Microcontroller designed MInilec S2 VMR 2 Relay comes with SMD Technology Operated in Phase Failure Unbalance Phase Sequence under voltage Over Voltage conditions Have Auto reset Fixed Unbalance setting Fixed UV OV settings and 2 CO output relay Contacts 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 S2 VMR 2 DIN Rail Mounted Voltage Sensing Phase Failure Relay with Fixed Under amp Over Setting https www electrikals com product minilec-s2-vmr-2-din-rail-mounted-voltage-sensing-phase-failure-relay-with-fixed-under-over-voltage-setting id 25598