Residual current monitoring devices
Thanks to residual current monitoring, you can detect critical operating states before they lead to unwanted interruptions in operation, costly damage to property or even personal injury.
- Reporting instead of switching off
- Highest system availability
- Innovative measuring technology
- Safety in all areas
Only use shielded transformers for systems larger than 500A.
Above this current level, the influence of conductors in the transformer that are not clean and and centrally arranged conductors in the transformer increases, making the measurement result inaccurate. The shielded transformer prevents this magnetic interference.
- Monitoring of fault and leakage currents, as well as insulation resistance
- Premature alarming
- Predictive maintenance of the systems
- Monitoring of N-conductors for overload due to harmonics
- Monitoring of fire-hazardous currents in operating facilities at risk of fire
Explanation of terms:
RCM - Residual Current
Monitor
They monitor residual currents in electrical installations, display the current value and report when response values are exceeded.
RCMA & RCMB
Bender Designation for residual current monitoring devices type B in accordance with IEC 60755 for the Monitoring of alternating currents, pulsating and smooth DC residual currents.
RCMS
Bender Designation for multi-channel residual current monitoring system type A and B to IEC 60755 for monitoring AC currents, pulsating and smooth DC residual currents DC residual currents.
MRCDB - Modular Residual Current Devices
Have the task of tripping a circuit breaker within a specified time, when the residual current exceeds a certain value. Make it possible to Circuit-breakers for personal and fire protection.
Application example of the RCMS460 system
In earthed power supplies, the TN/TT systems, the insulation resistance is determined indirectly via the size of the residual current. Residual current monitors (RCMs) are used here to monitor an electrical system or circuit for a possible fault or residual current (figure above). An alarm message signals when this exceeds a certain value. The RCM should be set in such a way that the alarm message is issued before the standardized automatic switch-off.
