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| amp is 2008-03-30, 9:25 am |
| I have a 3 section 3 phase MCB rated at 25A.
Is this 25A total or 25A on each phase?
TIA.
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| Palindrome 2008-03-30, 9:25 am |
| amp is wrote:
> I have a 3 section 3 phase MCB rated at 25A.
> Is this 25A total or 25A on each phase?
>
Consult the manufacturer's specification for the product.
Never take any "advice" with safety implications off a usenet group -
especially this one.
Oops, I have just given some advice with safety implications....
--
Sue
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| amp is 2008-03-30, 1:25 pm |
| UK by the way
"amp is" <thisisnotmy@address.com> wrote in message
news:fsnnfp$71r$1@aioe.org...
>I have a 3 section 3 phase MCB rated at 25A.
> Is this 25A total or 25A on each phase?
>
> TIA.
>
| |
| James Sweet 2008-03-30, 1:25 pm |
|
"amp is" <thisisnotmy@address.com> wrote in message
news:fsogo7$4ad$1@aioe.org...
> UK by the way
>
>
>
> "amp is" <thisisnotmy@address.com> wrote in message
> news:fsnnfp$71r$1@aioe.org...
>
>
It's almost certainly 25A each phase. I've never seen it rated any other
way.
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| amp is 2008-03-30, 5:25 pm |
| Thanks James.
"amp is" <thisisnotmy@address.com> wrote in message
news:fsnnfp$71r$1@aioe.org...
>I have a 3 section 3 phase MCB rated at 25A.
> Is this 25A total or 25A on each phase?
>
> TIA.
>
| |
| phil-news-nospam@ipal.net 2008-03-30, 5:25 pm |
| On Sun, 30 Mar 2008 11:44:57 +0200 amp is <thisisnotmy@address.com> wrote:
| I have a 3 section 3 phase MCB rated at 25A.
| Is this 25A total or 25A on each phase?
Some models have 1, 2, and 3 pole variations. The 3 pole ones can still
be used on 3 separate single phase circuits. So that would seem to imply
that it's the specified amperage for each phase, sensed individually (so
one of them going over-current would trip them all together ... not the
sum of currents exceeding some rating or sum of ratings).
--
|---------------------------------------/----------------------------------|
| Phil Howard KA9WGN (ka9wgn.ham.org) / Do not send to the address below |
| first name lower case at ipal.net / spamtrap-2008-03-30-1621@ipal.net |
|------------------------------------/-------------------------------------|
| |
| Palindrome 2008-03-30, 5:25 pm |
| phil-news-nospam@ipal.net wrote:
> On Sun, 30 Mar 2008 11:44:57 +0200 amp is <thisisnotmy@address.com> wrote:
>
> | I have a 3 section 3 phase MCB rated at 25A.
> | Is this 25A total or 25A on each phase?
>
> Some models have 1, 2, and 3 pole variations. The 3 pole ones can still
> be used on 3 separate single phase circuits. So that would seem to imply
> that it's the specified amperage for each phase, sensed individually (so
> one of them going over-current would trip them all together ... not the
> sum of currents exceeding some rating or sum of ratings).
>
As James wrote, it is almost certainly a rating per contact pair. I've
never encountered one that hasn't been.
But if I was in any doubt, I'd turn to the manufacturer's data sheet.
Three phase at ~25A could cause a great deal of damage.
--
Sue
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| Ryan Evans 2008-03-30, 5:25 pm |
| Each. Draw 25+ amps on any phase = trip
RE
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