RCS-9628 Busbar Voltage Relay

The RCS-9628 busbar voltage relay is designed for the voltage protection, control and monitoring of busbar in impedance grounded, Peterson coil grounded and ungrounded system. The relay is suitable to be flush mounted into a control panel.

  • Overview
  • Functions
  • Features

The RCS-9628 busbar voltage relay is designed for the voltage protection, control and monitoring of busbar in impedance grounded, Peterson coil grounded and ungrounded system. The relay is suitable to be flush mounted into a control panel.

Protection and Control
  • Undervoltage protection. (27)
  • Overvoltage protection. (59)
  • Residual overvoltage protection (59N)
  • Negative sequence overvoltage element (47)
  • Mechanical protection (MR)
  • Voltage drift automatic adjustment
  • Self supervision
  • Voltage transformer supervision (VTS)

Management and Mertering
  • Tripping circuit supervision
  • Remote control and measurements.
  • 64 Trip records
  • 64 Operating alarm records
  • 64 Self-check alarm records
  • 64 User operating records
  • 8 Disturbance records
  • 256 SOE records, latest records of following elements state changing: operating abnormality alarm elements, self- check alarm elements, protection elements and binary input elements.
  • Circuit breaker operating counter

Auxiliary Testing
  • Virtual SOE records generation
  • Virtual measurement values generation
  • Virtual tripping reports generation
  • Virtual fault wave records generation

  • On the premise of 24 samples per cycle, all data measurement, calculation and logic discrimination can be finished within one sampling period. The event recording and protection logic calculation can be finished simultaneously.
  • Definite time overvoltage protection and residual overvoltage protection are both provided.
  • Negative sequence overvoltage element is provided in this relay.
  • The relay constantly measures and calculates a large amount of analog quantities, such as phase-to-phase voltage, phase voltage, neutral voltage and system frequency.
  • Multiple GPS clock synchronization, including message, pulse per second, and IRIG-B synchronization.
  • The relay is equipped with two EIA RS-485 standardized interfaces and two Ethernet interfaces. Two optional Ethernet interfaces are provided: electrical or optical.
  • The relay can communicate with SAS or RTU using IEC60870-5-103 or modbus.
  • Perfect fault and disturbance record function: 64 latest fault reports, 8 latest fault waves(up to 15s), 64 user operating records, and 256 records of time tagged sequence of event can be recorded.