3 phase 100kva Transformer regulations.

[mcm991]

Does anyone know the politics of installing a 3 phase 100kva transformer?

I'm a little sick and tired of the prices that I have been quoted for purchasing one of these beasts. Everything from 120k to 350k or even more.

Truth is, I can easily import the same transformer myself for 60k. There is no problem getting it into the country.

My question is .......

Will I be allowed to use it?

I've been told various truth by various experts ranging from 'No' to 'yes, but it must first be tested and certified in Bangkok' to sure, why not.

Even my local PEA guys don't seem to be able to give me a straight answer .... and I'm just wondering if I'm about to give myself a giant headache by attempting this.

Anyone actually done this succesfully or know rhe rules?

Thanks.

mcm

[stoneyboy]

I've been told various truth by various experts ranging from 'No' to 'yes, but it must first be tested and certified in Bangkok' to sure, why not.

That bit made me laugh.

[KhunBENQ]

I've been told various truth by various experts ranging from 'No' to 'yes, but it must first be tested and certified in Bangkok' to sure, why not.

That bit made me laugh.

And that will cost more than the price difference

The answer as such sounds plausible.

An electricity provider has its certified equipment (preferred suppliers) before the meter.

So if you come with "something" imported they will require an individual certification.

Just curious: what input voltage (kV) does it have?

I don't know what voltages PEA uses in residential areas on the high voltage side.

[SantiSuk]

I got similar wild quotes in my Isaan locale, some official, some obvious 'a bit on the side' quotes by PEA staff, which I was not inclined to take up on principle. My wife insisted on (me) paying 60,000 baht for a transformer with some guy who turned up to help the garden designer build our garden.

He promptly disappeared with the readies and the garden designer said "nothing to do wiv me mate". I kicked myself at limiting my due diligence to "are you absolutely sure this guy is reliable teelak?"

Needless to say I don't let the wife make big spending commitments any longer and sheepish-she does not mind that

Eventually we settled for getting a second supply put into the property. Achieved most of what we wanted (volume of supply was previously insufficient to properly fire more than 3 aircons at any one time) and cost only 7k baht, which I calculate as having been recovered from lower combined bills over 26 months - both supplies get the lower tranche rates for the small first bite. That route worked well for us as we already had a separate input line/fuse-box for the pool area, including pool equipment, water tower/well/pumps and a couple of bedrooms.

I didn't ask whether it was an official job - by then I had gone native and lost my principles!

Edited August 16, 2015 by SantiSuk

[Deke]

You could order a transformer directly from one of the local manufacturers; Tira Thai is a good one, and then get someone to install it for you. A 100 kVA transformer is small enough to fit in a pickup so transportation shouldn't be much of an issue.

In most places for PEA the specs would be 22 kV primary, 400/230 V secondary and Dyn11 for the vector group.

[mcm991]

I've been told various truth by various experts ranging from 'No' to 'yes, but it must first be tested and certified in Bangkok' to sure, why not.

That bit made me laugh.

And that will cost more than the price difference

The answer as such sounds plausible.

An electricity provider has its certified equipment (preferred suppliers) before the meter.

So if you come with "something" imported they will require an individual certification.

Just curious: what input voltage (kV) does it have?

I don't know what voltages PEA uses in residential areas on the high voltage side.

Input voltage is 22kV.

Output in this case is 3 phase 380V.

It's not worth the headache IMO, to try to be too clever. I think I'll bite the bullet and do what I'm told, for once.