Type A
RCDs

Type A RCDs

Type A RCDs only detect AC residual currents, and need to be used with a DC residual current detector for EV charging.

DC Residual Current Detectors (DC Monitors)

The DC monitor will detect an unsafe DC residual current and cause activation of a device to disconnect the supply to the EV. The disconnecting device may be an RCD, a circuit breaker or a contactor.

The Western Automation Range of Residual Current Monitors

The Residual Current Monitor (RCM) range is intended for the detection of DC and/or AC residual currents in AC or DC installations. These RCMs are ideally suited for use with Electric Vehicle charging cables (Mode 2 Protection) and EV charging stations (Mode 3 Protection). Residual current detection options for IEC based requirements are 30mA AC or 6mA DC or both, and are 20mA AC & 6mA DC for UL requirements.

Mode 2
Mode 2

IEC 62752 In-cable control and protection device for mode 2 charging of electric road vehicles (IC-CPD).

Mode 3
Mode 3

IEC 62955 Residual Direct Current Monitoring Device to be used for Mode 3 charging of Electric Vehicle.

Residual Current Monitor Application

The Residual Current Monitor (RCM) module is connected in series with the AC supply to an EV and will provide an output if a DC current ≥ 6mA DC flows in the circuit. This output can be used to operate an RCD, a circuit breaker or a contactor to remove the supply to the EV.

Residual Current Monitior Advantages

  • Simple, compact, low cost
  • Can be integrated into charging stations
  • May be adapted for in-cable protection
  • Maximum conductor rating of 40A

RCM14 Features

  • Operates from a 12V DC supply
  • External test facility
  • Power ON LED
  • “Fault” signal output
  • For use with 1, 2 or 3 phase loads rated up to 40A/400V
  • ROHS compliant
  • Complies with the DC protection requirements of IEC62752 – Mode 2, IEC62752 – Mode 3, and UL2231
  • 3000A surge current withstand
  • 14mm aperture

RCM20

The RCM20 provides all of the features of the RCM14, but has a 20mm aperture which can accommodate larger conductors.

  • Operates from a 12V DC supply
  • External test facility
  • Power ON LED
  • “Fault” signal output
  • For use with 1, 2 or 3 phase loads rated up to 40A/400V
  • ROHS compliant
  • Complies with the DC protection requirements of
  • IEC62752
  • Mode 2, IEC62752, Mode 3 & UL2231
  • 3000A surge current withstand
  • 20mm aperture
rcm-20

RCM01

The RCM01 range of residual current monitors is intended for the detection of DC and/or AC residual currents in 50Hz/60Hz AC or DC installations (see model options below).

  • Operates from a 12V DC supply
  • External Test Facility
  • “Fault” signal output
  • For use with 1, 2 or 3 phase loads rated up to 100A/400V
  • ROHS compliant
  • Complies with the DC protection requirements of IEC62752

(Mode 2) & UL2231

  • 3000A Surge Current Withstand

Talk to Western Automation today to
discuss your EV charging protection requirements.

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