1、Small size, rail mounted and no additional auxiliary power required. 2、Real-time monitoring of single-phase overvoltage and undervoltage faults. 3、Adjustable over and under voltage value for accurate control. 4、1 set of normally open normally closed contacts. 5、3 indicators indicate various working conditions. Features: Small size, rail mounted and no additional auxiliary power required. Real-time monitoring of single-phase overvoltage and undervoltage faults. Adjustable over and under voltage value for accurate control. 1 set of normally open normally closed contacts. 3 indicators indicate various working conditions. Specification: Rated Voltage: 220VAC, 50/60Hz Protection Function: Overvoltage (Adjustable), Undervoltage (Adjustable) Voltage Setting: ±5%~±20% Adjustable Display Mode: LED Indicates Working Status Contact Form: A Set Of Normally Open Normally Closed Contacts Contact Capacity: 3A AC250V (Resistive) Size:68 X 30 X 76mm / 2.68 X 1.18 X 2.99in Installation Method: 35mm Rail Mounted Or Device Type Protection Function: Overvoltage Undervoltage Package List: 1 x Protector Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.