Test your knowledge

What is transient overvoltage

• A quick burst of voltage that last for few microseconds

• A short, sudden spike in current that last for hundredsof miliseconds

• A short burst of voltage that is similar to the normal supplied voltage

Closing and opening of circuit breaker can cause overvoltages

• False

• True

• Not sure

Common cause of transient overvoltages

• Low voltage supply

• phase to ground fault

• overloading a circuit

• All of them

Which method do you think can be used to prevent overvoltages? 

• Multistage transformer

• Bank capacitor

• Harmonics filter

Lightning is type of overvoltage

• Yes

• No