Feature 1 STVP series automatic reset over-voltage under-voltage multi-function protector is a monitoring and auxiliary protection device instrument suitable for three-phase four-wire power system or electrical equipment 2 When the line has overvoltage, undervoltage, or overcurrent status, this product can instantly cut off the power supply to protect the electrical equipment from being damaged; when the line voltage returns to normal, the protector can automatically turn on the power supply normally 3 This protector integrates overvoltage protection, undervoltage protection, overcurrent protection, threephase current (voltage) unbalance protection, phase sequence protection (phase dislocation protection), and phasebreak protection in one 4 The product has the function of fault inquiry, voltmeter and ammeter, and the function of restoring factory settings 5 Adjustable voltage protector come with complete functions, stable performance and easy operationItem Type: Adjustable Voltage ProtectorMaterial: PlasticModel: STVP-932Rated Voltage Three-Phase Four-Wire: 230V/400VAC 50/60HzCurrent 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%-OFFPhase 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: LCDFault Indication: Segment characterSampling Method: AC sampling of phase line to neutral line resistance partial pressureGrounding System: TT, TN-S, TN-C-SInstallation Method: Rail installationElectrical Isolation Strength: >2000VAC, pulse 2.5KV 1.2/50SWorking Environment: Temperature -20~50, Humidity85%, 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 Package List1 x Adjustable Voltage Protector1 x User Manual