Circuit breaker asymmetrical current

[MercedesLopez]

Hello, 

Could you please explain why circuit breaker current is asymmetrical?

Best regards

Mercedes

[Anonymous user · Accepted solution]

Hello Mercedes,

If you are talking about the asymmetrical fault current wave form during in a circuit breaker due to the DC  Component.

You are right, the fault current in a circuit breaker could be asymmetrical depending of the power factor of the circuit and when in the cycle (50hz sinusoid) the fault ignition take place. 

More information on the websites below.

https://myelectrical.com/notes/entryid/134/dc-component-of-asymmetrical-faults

http://www.electricalaxis.com/2020/11/what-is-importance-of-xr-ratio.html

[MercedesLopez]

Thanks @Anonymous user for quite clear explanations, and quite complementary provided websites: I bookmark them!

Best regards

Mercedes