PCS 924s x technical manual EN overseas general x r1 00

Preface About This Manual The technical manual describes the protection, automation, and supervision functions of PCS-924S stub differential relay, and contains operation principle desc

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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

The technical manual describes the protection, automation, and supervision functions of PCS-924S stub 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

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"

on the target sections of this manual as your job needs and responsibilities dictate An overview of each manual section and section topics follows

Describes the function of various protection elements, gives detailed specifics on protection scheme logic, provides the relevant logic diagrams

6 System Functions

Describes how to perform fundamental operations such as clock synchronization, communicating with the device, switching active setting group, checking relay status, reading event reports and SER (Sequential Events Recorder) records

Appendix A Glossary

Describes the abbreviations adopted in this manual

Document Revision History

PN: ZL_PCS-924S_X_Technical Manual_EN_Overseas General_X

1

1

1.1 Application

PCS-924S is a fully numerical stub differential relay which is mainly designed for protecting

T-zone of one and a half breakers arrangement The protection function of PCS-924S comprises

of current differential protection, phase overcurrent protection and feeder line end fault protection

With its flexibility and the powerful PCS-Studio configuration tool, PCS-924S offers future-oriented

T-zone solutions with high investment security and low operating costs

The PCS-924S 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 could also receive and send MMS messages (such as interlocking signals) or

process level GOOSE messages (such as disconnectors positions and trip signals)

Figure 1.2-1 Functional diagram of PCS-924S

ANSI Protection functions Remark

87S Current differential protection ⚫ Steady-state current differential element (3-terminal

and 2-terminal) 50FLE Feeder line end fault protection ⚫ Definite-time overcurrent element (2 stages)

50P Phase overcurrent protection ⚫ Definite-time overcurrent element (1 stage)

1

⚫ Trip purpose or alarm purpose

⚫ Current measurement at a 1.2kHz sampling rate

⚫ Current measurement at a 9.6kHz sampling rate

⚫ Differential current calculation

⚫ Sequence component calculation

⚫ 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, HSR and RSTP

⚫ One front RJ-45 port and one rear RJ-45 port for debugging

⚫ 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

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

set-point adjustment

⚫ 4 Programmable operator push-buttons with user-configurable labels

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

⚫ 1 RS-485 rear ports for printer

⚫ Language switchover—English+ selected language

⚫ Configuration tool—PCS-Studio

⚫ User programmable logic

⚫ Fault phase selection

⚫ Switching system phase sequences function (ABC or ACB)

⚫ Clock synchronization

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

 IEEE 1588: Clock message based on IEEE 1588 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

⚫ Unified software & hardware platform, comprehensive power grid solutions of protection,

measurement and monitoring, easy to use and maintain

⚫ High reliability and redundancy design for drive systems of the sampling circuit and the output

1

circuit ensure that the 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 complies 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, semi-flush mounting, surface mounting, wall mounting and other mounting methods

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

⚫ Multiple variants with case size 1/1 or 1/2 × 19"

⚫ Protection class of front side is up to IP54

⚫ PCS-Studio is the configuration tool providing all the related functionality for PCS S series devices It ranges from device configuration to entire substation design of bay integration

⚫ Support IEEE 1588, 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

1

2.12 Communication Functions 2-13

2.12.1 GOOSE 2-13 2.12.2 SV 2-13

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

2.1.2 Power Supply

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

Permissible voltage range

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

Quiescent condition <15W (Default hardware configuration)

Additional for each

2

0.004W @ 24VDC 0.008W @ 48VDC 0.015W @ 110VDC 0.32W @ 220VDC 0.41W @ 250VDC Additional for each BO

module

Quiescent condition: <0.1W Additional for each energized binary output: <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)

Number

Up to 84 (6U, 1/2 × 19'', ring ferrule), 105 (6U, 1/2 × 19'', pin ferrule),

259 (6U, 1/1 × 19'', ring ferrule) or 329 (6U, 1/1 × 19'', pin ferrule) binary inputs according to various hardware configurations

Settable pickup voltage and dropout voltage

Maximum permissible voltage 300Vac

Withstand voltage 2000Vac, 2800Vdc (1 min)

Number Up to 84 (6U, 1/2 × 19'', ring ferrule), 105 (6U, 1/2 × 19'', pin ferrule),

Maximum permissible voltage 300Vdc

Withstand voltage 2000Vac, 2800Vdc (1 min)

Number

Up to 84 (6U, 1/2 × 19'', ring ferrule), 105 (6U, 1/2 × 19'', pin ferrule),

259 (6U, 1/1 × 19'', ring ferrule) or 329 (6U, 1/1 × 19'', pin ferrule) binary inputs according to various hardware configurations

2.1.4 Binary Output

Tripping/signaling contact

Max system voltage 250Vac, 300Vdc

Pickup time (Typical value) <5ms

Dropout 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 0.30A@125Vdc 0.20A@220Vdc

2

0.15A@250Vdc

Short duration current

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

Number

Up to 44 (6U, 1/2 × 19'', ring ferrule), 56 (6U, 1/2 × 19'', pin ferrule),

135 (6U, 1/1 × 19'', ring ferrule) or 175 (6U, 1/1 × 19'', pin ferrule) binary outputs according to various hardware configurations

Heavy-capacity tripping contact

MOV protection (maximum voltage) 350Vdc, 275Vac

Pickup time (Typical value) <1ms

Dropout time (Resistive load) <10ms

Breaking capacity (L/R=40ms)

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

Number

Up to 12 (6U, 1/2 × 19'', ring ferrule or pin ferrule) or 40 (6U, 1/1 × 19'', ring ferrule or pin ferrule) binary outputs according to various hardware

2

configurations

2.2 Mechanical Specifications

Weight per device

Approx 8.66kg (6U, 1/2 × 19'') Approx 13.88kg (6U, 1/1 × 19'')

Location of terminal Rear panel of the device

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

Protection Class

Front side

IP52 IP54 (valid for surface mounting mode of 6U, 1/2 × 19'' case with sealing strip)

Rear side, connection terminals IP20

2.3 Ambient Temperature and Humidity Range

2

2.4 Communication Port

2.4.1 EIA-485 Port

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

Max transmission distance 500m

Safety level Isolation to ELV level

Twisted pair Screened twisted pair cable

2.4.2 Ethernet Port

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

Safety level Isolation to ELV level

2.4.3 Optical Fibre Port

For Station Level and Process Level

Characteristics Glass optical fiber

Maximum transmission distance 2km

Minimum receiving power -31dBm

2.4.4 Print Port

2

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

Peak optical input power

Logic level HIGH

Logic level LOW

Maximum -40dBm Maximum -10dBm, Minimum -24dBm

2

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

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

2

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) peak @3m

Auxiliary power supply performance IEC 60255-26:2013

⚫ 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)

2

2.8 Terminals

2.8.1 Ring Ferrule

Connection Type Wire Size Screw Type Torque

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

2.8.2 Pin Ferrule

Connection Type Wire Size Screw Type Torque

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

Item Range Accuracy

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

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

Pickup time ≤30ms (at 2times current setting)

Maximum operating time ≤30ms (at 4 times current setting)

Minimum operating time ≤20ms (at 4 times current setting)

2.11.2 Feeder Line End Fault Protection

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

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

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

2.11.3 Phase Overcurrent Protection

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

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

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

Receiving Control Block (RCB) Max 16 (Typical configuration: 50×FCD+200×BOOL+16×FLOAT)

Sending Control Block (SCB) Max 8 (Typical configuration: 100×BOOL)

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 protection functions

2.12.2 SV

Receiving Control Block (RCB) Max 6 (per board)

Receiving route delay Max 2ms

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

2

3

3.5.5 Settings 3-17

3.6 Trip Logic 3-18

3.6.1 Function Description 3-18 3.6.2 Function Block Diagram 3-18 3.6.3 I/O Signals 3-18 3.6.4 Logic 3-19 3.6.5 Settings 3-19

List of Figures

Figure 3.3-1 3-terminal application 3-5 Figure 3.3-2 Operation characteristic curve of 3-terminal current differential protection 3-6 Figure 3.3-3 Operation characteristic curve of 3-terminal current differential protection 3-7 Figure 3.3-4 Logic of current differential protection 3-11 Figure 3.4-1 Logic of feeder line end fault protection 3-14 Figure 3.5-1 Logic of phase overcurrent protection 3-17 Figure 3.6-1 Simplified tripping logic 3-19

List of Tables

Table 3.1-1 Input/Output signals of three-phase current element 3-1 Table 3.1-2 Settings of three-phase current element 3-2 Table 3.2-1 Input/Output signals of fault detector 3-5 Table 3.3-1 I/O signals of current differential protection 3-8 Table 3.3-2 Settings of current differential protection 3-12 Table 3.4-1 I/O signals of feeder line end fault protection 3-13 Table 3.4-2 Settings of feeder line end fault protection 3-15 Table 3.5-1 I/O signals of phase overcurrent protection 3-16 Table 3.5-2 Settings of phase overcurrent protection 3-17 Table 3.6-1 I/O signals of trip logic 3-18 Table 3.6-2 Settings of trip logic 3-19

3

3.1 Three-phase Current Element (TCUR3P)

Three-phase current element is responsible for pre-processing the sampled value of three-phases

currents and calculating sequence components, amplitudes and phase angles of three phase

currents, etc All calculated information of three-phase current element is used for protection logic

calculation

3.1.1 Function Description

Three-phase current element has following functions:

1 Pre-process three phase currents

2 Calculate information related to three-phase current

When any phase current is greater than 0.04In, the input current signals are valid and the valid

signal will be used by programmable logic application

3.1.2 Function Block Diagram

TCUR3P

CTx.Ia_Sec CTx.Ib_Sec CTx.Ic_Sec

CTx.I2_Sec CTx.3I0_Cal_Sec CTx.I1_Sec

CTx.Ang(Ia-Ib) CTx.Ang(Ib-Ic) CTx.Ang(Ic-Ia) CTx.Ang(Ia)

CTx.Ang(Ic) CTx.Ang(3I0_Cal) CTx.Ang(Ib)

CTx.Flg_OnLoad

CTx.in_ia CTx.in_ib CTx.in_ic

3.1.3 I/O Signals

Table 3.1-1 Input/Output signals of three-phase current element

No Input Signal Description

1 CTx.in_ia Sampled value of phase-A current of CTx

3

2 CTx.in_ib Sampled value of phase-B current of CTx

3 CTx.in_ic Sampled value of phase-C current of CTx

No Output Signal Description

1 CTx.Ia_Sec The amplitude of phase-A current of CTx (secondary value)

2 CTx.Ib_Sec The amplitude of phase-B current of CTx (secondary value)

3 CTx.Ic_Sec The amplitude of phase-C current of CTx (secondary value)

4 CTx.I1_Sec The amplitude of positive-sequence current of CTx (secondary value)

5 CTx.I2_Sec The amplitude of negative-sequence current of CTx (secondary value)

6 CTx.3I0_Cal_Sec The amplitude of calculated residual current of CTx (secondary value)

7 CTx.Ang(Ia-Ib) Phase angle between phase-A and phase-B currents of CTx

8 CTx.Ang(Ib-Ic) Phase angle between phase-B and phase-C currents of CTx

9 CTx.Ang(Ic-Ia) Phase angle between phase-C and phase-A currents of CTx

10 CTx.Ang(Ia) Phase angle of phase-A current of CTx

11 CTx.Ang(Ib) Phase angle of phase-B current of CTx

12 CTx.Ang(Ic) Phase angle of phase-C current of CTx

13 CTx.Ang(3I0_Cal) Phase angle of the calculated residual current of CTx

14 CTx.Flg_OnLoad A flag indicating that any phase current of CTx is greater than 0.04In

3.1.4 Settings

⚫ Access path:

MainMenu  Settings  Global Settings  System Settings

Table 3.1-2 Settings of three-phase current element

No Settings Range Unit Step Default

value Remark

1 CT1.I1n 0~9999 A 1 1000 Primary rated current value of CT1 (i.e the CT

of CB1)

2 CT1.I2n 1 or 5 A - 1 Secondary rated current value of CT1

3 CT2.I1n 0~9999 A 1 1000 Primary rated current value of CT2 (i.e the CT

of CB2)

4 CT2.I2n 1 or 5 A - 1 Secondary rated current value of CT2

5 CT3.I1n 0~9999 A 1 1000 Primary rated current value of CT3 (i.e the CT

Enabled: make connected current polarity reversed

8 CT2.En_RevCT Disabled

Enabled - - Disabled

It is used to adjust the current polarity of CT2 Disabled: keep connected current polarity unchanged

Enabled: make connected current polarity