PCS-9691E Overcurrent Protection

The PCS-9691E overcurrent relay is designed for fast and selective protection, control and monitoring of feeders, shunt capacitor banks, reactors or motors etc. in directly grounded,impedance grounded, Peterson coil grounded or ungrounded system.

  • Overview
  • Functions
  • Features

The PCS-9691E overcurrent relay is designed for fast and selective protection, control and monitoring of feeders, shunt capacitor banks, reactors or motors etc. in directly grounded, impedance grounded, Peterson coil grounded or ungrounded system. This device is suited to be flush mounted into a control panel.

Protection
  • Three-stage phase overcurrent protection. (50/51P)
  • Three-stage neutral overcurrent protection. (50/51N)
  • Three-stage negative sequence overcurrent protection. (50/51Q)
  • Directional ground time overcurrent protection. (67G)
  • Breaker failure protection. (51BF)
  • Thermal overload protection. (49)
  • Broken conductor protection. (46BC)
  • Undervoltage/overvoltage protection. (27/59)
  • Multi-slot three-pole auto-reclosing (Up to 3 slots). (79)
  • Ten (10) available curves complied with ANSI and IEC standard. (IDMT)
  • Thermal model overload curve.
  • Voltage transformer supervision. (VTS)
  • Current transformer supervision. (CTS)
  • Current drift auto-adjustment

Metering and monitoring
  • Tripping/Closing circuit supervision
  • Circuit breaker state monitoring
  • Operation time supervision of breaker
  • 256 SOE records, including tripping, alarm, change of binary inputs and self-check.
  • Eight (8) wave records, up to 4.5 seconds for each wave record, compatible with COMTRADE format.
  • Supervision of tripping time, CBF starting current, CB switching counter, CB travelling time and internal relay fault.

  • Control
    • 10 configurable binary inputs
    • 7 binary outputs for DC voltage (including 4 configurable contacts), 9 binary outputs for AC voltage (including 6 configurable contacts)
    • 8 LEDs, including 5 configurable LEDs
    • Local/remote opening/closing logic of breaker
    • Faceplate buttons for local control of breaker

    Communication and HMI
    • One RS-232 port for testing
    • Two RS-485 ports for communication with SCADA
    • IEC 60870-5-103 DNP 3.0 serial, and MODBUS protocol
    • RCS-PC assistant software for testing
    • Clock Synchronization

  • On the premise of 32 samples per cycle, all data measurement, calculation and logic discrimination could be done within one sampling period. The event recording and protection logic calculation are completed simultaneously.
  • Definite time and inverse time of phase overcurrent protection are both provided.
  • Definite time and inverse time of zero sequence overcurrent protection are both provided
  • This relay constantly measures and calculates analog quantities for metering including phase current and zero sequence current.
  • This relay is equipped with two EIA RS-485 standardized electrical interfaces for uplink communication.
  • This relay can communication with SAS or RTU, the communication protocol of this device is IEC60870-5-103, Modbus or DNP3.0.
  • Event recording function: 32 latest fault reports (up to 8 records in a report), 64 alarm records and 256 records of time tagged sequence of event can be recorded.
  • Fault and disturbance recording function: 16 latest fault waves, and the fault and disturbance file format is COMTRADE, see Section 2.3.3 for more details.
  • This device can store settings, history reports and fault waves in a 2Mbit FRAM, which makes these information does not be lost even the power supply is switched off.