The RCMP20-01 Series is a Residual Direct Current Monitoring module (RDC-M-module) that monitors ground-fault currents, residual currents or leakage currents in single-phase or multiple-phase installations. The RCMP20-01 Series is suitable for integration into Mode 3 electric vehicle charging, according to IEC 62955. Fault currents in AC and DC may occur in EV charging stations. Common Type A RCDs do not detect DC currents and this type of fault current can blind the protection device, leaving the user exposed to possibility of electrical shock. It is required to install RCMP20-01 Series as a DC fault sensor in Mode 3 charging stations to work in combination with a Type A RCD.
Mode 3
Permanently connected AC electric vehicle charging stations are considered Mode 3 charging, according to IEC 61851-1 and
IEC 60364-7-722. The RCMP20-01 Series monitors the residual direct current that type A RCD protection does not detect.
Function
The RCMP20-01 Series is continuously monitoring DC residual currents. When fault current exceeds the threshold values, the
device sends a trip signal. The module, when coupled with an appropriate switching device, will meet the requirements of an RDC-M-module.