Supervision Relay SR100


SR100 Supervision Relay is a intended to monitor and protect electrical equipment against common faults on Single-Phase or Three-Phase electrical power networks. SR100 is monitoring all important parameters of the electrical network in both directions (generator to consumer and vice versa) and detects potential faults on the electrical equipment and informs the user about them. For real-time communication CAN/CANOpen interface is build inside SR100 which transfers potential faults to the user system (SCADA, …) with milliseconds response resolution. SR100 is intended to protect the consumers on the electrical network against unattended faults which could occur (Undervoltage, Overvoltage, Underfrequency, Overfrequency, Asymmetry by Voltage, Asymetry by Phase, Imbalance, Load Overrun, Load Underrun, Phase Shift/ROCOF).




  • Measurements of instantaneous values of more than 50 quantities (V, A, kW, kVA, kvar, kWh, kvarh, PF, Hz, THD, etc)
  • Measurements of all required values based only on fundamental wave according to IEC 61400-21 Annex C
  • Power accuracy class 0.5
  • 10 supervision functions based on monitoring conditions (alarms)

–   under/over voltage,
–   under/over frequency,
–   asymmetry – voltage/phase imbalance,
–   load overrun/underrun,
–   LoM – phase shift (dPhi/dt) & ROCOF (df/dt)

  • Input frequency: 50/60 Hz
  • Serial communication (RS232 or RS485 up to 115.200 bit/s), CAN up to 1 Mbit/s and USB 2.0)
  • MODBUS RTU and CANopen communication protocols
  • Up to 4 configurable relay outputs (normal, inverse, latched, pulsed
  • Single wide auxiliary power supply range 20 – 300 Vdc, 48 – 276 Vac
  • Automatic range of current and voltage (max. 12.5 A and 600 VL-N)
  • Housing for DIN rail mounting
  • Two-level password for temper-safe operation
  • User-friendly setting software, MiQen