50/60 Hz Single Phase Voltage Monitoring Relay DIN Rail Mounting For Compressors

When the line voltage is reduced to the critical voltage, the action of the protection device is called undervoltage protection. Its task is mainly to prevent the device from being burned due to overload.

Due to short-circuit faults and other reasons, the line voltage will greatly reduce or even disappear within a short time. It will cause damage to lines and electrical equipment. For example, if the motor is worn down or blocked, an overcurrent of several times the rated current will be generated and the motor will be burned out. When the voltage recovers, the self-start of a large number of motors will cause the voltage of the motor to drop drastically and cause damage.

The voltage that causes the motor to wear out is called the critical voltage. When the line voltage is reduced to the critical voltage, the action of protecting the electrical equipment is called undervoltage protection. Its task is mainly to prevent the equipment from being burned due to overload. When the voltage of the circuit is lower than the threshold voltage, the protective device is called the loss of voltage protection. Its main task is to prevent the motor from starting.

Overvoltage protection is a type of protection that disconnects or reduces the voltage of a controlled device when the protected line voltage exceeds a predetermined maximum value.

Overvoltage protection, is a type of protection that disconnects the power supply or reduces the voltage of the controlled device when the voltage exceeds a predetermined maximum value. There are many overvoltage protectors that come into being, some of which are housed inside the equipment and some are installed on the power supply side. With the protection of overvoltage protectors, we are more secure when using electrical equipment.

The under voltage protector is a multi-function three-phase three-wire power system or three-phase power equipment monitoring and protection equipment. Sets three-phase voltage display, over-voltage protection, under-voltage protection, phase loss protection (phase protection), three-phase voltage imbalance protection, phase sequence protection (wrong phase protection) in one. It can be used to monitor important parameters (voltage, phase sequence, phase loss, and phase balance) in three-phase power supply system. It can send alarm signals in time to abnormal conditions that may endanger the safe and reliable operation of power systems and equipment. The system can be properly handled before the machine equipment is more damaged, so that the machine equipment and system can obtain the maximum degree of protection, improve the effectiveness of the machine, equipment and system, and reduce maintenance costs due to three-phase system failures. Maintenance time.

♦ Features

-- Compact modular size-- Single-phase monitoring of over- and undervoltage-- Adjustable over- and undervoltage threshold-- Adjustable trip time-- Powered by the measuring circuit-- 2 C/O contact-- 3 LEDs for status indication

♦ Protective Functions

-- Overvoltage

-- Undervoltage

♦ Typical Applications

• Pumps • Fans

• Blowers • Motors

• Compressors

♦ Approvals

• CE • CCC

♦ Technical data