Remote test modules, Z-FW series. Only suitable for recloser set Z-FW-LP/MO and Z-FW-LPD/MO. External test module with test resistor for RCDs by rated residual current - adapted design, "external" test button function according to regulations. For remote testing with remote switching device Z-FW-LP. By interrupting contact, no dangerous voltage carry-over into the consumer installation during the remote disconnection process due to integrated interrupting contact K1-K2. Can also be used as remote tripping module for residual current circuit breakers series PXF.