Capacitor Bank Protection Reyrolle 7SR191

The market for power capacitors is continuously growing due to the expanding power network driven by increased customer demand. Using power capacitors reduces power loss and improves system performance, quality, and efficiency.

The Reyrolle 7SR191 Capa device is a numeric protection relay designed to be applied on shunt connected distribution capacitor banks arranged in all common connection configurations.

It has a highly comprehensive functional software package.

Basic Features

  • Programmable fascia
  • Provides control of circuit breakers via fascia, binary inputs and communication SCADA system
  • User definable logic via Quicklogic equations and a graphical design tool
  • Fault, disturbance waveform, and event records
  • 6 user alarms for LCD text indications
  • Trip and close circuit supervision
  • Protection from undercurrent/Loss of Supply (37)
  • Phase unbalance (46M)
  • Thermal overload (49)
  • Instantaneous overcurrent (50)
  • Instantaneous earth fault (50N)
  • Circuit breaker fail (50BF)
  • Time delayed overcurrent (51)
  • Time delayed derived earth fault (51N)
  • Overvoltage by current integration (59C)
  • Capacitor unbalance current (60C)
  • Protection from under/overvoltage (27/59)
  • Protection from neutral voltage displacement (59N)
  • Directional instantaneous overcurrent  (67/50)
  • Directional instantaneous earth fault (67/50N)
  • Directional time delayed overcurrent (67/51)
  • Directional time delayed earth fault (67/51N)
  • Protection from under/over frequency (81)