Measuring transducers MT 4xx



SR100 Supervision Relay is an 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 in 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, MD thermal, THD, etc)
  • Power accuracy class 0.5
  • 16 adjustable alarms
  • Input frequency: 50/60 Hz, 400 Hz
  • Serial communication (RS232 or RS485 up to 115,200 bit/s) and USB 2.0
  • MODBUS RTU communication protocol
  • Up to 4 I/O (analogue outputs, alarm outputs, pulse outputs, general purpose relay output, general purpose solid-state output)
  • Single wide auxiliary power supply range 24 –300 V DC, 40 – 276 V AC
  • Automatic range of current and voltage (max. 12.5 A and 600 VL-N)
  • Housing for DIN rail mounting
  • User-friendly setting software, MiQen


  • MT 440: programmable multifunctional transducer
  • MT 418: programmable current transducer
  • MT 416: programmable voltage transducer
  • MT 408: current self powered measuring transducer
  • MT 406: voltage self powered measuring transducer