PPB01CM48 PPB01 voltage monitoring relay, triple-phase, 380 - 480 V AC

The DPB01 and PPB01 are three-phase mains monitoring relays. They can be operated on both the 3P and 3P+N mains and detect the phase failure and the correct phase sequence (not available on N-terminated versions) as well as possible overvoltages and undervoltages. The supply voltage for the monitoring relays is supplied via the monitored mains. An alarm time lag of up to 30 seconds can be set for the overvoltage/undervoltage alarms.