Minilec HLV D2 Phase Failure Relay operates when there is phase failure unbalance phase sequence under voltages over voltages in the circuit It has auto reset and fixed unbalance settings This Relay is equipped with 2 CO Output Contacts This Relay is suitable for monitoring 3 Ph System supply from MAINS amp used by motor load -AC amp R Chiller compressor motors AHU Fan Pump Motors Machinery using multiple small motors MAIN powers supply distribution panel board DG Set application UPS Submersible Pumps Hoist amp Crane Phase Failure Relay - Buy Minilec HLV D2 DIN Rail Mounted Voltage Sensing Phase Failure Relay with Under amp Over Voltage Setting Variable online at https www electrikals com product minilec-hlv-d2-din-rail-mounted-voltage-sensing-phase-failure-relay-with-under-over-voltage-setting-variable- id 25596