Further information for BTR Metz PFD3 E12 400VAC 2W 10mA 2We monitoring relay - 110292032230
The monitoring relay for monitoring the correct phase sequence L1-L2-L3 (clockwise rotation) and monitoring the individual phase voltages for total failure. The phase voltages to be monitored are connected to terminals L1-L2-L3, terminals 11, 14 or 21, 24 of the relay output contacts are connected in front of the excitation coil of the motor contactor. If the phase sequence is correct, the output relay switches on (green LED on). If a phase fails completely, the output relay returns to its rest position (green LED off). A special supply voltage for the monitoring relay is not required. The device must be connected to N. If the neutral conductor fails, the output relay returns to its rest position (green LED off).