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, the 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. Integrate over‑voltage protection, under‑voltage protection, over‑current protection, three‑phase current (voltage) unbalance protection, phase sequence protection (phase dislocation protection), and phase‑break protection in one 4. The product possess the function of fault inquiry, voltmeter and ammeter, and the function of restoring factory settings 5. LCD voltage protector come with complete functions, stable performance and easy operation Specification: Item Type: Adjustable Voltage Protector Material: Plastic Model: STVP-936 Current Rating: 1-80A adjustable(default 80A) / 1-63A adjustable(default 63A) / 1-50A adjustable(default 50A) Overvoltage Protection Value Range: 221V-300V-OFF (default value 280V) 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)Overcurrent Protection Action Time: 1 Second - 512 seconds (default value is 5 seconds)Three-Phase Voltage Unbalance Protection Value Range: 5%-90%-OFF(default value is 25%) Power-On Delay Time: 2-255 Seconds (default value is 2 seconds) Failure Recovery Delay Time: 2-512 Seconds (default value is 60 seconds)Power Consumption: ≤3VADisplay 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 vertical installation Electrical Isolation Strength: >2000VAC, pulse 2.5KV 1.2/50μS Working Environment: Temperature -20℃~50℃, Humidity＜85%, Altitude: No more than 2000meter Size: Approx. 70 x 95mm / 2.8 x 3.7in, 65mm / 2.6in, 43mm / 1.7in, 45mm / 1.8in, 35mm / 1.4in . Package List: 1 x Adjustable Voltage Protector1 x User Manual