Over and Under Voltage Protectors (MOV)

Power fluctuations and power quality issues can affect many electronic devices, especially if the voltage in the grid is too high or too low. An overvoltage and undervoltage protector (MOV) is an electronic component that filters out the effects of these voltage fluctuations. In this article, we will take an in-depth look at overvoltage and undervoltage protectors and describe their role and advantages in protecting electronic devices.

Main content

concept

An overvoltage and undervoltage protector is a component, also known as MOVs or TVS (Arrester tube). It is a resistor that contains a responsive circuit to detect and limit the potential damage of overvoltage and undervoltage to electronic devices. It usually consists of a set of metal oxide layers and electrode bodies, and has a high response speed.

effect

When the external power supply fluctuates or is overloaded, the voltage may exceed the design value of the electronic device, resulting in failure or equipment damage. An overvoltage protector (MOV) can protect the device by drawing current through it itself. Unlike ordinary resistors, MOV can respond to momentary overvoltage without damage. When the voltage reaches a certain level, the conductive particles in the metal oxide layer will form a "conduction channel" to absorb the excessive voltage; If the voltage returns to the expected level, it will reset automatically.

Similarly, an undervoltage protector (MOV) can also prevent damage to electronic devices caused by too low a voltage. When the voltage drops, MOVs will provide additional power to the device, allowing it to operate normally until the voltage returns to normal. If the protector is not used, the undervoltage will cause the equipment to burn out or signal failure, affecting the normal use of the equipment.

advantage

Overvoltage and undervoltage protectors (MOV) have many advantages. First, they can provide additional protection between the upper and lower limits of voltage to protect equipment from excessive or insufficient voltage damage. Second, the protector is able to quickly respond to voltage fluctuations and grid interference, thus effectively protecting the equipment. Finally, the protector has efficient and reliable working performance and can work normally for a long time under multiple voltage fluctuations.

CONCLUSION

In modern electronic equipment, overvoltage and undervoltage protectors (MOV) are very important and necessary components. They can effectively protect equipment from voltage fluctuations and grid interference to equipment damage and high maintenance costs. Therefore, when selecting electronic equipment, it is necessary to understand and properly install the protector to ensure the normal use of the equipment.

Extended reading

Which equipment in the factory is most dependent on EPS power supply?

EPS application scenario – Factory

What specific help does EPS system have for campus safety?

Global supply

Our products sell well all over the world, covering many countries and regions, through the global logistics network, to provide customers with convenient purchasing experience.

Rigorous quality

We adhere to the highest quality control standards to ensure every product meets industry regulations and customer expectations, earning trust through consistent excellence.

Excellent service

With a customer-centric approach, we provide prompt responses, professional support, and personalized services, aiming to deliver the best user experience and long-term value.