3 pole CB
3 pole CB
(OP)
in what situation do we use three pole CB for DC?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: 3 pole CB
Bill
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"Why not the best?"
Jimmy Carter
RE: 3 pole CB
RE: 3 pole CB
Keith Cress
kcress - http://www.flaminsystems.com
RE: 3 pole CB
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If it is broken, fix it. If it isn't broken, I'll soon fix that.
RE: 3 pole CB
In higher ratings, the 3rd pole comes handy for the reasons mentioned above. More importantly no special breaker has to be manufactured, it is basically an AC breaker tested and listed for DC use. Most of 3P breakers are listed in certain wiring configuraiton showing which poles will be seriesed.
See for example:
http://ec
RE: 3 pole CB
but i m still confused that why dc require much greater contact separtion?how can u achive by connecting CB contacts in series?
RE: 3 pole CB
RE: 3 pole CB
We use Cutler Hammer brand MCCBs, that specficly lists the series connection configuration to increase the interrupt rating.
These MCCBs are used as the EPO shunt tripped disconnect in the battery feed path in our customer 48V DC power plants..