| commstech |
If i have a trans that has a pair secondary outputs 30V and the trans is rated 225VA. Assuming my requirement is only one of the 30V secondary; can i simply parallel the two secondaries and achieve better VA rating? Ok, if it does not improve VA, any harm will come of it?
Anyone plse advise. Thanks. |
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| AndrewT |
Hi,
carefully check that you find the 0v & 30v ends of both windings before you connect them.
If you connect the 0v to the other 30v then you end up with 60v into a short circuit.
I suggest you connect them in series first & check you have 60v into open circuit.
Get it right & you have twice the current capacity at the same voltage i.e. 30v 7.5a
Q how do you check series primaries are correct before you connect the mains?
regards Andrew T. |
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| commstech |
| quote: | Originally posted by AndrewT
Hi,
carefully check that you find the 0v & 30v ends of both windings before you connect them.
If you connect the 0v to the other 30v then you end up with 60v into a short circuit.
I suggest you connect them in series first & check you have 60v into open circuit.
Get it right & you have twice the current capacity at the same voltage i.e. 30v 7.5a
Q how do you check series primaries are correct before you connect the mains?
regards Andrew T. |
Hi, the winding diagram is given and wire leads are color coded, should have no problem. i have connected up in series and yes, the 60v is there.
ok, how do i connect them ?
Pair 1
-------
30V - red
0V- black
Pair 2
-------
30V - Orange
0V - Yellow
I would think RED to Orange and Black to Yellow. Am i correct? |
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| Gaucho |
| quote: |
I would think RED to Orange and Black to Yellow. Am i correct? |
It would certainly seem so. To be on the safe side hook-up just the red and the orange at first and then check to see that that there isn't any significant voltage between the black and yellow leads. |
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| AndrewT |
Hi,
if red/yellow gave 60v when blk/orange connected then common red & orange and common blk & yellow.
Unusual colours for secondaries? purple & grey are more common, red & blk are often primary but I suppose each manufacturer will have their standard. |
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