Provides perfectly stable output even under severe conditions of unbalanced voltage conditions. Ideal to protectthe electrical and electronic equipments from high and low voltage. Technical SpecificationsInput Voltage Range : 300 460V 340 480V 360 460V AC 3 PhOutput Voltage (3 Ph) : 415V ACSystem : Unbalanced 4 wire: R Y B NConnections : StarOperating Frequency : 47 to 53 HzOutput Voltage Adjustable : 380 to 415V AC in 3 Ph