1、Providing over voltage protection and under voltage protection to guarantee safe operation of home appliance. 2、Equipped with a LCD display screen, which adds more convenience to data reading as well as setting adjustment. 3、Adjustable over-voltage protection value, over-voltage recovery value, over-voltage protection action time, under-voltage protection value. 4、Adjustable undervoltage recovery value, undervoltage protection action time, overcurrent protection, overcurrent protection action time, resistive (malignant load) protection current, the resistive (malignant load) protection action time. 5、The failure recovery delay time is adjustable, and the power‑on delay time is adjustable. You can choose fault query or restore factory settings to reset. Item Type: Over Under Voltage Protection Device Product Material: ABS Model: SVP-915B Rated Voltage 230VAC 50/60Hz Rated Current 1-63A (default 63A) Overvoltage Protection Value Range 221V-300V-OFF Adjustable (default 280V) Overvoltage Recovery Voltage Adjustment Range 221V-299V (default 250V) Overvoltage Protection Action Time 0.1 Seconds - 10 Seconds (default value 0.1 seconds) Undervoltage Protection Value Range 150V-219V-OFF Adjustable (default 160V) Undervoltage Recovery Voltage Adjustment Range 151V-219V (default 180V) Under Voltage Protection Action Time 0.1 Seconds - 10 Seconds (default value 0.2 seconds) Over Current Adjustment Range 1-63A (default 63A) Overcurrent Action Range 0.1 Second - 255 Seconds (default value 5 seconds) Resistive (Malignant Load) Protection Current 0.5-5A (default 5A), any current value within the range of 1-63A can be customized. Resistive (Malignant Load) Action Time 1 Second - 5 Seconds (default value 5 seconds) Failure Recovery Delay Time 2 Seconds - 512 Seconds (default 60 seconds) Power-On Delay Turn-On Time 2 Seconds - 255 Seconds (default value 2 seconds) Power Consumption ≤2W Electrical Machinery Life ≥4000 Times Dimension（Approx.） 81 x 36 x 60mm / 3.2 x 1.4 x 2.4in Installation Method DIN Rail Working Environment Temperature: +40℃~-25℃, Humidity: <90%, Altitude: no more than 2000metres. 1 x Over Under Voltage Protection Device 1 x User Manual