1. Home
  2. Hobby Electronics Basics
  3. Transformer power usage
  4. Page 2

Transformer power usage

with no=20

happened to=20

I=20

off of=20

always=20

is a=20

even an=20

drained

100%

answer

assumption.

the

pointed

Oh man, John Fool really isn't helpful is he? He always can't find the = right answer, all he said he "What's the difference?" Gosh... =20

with no=20

Scott, the transformer is not supposed to draw power when there is no = load, but there is still a small amount of power loss through heat if = the primary is too short-circuited. That little transformer draws in = milliamp, you won't see it moves your power meter.

=20

Reply to
Richardson
Loading thread data ...

Update: Transformer did fail within a week of light use (20W). The (plastic) supports for the buses adjacent to the primary winding were reduced to a crater of black powder and soot. All nearby wiring had heat damage to the insulation, with the whites completely bare and crispy for the last inch to the bus. Whites seem to have melted from the inside.

Thank you all for your advice. I do understand now that an unloaded transformer does not consume considerable wattage. Minimal losses less than 5% are normal to typical transformers.

Time to buy another transformer. Thanks! Scott

Reply to
Scott

Please beware of how P. A. in Australia gets to be a Usenet irritant from Australia, possibly arguably 2nd-place to Auastralia's worst sub-troll who got a FAQ onto himself (only mildly-slightly out-of-date if over 10 years old), whose primary sub-troling name is "Rod Speed".

I sometimes wonder if P.A. and R.S. are both "mental patients" at the same psychiatric ward at some locality in Australia.

I invite either of these to exercize emotional maturity achiecving growth to extent of posting anything indicating significant growth of emotional maturity past the juvenile postings typical of both even so far in 2009.

Best Regards with Goog Hopes,

- Don Klipstein (Jr) ( snipped-for-privacy@misty.com)

Reply to
Don Klipstein

ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.