Skip to main content

All Questions

Filter by
Sorted by
Tagged with
1 vote
1 answer
99 views

Why do 3-phase selective circuit breakers appear as separate (not joined) ones?

I'm looking at 3-phase selective circuit breakers like this: Unlike a typical 3-phase circuit breaker, this selective breaker appears to be essentially 3 separate breakers all put together. Strangely ...
Dmitri Nesteruk's user avatar
5 votes
2 answers
1k views

Are there breakers which can be triggered by an external signal and have to be reset by hand?

Essentially, I would like to connect a breaker to a smoke detector and have it trigger when it activates. Are there any breakers that can be triggered by a separate external signal and which have to ...
Reewen's user avatar
  • 85
0 votes
1 answer
1k views

Can I replace a 32 A switch with a 32 A MCB?

A switch for a water heater in my apartment is broken (image attached). It is an "Anchor Roma 32 Amp 1-Way Switch with indicator". Can I replace it with this or this switch? Would the installation ...
nosh's user avatar
  • 103
1 vote
2 answers
2k views

How does the arc extinguisher work in a miniature circuit breaker?

In a miniature circuit breaker, as shown below, the distance between open contacts is much less than the distance between metal bars in the arc extinguisher part (the gap gets progressively longer ...
Microsoft Linux TM's user avatar
3 votes
2 answers
6k views

What factors play into choosing type of MCB (Circuit Breaker) which is B16 vs C16 vs D16?

Found these discussions and Q&As online around this and am trying to determine how/ when one would decide to choose which way to go? http://www.theiet.org/forums/forum/messageview.cfm?catid=205&...
Alex S's user avatar
  • 147
0 votes
2 answers
1k views

Using motor circuit breaker buttons to start/stop motor

I want to add some protection to an ac 3/4 hp motor. I did some research and found that I could use one of these motor circuit breakers: My question is, if I use one of these, can I use the on/off ...
user135908's user avatar
0 votes
1 answer
381 views

Circuit breaker not tripping

I am powering a bunch of LEDs with a 60A/5V power supply. For extra protection, I wired a 50A circuit breaker between the supply and the LED array: http://www.digikey.com/product-search/en?mpart=W23-...
user3390169's user avatar