Residual Current Monitoring

Residual Current Monitoring (RCM) supports electrical systems with preventive measures around the clock. Continuous monitoring of the residual current checks what flows into and out of the device to be monitored. If there is a deviation in the curent flow, the RCM signals this to the user and can prevent personal injuries.

Early alarm notification and less downtime due to Residual Current Monitoring

Residual Current Monitoring devices always detect residual currents in IT or AV companies and in the industry. In addition, these devices signal changes in the IT infrastructure or AV technology.

Residual Current Monitoring ensures that less frequent downtime occurs in IT and AV systems, per example data centers, server rooms and IT rooms. An RCM thus supports less frequent failures in the infrastructure.

Possible residual currents can be detected by the RCM, for example, below critical limits, before switching off the supply line. In addition, the RCM device signals appropriate measures to indicate the replacement of a defective device.

Configurable alarms give the staff an early warning to take care of the defective device before the electrical system is switched off.

Systems for measuring residual current

Type A

This type of residual current involves pure sinusoidal alternating currents or pulsating direct currents. Most residual current protection systems detect type A residual currents. E.g. residual current circuit breakers.

Type F

In addition to type A residual currents, this type detects any AC currents up to 1 kHz.

Type B

This type detects the currents of type F and additionally also smooth DC currents.

Type B+

This residual current protection system corresponds to type B with detection of currents with frequencies up to 20 kHz.

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