1There are multiple groups of rated voltages available, voltage input range is from 176V to 552V. 2Professional protection against overvoltage, undervoltage, and unbalanced voltage. 3The voltage relay is compatible with threephase threewire and threephase fourwire input. 4There are five LED lights indicating working status, you can know the working state of the relay. 5The voltage protector has standard modular structure, use guide rail installation. Condition:100% Brand New Item Type: VoltageRelay Material: Plastic Color: As Pictures Shown Model: JVRD-P01 Monitoring Circuit: L1, L2, L3 or L1, L2, L3, N Rated Voltage (Line Voltage): 220...460VAC, 50/60Hz Voltage Input Range: 176-552V Overvoltage and Undervoltage Adjustment Range: 2-20% Action Delay Range: 0.1-10s (Overvoltage, Undervoltage, Unbalance Delay) Voltage Unbalance Value: 8% Phase Sequence Delay of Open Phase: 100ms Voltage Measurement Accuracy: 1% Knob Setting Accuracy: 5% Reset Method: Automatic Reset LED Indication: Open Phase, Wrong Phase, Under Voltage, over Voltage, Normal 5 Lights (Unbalanced and Open Phase Share 1) Contact Form: 2 Open and 2 Closed Contact Capacity: 6A 250VAC/24VDC (Resistive) Use Category: AC15, DC13 Protection Level: P20 Mechanical Life: 1 x 10 Electrical Life: 1 x 10 Working Temperature: -20-+55 Installation Method: 35mm/1.4in Rail Size(H x W x D): Approx. 79 x 23 x 79 mm/3.11 x 0.93 x 3.11in Typical Applications: Motors, Fans, Pumps, Air Compressors, Cranes, Cranes, Elevators, Cranes, Elevators, Machine Tools, Central Air Conditioning, Refrigeration Equipment, Laser Equipment, Industrial Control Systems 1 xVoltageRelay1 x Instruction