What can be used for insulating transformer windings?

[Brad K]

I have a transformer which output is around 40kV. What can I use to insulate the secondary from the primary windings?

Do I need specifically Fish Paper or Nomex paper? Is there anything else I can use?
I have been told that I can use fiberglass tape, but can only find mesh fiberglass tape for home sheetrock repair.


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[guru]

It may be difficult to get!
I would suggest that you get an old automobile ignition coil, take-it apart and use what is in there, use the same construction technique.

Hope this properly answers your question

Guru

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[Bill M]

Look up Tesla coil in a search engine, you should find plans for building one. You could use an automobile ignition coil or a flyback from a TV or CRT monitor (be careful, the CRT might need to be discharged).

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[Rorschach]

go to any auto body supply store and get woven fiberglass cloth like that used for auto body repair. cut to shape.

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[Technobuff]

Fibreglass insulation materials and tapes are available, check where from with a motor rewinder or such. I have some that was acquired from a major engineering hardware store.
Many old style car ignition coils are oil filled, to aid insulation. Don't pull one apart!
Also, many modern electrical transformers, like those found in switchmode power supplies where insulation is critical to avoid mains voltages on the low voltage outputs, a special plastic tape of which I don't know the name, is commonly used. You might enquire about that. It's like a PVC tape, but NOT electricians' tape. Usually yellow in colour.
It is much thinner than fibreglass tape.

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