Why does my circuit breaker trip?

[Anonymous user]

Hello.

So I've purchased "Back-UPS Pro 1500" and here's my story.

Firstly I placed it under a dedicated circuit breaker (rated to allow up to 6 Amps), but I noticed that it tripped pretty much every single time after my UPS had been left off for a longer period (a night is long enough). It tripped even with no computers connected and only when powering up the UPS (meaning I could restart the circuit breaker and everything was smooth since then).
So yeah, I thought 6 Amps may be too pesky, therefore I got it replaced with 10 Amps (Hager B10 MB110) and... nothing has changed!
Then I borrowed a power meter (or whatever it's called in English) and today in the morning evaluated that tripping occurred within circuit containing less than 3 Amps.
It might also be worth mentioning that whole room is protected by another 16 Amps circuit breaker which has never tripped at all.

How should I properly choose a circuit breaker? Maybe you can even mention a few specific models (I'm not sure if this is a good idea since I expect many of you live in USA and I live in Europe)?

[BillP]

what type of breaker is it? is it a GFCI breaker?

http://nam-en.apc.com/app/answers/detail/a_id/1344

[Anonymous user · Accepted solution]

Well, I'm not too good at these things.
However, my country uses the three-wire system (phase wire, neutral wire, ground wire) and since this present circuit breaker makes use of phase wire only, I believe it is not GFCI (assuming it should have something to do with ground wire otherwise) 😄