Circuit breakers
xEffect FRCdM Type AC, A, U and R residual current circuit breakers
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xEffect FRCdM Type AC, A, U and R residual current circuit breakers

This residual current circuit breaker is part of the xEffect series for industrial/commercial applications. The FRCdM meets the highest requirements for the protection of both people and equipment. The FRCdM Type A is designed for systems with alternating and pulsating direct currents.

Type A RCCBs will also operate correctly in the presence of smooth direct residual currents up to 6 mA.

Design according to
IEC 61008
Tripping current
all-current sensitive
Mixed frequencies
up to 50 kHz

Core features

  • Digital technology for maximum system availability
  • Real-time measurement of residual currents
  • Easy operation and refitting
  • For fault current/residual current protection and additional protection
  • LED monitoring
  • Line voltage-independent 
  • For fault current and additional protection with additional digital features
  • System monitoring: Preventive information/warning before the RCD trips due to leakage currents
    - Integrated auxiliary contact
    - Local indicators
  • A new level of accuracy >that minimises nuisance tripping
  • Comprehensive range of accessories
  • Contact position indicator
  • Fault current tripping indicator
  • Automatic re-setting possible
  • Transparent designation plate
  • Compatible with the other devices from the xEffect series, which can be connected by means of a standard busbar
  • Twin-purpose terminal (lift/open-mouthed) at top and bottom
  • Can be positioned on busbar at top or bottom
  • Free terminal space despite installed busbar
  • FRBmM-1N universal tripping signal switch (also suitable for FAZ) can be retrofitted
  • Z-HK auxiliary switch can be retrofitted
  • Contact position indicator red - green
  • Tripping indicator white - blue
  • Additional safety
    - Sealing option
    - Option to lock in ON or OFF position
  • Time-delayed types suitable for use with standard fluorescent lamps, with or without electronic ballast (30mA-RCD: 30 units per phase conductor, 100mARCD: 90 units per phase conductor)

xEffect digital switchgear

The digital RCCBs from the xEffect series can do more than just switch off. They monitor electrical installations and give advance warning of critical current flows, so that system shutdowns – and the associated costs – can be avoided.

Local indicators
xEffect Residual Current Circuit Breaker FRCdM Type AC, A, U, R - green LED


Fault current < 30 %
Everything is in order.

If the current flow in the system to ground is in the range of 0 % to 30 % of the nominal fault current, the green LED will be active.


Fault current 30% to 50 %
Check the connected devices.

The yellow LED indicates residual currents in the range of 30 % to 50 % of the nominal fault current. This makes it possible to take appropriate counter measures before the system shuts down.

xEffect Residual Current Circuit Breaker FRCdM Type AC, A, U, R - red LED


Fault current > 50 %
Contact an electrician.

If the red LED lights up, the leakage current exceeds 50 % of the nominal fault current. This means that the system is in critical condition – the digital RCCB will only trip if the fault current continues to increase.

Reliable protection for machines

These products help maintain an optimal system and provide additional protection against residual earth leakage currents for a wide range of applications. They come with different tripping characteristics to cater for a variety of electrical systems and components. The devices offer a wide range of nominal currents and comprehensive optional accessories.

Digital RCD with enhanced reliability

Type A: Sensitive to AC and pulsating DC currents. Protection against special forms of residual pulsating DC currents that have not been smoothed.
Type AC: Sensitive to AC currents
Type U: Suitable for use with variable speed drives in household, commercial and industrial applications. This tripping characteristic has been specifically designed for use with frequency converters to prevent nuisance tripping.
Type R: Prevents nuisance tripping due to X-ray devices.