While necessary capacitor bank switching can cause electrical equipment failure.

What is a transient?

An electrical transient is a temporary excess of voltage and/or...

What causes electrical transients?

The simple act of turning on (or off) a light, motor, copy machine or any other ...

Should I cover the main or the branch panel? Should I cover both?

Cover both and consider that a recommended minimum of two levels of protection is ...

What is let-through voltage?

Transient suppression voltage or let-through voltage is defined in UL 1449

How do you protect large motors?

We protect a large motor just like any other electrical device or system. First, we conduct a survey to determine the ...