Power protection relay PCS-9641

over-currentunder-voltageunder-frequency

Product overview
The PCS-9641 relay is a protection, control and monitoring unit for motors on solidly grounded, impedance grounded, Petersen coil grounded and ungrounded systems. It integrates a comprehensive protection function library, programmable logic, configurable I/O and frequency tracking. The relay is built on an advanced multiprocessor platform and fully supports IEC 61850 station and process bus standards, including IEC 61850-8-1 (MMS, GOOSE).

Protection and Control

• Current differential protection (87M)
• Overcurrent protection (67P, 50P/51P)
• Neutral/ground overcurrent protection (67G, 50/51G)
• Sensitive earth fault protection (67SG/51SG)
• Negative sequence overcurrent protection (46)
• Broken conductor detection (46BC)
• Breaker failure protection (50BF)
• Undercurrent protection (37)
• Undervoltage and overvoltage protection (27/59)
• Zero sequence overvoltage protection (59G)
• Negative sequence overvoltage protection (47)
• Thermal overload element (49)
• RTD temperature protection (RTD)
• Under-frequency, overfrequency and rate-of-change of frequency protection (81U/O/R)
• Reverse power protection (32R)
• Under power protection (37P)
• Power factor / out-of-step protection (55)
• Restart inhibit for starts per time interval (66)
• Starting-time supervision to protect against excessive starting time and locked-rotor conditions (48)
• Remote and local breaker trip/close functions
• Auto-adjustment for voltage and current drift
• Frequency tracking

Monitoring and Metering

• Metering of current, voltage, active/reactive power, power factor, energy and frequency
• Circuit breaker monitoring
• CT and VT failure supervision
• Tripping circuit supervision
• Self-diagnostic functions
• Fault recorder: 64 fault/disturbance records and 8 motor startup wave records
• Total 1024 SOE records, including trips, alarms, binary input changes and operator actions
• 8 motor startup reports; 64 protection operation reports; 1024 supervision alarm, control operation and user operation records
• Complete event recording function: 64 faults and operation sequences, 64 fault waveforms, 256 self-supervision reports and 1024 binary signal change reports

Communication

• Up to four 10Base-T/100Base-TX (RJ45) ports or two 100Base-FX ports with IEC 61850-8-1 (MMS, GOOSE)
• Support for IEC 60870-5-103 over TCP/IP and DNP 3.0
• Two RS-485 rear ports with IEC 60870-5-103 and MODBUS
• Up to six 100Base-FX ports with IEC 61850-9-2 SV and GOOSE for time-critical messages
• One RS-485 rear port for clock synchronization and one RS-232 rear port for printer
• Front RJ45 port for testing and setting
• Clock synchronization via pulse, IRIG-B and SNTP

Specifications / Technical data

• Model: PCS-9641
• Functionality: Motor protection, control and monitoring with a comprehensive protection function library (differential, overcurrent, earth-fault, negative-sequence, thermal overload, RTD temperature, under/over-voltage, frequency protections, reverse/under-power, power factor/out-of-step)
• Startup and supervision: Restart inhibit (66) and starting-time supervision (48) to protect against excessive starting time and locked-rotor conditions
• Fault recording & events: 64 fault/disturbance records, 8 motor startup wave records, 64 fault waveforms, 256 self-supervision reports and a total of 1024 SOE and records for alarms, control and user operations
• Communications: IEC 61850-8-1 (MMS & GOOSE), IEC 61850-9-2 (SV), IEC 60870-5-103 over TCP/IP, DNP 3.0, MODBUS; multiple RJ45 and fiber ports; RS-485 and RS-232; clock sync via pulse/IRIG-B/SNTP
• Platform: Advanced multiprocessor platform with programmable logic and configurable I/O