Residual current monitoring

Residual current monitoring

Universal residual current monitoring

RCM modules make it possible to detect AC and DC residual currents using a measuring sensor.

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The residual current monitoring modules from the EV-RCM series detect AC and DC residual currents based on the requirements in IEC 62752. In combination with existing residual current devices, the modules increase the voltage protection level required by the standard when charging electric vehicles. An optional connection to charging controllers from Phoenix Contact enables convenient state monitoring as well.

Your advantages:

  • Universal residual current detection with a measuring transducer
  • Use and continued operation of type A residual current circuit breaker possible
  • High system availability thanks to continuous residual current monitoring
  • State monitoring in conjunction with Phoenix Contact charging controllers
  • Optional reset using Phoenix Contact charging controllers in the event of errors

Single-channel residual current monitoring module

Single-channel RCM module for residual current monitoring of a charging point  

Single-channel residual current monitoring module

The single-channel EV RCM Basic module has one measuring sensor and is specifically designed for one charging point. In conjunction with residual current safety devices (RCD type A), this version is ideal for use in simple charging points for home use (e.g. wall boxes).

Two-channel residual current monitoring module

Two-channel RCM module for residual current monitoring of two separate charging points  

Two-channel residual current monitoring module

The two-channel EV RCM Compact module is used for universal residual current detection for two separate charging points in one charging station. The separate monitoring using two measuring sensors increases the availability of charging points in a commercial environment. Save space and money thanks to separate signal evaluation in one RCM unit.

Residual current detection when charging electric vehicles

Residual current detection when charging electric vehicles

Residual current safety devices (RCD type A) on the infrastructure side are an essential component of the required safety measures. These safety devices shut off if alternating or pulsing residual currents ≥ 30 mA occur (personnel and plant protection). In the event of potential DC residual current ≥ 6 mA, such as from an insulation fault in a vehicle, appropriate actions must be taken for each charging point in accordance with DIN VDE 0100-722; 2013 and IEC 64/1846; 2012 Low-voltage electrical installations, Part 7-722: Requirements for special installations or locations (Supply of electric vehicles).

The universal RCM modules from Phoenix Contact detect DC and AC residual current and provide additional protection when charging electric vehicles in conjunction with existing residual current safety devices. Optional state monitoring and resetting of the RCM module is possible in conjunction with the charging controllers from Phoenix Contact.

Application example: Residual current monitoring for a charging station for home use

Illustration showing setup of a wall box with residual current monitoring  

Setup of a wall box with residual current monitoring

Even a home charging station can detect residual currents using a single-channel RCM module from Phoenix Contact and use this information to shut off the charging point. This ensures long-term durability of a compact charging point for use at home.

Application example: Residual current monitoring of commercial charging points

Illustration showing the setup of a charging station with separate charging points and residual current monitoring  

Charging infrastructure with 2-channel RCM module

A two-channel RCM module provides the option of monitoring the potential residual current of two separate charging points within a charging station separately. This allows commercial charging infrastructure to benefit from higher availability.

PHOENIX CONTACT (Ireland) Ltd

C6 The Exchange
Calmount Park
Ballymount
Dublin 12
D12 XE18
Ireland
(01)2051-300