I just got a 1kva 40-0-40 Toroid from Avel. (Model = Y236953)
Normally they are fine but this guy wants to warm up to 45C with little or no load and may be rising.....
I used a infra-red temp gun over the windings got the readings.
Is that normal or should I ask for a replacement?
Thanks guys!
K-
Normally they are fine but this guy wants to warm up to 45C with little or no load and may be rising.....
I used a infra-red temp gun over the windings got the readings.
Is that normal or should I ask for a replacement?
Thanks guys!
K-
No load open secondary, bad tranny, go for a replacement, running hot a replacement would make you feel a lot more comfortable in the long run. Unless the Manufacturer SAYS it is supposed to run at 45 C open secondary. I can not see why it would really, not under normal design parameters, maybe a 3 to 5 C rise over ambient yeah, Then again is your ambient around 41 C ? If so then the tranny may be fine!
Harlan
Harlan
There are reasons actually that a tranny would get this warm
1. Shorts in the secondary windings, ie between layers, damaged insulation, etc.
2. shorted windings in the primary as well, same way.
3. A mistake in winding the transformer at the factory, we all have bad days and maybe the wire was supposed to be AWG14 and is AWG20??
4. A Bad core! I have seen where the laminations did not get a good oxide coating and the core although magnetically perfect, was a total failure due to eddy currents, and man did they get hot!, I was ready to start a new Induction welder with those.
So there are reasons all of which are most likely not in your design criteria, so I would say a replacement is best way to go.
Good luck too.
Harlan
1. Shorts in the secondary windings, ie between layers, damaged insulation, etc.
2. shorted windings in the primary as well, same way.
3. A mistake in winding the transformer at the factory, we all have bad days and maybe the wire was supposed to be AWG14 and is AWG20??
4. A Bad core! I have seen where the laminations did not get a good oxide coating and the core although magnetically perfect, was a total failure due to eddy currents, and man did they get hot!, I was ready to start a new Induction welder with those.
So there are reasons all of which are most likely not in your design criteria, so I would say a replacement is best way to go.
Good luck too.
Harlan
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