Residual current monitoring module RDC104-4 is used in combination with W15BS series measuring current transformers. Where DC or AC fault currents are likely to occur, A Type A RCD must be installed for DC fault current monitoring of EV AC charging systems. Rated voltage Un is 250 V and rated current (charge current)In = 1 x 48 A/3 x 32 A. RDC104-4 is suitable for integration into charging unit Mode 3(AC) for use as an RDC-M module, in accordance with standard IEC 62955.