"mm" wrote in message
...

But I was asking this, not just to fix this transformer, but in
general: How come I often see written a value like 45va, instead of 45
watts? I've noticed it on these plug-in transformers expecially.

Because the transformer can only deliver 45 VA not 45 Watts. If your load is
totally reactive there will be 0 watts but there could still be 45 VA of
load. If the transformer could deliver 45 watts no matter what it could
handle 20 A of reactive current - it can't.








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