ECN Forum Forums General Topics of the Trade Non-US Electrical Systems & Trades Main Switch or Circuit Breaker?

The type E circuit breaker is a bit different from standard MCB's: It will trip in a much narrower range than type B or C, making it more selective. Type E trips between 1.05 - 1.2 times rated current, compared to 1.13 - 1.45 times for types B and C.

Maybe this performance will filter down to new MCB's in a few years.

See this PDF from ABB:

http://tinyurl.com/32hx2z