/51G) 2-12 2.11.7 Phase Overvoltage Protection (59P) 2-12 2.11.8 Phase Undervoltage Protection (27P) 2-12 2.11.9 Overfrequency Protection (81O) 2-13 2.11.10 Underfrequency Protection (81U) 2-13 2.11.11 Frequency Rate-of-change Protection (81R) 2-13

2.12 Communication Functions 2-14

2.12.1 GOOSE 2-14 2.12.2 SV 2-14

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Burden <0.05VA/phase @1A, <0.25VA/phase @5A

600V 660V

Phase-to-phase 519V

1038V 1141V

Burden at rated <0.10VA/phase @100V

2.1.3 Power Supply

Rated voltage 110Vdc/125Vdc/220Vdc/250Vdc

100Vac/110Vac/115Vac/120Vac 127Vac/220Vac/230Vac/240Vac 250Vac

Permissible voltage range

IEC 61000-4-11:2017 IEC 61000-4-29:2000

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Quiescent condition <30W (Default hardware configuration)

Additional for each energized SFP socket

Additional for each binary output (BO) module

Quiescent condition: <0.1W Additional for each energized relay: <0.44W Additional module for SV

On value (default set) 69.3~132Vdc 78.75~160Vdc 138.6~264Vdc 157.5~300Vdc

Off value (default set) <55Vdc <62.5Vdc <110Vdc <125Vdc

Maximum permissible voltage 300Vdc

Withstand voltage 2000Vac, 2800Vdc (1 min)

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2

Settable pickup voltage and dropout voltage

Maximum permissible voltage 300Vac

Settable pickup voltage and dropout voltage

Maximum permissible voltage 300Vdc

2.1.5 Binary Output

Tripping/signalling contact

Maximum system voltage 250Vac, 300Vdc

Pickup time (Typical value) <5ms

Drop-off time (Resistive load) <6ms

Breaking capacity (L/R=40ms)

0.5A@48Vdc 0.35A@110Vdc 0.30A@125Vdc 0.20A@220Vdc 0.15A@250Vdc Cyclic capacity (2.5 cycle/second,

L/R=40ms)

0.5A@48Vdc 0.35A@110Vdc

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2

0.30A@125Vdc 0.20A@220Vdc 0.15A@250Vdc

Short duration current

30A@3s 50A@1s Durability (Loaded contact) 10000 operations

Heavy-capacity tripping contact

MOV Protection (Maximum voltage) 350Vdc, 275Vac

Pickup time (Typical value) <1ms

Drop-off time (Resistive load) <10ms

Breaking capacity

10A@48V L/R=40ms 10A@110V L/R=40ms 10A@125V L/R=40ms 10A@220V L/R=20ms 10A@250V L/R=20ms

Cyclic capacity (4cycles in 1 second,

followed by 2 minutes idle for thermal

dissipation)

10A@48V L/R=40ms 10A@110V L/R=40ms 10A@125V L/R=40ms 10A@220V L/R=20ms 10A@250V L/R=20ms

Short duration current

30A@3s 50A@1s Durability (Loaded contact) 10000 operations

2.2 Mechanical Specifications

Weight per device Approx 23kg (6U, 1/1 × 19")

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2

Location of terminal Rear panel of the device

Device structure Plug-in modular type @ rear side, integrated front-plate

Protection Class

Rear side, connection terminals IP20

2.3 Ambient Temperature and Humidity Range

Baud rate 4.8kbit/s, 9.6kbit/s, 19.2kbit/s, 38.4kbit/s, 57.6kbit/s, 115.2kbit/s

Maximum transmission distance 500m

Safety level Isolation to ELV level

Twisted pair Screened twisted pair cable

2.4.2 Ethernet Port

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2

Maximum transmission

distance

500m (50/125μm) 300m (62.5/125μm)

Protocol IEC 60870-5-103:1997, DNP 3.0 or IEC 61850

Safety level Isolation to ELV level

2.4.3 Optical Fiber Port

For Station Level

Characteristic Glass optical fiber

Maximum transmission distance 2km

Minimum receiving power -31dBm

2.4.4 Print Port

Baud rate 4.8kbit/s, 9.6kbit/s, 19.2kbit/s, 38.4kbit/s, 57.6kbit/s, 115.2kbit/s

Safety level Isolation to ELV level

2.4.5 Clock Synchronization Port

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2

2.5 Type Tests

2.5.1 Environmental Tests

Damp heat test, cyclic IEC60068-2-30:2005

2.5.2 Mechanical Tests

Shock and bump IEC 60255-21-2:1988 Class Ⅰ

2.5.3 Electrical Tests

Dielectric tests Test voltage 2kV, 50Hz, 1min

Impulse voltage tests Test voltage 5kV

Electrostatic discharge test

IEC 61000-4-2-2008 class Ⅳ For contact discharge: 8kV For air discharge: 15kV

Radio frequency interference tests

IEC 60255-26:2013 class Ⅲ Frequency sweep

Radiated amplitude-modulated 10V/m (rms), f=80~1000MHz, 1400~2700MHz Spot frequency

Radiated amplitude-modulated 10V/m (rms), f=80MHz/160MHz/450MHz/900MHz

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2

Fast transient disturbance tests

IEC 60255-26:2013 Power supply, I/O, Earth: class Ⅳ, 4kV, 5kHz, 5/50ns Communication terminals: class Ⅳ, 2kV, 5kHz, 5/50ns

Surge immunity test

IEC 60255-26:2013 Power supply, AC input, I/O port: class Ⅳ, 1.2/50μs Common mode: 4kV

Differential mode: 2kV

Conducted RF electromagnetic

disturbance

IEC 60255-26:2013 Power supply, AC, I/O, Comm Terminal: Class Ⅲ, 10V(rms), 150 kHz~80MHz

Spot frequency 10V (rms), f=27MHz/68MHz Power frequency magnetic field

immunity

IEC 61000-4-8: 2009 class Ⅴ, 100A/m for 1min, 1000A/m for 3s

Pulse magnetic field immunity

IEC 61000-4-9:2016 class Ⅴ, 6.4/16μs, 1000A/m for 3s Damped oscillatory magnetic field

immunity

IEC 61000-4-10:2016 class Ⅴ, 100kHz & 1MHz–100A/m

Conducted emission

IEC 60255-26:2013 0.15MHz~0.50MHz: 79dB (μV) quasi peak, 66dB (μV) average 0.50MHz~30MHz: 73dB (μV) quasi peak, 60dB (μV) average

Radiated emission

IEC 60255-26:2013

Below 1GHz

30MHz~230MHz: 40dB (μV/m) quasi peak @10m, 50dB (μV/m) quasi peak @3m

230MHz~1000MHz: 47dB (μV/m) quasi peak @10m, 57dB (μV/m) quasi peak @3m

Above 1GHz

1GHz~3GHz: 56dB (μV/m) average, 76dB (μV/m) peak @3m

3GHz~6GHz: 60dB (μV/m) average, 80dB (μV/m)

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500ms for interruption without rebooting with energy storage board (Typical configuration)

⚫ EMC: 2014/30/EU, EN60255-26:2013

⚫ Products safety (LVD): 2014/35/EU, EN60255-27:2014

⚫ IEC 61850: Edition 2, Parts 6, 7-1, 7-2, 7-3,7-4 and 8-1

⚫ IEC 61850: Edition 2, GOOSE Performance Class P1 (3ms)

⚫ IEEE 1588: IEEE Std C37.238TM-2017

⚫ DNP: DNP 3.0

⚫ PRP: IEC 62439-3 Ed.3 (IS 2016)

⚫ HSR: IEC 62439-3 Ed.3 (IS 2016)

2.7 Liquid Crystal Display (LCD)

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2

2.8 Terminals

2.8.1 Ring Ferrule

Grounding (Earthing) connection BVR type, 0.8~4mm 2 lead M3 0.6~0.8 N⋅m

2.8.2 Pin Ferrule

Power supply Screw terminals, 0.3~3.3mm 2 lead M2.5 0.4~0.6 N⋅m Contact I/O Screw terminals, 0.3~3.3mm 2 lead M2.5 0.4~0.6 N⋅m

2.9 Measurement Scope and Accuracy

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2

2.10.2 Fault and Disturbance Recording

Duration & Recording position Settable pre-disturbance, post-disturbance and maximum recorded

duration

2.10.3 Binary Input Signal

Resolution of binary input signal ≤1ms

Binary input mode Potential-free contact

2.11 Protective Functions

2.11.1 Current Differential Protection (87B/87DZ)

Current accuracy ≤2.5% of setting or 0.02In whichever is greater

Voltage accuracy ≤2.5% of setting or 0.01Un, whichever is greater

2.11.2 Dead Zone Fault Protection (50DZ)

Time delay accuracy ≤1%xSetting + 40ms

2.11.3 Switch-on-to-fault Protection (50SOTF)

2.11.4 Breaker Failure Protection (50BF)

Current accuracy ≤2.5% of setting or 0.02In, whichever is greater

Time delay accuracy ≤1%×Setting or 25ms (at 2 times current setting)

Voltage accuracy ≤2.5% of setting or 0.01Un, whichever is greater

2.11.5 Phase Overcurrent Protection (50/51P)

Current setting accuracy ≤1%×Setting or 0.01In, whichever is greater

Pickup time ≤25ms (at 2 times current setting)

Operating time delay accuracy

(Definite-time characteristics) ≤1%×Setting or 25ms (at 2 times current setting)

Operating time delay accuracy ≤5% of calculated value + 1% current tolerance or 35ms (1.2≤I/Ip≤30)

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2

(Inverse-time characteristics)

Dropout time accuracy (Definite-time

characteristics) ≤1%×Setting or 30ms

Dropout time accuracy (Inverse-time

characteristics) ≤5% of calculated value or 30ms

2.11.6 Earth Fault Protection (50/51G)

Current setting accuracy ≤1%×Setting or 0.01In, whichever is greater

Pickup time ≤25ms (at 2 times current setting)

(Definite-time characteristics) ≤1%×Setting or 25ms (at 2 times current setting)

(Inverse-time characteristics) ≤5% of calculated value + 1% current tolerance or 35ms (1.2≤I/Ip≤30) Dropout time accuracy (Definite-time

characteristics) ≤1%×Setting or 30ms

Dropout time accuracy (Inverse-time

characteristics) ≤5% of calculated value or 30ms

2.11.7 Phase Overvoltage Protection (59P)

Voltage setting accuracy ≤1%×Setting or 0.1V, whichever is greater

Pickup time ≤35ms (at 1.1 times voltage setting)

(Definite-time characteristics) ≤1%×Setting or 35ms (at 1.1 times voltage setting)

Operating time accuracy

(Inverse-time characteristics) ≤5% of calculated value + 1% voltage tolerance or 40ms (1.1≤U/Up≤2) Drop-out time accuracy ≤1%×Setting or 30ms

Drop-out ratio Settable 0.93~1.00, default value: 0.98

2.11.8 Phase Undervoltage Protection (27P)

Voltage setting accuracy ≤1%×Setting or 0.1V, whichever is greater

Pickup time ≤35ms (at 0.9 times voltage setting)

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2

(Definite-time characteristics) ≤1%×Setting or 35ms (at 0.9 times voltage setting)

Drop-out time accuracy (Inverse-time

characteristics) ≤5% of calculated value + 1% voltage tolerance or 50ms (U/Up≤0.9)

Drop-out time accuracy ≤1%×Setting or 30ms

Drop-out ratio Settable 1.00~1.20, default value: 1.03

2.11.9 Overfrequency Protection (81O)

Frequency setting accuracy ≤ 0.01Hz

Time delay accuracy ≤1%×Setting+70ms

Drop-out time accuracy ≤40ms

Drop-out frequency 1.0×Setting

2.11.10 Underfrequency Protection (81U)

Frequency setting accuracy ≤ 0.01Hz

2.11.11 Frequency Rate-of-change Protection (81R)

Frequency rate-of-change setting

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Receiving route delay Max 2ms

Sending route delay Max 3ms

The capacity of GOOSE receiving and sending is determined by the number of configured boards and control & protection functions

2.12.2 SV

Receiving Control Block (RCB) Max 12

Receiving route delay Max 2ms

The capacity of SV receiving is determined by the number of configured boards and control & protection functions

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3

3 Protection Functions

Table of Contents

3.1 Overview 3-1

3.2 Supported Busbar Arrangements 3-1

3.3 Three-phase Current Element (TCUR3P) 3-7

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3

3.7.2 Function Block Diagram 3-47 3.7.3 I/O Signal 3-48 3.7.4 Logic 3-49 3.7.5 Settings 3-51

3.8 Feeder Dead Zone Fault Protection (50DZ) 3-52

3.8.1 Function Description 3-53 3.8.2 Function Block Diagram 3-54 3.8.3 I/O Signal 3-54 3.8.4 Logic 3-56 3.8.5 Settings 3-56

3.9 BC/BS Switch-on-to-fault (SOTF) Protection (50SOTF) 3-58

3.10 Breaker Failure Protection (50BF) 3-61

3.11 Phase Overcurrent Protection 3-75

3.12 Earth Fault Overcurrent Protection 3-85

3.12.1 Function Description 3-86

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