Feature: 1. The monitoring protector can display voltage, current and power, with over‑under‑voltage and over‑current protection. 2. Overvoltage and overcurrent protection value, recovery value, protection action time can be adjusted. 3. Circuit failure recovery delay time and power‑on delay turn‑on time can be adjusted. 4. With the functions of resetting method selection, fault query, restoring factory settings, temporary battery clearing and cycle countdown, etc. 5. Use ABS material shell, is heat‑resistant and wear‑resistant, not easy to age after long‑term use. Specification: Item Type: Monitoring Protector Material: ABS Model: SVP-977 Rated Voltage 230VAC 50/60Hz Rated Current 1-80A adjustable (default is 63A) Overvoltage Protection Range 221V-300V-OFF adjustable (default is 280V) Overvoltage Recovery Voltage Adjustment Range 220V-299V (default is 250V) Overvoltage Protection Action Time 0.1-10s (default value is 0.1s) Undervoltage Protection Range 219V-150V-OFF adjustable (default is 160V) Undervoltage Recovery Voltage Adjustment Range 151V-220V (default value is 180V) Under Voltage Protection Action Time 0.1-10s (default value is 0.1s) Over Current Adjustment Range 1-80A (default value is 63A) Overcurrent Operating Range 0.1-512s (default value is 5.0s) Failure Recovery Delay Time 2-512s (default value is 60s) Power-on Delay Turn-on Time 2-255s (default value is 2s) Power Consumption ≤2W Electrical Machinery Life ≥4000 times Size Approx. 81 x 36 x 60mm / 3.2 x 1.4 x 2.4in Installation Method DIN rail Working Temperature -25-+40℃ Working Humidity <90% Altitude No more than 2000meter / 6561.7ft . Package List: 1 x Monitoring Protector1 x English User Manual Note: 1. The line conductor should meet the relevant current standard value, and the load current cannot be greater than the maximum protection current value of the protector.2. The neutral wire N cannot be connected wrongly and must be firm. The neutral wire N of this protector is directly connected without disconnection function.3. After the product is connected to the power supply, do not touch the live parts to avoid electric shock.4. This protector has no isolation and short‑circuit protection functions. Please install a miniature circuit breaker at the front of the protector to achieve isolation and short‑circuit protection. Please disconnect the front‑level circuit breaker switch when repairing the circuit. If the miniature circuit breaker is not used for protection, the short‑circuit current cannot be interrupted when there is a short‑circuit fault at the input or output of the protector.5. Because the protector has a self‑reset function, after the protector is protected from overcurrent and disconnected, immediately remove the load electrical appliances and check the circuit lines. Otherwise, the protector will frequently switch on the load electrical appliances, which will eventually cause a long time delay. Frequent turn‑on and turn‑off damage the electrical appliances and the protector itself.6. Please pay attention! When the undervoltage breaking time is greater than 0.3 seconds, the protector will not open after a power failure. (Single‑chip computer will not work after power off for 0.3 seconds)7. After the overcurrent exceeds 5 times within the specified time, the protector will not automatically restore the power supply after being locked. You must manually press the "SET" to unlock to restore the power supply. This can effectively protect the frequent opening and closing caused by the overcurrent being not released in time.