Surge Protector Circuit Using Mov

However metal oxide varistors are available in a wide range of varistor voltages from about 10 volts to over 1 000 volts ac or dc so selection can be helped by knowing the supply voltage.

Surge protector circuit using mov.

In general mov selection for the electrical protection of circuits from power supply transients and spikes is often little more than an educated guess. Metal oxide varistor basics. A metal oxide varistor or mov is an electronic component that protects equipment from voltage surges in a power line such as from lightning strikes. Home home electrical circuits ac 220v 120v mains surge protector circuits the values of the components i intend to use is.

Transient protector using inductors and mov. When exposed to high transient voltage the mov clamps voltage to a safe level. Varistors can absorb part of a surge. About the mov metal oxide varistors.

Excessive voltage triggers the mov into action. Attached is the surge protection circuit we have decided for our group research thesis. Mov is the most commonly used type of varistor. A word of caution.

Using this option typically requires the mov to have a nominal turn on threshold that is above 1500 v rms which has the effect of potentially limiting the usefulness of the mov surge protection. Simple and inexpensive the mov absorbs the energy in a surge preventing it from damaging other devices in a circuit. This is just one part of our project which is to have a built in sure protection for wall outlets using 2 diodes with cathodes connected to each other and movs. How to test a mov metal oxide varistor surge protector device.

They are fit for providing voltage surge protection for a wide variety of applications and include the c iii itmov la tmov ra ultramov ultramov25s and za series. Question regarding surge prevention in electronic ballast. The rationale is that if the likelihood of surge damage to the mov is low the risk of fire is adequately addressed. A metal oxide varistor absorbs potentially destructive energy and dissipates it as heat thus protecting vulnerable circuit components and preventing system damage.

This design is not great it s slow to act depending on a relay it will take many ms to switch off at current max relay current and a 250v mov in 120v installation won t help much either. This is a surge protector.