Distance protection relay PCS-9691

under-voltageover-currentunder-current

Product overview
The PCS-9691 relay is a protection, control and monitoring unit for overhead lines, underground cables, transformers and capacitors on solidly grounded, impedance grounded, Peterson coil grounded and ungrounded systems. The device integrates a high-performance functional library, programmable logic, configurable I/O and frequency-tracking. Built on an advanced multiprocessor platform, the PCS-9691 fully complies with IEC 61850 station bus and supports IEC 61850-8-1 MMS.

Protection functions

• Six-stage phase overcurrent protection (50/51P)
• Four-stage directional phase overcurrent protection (67P)
• Six-stage neutral/ground overcurrent protection (50/51N, 50/51G)
• Four-stage directional neutral/ground overcurrent protection (67N/G)
• Two-stage negative-sequence overcurrent protection (46)
• Thermal overload protection for alarm/trip (49)
• Broken conductor detection (46BC)
• Breaker failure element (50BF)
• Dead zone protection (50DZ)
• Undercurrent protection (37)
• Restricted earth fault protection (64REF)
• Two-stage phase-ground or phase-phase undervoltage protection (27)
• Two-stage phase-ground or phase-phase overvoltage protection (59)
• Two-stage ground overvoltage protection (59G)
• One-stage negative sequence overvoltage protection (47)
• Four-stage under-frequency protection (81U)
• Over-frequency protection (81O)
• Frequency rate-of-change protection (81R)
• Directional power protection (32)
• Four-shot three-pole auto-reclosing (79)
• Synchronism check for manual closing and auto-reclosing (25)
• Switch onto fault logic (SOTF)
• Cold load pickup logic (CLP)
• Mechanical protection (MR)
• Fault location (FL)
• Voltage and current drift auto adjustment

Control

• Remote/local control
• Lock/unlock logic
• Front panel control button

Monitoring and supervision

• Tripping circuit supervision (TCS)
• Voltage transformer supervision (VTS)
• Current transformer supervision (CTS)
• Circuit breaker status monitoring
• Self supervision

Communication and synchronization

• Up to two 100Base-FX ports with IEC 61850-8-1 MMS for non-time-critical messages; supports IEC 60870-5-103 over TCP/IP or DNP3.0
• One RS-485 rear port with IEC 60870-5-103 or Modbus
• One RS-485 rear port for clock synchronization
• One front-panel RJ45 port for testing and setting
• Clock synchronization via pulse per second (PPS), IRIG-B and SNTP

Technical specifications

• Model family: PCS-9691
• Application: protection, control and monitoring for overhead lines, underground cables, transformers, capacitors, etc.
• Supported earthing systems: solidly grounded, impedance grounded, Peterson coil grounded, ungrounded
• Platform: advanced multiprocessor platform
• Standards compliance: IEC 61850 station bus compliant; supports IEC 61850-8-1 MMS
• Protocols: IEC 60870-5-103 over TCP/IP, DNP3.0, Modbus
• I/O: configurable I/O (programmable logic)
• Functional library: comprehensive high-performance library including protection, control and monitoring elements
• Control features: remote/local control, lock/unlock logic, front panel control
• Supervision: TCS, VTS, CTS, breaker status monitoring, self supervision
• Communication interfaces: up to two 100Base-FX ports, RS-485 rear ports, front-panel RJ45
• Clock sync methods: PPS, IRIG-B, SNTP
• Integrated features: frequency-tracking, voltage/current drift auto adjustment
• Additional: front-panel RJ45 port for testing and setting