Overvoltage protection ensures safety by preventing damage from excessive voltage levels. Undervoltage protection safeguards equipment from low voltage conditions that can cause malfunction. Overcurrent protection prevents overheating and potential fire hazards by limiting current flow. Three-phase voltage imbalance protection maintains system stability by detecting and correcting voltage discrepancies. Phase sequence protection and additional features ensure proper operation and reliability in various electrical conditions. This product offers comprehensive electrical protection, including overvoltage, undervoltage, and overcurrent safeguards. It is designed to maintain system stability with three-phase voltage imbalance protection and phase sequence protection. The device also includes voltage and current manual error correction, power-on delay, protection trip delay, and recovery delay features to enhance operational reliability. Color: White Material: plastic Specification: 63A Package Contents: 1*Three Phase Adjustable Over and Under 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.