The Omron three-phase asymmetry and phase-sequence phase-loss relay K8AK-PA ideal for 3-phase voltage asymmetry monitoring for industrial facilities and equipment. Switch setting for 3-phase 3-wire or 3-phase 4-wire power supply. Greater resistance to inverter noise One SPDT output relay, 5 A at 250 VAC (resistive load) World-wide power specifications supported by one unit (switchable) Relay status can be monitored using LED indicator