Earth-leakage protection relay PCS-9671

phase asymmetryunder-voltageover-current

Product Overview
PCS-9671 is a compact numerical transformer protection relay designed for two-winding transformers. It supports reactor or stub-bus current differential protection and can be deployed in one-and-a-half breaker schemes. The device implements restraint and unrestraint differential protections and restricted earth-fault protection, with modular hardware, a scalable function library, programmable logic, configurable I/Os and definable LEDs for project-specific schemes. Two fixed LEDs plus 18 configurable 3-color LEDs (Green/Yellow/Red) are provided. The relay supports IEC 61850 station and process bus applications (IEC 61850-8-1 MMS, GOOSE and IEC 61850-9-2 Sampling Value). A front-panel RJ-45 port simplifies testing, setting, commissioning and maintenance.

Protection and Control

• Restraint current differential protection (87T)
• Unrestraint current differential protection (87UT)
• Restricted earth fault protection (64REF)
• Inrush current blocking using 2nd and 3rd harmonic detection
• Overexcitation blocking using 5th harmonic detection
• CT saturation detection
• Phase overcurrent protection (50/51P)
• Zero-sequence overcurrent protection (50/51G)
• Negative-sequence overcurrent protection (46)
• Thermal protection (49)
• Undervoltage and overvoltage protection (27/59)
• Zero-sequence overvoltage protection (59G)
• Negative-sequence overvoltage protection (47)
• Overexcitation protection (24)
• CT circuit supervision (CTS)

Records and Communications

• 1024 supervision alarm records
• 1024 control operation records
• 1024 user operation records
• 64 fault and disturbance records
• 1024 SOE records
• Up to four 10Base-T/100Base-TX (RJ45) ports or two 100Base-FX ports with IEC 61850-8-1 MMS and IEC 60870-5-103 over TCP/IP
• Two RS-485 rear ports with IEC 60870-5-103
• Up to six 100Base-FX ports supporting IEC 61850-9-2 Sampling Value and GOOSE
• One RS-485 rear port for clock synchronization
• One RS-232 rear port for printer
• One faceplate RJ-45 port for testing and setting
• Clock synchronization via pulse, IRIG-B and SNTP

Auxiliary Testing Functions

• Virtual trip report generation and communication test functions
• Virtual self-supervision report generation and communication test functions
• Virtual binary input state change report generation and communication test functions
• Binary output testing
• Manual trigger for fault recording

Technical specifications

• Application: numerical relay for two-winding transformers; suitable for reactor or stub-bus differential protection and one-and-a-half breaker arrangements
• Protection functions: 87T, 87UT, 64REF, 50/51P, 50/51G, 46, 49, 27/59, 59G, 47, 24, CT supervision (CTS), inrush and overexcitation blocking, CT saturation detection
• Hardware: modular design, configurable I/Os, programmable logic, scalable function library
• Indicators: 2 fixed LEDs + 18 configurable 3-color LEDs (Green/Yellow/Red)
• Record capacity: 1024 alarm records, 1024 control operation records, 1024 user operation records, 64 disturbance records, 1024 SOE records
• Communication protocols: IEC 61850-8-1 MMS, GOOSE; IEC 61850-9-2 Sampling Value; IEC 60870-5-103
• Network interfaces: up to 4×10Base-T/100Base-TX (RJ45) or 2×100Base-FX; up to 6×100Base-FX for SV/GOOSE
• Serial ports: multiple RS-485 ports, RS-232 for printer
• Faceplate: RJ-45 port for testing and setting
• Clock sync: pulse, IRIG-B, SNTP; RS-485 port for clock synchronization
• Testing features: virtual trip/self-supervision/binary I/O tests and manual fault recording trigger