Adjustable Voltage Protector 3-Phase LCD Multifunctional Self-Resetting STVP-932 230v 400VAC(63A ) Item Type: Adjustable Voltage Protector Material: Plastic Model: STVP-932 Rated Voltage Three-Phase Four-Wire: 230V/400VAC 50/60Hz Current Rating: 50A, 63A, 80A(optional) Overvoltage Protection Value Range: 221V-300V-OFF (default value 280V) Overvoltage Recovery Value Range: 220V-299V (default value 250V) Overvoltage Protection Action Time is Adjustable: 0.1 Seconds-10 seconds (default value is 0.2 seconds) Undervoltage Protection Value Range: 219V-150V-OFF (default value 160V) Undervoltage Recovery Value Range: 220V-151V (default value 180V) Under Voltage Protection Action Time is Adjustable: 0.1 Seconds-10 seconds (default value 0.2 seconds) Three-Phase Voltage Unbalance Protection Value Range: 10%-50%-OFF Phase Voltage Unbalance Protection Action Time: 0.1 seconds-10 seconds (default value 1.0 second) Power-On Delay Time: 2-255 Seconds (default value is 2 seconds) Failure Recovery Delay Time: 2-512 Seconds (default value is 60 seconds) Display Mode: LCD Fault Indication: Segment character Sampling Method: AC sampling of phase line to neutral line resistance partial pressure Grounding System: TT, TN-S, TN-C-S Installation Method: Rail installation Electrical Isolation Strength: >2000VAC, pulse 2.5KV 1.2/50μS Working Environment: Temperature -20℃~50℃, Humidity＜85%, Altitude: No more than 2000meterSize: Approx. 72 x 80mm / 2.8 x 3.1in, 65mm / 2.6in, 43mm / 1.7in, 45mm / 1.8in, 35mm / 1.4in