Electronics > Beginners

Single Pole or 1P + N circuit breakers

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soldar:
John Ward discusses and explains his very issue:


Monkeh:
TL;DW. I know earthing systems.

An MCB operates on exactly one fault condition. Please propose a scenario in which it can operate and opening the neutral conductor would be beneficial. If this scenario can be resolved by the use of an RCD (re: TT systems.), or it involves manual operation of the MCB, I refer you to everything I've already said.

soldar:
Yeah, there are none so blind as those who will not see.

Anyway, it is well explained in that video. For anyone who would like to see.

Monkeh:

--- Quote from: soldar on March 30, 2019, 06:53:26 pm ---Yeah, there are none so blind as those who will not see.

Anyway, it is well explained in that video. For anyone who would like to see.

--- End quote ---

So explain it.

I could go watch 18 minutes of that but I do have other things to watch, so if you'd like to point to the timestamp where he explains the exact fault scenario an MCB sensing only on line would operate in and benefit from opening the neutral, that'd be great.

stevelup:
I agree 100% with you.

The sole purpose of an MCB is to deal with an overcurrent scenario. If it opens on overcurrent it has done its job. End of story.

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