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Old 25th March 2002, 05:40 PM   #1
FBJ is offline FBJ  United States
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Question Encapsulated PWR Transformers?

I have search older threads but couldn't find any info.

Can anyone point me to a source where I can buy a empty thermoplastic round case for power transformer encapsulation?
Also where I might buy the resin to pour in the case.
Thanks
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Old 25th March 2002, 11:37 PM   #2
Lenin is offline Lenin  United Kingdom
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Default Try just about any toroidal manufacturer

Most toridal manufacturers offer a range of mounting options, from metal screening cans, through to simple (and ubiqutous) neoprene washers and large dished metal washer. (with thermoplastic casings in between)

Why dont you get in touch with a US manufacturer and but what you need? They won't need more that the external dimensions of your existing toroid, I don't suppose.

Give it a go.

Good luck comrade
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Old 25th March 2002, 11:41 PM   #3
Lenin is offline Lenin  United Kingdom
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Default Whoops!

FBJ,

I forgot - resin. These are generally available from suppliers like Farnell and RS.

They usually come as a 2 part kit. (You know the drill, mix the contents of the 2 packets, panic as the mixture starts to go of faster than you expected, get fingers covered with the goo, wish that you'd worn gloves, etc, etc)
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Old 25th March 2002, 11:55 PM   #4
Lenin is offline Lenin  United Kingdom
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Default Try just about any toroidal manufacturer

Most toridal manufacturers offer a range of mounting options, from metal screening cans, through to simple (and ubiqutous) neoprene washers and large dished metal washer. (with thermoplastic casings in between)

Why dont you get in touch with a US manufacturer and but what you need? They won't need more that the external dimensions of your existing toroid, I don't suppose.

Give it a go.

Good luck comrade
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Old 26th March 2002, 07:31 AM   #5
FBJ is offline FBJ  United States
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I forgot to include that the transformers I have are not potted. And I have looked at several transformer manufacting web sites and didn't seen anything about selling the thermoplastic round case or resin separately.
But surfing the net I located a place in California called www.plasmetex.com that can custom made thermoplastic round cases. Haven't called about prices yet. And I located a TAA article in 1993, 4, about potting resins and sources.
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Old 26th March 2002, 10:11 AM   #6
Alex M is offline Alex M  United Kingdom
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I have successfully used Maplin's potting compound
- go to http://www.maplin.co.uk/ and search for
PX700.

Alex
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Old 27th March 2002, 07:16 AM   #7
FBJ is offline FBJ  United States
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Thanks I"ll do that.
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Old 27th March 2002, 06:30 PM   #8
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Default Potting Transformer

Try a toy store, looking for a nice plastic bucket, grocery store... food container, home store plant container. Just some ideas, have used them all with success. Potting compound comes from home supply or automotive body shop supply..... polyester resin.

Cyclotronguy
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Old 27th March 2002, 06:33 PM   #9
jam is offline jam  United States
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Cyclotronguy,

....Bedpans?

Jam
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Old 27th March 2002, 08:06 PM   #10
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Only for failed product, Jam.

Cyclotronguy
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