Microprocessor technology provideshighly accurate and repeatable protection. Built-in LCD and keypad afford a precisediqital setting. Compact modular 43mm housing. Adjustable over-and undervoltage,phase unbalance threshold. Independent adjustable delay time forovervoltage, undervoltage phase unbalance. Adjustable reset method automatic resetor manual reset. 1 NO&INC contacts. Failure recording with last 3 faults. Protective Functions Applications: Phase Loss(Failure) Pase Sequence(Reversal) Phase Unbalance(Asymmetry) Undervoltage Overvoltage Applications: Pumps, Fans, Refrigeration Unit, Blowers, Motors, Compressors, Lifts, Elevators, Crane, Mining excavators and conveyors. Specifications: Rated voltage: 380V 50-60Hz Operating range: 300-490VAC Theory:Voltage relay Contact Load:Low Power Model Number:TOMPD-8S Protect Feature:Sealed Power Source:AC Usage:General Purpose Colour:White Material:PC Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 1 x Voltage relay