Under UK rules & regs, is there a requirement to bund fluid filled
transformers to contain any insulating fluid leakage? This will be a new
transformer installation and the fluid will be Midel. There are other
transformers on site and these are not bunded.
I don't know but I can share some thoughts. I see Wikipedia actually
hints 'yes' on your specific question
a short ways into the page, though I would have said, over here, no, I
do not see containment around transformers. Also, if I were to spec a
liquid filled padmount medium voltage transformer it would probably be
filled with vegetable oil and not harmful to the environment.
Vegetable oil? Doesn't that stuff go rancid? I would certainly not fill
a transformer with anything not designed for the job, doing so would
leave one wide open to liabilities.
So long as the transformer oil stays in the transformer and is properly
recovered if the unit is ever scrapped, I don't see there being much of
an environmental issue.
Yes, that's right, I would spec a transformer filled with extra virgin
olive oil off the supermarket shelf. Sure, the manufacturers complain
because it's no good for insulation or cooling and it's not fit for
use, and it catches fire, and no testing agency can approve it, and
the Owners don't like the fact that it's unsafe and fails the
electrical inspection and cannot be put into service. But it is
better for the environment if there happens to be a leak, so I have
given it long consideration and on balance, I fell that outweighs the
Actually, no. Of course the oil is designed for the job. They have
txf oil made from vegetable oil. I do not know whether Midel is one
Also, 'as long as it stays in the transformer' is the whole issue.
Things leak and spill. Things deteriorate. Things get damaged.
That's why containment exists at all.
I would consider bunding in all cases wgere oil containment is
required wether it be mineral oil midel or FR3.
I believe that you need to contain the volume plus 10%. But check with
the environment Agency