Voltage Monitoring Relay, Under/Over Voltage, 1 Phase, 110-240V AC/DC

The AC/DC voltage monitoring relay with LCD display is a multifunctional monitoring and protection device. The relay is applied in supply voltage of DC 12V, AC/DC 24-48V or AC/DC 110V-240V to protect the equipment or devices from undervoltage and overvoltage in the applications like air compressors, electric motors, pumps, fans, air-conditioning system, blowers, elevators, cranes, refrigeration equipment, laser equipment, industrial control system, etc.

Features

• Powered by the measuring circuit
• Compatible with AC and DC supply
• LCD display and keypad afford precise digital setting
• Compact size in DIN rail mounting
• Adjustable overvoltage and undervoltage threshold
• Independent adjustable delay time for overvoltage, undervoltage
• Adjustable reset mode: automatic reset or manual reset
• Monitoring relay with 1 CO + 1 NC contacts
• Fault recording for the last 3 faults

Specification

Wiring Diagram

Note:
1. Relay contacts position shown in "Power-on" (Healthy) condition. If power is off or any fault occurs, the relay contacts will be opposite to the diagram.
2. For DC power, the polarities must be correctly connected. Otherwise, the relay doesn't work.

Details

Tips: Under/Over Voltage Monitoring Relay Function

The under/over voltage monitoring relay is used to automatically disconnect the circuit when the overvoltage and undervoltage in the line exceed the specified value and can automatically detect the line voltage, and it can automatically connect the circuit when the voltage in the line returns to normal, so as to protect our electricity safety.

The voltage monitoring relay is mainly used to protect the insulation of electrical equipment such as generators, transformers, vacuum switches, busbars, and motors from damage by overvoltage.

When the power supply line has overvoltage and under voltage, the voltage monitoring relay can quickly and safely cut off the circuit under continuous high-voltage impact to avoid the occurrence of accidents caused by abnormal voltage being sent to the terminal appliances. When the voltage returns to the normal value, the monitoring relay will automatically connect the circuit within the specified time to ensure that the terminal appliances are in normal operation under unattended duty.