About This Document About This Document The manual describes the control, protection, measurement and supervision functions with the information of relevant hardware for PCS-902S Line Distance Relay. Copyright © 2019 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. PCS-902S Line Distance Relay 1 Document Revision History Document Revision History PN: ZL_PCS-902S_X_DataSheet_EN_Overseas General_X Current version: R1.00 Corresponding Version Release Date 2 Document Software R1.00 R1.00 2019-01-31 Description of change Form the original manual. PCS-902S Line Distance Relay Overview Overview PCS-902S is a high-speed transmission line distance relay featuring single-pole and three-pole tripping and reclosing with synchronism check, which can protect overhead and underground lines, feeders and cables on all voltage levels with highest selectivity possible. The large number of protective and automatic functions available permits their utilization in all areas of line protection. The devices contain control, measurement and monitoring functions. The large number of communication interfaces and communication protocols satisfies the requirements of communication-based selective protection and of automated operation. Their modular structure permits line protection devices always to be adapted flexibly to the individual requirements. PCS-902S Line Distance Relay 3 Highlights Highlights Unified software and hardware platform, comprehensive power grid solutions of protection, control, measurement and monitoring, easy to use and maintain. High reliability and redundancy design for drive systems of the sampling circuit and the output 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 analog programming are supported. Modularized hardware design makes the device be easily upgraded or repaired by a qualified service person. It can be mixed 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. Full 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 small size and large size LCD, control and multifunction button Support flush mounting, semi-flush mounting, surface mounting, wall mounting and other mounting methods. Cross screw IO, CT/VT 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 4 PCS-902S Line Distance Relay Highlights PCS-Studio 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 full 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. Support setup up to 40 users and allow each user to own different password and access authority. PCS-902S Line Distance Relay 5 Features Features Two-terminal transmission line application, including overhead line and cable Distance Protection Distance protection adopted the half-wave algorithm is also supported, and its typical operation time is 12-15ms. 6 zones distance protection, independent zero-sequence compensation factor for each zone, the phase-to-ground and phase-to-phase characteristic of distance protection can be set independently. The unique power swing blocking releasing logic and can properly supervise distance protection during power swing, which ensures distance protection to operate correctly for internal faults Unique phase selector has the same protection zone as operation element. The phase selection is automatically resulted according to the reliability of phase selector, so that to avoid probable mistaken multi-phase selection by adopting overreaching phase selector. Special overcurrent element of breaker failure protection, its dropoff time is no more than 15ms. The overcurrent protection is combined with harmonic blocking and cold load starting logic, which can prevent from mal-operation affected by impulse current while the transformer is initiated on no-load. Selectable IEC, ANSI inverse-time characteristic curves, also the curve can be defined by users and the inverse-time dropoff curve selection is supported. Support single-ended impedance-based fault location, mutual compensation for parallel lines arrangement is also available. Both dedicated fiber channel and multiplexing fiber channel are supported, and single mode and multi-mode channel combination operation mode is enable. Communication rate supports 64kbit/s and 2Mbit/s, and communication protocol supports C37.94 and G.703. 6 PCS-902S Line Distance Relay Transmission Line during power swing, and prevents distance protection from mal-operation during power swing. Functions Overview Functions Overview 3VT Busbar 52 21 67P 67G 67Q 21D 50/51P 50/51G 50/51Q 32R 50DZ 46BC 62PD 50BF FR 59P 37 FL 59Q SOTF 59G 81O 27P 81U 81R * 3CT 85 Data transmit/Receive 1VT 25 79 Line Protection Functions ANSI Protection functions Remark Independent pilot zone (forward direction and reverse direction, mho or quadrilateral characteristics) Pilot distance protection 85 PUTT, POTT, Blocking, Unblocking, Zone Extension Current reversal logic Weak infeed echo or echo&trip Open breaker echo Directional zero-sequence comparison element for pilot scheme Pilot directional earth-fault protection 21 Distance protection PTT, Blocking and Unblocking Current reversal logic Weak infeed echo or echo&trip Open breaker echo Up to 6 zones 3 independent phase-to-ground distance elements for each zone 3 independent phase-to-phase distance elements for each zone PCS-902S Line Distance Relay Selectable quadrilateral characteristics or mho 7 Functions Overview characteristics Independent impedance settings and time delays for each zone Zero-sequence current compensation for phase-to-ground distance element Selectable forward direction, reverse direction or non direction (except zone 1 that is fixed as forward direction) 21D DPFC distance protection Load encroachment for each zone Power swing blocking and releasing for each zone Faulty phase selection for each zone Fixed forward direction High-speed operation Supplementary for zone 1 of distance protection Up to 6 stages with independent logic Voltage control element for each stage Optional direction element for each stage, including 67P Phase overcurrent protection 50/51P forward direction, reverse direction or non direction Optional definite-time characteristics and inverse-time characteristics for each stage Trip purpose or alarm purpose for each stage Harmonic control element for each stage Up to 6 stages with independent logic Optional direction element for each stage, including forward direction, reverse direction or non direction 67G Earth fault protection 50/51G Optional definite-time characteristics and inverse-time characteristics for each stage 67Q Negative-sequence 50/51Q protection overcurrent Selectable trip purpose or alarm purpose for each stage Harmonic control element for each stage Up to 2 stages with independent logic Optional direction element for each stage, including forward direction, reverse direction or non direction Optional definite-time characteristics and inverse-time characteristics for each stage SOTF 59P 27P 8 Switch onto fault Phase overvoltage protection Phase undervoltage protection Via distance measurement elements Via dedicated earth fault element Via phase overcurrent element Up to 2 stages with independent logic Optional definite-time characteristics and inverse-time characteristics for each stage Optional phase voltage or phase-to-phase voltage Optional “1-out-of-3” logic or “3-out-of-3” logic Selectable trip purpose or alarm purpose for each stage Up to 2 stages with independent logic Optional definite-time characteristics and inverse-time PCS-902S Line Distance Relay Functions Overview characteristics for each stage Optional phase voltage or phase-to-phase voltage Optional “1-out-of-3” logic or “3-out-of-3” logic Blocked by instantaneous VT circuit failure Selectable trip purpose or alarm purpose for each stage Optional auxiliary criterion, including CB position check and current check Negative-sequence overvoltage 59Q protection 59G Residual overvoltage protection 81O Overfrequency protection 81U Underfrequency protection 81R Rate of change of frequency protection 32R Reverse power protection 37 50BF 50DZ Up to 2 stages with independent logic Selectable trip purpose or alarm purpose for each stage Up to 2 stages with independent logic Selectable trip purpose or alarm purpose for each stage Up to 6 stages with independent logic Voltage control element Up to 6 stages with independent logic Voltage control element Up to 6 stages with independent logic Voltage control element Up to 2 stages with independent logic Selectable trip purpose or alarm purpose for each stage Optional auxiliary criterion, including CB position check and current check Undercurrent protection Selectable trip purpose or alarm purpose for each stage Phase-segregated re-trip and three-phases re-trip Optional current criterion (phase overcurrent element, zero-sequence overcurrent element, negative-sequence Breaker failure protection Dead zone protection overcurrent element) Optional circuit breaker position check Two time delays Clear the dead zone faults between CT and the circuit breaker 62PD Pole discrepancy protection Initiated by three auxiliary contacts of phase-segregate circuit breaker Optional auxiliary criterion (zero-sequence current element or negative-sequence current element) 46BC Broken conductor protection Adopt the ratio of negative-sequence current to positive-sequence current (Ι2/Ι1) to detect the broken conductor. 25 79 Synchrocheck Auto-reclosing Independent logic for auto-reclosing and manually closing One shot or multi-shot 1-pole AR, 3-pole AR or 1/3-pole AR Optional trigger mode, including protection operating and external binary input PCS-902S Line Distance Relay 9 Functions Overview FL Fault location Support synchro-check and voltage check Single-end fault location Double-end fault location Zero-sequence mutual coupling compensation for parallel lines DPFC is the abbreviation of deviation of power frequency component. Control Functions Circuit breaker & disconnector control (Remote/local) Synchronism check for remote and manual closing Voltage switching Measurement functions Energy metering (active and reactive energy are calculated in import respectively export direction) Power (Apparent/Real/Reactive) Power Factor Frequency Event Recorder including 1024 disturbance records, 1024 binary events, 1024 supervision events, 256 control logs and 1024 device logs. Disturbance recorder including 64 disturbance records with waveforms (The file format of disturbance recorder is compatible with international COMTRADE file.) Supervision functions VT circuit supervision CT circuit supervision Trip/Close coil supervision Self diagnostic Pilot communication channel supervision DC power supply supervision Channel status statistic System frequency supervision 10 PCS-902S Line Distance Relay Functions Overview Pilot channel scheme Optional single- or dual- pilot channels (fiber optic) Support G.703 and C37.94 Communication functions Up to four 10Base-T/100Base-TX copper Ethernet ports using IEC 61850, DNP3.0 or IEC 60870-5-103 over TCP/IP Up to four 100Base-FX optical Ethernet ports using IEC 61850, DNP3.0 or IEC 60870-5-103 over TCP/IP Two RS-485 serial ports using IEC 60870-5-103 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 User Interfaces Friendly HMI interface with LCD, easy-to-use keypad aids simple navigation and set-point adjustment Push buttons for open/close, switch for selection between local and remote control, and user's login and logout authority management 4 Programmable operator pushbuttons 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 Additional functions User programmable logic Fault location Fault phase selection PCS-902S Line Distance Relay 11 Functions Overview Parallel line compensation for fault location Switching system phase sequences function (ABC or ACB) Clock synchronization 12 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 IEEE1588: Clock message based on IEEE1588 via optical fibre 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 Cyber security NERC CIP IEC 62351 IEC 62443 IEEE 1686 PCS-902S Line Distance Relay Typical Application Typical Application PCS-902S protect overhead and underground lines, feeders and cables on all voltage levels with highest selectivity possible. 52 52 PCS-902S Optical fibre channel or PLC channel PCS-902S Communication channel via direct dedicated fibre, MUX or PLC Figure 1 Typical application of single circuit breaker Bus1 Single-phase voltage 52 PCS-902S Line 1 Three-phase voltage 52 Line 2 Single-phase voltage 52 Bus2 Figure 0-2 Typical application of double circuit breakers PCS-902S Line Distance Relay 13 Protection Functions Protection Functions Circuit Breaker Position Supervision In order to prevent that wrong status of CB position is input into the device via binary input, appropriate monitor method is used to check the rationality of the binary input. When the binary input of CB open position is detected, the status of CB position will be thought as incorrect and an alarm [Alm_52b] will be issued if there is current detected in the line. Together with the status of circuit breaker and the information of external circuit, this function can be used to supervise control circuit of circuit breaker. Fault Detector (FD) Fault detector is responsible to determine fault appearance on the protected power system. The device will switch to protection calculation after the fault detector picks up, for example the calculation of distance protection, and to determine the operating logic. If the fault is within the protected zone, the device will issue tripping command. The fault detector continuously detects the change of phase-to-phase power frequency current and the calculated zero-sequence and negative-sequence currents. The fault detector includes: 1. Fault detector based on DPFC current: DPFC current is greater than the setting value 2. Fault detector based on residual current: Zero-sequence current is greater than the setting value 3. Fault detector based on negative-sequence current: Negative-sequence current is greater than the setting value Optical Pilot Channel (FO) The devices can transmit Boolean quantities such as blocking signal, permissive signal and transfer trip signal to the remote end via optical fibre channel. Up to 2 optical fibre channels are supported, which can be dedicated optical fibre channel or multiplex channel, the channel mode could be selected as single-mode or multi-mode. The communication rate can be 64kbits/s or 2048kbits/s, and G.703 or C37.94 are optional for communication protocol. 8 digital bits are integrated in each frame of transmission message for various applications, and 8 binary signals are configurable. Each received message frame via fibre optical channel will pass through security check to ensure the integrity of the message consistently. Pilot Distance Protection (85) Pilot distance protection requires communication channel to exchange protection information at both ends. The channel may be dedicated or multiplexed channel through optical fiber or any other communication media. Pilot distance protection has schemes of permissive underreaching transfer trip (PUTT), permissive overreaching transfer trip (POTT) and blocking. The device provides dual pilot 14 PCS-902S Line Distance Relay Protection Functions distance protections. The communication media and mode can be independent each other. Pilot distance protection determines whether it will send the signal to the remote end according to the discrimination result of the distance element or direction element. Pilot distance protection can be divided into permissive scheme and blocking scheme according to whether the signal sent is used to permit tripping or block tripping. For permissive scheme, it can be divided into overreaching mode or underreaching mode according to the setting of distance element and scheme selected, furthermore, it will provide the unblocking scheme as auxiliary function. For overreaching mode, current reversal logic and weak infeed logic are available for parallel line operation and weak power source situation respectively. Pilot Directional Earth-fault Protection (85) Pilot directional earth-fault protection can be used independently, for example, no distance protection is equipped with the device but fast operation is required for the whole line, or it is used as backup protection of pilot distance protection to enhance the sensitivity for an earth fault with high fault resistance. Pilot directional earth-fault protection comprises permissive scheme and blocking scheme. It can share pilot channel 1 with pilot distance protection, or uses independent pilot channel 2. For underreach mode, pilot directional earth-fault always adopts independent pilot channel 2. Sending permissive signal (or terminating sending signal) to the opposite end is controlled by forward direction element. Current reversal logic is available for parallel line operation and CB echo logic is provided once pilot directional earth fault protection is enabled. Current reversal logic is only used for permissive scheme. For blocking scheme, current reversal need not be considered because there is a settable time delay in pilot directional earth-fault protection. Distance Protection (21L) Distance protection includes three independent phase-to-phase measuring loops as well as three independent phase-to-ground measuring loops. Both mho and quadrilateral characteristics are available for different application. In addition, load encroachment, power swing blocking and releasing, and faulty phase selection functions are also provided. Up to 8 zones distance protection are supplied, including 1 zone distance protection with fixed forward direction, 5 zones distance protection with settable direction, 1 zone pilot distance protection with fixed forward direction and 1 zone pilot distance protection with fixed reverse direction. Each zone includes three independent phase-to-phase measuring loops as well as three independent phase-to-ground measuring loops. Phase-to-ground distance element should be compensated by zero-sequence current of local line. Zone 2~6 can select forward direction, reverse direction and non direction. Load encroachment can distinguish effectively between heavily loaded line and faulty line, and the risk of encroachment of the load impedance into the tripping characteristics of the distance protection can be excluded. Power swing blocking and releasing can prevent distance protection from undesired operation during power swing, even if measured impedance reaches into operating area of distance protection. Moreover, PCS-902S Line Distance Relay 15 Protection Functions distance protection can operate reliably when a fault occurs during power swing. Based on distance protection characteristics, faulty phase can be identified correctly. It is benefit for the faulty phase selection which is important to the line which uses phase-segregated circuit breaker and provides valid information for 1-pole AR and fault location. DPFC Distance Protection (21D) As an independent fast protection, DPFC distance protection is mainly used to clear close up fault of long line quickly, its protected range can set as 60%~70% of the whole line. Since DPFC distance protection only reflects fault component and is not influenced by current change due to load variation and power swing, power swing blocking (PSB) function is not required. Moreover, there is no transient overreaching due to infeed current from the remote power supply because it is not influenced by load current. Distance Switch Onto Fault Protection (21SOTF) Distance SOTF protection shares pickup signal as initiation condition with distance protection. It is selectable among zone 2, 3 or 4 of distance protection which is accelerated to trip by manual closing or auto-reclosing, and they can enable or disable be controlled by power swing blocking. Distance SOTF protection equips with independent time delay. Zone 2 of distance protection is fixedly accelerated to trip by 1-pole AR. Zone 2 of distance protection is also accelerated to trip by pole discrepancy condition. For single-phase fault, distance SOTF protection will accelerate to operate if another fault happens to the healthy phase before auto-reclosing. Phase Overcurrent Protection (50/51P) The device can provide six stages of phase overcurrent protection with independent logic. Each stage can be independently set as definite-time characteristics or inverse-time characteristics. The dropout characteristics can be set as instantaneous dropout, definite-time dropout or inverse-time dropout. It can be chosen whether it is blocked by voltage control element or harmonic control element. The direction control element can be set as no direction, forward direction and reverse direction. Phase overcurrent protection picks up when the current exceeds the setting, and operates after a certain time delay. Once the fault disappears, phase overcurrent protection will dropout. Phase overcurrent protection can operate to trip or alarm. Phase Current SOTF Protection (50PSOTF) Phase current SOTF protection will operate to trip three-phase circuit breaker with a time delay when manual closing or auto-reclosing. For in-line transformer application, large inrush current generated during manual closing and auto-reclosing will lead to an undesired operation of phase current SOTF protection. Second harmonic blocking can be selected to prevent maloperation due to inrush current. 16 PCS-902S Line Distance Relay Protection Functions Earth Fault Protection (50/51G) The device can provide six stages of earth fault protection with independent logic. Each stage can be independently set as definite-time characteristics or inverse-time characteristics. It can be chosen whether it is blocked by harmonic control element. The direction control element can be set as no direction, forward direction and reverse direction. The zero-sequence current used by earth fault protection always adopts calculated zero-sequence current. Earth fault protection can operate to trip or alarm. Residual Current SOTF Protection (50GSOTF) Residual current SOTF protection will operate to trip three-phase circuit breaker with a time delay via 1-pole auto-reclosing, manual closing or 3-pole auto-reclosing. For in-line transformer application, large inrush current generated during manual closing and auto-reclosing will lead to an undesired operation of residual current SOTF protection. Second harmonic blocking can be selected to prevent maloperation due to inrush current. Negative-sequence Overcurrent Protection (50/51Q) The device can provide two stages of negative-sequence overcurrent protection with independent logic. Each stage can be independently set as definite-time characteristics or inverse-time characteristics. For parallel lines or a ring network line, the flow direction of negative-sequence current may be different. Considering the selectivity of negative-sequence overcurrent protection, the direction control element can be set as no direction, forward direction and reverse direction. Negative-sequence overcurrent protection can operate to trip or alarm. Phase Overvoltage Protection (59P) The device can provide two stages of phase overvoltage protection with independent logic. When a high voltage occurs in the system, phase overvoltage protection will operate to isolate the fault from the system after a time delay if the voltage is greater than the setting. In addition, phase overvoltage protection also provides the alarm function to notify that there is the overvoltage in the system and find the cause timely to prevent from further deterioration of the fault. Each stage of phase overvoltage protection can be independently set as definite-time characteristics or inverse-time characteristics. The dropout characteristics can be set as instantaneous dropout and definite-time dropout. Phase voltage or phase-to-phase voltage can be selected to be used by the protection calculation. “1-out-of-3” or “3-out-of-3” logic can be selected for the protection criterion. (1-out-of-3 means any of three phase voltages, 3-out-of-3 means all three phase voltages). Residual Overvoltage Protection (59G) The device can provide two stages of residual overvoltage protection with independent logic. When the PCS-902S Line Distance Relay 17 Protection Functions residual voltage is greater than the setting, residual overvoltage protection will operate to isolate the fault from the system after a time delay. In addition, residual overvoltage protection also provides the alarm function to notify that there is an earth fault leading to residual voltage generation, and find the cause timely to prevent from further deterioration of the fault. Residual overvoltage protection supports definite-time characteristics. The dropout characteristics can be set as instantaneous dropout and definite-time dropout. Negative-sequence Overvoltage Protection (59Q) The device provides two stages of negative-sequence overvoltage protection. If negative-sequence voltage is greater than the setting, negative-sequence overvoltage protection will operate. Negative-sequence overvoltage protection is with independent definite-time characteristics and definite-time or instantaneous dropout characteristics. Phase Undervoltage Protection (27P) The device can provide two stages of phase undervoltage protection with independent logic. When the voltage drops in the system and it is lower than the setting, phase undervoltage protection will operate to isolate the fault from the system after a time delay. In addition, phase undervoltage protection also provides the alarm function to notify that there is the undervoltage in the system and find the cause timely to prevent from further deterioration of the fault. Each stage of phase undervoltage protection can be independently set as definite-time characteristics or inverse-time characteristics. The dropout characteristics can be set as instantaneous dropout and definite-time dropout. Phase voltage or phase-to-phase voltage can be selected to be used. “1-out-of-3” or “3-out-of-3” logic can be selected for the protection criterion. (1-out-of-3 means any of three phase voltages, 3-out-of-3 means all three phase voltages). The circuit breaker position with/without the current condition can be as an auxiliary criterion for phase undervoltage protection. Overfrequency Protection (81O) The device can provide six stages of overfrequency protection. If the system frequency is greater than the setting, overfrequency protection will operate to remove some part of active power supplies from the system. Overfrequency protection is with independent definite-time characteristics and with instantaneous dropout characteristics. Underfrequency Protection (81U) The device can provide a six stages of underfrequency protection. If the system frequency is less than the setting, underfrequency protection will operate to shedding some part of loads from the system. Underfrequency protection is with independent definite-time characteristics and with instantaneous dropout characteristics. 18 PCS-902S Line Distance Relay Protection Functions Frequency Rate-of-change Protection (81R) The device can provide six stages of frequency rate-of-change protection. If the system frequency rate-of-change is greater than the setting, frequency rate-of-change protection will operate. Frequency rate-of-change protection is with independent definite-time characteristics and with instantaneous dropout characteristics. Reverse Power Protection (32R) The device can provide two stages of reverse power protection. If the reverse power is detected and it is greater than the setting, reverse power protection will operate. Reverse power protection is with independent operating definite-time characteristics and with instantaneous dropout characteristics. Reverse power protection can be enabled or disabled by the settings and the signals. For some specific applications, reverse power protection needs to be blocked by the external signal, so the device provides an input signal to be used to block reverse power protection. Undercurrent Protection (37) The device can provide one stage of undercurrent protection for tripping purpose or alarm purpose. For different protected equipment, single-phase criterion or three-phase criterion can be selected. The circuit breaker position and the load current also can be taken as the enabling conditions of undercurrent protection. Undercurrent protection is with definite-time operating characteristics and instantaneous dropout characteristics. Breaker Failure Protection (50BF) According to the tripping information from the device and the auxiliary information (the current and the position) of target circuit breaker, breaker failure protection constitutes the criterion to discriminate whether the target circuit fails to open. If the criterion is confirmed, breaker failure protection will operate to trip the target circuit breaker with the re-tripping time delay, trip it again with the first time delay and trip the adjacent circuit breakers with the second time delay. As a special backup protection, breaker failure protection can quickly isolate the fault, reduce the affected range by the fault, keep system stability and prevent generators, transformers and other primary equipments from seriously damaged. For breaker failure protection, phase-segregated re-trip, three-phases re-trip and two time delays are available. Dead Zone Protection (50DZ) For some wiring arrangement (for example, circuit breaker is located between CT and the line), if fault occurs between CT and circuit breaker, line protection can operate to trip circuit breaker quickly, but the fault have not been cleared since local circuit breaker is tripped. Here dead zone protection is needed in order to trip relevant circuit breaker. PCS-902S Line Distance Relay 19 Protection Functions Broken Conductor Protection (46BC) Broken-conductor fault mainly is single-phase broken or two-phases broken, so broken conductor protection based on the ratio of negative-sequence current to positive sequence current can detect the broken-conductor fault. According to the ratio of negative-sequence current to positive-sequence current (I2/I1), it is used to judge whether there is an broken-conductor fault. Negative-sequence current under normal operating condition (i.e. unbalance current) is due to CT error and unbalance load, so the ratio of negative-sequence current to positive-sequence current (amplitude) is relative steady. The value with margin can then be used as the setting of broken conductor protection. It is mainly used to detect broken-conductor fault and CT circuit failure as well. Pole Discrepancy Protection (62PD) The pole discrepancy of circuit breaker may occur during operation of a breaker with segregated operating gears for the three phases. Pole discrepancy protection determines three-phase breaker pole discrepancy condition by its phase segregated CB auxiliary contacts. In order to improve the reliability of pole discrepancy protection, zero-sequence current element or negative-sequence current element can be selected as auxiliary criterion. Transfer Trip (TT) The device provides phase-segregated transfer trip and three-phases transfer trip, which can be controlled by local fault detector. In addition, the input signals of phase-segregated transfer trip and three-phases transfer trip are always supervised, and the device will issue an alarm and block transfer trip once the binary input is energized for longer than the setting value. Both phase-segregated transfer trip and three-phases transfer can be selected to operate to block AR. Trip Logic (TRP) Trip logic gathers signals from phase selection and protection tripping elements and then converts the operation signal from protection tripping elements to appropriate tripping signals. The device can implement phase-segregated tripping or three-phase tripping, and may output the contact of blocking AR and the contact of initiating breaker failure protection. Automatic Reclosure (79) AR can be used with either integrated device or external device. When AR is used with integrated device, the internal protection logic can initiate AR, moreover, a tripping contact from external device can be connected to the device via input signal to initiate integrated AR. When AR is used as an independent device, it can be initiated by operating signal of protections. The device can output some configurable output signals (such as, contact signals or digital signal, for example, GOOSE signal) to initiate external AR or block external AR. The contact signals includes phase-segregated tripping signal, single-phase tripping signal, three-phase tripping signal, blocking AR 20 PCS-902S Line Distance Relay Protection Functions signal and protection operating signal, etc,. According to requirement, these contacts can be selectively connected to external AR. According to the requirement, the device can be set as one-shot or multi-shot AR. When adopting multi-shot AR, the AR mode of first time reclosing can be set as 1-pole AR, 3-pole AR or 1/3-pole AR. The rest AR mode is only 3-pole AR. Fault Location (FL) The device provides single-end fault location. Fault location picks up after the device operates to trip when there is a fault in the line. If the pickup time is greater than 25ms, fault location is calculated with a time delay of 10ms after the device operates to trip. If the pickup time is smaller than 25ms, fault location is calculated with a time delay of 20ms after the device operates to trip. When there is a protection tripping with faulty phase selection, the calculation of the fault impedance is initiated. According to the fault impedance to locate the fault point, two calculation results are provided, which is the length of the fault point distance from the end of the device and its percentage of lines length. For parallel lines, there is a mutual coupling between each phase, and there is also a mutual coupling between parallel lines. The coupling strength between parallel lines associated with the transposition way. For parallel lines with fully transposition, positive-sequence and negative-sequence mutual coupling is very small, and usually can be ignored. But zero-sequence mutual coupling has a greater influence on the line, so the measured impedance must consider the effect. PCS-902S Line Distance Relay 21 Control Functions Control Functions Switchgear Control A control command can realize various control signals such as the CB/DS/ES opening/closing. In order to ensure the reliability of the control output, a locking circuit is added to each control object. The operation is strictly in accordance with the selection, check and execution steps, to ensure that the control operation can be safely and reliably implemented. In addition, the device has a hardware self-checking and blocking function to prevent hardware damage from maloperation output. When the device is in the remote control mode, the control command may be sent via the IEC 60870-5-103 or IEC 61850 protocol; when it is in the local control mode, the local operation may be performed on the device LCD or panel handle. A complete control process is: 1. Protocol module sends a selection command; 2. Control module responds the success or failure result of selection; 3. If the selection is successful, the protocol module sends an execution command, otherwise it sends a cancel command; 4. Control module responds the success or failure result of execution; 5. The control operation may be open/close or up/down/stop. When the device is in the maintenance status, it can still respond to local control commands. The switchgear control function can cooperate with functions such as synchronism check and interlocking criteria calculation to complete the output of the corresponding operation command. It can realize the normal control output in one bay and the interlocking and programmable logic configuration between bays. This device supports the following functional control module: Module Description CSWI Control of circuit breaker (CB), disconnector switch (DS) or earthing switch (ES) RMTLOC Remote or local control mode XCBR Synthesis of CB position, three-phase or phase separated XSWI Synthesis of DS/ES position SXCBR/SCSWI Trip statistics of CB/DS/ES RSYN Synchronism check for CB closing CILO Interlocking logic for CB/DS/ES control MCSWI Manual control of CB/DS/ES 22 PCS-902S Line Distance Relay Control Functions The initiation of a control command may be sent to the device by the SCADA or the NCC through protocol IEC 60870-5-103 or IEC 61850. It may also be the operation of the device LCD or the manual triggering through configured signal. The command is sent by the CPU to the control module for processing, and a control record is made on the CPU module according to the control result. Manual Closing Synchronism Check The synchronism check includes synchro-check and dead charge check. By comparing between the reference voltage and the synchronization voltage, the synchro-check is satisfied if the voltage difference, frequency difference, slip frequency difference and phase angle difference are all within their setting ranges. The dead charge check mode checks only the synchro-check voltage. Several dead charge check modes are supported, including dead synchronism voltage & dead reference voltage check, live synchronism voltage is & dead reference voltage, synchronism voltage is dead & live reference voltage, dead reference voltage, dead synchronism voltage, live synchronism voltage & dead reference voltage or dead synchronism voltage & live reference voltage, dead synchronism voltage or reference voltage. Voltage Switching The voltage switching function can be used to switch the reference and synchronization voltages for double busbar and 3/2 CB arrangements. The "Near priority" principle is adopted by default, and the user interface for programmable switching logic is also reserved. For double busbar arrangement, selection of appropriate voltage signals from Bus 1 and Bus 2 for synchronizing are required. Line VT signal is taken as reference to check synchronizing with the voltage after voltage selection function. For one and a half breakers arrangement, selection of appropriate voltage signals among Line1 VT, Line2 VT and Bus 2 VT as reference voltage to check synchronizing with Bus 1 voltage signal for closing breaker at Bus 1 side. PCS-902S Line Distance Relay 23 Monitoring Functions Monitoring Functions VT Circuit Supervision (VTS) VT circuit supervision can detect failure of single-phase, two-phase and three-phase on protection VT. Under normal condition, the device continuously supervises input voltage from VT, VT circuit failure signal will be activated if residual voltage exceeds the threshold value or positive-sequence voltage is lower than the threshold value. If the device is under pickup state due to system fault or other abnormality, VT circuit supervision will be disabled. VT (secondary circuit) MCB auxiliary contact as a binary input can be connected to the binary input circuit of the device. If MCB is open, the device will consider the VT circuit is not in a good condition and issues an alarm without a time delay. If the auxiliary contact is not connected to the device, VT circuit supervision will be issued with time delay as mentioned in previous paragraph. CT Circuit Supervision (CTS) Under normal conditions, CT secondary signal is continuously supervised by detecting the residual current and voltage. If residual current is larger than the setting whereas residual voltage is less than the setting, and any phase current is less than 0.04In, CT circuit failure is considered. 24 PCS-902S Line Distance Relay Hardware Hardware Front Panel 6 1 3 2 5 6 1 4 2 5 7 3 4 7 1. Front-panel status indication and control of switches 2. Easy-to-use keypad aids simple navigation and set-point adjustment 3. Push buttons for open/close, switch for selection between local and remote control, and user's login and logout authority management 4. Programmable operator pushbuttons with user-configurable labels 5. RJ45 debugging port 6. Up to 18 programmable target LEDs with user-configurable labels 7. Target reset Rear Panel 5 5 6 6 1 1 2 3 7 8 PCS-902S Line Distance Relay 4 2 3 4 7 8 25 Hardware 5 5 6 6 1 1 2 3 4 7 2 4 7 8 8 1. Current and voltage analog inputs 2. Binary inputs 3. Binary outputs 4. Power supply and binary I/O 5. Copper Ethernet port 6. Fiber-optic Ethernet port 7. RS-232 or RS-485 serial port 8. RJ45 debugging port 26 3 PCS-902S Line Distance Relay Hardware Ia1 Ib1 Ic1 Ia2 UB2 UL1 UB1 Ua Ub 0224 0223 0222 0221 0220 0219 0218 0217 0216 0215 0214 0212 Ic2 0213 0211 0209 0210 Ib2 Uc BI_01 + 0501 BI_02 + 0502 + 0516 … Ethernet (RJ 45 and LCConnector) To SCADA 0208 0207 0206 0205 0204 0203 0202 0201 Typical Wiring BI_16 0517 - 0518 - + 0519 BI_18 + 0520 + 0534 … BI_17 BI_32 0101 1B 0102 SGND 0103 0104 2B 0105 SGND 0106 BI_01 + COM To the screen of other coaxial cable with single point earthing 2A COM 1A 0108 SGND 0109 TTL 0110 + Clock SYN 0107 SYN- - 0536 - P101 P102 BI_02 SYN+ 0535 - P103 P104 - P105 - BI_03 + P106 BI_04 + P107 + P112 Console 0601 0603 BO_02 0604 P113 BO_09 0618 BO_01 P114 P115 BO_02 0619 0621 BO_11 0622 P116 … BO_10 0620 BO_05 P121 P122 P123 … 0631 BI_09 … 0617 … BO_01 0602 BO_Fail 0632 BO_16 0633 BO_16 Power Supply 0634 0635 BO_17 0636 BO_17 P124 P125 PWR+ P126 PWR- External DC power supply Grounding Bus Figure 2 Typical wiring with pin ferrule PCS-902S Line Distance Relay 27 Ia1 Ib1 Ic1 Ia2 UB2 UL1 UB1 Ua Ub 0224 0223 0222 0221 0220 0219 0218 0217 0216 0215 0214 0212 Ic2 0213 0211 0209 0210 Ib2 Uc BI_01 + 0501 BI_02 + 0502 + 0525 … Ethernet (RJ 45 and LCConnector) To SCADA 0208 0207 0206 0205 0204 0203 0202 0201 Hardware BI_25 0526 BI_01 + P101 P102 BI_02 0101 1B 0102 SGND 0103 2A 0104 0107 SYN- 0108 SGND 0109 TTL 0110 - + P106 BI_04 + P107 + P112 BI_09 P113 BO_01 P114 P115 BO_02 P116 … SYN+ P104 P105 … 0106 Clock SYN 0105 P103 BI_03 COM 2B SGND - COM To the screen of other coaxial cable with single point earthing 1A + - Console BO_05 0601 P121 P122 P123 BO_01 0602 BO_Fail P124 0603 BO_02 0604 0626 … 0625 Power Supply BO_13 P125 PWR+ P126 PWR- External DC power supply Grounding Bus Figure 3 Typical wiring with ring ferrule 28 PCS-902S Line Distance Relay Installation Installation Dimensions The device includes two kinds of case sizes Case size (mm) H1 H2 D1 D2 W1 W2 6U, 1/2 x 19'' 265.9 253 243 233.5 219.4 208.4 6U, 1/1 x 19'' 265.9 253 243 233.5 453 442 Note: The dimensions of device depth include the dimension of terminal connector without wire harness 22mm. Certain mounting method needs special mounting accessory for support. PCS-902S Line Distance Relay 29 Installation Flush Mounting 30 PCS-902S Line Distance Relay Installation Case size (mm) H3 H4 D3 W3 W4 W5 6U, 1/2 x 19'' 190.5 259 9.5 229.4 263.4 246.4 6U, 1/1 x 19'' 190.5 259 9.5 463 497 480 Semi-flush Mounting PCS-902S Line Distance Relay 31 Installation Case size (mm) H3 H4 D4 D5 W3 W4 W5 6U, 1/2 x 19'' 190.5 259 82.5 160.5 229.4 263.4 246.4 32 PCS-902S Line Distance Relay Installation Surface mounting Case size (mm) H5 D6 D7 W6 6U, 1/2 x 19'' 254.5 4~10 243—D6 212.4 PCS-902S Line Distance Relay 33 Installation Wall Mounting Note: The wall mounting method needs special mounting accessory for wall support. 34 PCS-902S Line Distance Relay Installation Case size (mm) H6 H7 D8 W7 W8 6U, 1/2 x 19'' 212.4 280 4~10 280.4 248.4 Rack Mounting Cut-out PCS-902S Line Distance Relay 35 Installation Single 6U, 1/1 x 19'' Single 6U, 1/2 x 19'' 36 PCS-902S Line Distance Relay Installation Dual 6U, 1/2 x 19'' PCS-902S Line Distance Relay 37 Installation 38 PCS-902S Line Distance Relay Technical Data Technical Data Electrical Specifications AC Current Input Phase rotation ABC or ACB Nominal frequency (fn) 50Hz, 60Hz Rated current (In) 1A/5A (settable) Linear to 0.05In~40In Thermal withstand -continuously 4In -for 10s 30In -for 1s 100In -for half a cycle 250In Burden <0.05VA/phase @1A, <0.25VA/phase @5A AC Voltage Input Phase rotation ABC or ACB Nominal frequency (fn) 50Hz, 60Hz Rated voltage (Un) 100V~130V Linear to 1V~300V Thermal withstand Phase-to-ground Phase-to-phase -continuously 300V 519V -10s 600V 1038V -1s 660V 1141V Burden at rated <0.10VA/phase @100V Power Supply Standard PCS-902S Line Distance Relay IEC 61000-4-29:2000 39 Technical Data 100Vac/110Vac/115Vac/120Vac Rated voltage 110Vdc/125Vdc/220Vdc/250Vdc 127Vac/220Vac/230Vac/240Vac/250Vac Permissible voltage range 88~300Vdc 80~275Vac Permissible AC ripple voltage ≤15% of the nominal auxiliary voltage Burden Quiescent condition <15W Operating condition <20W Binary Input: Settable pickup voltage and dropoff voltage Rated voltage 110Vdc 125Vdc 220Vdc 250Vdc Rated current drain 0.73mA 0.83mA 1.47mA 1.67mA 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 (continuously) Binary Input: Settable pickup voltage and dropoff voltage Rated voltage 110Vac 220Vac Rated current drain 0.73mA 1.47mA On value (default set) 69.3~132Vac 138.6~264Vac Off value (default set) <55Vac <110Vac Maximum permissible voltage 300Vac Withstand voltage 2000Vac, 2800Vdc (continuously) Binary Input: Settable pickup voltage and dropoff voltage Rated voltage 24Vdc 48Vdc Rated current drain 0.16mA 0.32mA On value (default set) 15.12~28.8Vdc 30.24~57.6Vdc Off value (default set) <12Vdc <24Vdc 40 PCS-902S Line Distance Relay Technical Data Maximum permissible voltage 300Vdc Withstand voltage 2000Vac, 2800Vdc (continuously) Binary Output: Tripping/signaling contact Output mode Potential free contact Max. system voltage 250Vac, 300Vdc Continuous carry 10A Pickup time (Typical value) <5ms Dropoff time (Resistive load) <6ms 0.5A@48Vdc 0.35A@110Vdc Breaking capacity (L/R=40ms) 0.30A@125Vdc 0.20A@220Vdc 0.15A@250Vdc 0.5A@48Vdc 0.35A@110Vdc Cyclic Capacity (2.5 cycle/second, 0.30A@125Vdc L/R=40ms) 0.20A@220Vdc 0.15A@250Vdc 30A@3s Short duration current 50A@1s Durability (Loaded contact) 10000 operations Binary Output: Heavy-capacity tripping contact Output mode Potential free contact MOV Protection (maximum voltage ) 350Vdc, 275Vac Continuous carry 10A Pickup time (Typical value) <1ms Dropoff time (Resistive load) <10ms PCS-902S Line Distance Relay 41 Technical Data 10A@48V 10A@110V Breaking capacity (L/R=40ms) 10A@125V 10A@250V 10A@48V L/R=40ms Cyclic Capacity (4cycles in 1 second, 10A@110V L/R=40ms followed by 2 minutes idle for thermal 10A@125V L/R=40ms dissipation) 10A@250V L/R=20ms 30A@3s Short duration current 50A@1s Durability (Loaded contact) 10000 operations Mechanical Specifications Chassis color Silver grey Weight per device Approx. 8.66kg (6U, 1/2) Approx. 13.88kg (6U, 1/1) Chassis material Aluminum alloy Location of terminal Rear panel of the device Device structure Plug-in modular type @ rear side, integrated frontplate Protection Class Standard IEC 60529-2013 Front side IP52 Other sides IP50 Rear side, connection terminals IP20 Ambient Temperature and Humidity Range Standard IEC 60255-1:2009 -40°C to +80°C (Readability of display may be impaired below -20°C and Operating temperature above 70℃ ) 42 PCS-902S Line Distance Relay Technical Data Transport and storage temperature -40°C to +80°C range Permissible humidity 5%-95%, without condensation Pollution degree Ⅱ Altitude <3000m Communication Port EIA-485 Port Baud rate 4.8kbit/s, 9.6kbit/s, 19.2kbit/s, 38.4kbit/s, 57.6kbit/s, 115.2kbit/s Protocol IEC 60870-5-103:1997 or Modbus Max. capacity 32 Max. transmission distance 500m Safety level Isolation to ELV level Twisted pair Screened twisted pair cable Ethernet Port Connector type RJ-45 LC Transmission rate 100Mbits/s Transmission standard 100Base-TX 100Base-FX Max. transmission distance 100m 2km (1310nm) Protocol IEC 60870-5-103:1997, DNP 3.0 or IEC 61850 Safety level Isolation to ELV level Optical Fibre Port: For Station Level Characteristic Glass optical fiber Connector type LC Fibre type Multi mode Max. transmission distance 2km Wave length 1310nm PCS-902S Line Distance Relay 43 Technical Data Transmission power 50μm: -24dBm Minimum receiving power Min -31dBm Margin 50μm: -7dBm 62.5μm: -20dBm 62.5μm: -9dBm Optical Fibre Port: For Pilot Communications Characteristic Glass optical fiber Connector type ST or FC Fibre type Single mode Multi mode Wave length 1310nm 850nm Transmission power -12dBm 50μm: -23dBm 62.5μm: -19dBm Minimum receiving power -38dBm 50μm: -32dBm 62.5μm: -32dBm Maximum receiving power 0dBm 50μm: -11dBm 62.5μm: -11dBm Margin 26dB 50μm: 9dB 62.5μm: 13dB Max. transmission distance 60km 2km Print Port Type RS-232 Baud Rate 4.8kbit/s, 9.6kbit/s, 19.2kbit/s, 38.4kbit/s, 57.6kbit/s, 115.2kbit/s Printer type EPSON® 300K printer Safety level Isolation to ELV level Clock Synchronization Port Type Serial port Input Demodulated IRIG-B or PPS Nominal Voltage 5Vdc+10% Maximum Voltage 8Vdc Input Impedance 2.5kΩ Isolation 500Vdc 44 PCS-902S Line Distance Relay Technical Data Type Tests Environmental Tests Dry cold test IEC60068-2-1:2007 Dry heat test IEC60068-2-2:2007 Damp heat test, cyclic IEC60068-2-30:2005 Mechanical Tests Vibration IEC 60255-21-1:1988 Class Ⅰ Shock and bump IEC 60255-21-2:1988 Class Ⅰ Electrical Tests Standard IEC 60255-27:2013 Dielectric tests Test voltage 2kV, 50Hz, 1min Impulse voltage tests Test voltage 5kV Overvoltage category Ⅲ Insulation resistance measurements Isolation resistance >100MΩ@500VDC Electromagnetic Compatibility IEC 60255-26:2013 1MHz burst disturbance test Common mode: class Ⅲ 2.5kV Differential mode: class Ⅲ 1.0kV IEC 61000-4-2-2008 class Ⅳ Electrostatic discharge test For contact discharge: 8kV For air discharge: 15kV IEC 60255-26:2013 class Ⅲ Frequency sweep Radio frequency interference tests Radiated amplitude-modulated 10V/m (rms), f=80~1000MHz, 14000~2700MHz PCS-902S Line Distance Relay 45 Technical Data Spot frequency Radiated amplitude-modulated 10V/m (rms), f=80MHz/160MHz/450MHz/900MHz IEC 60255-26:2013 Fast transient disturbance tests Power supply, I/O, Earth: class Ⅳ, 4kV, 5kHz, 5/50ns Communication terminals: class Ⅳ, 2kV, 5kHz, 5/50ns IEC 60255-26:2013 Power supply, AC input, I/O port: class Ⅳ, 1.2/50us Surge immunity test Common mode: 4kV Differential mode: 2kV IEC 60255-26:2013 Conducted RF electromagnetic disturbance Power supply, AC, I/O, Comm. Terminal: Class Ⅲ, 10Vrms, 150 kHz~80MHz Spot frequency 10V/m (rms), f=27MHz/68MHz Power frequency magnetic field immunity IEC 61000-4-8: 2009 class Ⅴ, 100A/m for 1min, 1000A/m for 3s IEC 61000-4-9:2016 Pulse magnetic field immunity class Ⅴ, 6.4/16μs, 1000A/m for 3s Damped oscillatory magnetic field IEC 61000-4-10:2016 immunity class Ⅴ, 100kHz & 1MHz–100A/m IEC 60255-26:2013 Conducted emission 0.15MHz~0.50MHz: 79dB (μV) quasi peak, 66dB (μV) average 0.50MHz~30MHz: 73dB (μV) quasi peak, 60dB (μV) average IEC 60255-26:2013 30MHz~230MHz: 40dB (μV/m) quasi peak @10m, 50dB (μV/m) quasi peak @3m Radiated emission Below 1GHz 230MHz~1000MHz: 47dB (μV/m) quasi peak @10m, 57dB (μV/m) quasi peak @3m Above 1GHz 46 1GHz~3GHz: 56dB (μV/m) average, 76dB (μV/m) peak PCS-902S Line Distance Relay Technical Data @3m 3GHz~6GHz: 60dB (μV/m) average, 80dB (μV/m) peak @3m IEC 60255-26:2013 Up to 200ms for dips to 40% of rated voltage without reset Auxiliary power supply performance 50ms for interruption without rebooting without energy storage board (Typical - Voltage dips configuration) -Voltage short interruptions 500ms for interruption without rebooting with energy storage board (Typical configuration) Liquid Crystal Display (LCD) Type Large size Resolution 320x240 pixels Terminals Ring Ferrule Connection Type Wire Size Screw Type AC current Screw terminals, 1.5~4mm2 lead AC voltage Torque M4 1.6~1.8 N·m Screw terminals, 0.8~4mm lead M4 1.6~1.8 N·m Power supply Screw terminals, 0.8~4mm2 lead M4 0.8~1.4 N·m Contact I/O Screw terminals, 0.8~4mm2 lead M4 0.8~1.4 N·m Grounding (Earthing) Connection BVR type, 0.8~4mm2 lead M3 0.6~0.8 N·m 2 Pin Ferrule Connection Type Wire Size Screw Type Power supply Screw terminals, 0.3~3.3mm2 lead Contact I/O Screw terminals, 0.3~3.3mm lead PCS-902S Line Distance Relay 2 Torque M2.5 0.4~0.6 N·m M2.5 0.4~0.6 N·m 47 Technical Data Measurement Scope and Accuracy Item Range Accuracy Phase range 0°~ 360° ≤±1° Frequency fn±3 Hz ≤ 0.01Hz Currents from protection measurement current transformers ≤ 1.0% of rating (0.05~1.00In) Current 0.05~5.00In ≤ 0.5% of applied quantities (1.00~4.00In) ≤ 1.0% of rating (0.05~1.00Un) Voltage 0.05~1.50Un ≤ 0.5% of applied quantities (1.00~1.50Un) 0.05~1.50Un ≤ 2.0% of rating (0.05~1.00In, 0.05~1.00Un) 0.05~4.00In ≤ 1.0% of applied quantities (1.00~4.00In, 1.00~1.50Un) 0.05~1.50Un ≤ 2.0% of rating (0.05~1.00In, 0.05~1.00Un) 0.05~4.00In ≤ 1.0% of applied quantities (1.00~4.00In, 1.00~1.50Un) 0.05~1.50Un ≤ 2.0% of rating (0.05~1.00In, 0.05~1.00Un) 0.05~4.00In ≤ 1.0% of applied quantities (1.00~4.00In, 1.00~1.50Un) 0.05~1.50Un ≤ 2.0% of rating (0.05~1.00In, 0.05~1.00Un) 0.05~4.00In ≤ 1.0% of applied quantities (1.00~4.00In, 1.00~1.50Un) 0.05~1.50Un ≤ 2.0% of rating (0.05~1.00In, 0.05~1.00Un) 0.05~4.00In ≤ 1.0% of applied quantities (1.00~4.00In, 1.00~1.50Un) Active power (W) Reactive power (VAr) Apparent power (VA) Energy (Wh) Energy (VAh) Management Function Control Performance Control mode Local or remote Response time of local control ≤1s Response time of remote control ≤3s Clock Performance Real time clock accuracy 48 ≤1s/day PCS-902S Line Distance Relay Technical Data Accuracy of GPS synchronization ≤1ms External time synchronization IRIG-B (200-98), PPS, IEEE1588 or SNTP protocol Fault and Disturbance Recording Duration & Recording position Settable pre-disturbance, post-disturbance and maximum recorded duration Sampling rate Up to 9.6kHz Binary Input Signal Resolution of binary input signal ≤1ms Binary input mode Potential-free contact PCS-902S Line Distance Relay 49
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