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Ground short in ac/dc power supply

F

fisher

Jan 1, 1970
0
Hi.
I need help to know how can I detection failure (short) betwwen gound
to one of power supply input ?
This when I work with two phase 208vac
I need cheap solution.

Thanks
Arie.
 
M

mpm

Jan 1, 1970
0
fisher said:
I need help to know how can I detection failure (short) betwwen gound
to one of power supply input ?
This when I work with two phase 208vac
I need cheap solution.


Answer: A fuse, perhaps??

I know... that's not terribly helpful.
I just couldn't help myself... Sorry.

Maybe a CT?. You could check the current (developed voltage) across
one of those snap-on current transformers. And determine a trip point
to represent a grounded condition. Not sure that's the cheapest
solution though.

-mpm
 
S

scada

Jan 1, 1970
0
fisher said:
Hi.
I need help to know how can I detection failure (short) betwwen gound
to one of power supply input ?
This when I work with two phase 208vac
I need cheap solution.

Thanks
Arie.

You could use a GFI circuit breaker. They will sense an imbalance of current
between the two phases. If the imbalance is off by 5ma (I believe that is
the value) or greater, the breaker will trip.
 
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