China OEM Single Phase Voltage Protection Relay Factory

The working principle of the overvoltage and undervoltage protector is to monitor the voltage in the line. When the voltage exceeds the set overvoltage action voltage value or is lower than the set undervoltage action voltage value, the protector will quickly and reliably cut off the circuit to protect the safety of electrical appliances. When the voltage returns to normal, the protector can automatically delay the power on and resume power supply, and all functions are automatically implemented.

Product Type

Type01 With Lock Series

Type02 Without Lock Series

Type03 High Voltage Series

Product Panel

Product Features

Production Function
It has overvoltage and undervoltage protection functions, which can effectively prevent equipment damage caused by too high or too low voltage.
Stability
Adopting embedded system design, it is small in size, light in weight, strong in impact and earthquake resistance, high in reliability, long in life and easy to install.

Security
It has flame retardant properties. The insulating material has flame retardant properties. The insulation resistance between each insert and the casing is greater than 300MΩ. The withstand voltage between each insert and the casing is greater than 3000V/AC, ensuring safe operation in harsh environments.

Product Function Diagram

The single-phase voltage protection relay has over- and under-voltage protection. When the voltage in the line is too high or too low, it can automatically cut off the load to prevent load burning or other safety accidents. At the same time, it automatically monitors the line voltage environment and can automatically restart the load when the voltage parameters in the line return to normal.

Over+Under Voltage

Overt Voltage Protection

When the grid voltage exceeds the set value, the relay will activate the protection function, cut off the power supply or sound an alarm. Action threshold and action time can be set according to actual needs

Under Voltage Protection

When the grid voltage is lower than the set value, the relay will activate the protection function, cut off the power supply or sound an alarm. Similarly, the action threshold and action time can be set according to actual needs.

Product Parameters

Product Wiring Diagram

With Lock Series

Without Lock Series

High Voltage Series

Action principle diagram

Product Size Chart

Application Areas

Industrial AutomationIn

industrial production, motors and CNC machine tools are common power equipment. The voltage protection relay can be installed in the power supply circuit of the motor to monitor the voltage status of the motor in real time. When the motor and CNC machine tool malfunction due to abnormal voltage, the relay can quickly cut off the power supply to prevent the motor from overheating and damage.

Motor + CNC Machine Tool

Household Appliances

In household appliances, such as electric water heaters, air conditioners, televisions, etc., voltage protection relays can be installed in the power supply circuits of the appliances to monitor the voltage status of the appliances in real time. When an electrical appliance fails due to abnormal voltage, the relay can cut off the power supply in time to prevent damage to the electrical appliance.

Medical Equipment

In the medical field, single-phase overvoltage and undervoltage protection relays are mainly used to protect equipment that requires extremely high voltage stability to ensure their safe operation and patient safety. Such as treatment and surgical equipment, laboratory and scientific research equipment, etc.

Ultrasound machine + dialysis machine