What is a circuit breaker and how it works?

[BillP]

As title.
Can you explain me what is the circuit breaker I have on the SmartUPS please?

When it kicks in?

Thanks

[BillP · Accepted solution]

Hi,

Please review How Stuff Works for an explanation of how a circuit breaker works 

http://electronics.howstuffworks.com/circuit-breaker.htm

The circuit breaker built into a Smart-UPS works the same as a home circuit breaker. 

You may also like this youtube video How a circuit breaker works. https://www.youtube.com/watch?v=GSh0f94JwaA