Residual Current Monitoring (RCM)

Residual Current Monitoring (RCM) supports electrical systems with preventive measures around the clock. Continuous monitoring of the residual current checks the electricity that flows into and out of the device to be monitored. If there is a deviation in the current 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 installations. In addition, these devices signal changes in the current flow of the IT infrastructure or AV technology.

RCM ensures that outages in IT and AV systems occur less frequenctly – such as data centers, server rooms and other IT rooms. Residual Current Monitoring thus minimises outages failures in the infrastructure.

Possible residual currents can be detected by the RCM before switching off the supply line. In addition, the device sends a nitification via email or app 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 currents

Type A

Type A 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.

Residual Current Monitoring in the server room

In data centres and server rooms, an error of the IT infrastructure is fatal and expensive. Server racks should be permanently accessible and require consistent availability. It is therefore important that the energy and power supply for the IT system is always accessible.

With sensors Residual Current Monitoring devices can detect and alert the user by sources of danger of a physical natur. These include temperature and humidity deviations or malfunctions and dangers in the power supply. Permanent monitoring means that an IT rack does not have to be switched off immediately, but still has a certain tolerance to alert staff at an early stage.

This also applies to the maintenance of the power circuit during repairs. Thanks to residual current monitoring, repairs can be carried out during server operation without having to switch off the entire server rack.

Advantages of RCM

  1. Personal injury can be prevented by residual current monitoring
  2. Higher availability of the operation of AV/IT systems
  3. Lower personnel costs due to the elimination of DGUV monitoring for sockets in the office
  4. Reduction of high financial costs due to avoidable failures and early warning system
  5. Increased safety of AV/IT infrastructure and industrial systems

Preventive Residual Current Monitoring in GUDE PDUs

Measurement technology for monitoring residual currents is integrated as standard in the intelligent Power Distribution Units (PDUs) from GUDE. The PDUs are equipped with the RCM type A and monitor the residual currents of the devices connected to the PDU. To ensure this, the difference in currents in the supply line between phase and neutral is measured.

The RCM in a server rack makes it possible to localise the source of the residual currents, e.g. devices with insulation faults. This means that the RCM implemented in the PDU can prevent extensive shutdown in the event of a fault.

Optimise your IT infrastructure or AV installation – with reliable Power Distribution Units from GUDE.

All terms in Expert Know-how