Oil Filled Transformers Clearence
Oil Filled Transformers Clearence
(OP)
Hi,
I have 3 transformers, oil filled, pad-mounted, 2 of them 25kV/480, 2500KVA and one 25kv//4160, 5000KVA. Can anyone help me to find out what will be the minimum clearance distance between them without using a blast wall?
I have 3 transformers, oil filled, pad-mounted, 2 of them 25kV/480, 2500KVA and one 25kv//4160, 5000KVA. Can anyone help me to find out what will be the minimum clearance distance between them without using a blast wall?






RE: Oil Filled Transformers Clearence
This forum is read by engineers from all over the world. There are probably a hundred different codes that MIGHT apply.
David Castor
www.cvoes.com
RE: Oil Filled Transformers Clearence
RE: Oil Filled Transformers Clearence
There may be some requirement for distance from the building wall depending on the fire rating of the wall.
The NEC does not worry much about things that are outside.
As for NFPA, that is going to depend on the type of facility. If it's a hospital or wastewater treatment plant, you may need separation or a firewall. If it's a Walmart, probably not.
Local fire marshall will have the last word (actually, the insurance underwriter may have the last word in some cases).
David Castor
www.cvoes.com
RE: Oil Filled Transformers Clearence
There are too many variables involved to be advising here.
Rafiq Bulsara
http://www.srengineersct.com
RE: Oil Filled Transformers Clearence
RE: Oil Filled Transformers Clearence
Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.
RE: Oil Filled Transformers Clearence
However, you must also consider the facility as well. A fire on a transformer often means there is an oil spill which will spread, so you will likely be required to have some sort of containment for the oil.
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If it is broken, fix it. If it isn't broken, I'll soon fix that.
RE: Oil Filled Transformers Clearence
RE: Oil Filled Transformers Clearence
RE: Oil Filled Transformers Clearence
Oil containment is generally not actually a legal requirement in the US in most locations. The owner can choose to not put in oil containment and deal with the consequences of a clean up after a spill.
David Castor
www.cvoes.com
RE: Oil Filled Transformers Clearence
RE: Oil Filled Transformers Clearence
There was such an incident last year in CT, which took out an entire hospital, when one the three transformers caught fire and took down the other two with it. Not sure there were any blast walls between them. I believe they were all in a utility vault.
Rafiq Bulsara
http://www.srengineersct.com
RE: Oil Filled Transformers Clearence
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If it is broken, fix it. If it isn't broken, I'll soon fix that.
RE: Oil Filled Transformers Clearence
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If it is broken, fix it. If it isn't broken, I'll soon fix that.
RE: Oil Filled Transformers Clearence