WUV-1-120H

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The WUV-1-120H is a type of Protection Relays & Systems. This article will explore the application field and working principle in detail.

The WUV-1-120H is a self-powered under voltage protection relay that is mainly applied to protect three-phase motors from having low voltage damages. It can be used in both single-phase and three-phase systems, as well as for both AC and DC applications, with a rated operating voltage of 50 to 440 volts AC and 20 to 220 volts DC. This system utilizes a long-term averaging methodology to regulate protection parameters during normal operation.

The WUV-1-120H can be used in a variety of safety-related applications such as preventing sudden shut-down of the motor in case of a power interruption and also to confirm the integrity of the power supply on suspicious circuits. Additionally, this device can be applied efficiently in the restart after a power outage, as it reacts quickly to restore the correct voltage in order to ensure the safety and operational continuity of equipment. Moreover, due to its small size and low power consumption, the WUV-1-120H relay is often used in restricted space areas where space is at a premium.

The working principle of the WUV-1-120H protection relay relies on the comparision between the value of the reference voltage to the actual measured input voltage. When there is a drop in the input voltage below the rated level, the relay will be triggered. After the undervoltage protection is triggered, the amplifier circuit will activate the undervoltage warning light and then the relay will send a signal to the power controller, so that it can dispense the power at the desired level. This way, the motor will not be subjected to any further damage.

In addition to its application in motor protection, the WUV-1-120H feature two additional methods of protection: the timer protection and the phase sequence protection. In order to protect the motor from overvoltage damages, the timer protection will activate when the reference voltage is exceeded and will immediately cut the power supply. The phase sequence protection is also incredibly useful for the prevention of electrical problems caused by phase inversion failures.

The WUV-1-120H is a highly functional under/over voltage protection relay for a variety of applications. By taking advantage of precise protection parameters, this system can be used in order to effectively protect the motor and other related systems from any possible damages caused by power interruption and low/high voltage. In addition, the two additional protection methods offered by this device make it a reliable and safe protection system.

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