Get a general overview of the most important functions of the RCM 201-ROGO.


  • Standards-compliant Type A measurement on the busbar

    The RCM 201-ROGO residual current monitoring device complies with standard DIN EN 62020 and is used for monitor systems and consumers that must be operated without interruption. It is ideally suited for monitoring residual currents in TN-S systems. The main application of the stand-alone device is the measurement of Type A residual current for large cross-section or busbar systems. In combination with a Rogowski coil (included in the scope of delivery), the user enjoys flexibility even in confined spaces and also benefits from the retrofitting capability of the measurement device.

  • Flexible measuring current transformer in different lengths:

    • Space-saving and fast installation
    • Easy retrofitting in existing systems
    • No shutdown of the system required for installation
    • Analog output for external measurement devices provided

At a glance

  • High measuring accuracy

    • from 1% to final value
    • Measurement of residual currents in the measurement ranges 5 / 10 / 25 / 125 A
  • Retrofittable

    • Rogowski RCM current transformers for large cable cross sections and busbars up to 4000 A
  • Compatibility

    • Compatible with Janitza measuring device's RCM inputs
  • Standards-compliant to IEC 62020

    • Recording, evaluation and monitoring of Type A residual currents
  • Alarm function

    • Configurable limit values and alarm output via digital output and Modbus
  • Communication

    • RS-485 interface (protocol: Modbus RTU)
    • Compatible with all communication-enabled Janitza Modbus master devices