AC to DC Converter

You are posting in the forum provided, free of charge, by a company who's source of revenue is the connection of people who need thing with people who provide things.

To whit:

http://search.globalspec.com/ProductFinder/FindProducts?query=115VDC%20power%20supply

I am agree with my professional friend "kvsridhar", It is better to switch to 230vac source to power spring charging motor of 250 w. It is economical and easy to implement.

DC is used on some breaker operator applications, because it can be stored in a battery so that the breaker can operate after a power failure (or before restoration, as the case may warrant). One should not endeavor to second guess a previously made decision like that unless one is prepared to accept total engineering responsibility for the outcome of an unforeseen event.

That's why Licensed Professional Engineers make the big bucks...

Good point.

However, in defence of what i said...

1. The closing system of a CB is not critical (especially when there is no power), and there is a manual override anyway, if one wants to close it.

2. It is the shunt trip (or similar voltmetric releases) which must have reliable power under severe voltage dip due to a bolted short-circuit. These are battery fed in a good set up.

3. A motor of wrong voltage could well be the result of a purchase department snafu .... quite common in India

Nevertheless, engr1, there is lot of wisdom in what JRaef has said here, so please study your situation and let us know. Was a battery back-up originally specified ?

Thanks all