Transformer Temperature Gauge

read about temperature sensors...!!! you will get the idea.

Thanks,but i have no time to read, my time is too tight and i want clear and summarised answer for my question without any further excuses please.

Why do I suspect that response didn't come from the original "guest". It just reinforces the dangers of posting as guest.

It doesn't make any difference,they are pass-by Guests.

I don't think any of the "Guest" responses are from the original OP. Just the ramblings of a disgruntled would be engineer.

Leave for two days watching your wife and her boyfriend.

Is this a dry type transformer, or is it oil immersed?

Are you having trouble with the transformer overheating?

If a dry type transformer, put an RTD somewhere else on the transformer, like on a hot spot of the iron core, or on the outside of the winding. Then set an alarm or shutoff at some lower temperature than might indicate trouble with an RTD in the winding.

Ideally, you could monitor the temperature during the hottest parts of the year with this (jury rigged) RTD, then set a trip point slightly above that temperature. You'd also want to consider the loading when picking a setpoint.

For an oil immersed transformer, you could do something similar. If there is an unused tap into the tank near the top, you might insert a temperature sensor there--just make sure it doesn't project far enough inside to come anywhere close to the windings, especially the high temperature windings.

I presume you are asking what the temperature gauge in a transformer is measuring and it's the temperature of the surrounding dielectric; not the windings or coils. In oil-filled transformers, it's the top oil temperature and for dry types, the air or gas temperature.

Here is how it works:

You lay the temperature gauge under the transformer.

At night while you are asleep, the pixie fairies come from a far away land and sprinkle magic pixie dust on the temperature gauge.

When you get up the next morning look under the transformer. The temperature gauge will be gone and you will find candy in it's place.

If you find my explanation un-believable then try checking your course text book or Google the subject yourself to find the answer. Our time is also tight.

in a transformer u will see both oil and winding temperature , how they are getting winding temperature......................

The winding temperature is calculated using the oil temperature and a signal proportional to the load on the windings.