METZ CONNECT USA Inc. Monitoring Relay Monitors 110292032215

The monitoring relay monitors the correct phase sequence L1-L2-L3 and complete failures of individual phase voltages. The phase voltages to be monitored are connected to the terminals L1-L2-L3; the terminals 11, 14 or 21, 24 of the relay output contacts are connected before the field coil of the motor relay. If the phase sequence is correct, the output relay is activated . In case of total failure of a phase, the output relay returns to its neutral position. A special supply voltage is not required for the monitoring relay. Only connect the device to N if the three phases to be monitored are connected to N over an electric circuit