What Is a Voltage Protector?

Undervoltage protector is a multifunctional three-phase three-wire power system or a monitoring and protection instrument for three-phase electrical equipment. Set three-phase voltage display, over-voltage protection, under-voltage protection, phase loss protection (phase failure protection), three-phase voltage imbalance protection, phase sequence protection (out-of-phase protection) in one. It can be used to monitor important parameters (voltage, phase sequence, phase loss, phase balance) in the three-phase power supply system, and can issue alarm signals in time for abnormal conditions that may endanger the power system and equipment's safe and reliable operation The system can properly handle the machinery and equipment before it suffers greater damage, so as to maximize the protection of the machinery and equipment, improve the effectiveness of the machinery, equipment, and systems, reduce the maintenance costs caused by the failure of the three-phase system, and Maintenance time. Under voltage protectors (also known as three-phase power monitors, phase sequence protectors, over and under voltage protectors, etc.) are mainly used for AC 50 / 60Hz, rated voltage below 660V, industrial three-phase 100V, 220V, 380V (400V), Various fault detection at voltage levels of 440V (460V), 660V, etc., providing relay protection for three-phase input power supply with too high voltage, too low voltage, phase failure, out-of-phase (reverse phase sequence), three-phase voltage imbalance, etc. , Can be widely used in power distribution cabinets, power distribution boxes, electrical control boxes, power electronic devices, telecommunications and telecommunications room power supplies, etc., is an indispensable protection product to maintain the normal working voltage of equipment during the operation of industrial equipment.