Under voltage and over voltage protector Noted: When you first connect the product, you have to wait about 1 minute, after the red light turn off, then the product work. The automatic recovery over voltage and under voltage protective device complies with modular design standards. the circuit boards of products adopt electronic components with reliable performance. when the power situation is unstable. It function be automatically activated. once the voltage eceeds the limited range of products, it automatically cut off so as to protect the safely of electrical equipment and persons. The device re-supply in 1 minute, when the power returns to normal.The green indicator display, when the power is normal supply. The red indicator display, when the power over voltage or under voltage. Installing: 35mm Din rail. Rated AC voltage 230V±10% and frequency 50Hz/60Hz Passing Ma Current:40A Ma. Loading power: 8.8KVA Over-voltage action cut-off value: 270VAC+/-5V Normal-voltage value: 175-270VAC Under-voltage action cut-off value: Less than 170VAC+/-5V Over voltage and under voltage cut-off: Less than 1s Electricity transmitting delay after cut-off: Less than 60s Self power consumption Less than 2W Electric machinery life=100000 times Dimension: 35L 70W 77Hmm Installing: 35mm Din rail Colour:White Material:plastic Package Contents: 1 Under voltage and over voltage protector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.