Phase monitoring
The
monitoring relay for monitoring the correct phase sequence L1-L2-L3 (clockwise
rotation) and monitoring the individual phase voltages for total failure. 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 only be connected to N if the three phases to be monitored are
connected to N via a circuit (e.g. temperature monitoring or similar).