Transformer pressure relief
Transformer pressure relief
(OP)
We are installing an 1800kVA 11kV transformer bellow deck in a concrete floating structure. The transformer room is force ventillated to provide cooling. In the event of an internal fault causing the pressure relief device to lift (8 p.s.i), would there be an increase in room pressure?
Does anybody have any experience regarding the possible effect of change in room pressure during this type of event?
Does anybody have any experience regarding the possible effect of change in room pressure during this type of event?






RE: Transformer pressure relief
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If we learn from our mistakes I'm getting a great education!
RE: Transformer pressure relief
RE: Transformer pressure relief
RE: Transformer pressure relief
An unusual design I hear you all say!!
RE: Transformer pressure relief
You are right to be concerned about HVAC ducting bursting but frankly you should be looking the integrity of the room itself if there is not free ventilation through a large capacity duct to allow rapid depressurisation in the event of a fault.
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If we learn from our mistakes I'm getting a great education!
RE: Transformer pressure relief
RE: Transformer pressure relief
It is my understanding that the largest rate of gas production during a fault happens in the first few cycles. This can rupture the tank with a violent force which even the pressure relief valve may not be able to handle. In this case, the oil may no longer be contained within the transformer and may be all over your room and on fire.
Perhaps a better solution is to install a rupture disk system? Check Transformer Protector Co (www.transproco.com) for information about this. We installed one of these TPC systems on a 129 MVA GSU transformer as a fire protection system. If an ounce of prevention is worth a pound of cure, this might be your best option.
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If it is broken, fix it. If it isn't broken, I'll soon fix that.
RE: Transformer pressure relief
Keith Cress
kcress - http://www.flaminsystems.com
RE: Transformer pressure relief
RE: Transformer pressure relief