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Sunday, December 22, 2013

Transformer Varnish Impregnation



Transformer Varnish Impregnation

Our power transformers all go through transformer varnish impregnation process. Such step is required to ensure the transformer winding are thoroughly sealed by varnish to strengthen the insulation strength, to prevent oxidation for long life, and to avoid rattling during operation.
We have separate impregnation processes for our power transformers – normal soaking, or vacuum chamber soaking processes. Our standard power transformers will be soaked overnight, where as our high end power transformers will be soaked in vacuum chamber to totally draw out the air contained in the windings and thoroughly impregnate the varnish to the windings. 

Varnish impregnation
Vacuumed varnish impregnation
You can see the difference before and after the windings are vacuumed. Picture above shows the already wound bobbin being soaked in our special concoction of varnish. After soaking for 1 day, not much air bubbles are seen. Picture below shows the air bubbles being drawn out after it is vacuum pumped. Soaking for 1 day is good, but vacuum pumped is excellent! The process is more complicated but for quality and peace of mind, we feel that it is something of a must.

Now, do you think it is necessary to pay the premium for high end power transformers? The answer is clear. It's all worth it.

J&K Audio Design
22/12/2013


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* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.  
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Level 3: depends on type, size and complexity. Email us for details.

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* Finished amplifiers, DACs, audio gadgets, upgrades and repairs - this is not our core business and we do it out of passion. We do not have fixed models, fixed price and we customize for each individuals. The sky is limit of creativity.

* Our product lines are always improving and increasing. If you do not see what you want, contact us!

* Please email for volume discounts, distributor and OEM pricing.

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