Min Clearance From Transformer To Building

Consult IS 2026 and the local building codes which may be more stringent than the IS.

Are you sure you only want 10.7m between your building and this:

Thanks for your reply. I found this in IEEE 979 where mentioned "where containment is provided in accordence with 8.1, other types of sub equipment should be no closer than 10.7m to n adjacent piece of mineral oil insulated equipments anticipated flame front or containment boundary"

Only 10.7m between his building and a busted jpeg? The horror!
Please re-post, or put up a link. I would really like to see what this was.

And there it is. Yikes.

What do you mean by the term "containment"? Catching the oil if there is a leak or preventing the oil from hitting a structure should the transformer go boom?

Having looked at the OP's previous posts I think he would be better employed well away from anything involving power.

From the evidence I saw the ensuing oil fire was so great light fittings on the exterior of a building were melted at over 20m away and the surrounding concrete apron was pockmarked where the burning boiling oil had landed.

This transformer was smaller than the one you are proposing but was at the end of a similar fault level.

Your building wants to be nowhere near a transformer like this. I assume we are talking blast protected building and not a portacabin ........

Also to consider is the EMF generated by the transformer which we are all told is safe.

It is measured from the oil containment pit. and I think you will still require a fire wall. It depends where you are and what your client requires for the site and also the fire regulations if you are in the USA. Check with your local fire dept as well as they will be involved somewhere along the line.. The space required is for fire fighting as well as preventing the spread of the fire to adjacent areas and buildings.

The standards are only guidelines of minimum requirements, not set distances and dependent on the area and catchment systems being used. Bunded to the Tfx only or drained to a catchment tank vie pipe works.

Correct IQ! However, sahababu71, see also NFPA 850 Recommended Practice for

Fire Protection for Electric Generating Plants and High Voltage Direct Current Converter Stations

ch.5.2.4 Outdoor Oil-Insulated Transformers.

I have not the last edition of IEEE 979.However in IEEE 979-2004 ch. 4.4 Transformer outdoor installations NFPA 850 is recommended.

NFPA 850 -2005 requires 50 ft Minimum (Line-of-Sight) Separation Without Firewall.

With a firewall you may reduce the distance.