Storage of NEW power transformer
Storage of NEW power transformer
(OP)
We have to store new transformers for at least 2 to 3 years.
I understand that filling with oil is the best option. Do we need to mount all radiators and conservatory tank if we want to fill the oil in (this would be preferable as per manufacturer)?
What do you think about keeping it filled with nitrogen?
How to keep radiators, piping and conservatory tank dry if not assembled on the casing?
Would the dry transformer core damage the impregnation of the paper and cause possible cracks?
Thanks in advance for help
thread238-262209: Power Transformer Storage
I understand that filling with oil is the best option. Do we need to mount all radiators and conservatory tank if we want to fill the oil in (this would be preferable as per manufacturer)?
What do you think about keeping it filled with nitrogen?
How to keep radiators, piping and conservatory tank dry if not assembled on the casing?
Would the dry transformer core damage the impregnation of the paper and cause possible cracks?
Thanks in advance for help
thread238-262209: Power Transformer Storage






RE: Storage of NEW power transformer
Regards
Marmite
RE: Storage of NEW power transformer
RE: Storage of NEW power transformer
RE: Storage of NEW power transformer
I am planning to get the power for control cabinet. This is workable.
I do not want to risk the health of the transformers (2 are in question) but also would like to save on unnecessary cost.
All your comments are helping my case.
Did you have any experience moving large transformers 250MVA 242/18kV with radiators on if storage is on the same property as the final location (no road restrictions)?
RE: Storage of NEW power transformer
There are some situations where this is done (large generating stations), however from what I've seen, there is also built in rails for moving units around. I've seen this in some German influenced areas and also the US. I believe this is a long ago design (1970's?)
I have seen several large GSU units in the US stored long term without radiators or bushings installed. That seems to be what is done now.
Installing the radiators and adding oil is a fairly simple task in transformer assembly. I would not feel good about trying to move a unit with the radiators & bushings installed, considering the risks involved with an accident and environmental cleanup involved. You may want to check with rigging / heavy hauling companies that specialize in this work and find their comfort level. I'm not an expert in this area, but simple things like how the unit is balanced (equal radiators, etc), do lifting provisions exist without interfering with radiators...
Additionally, you have not mentioned the conditions for travel and the distance you have to move the units. If it were paved concrete roads that is one thing. If it is a wet, muddy switchyard in the springtime, that is another.
RE: Storage of NEW power transformer
The issue is that we need to decide about temporary storage, moving to final storage and then moving to the final position.
At this moment everything is unknown.
RE: Storage of NEW power transformer
Bill
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"Why not the best?"
Jimmy Carter
RE: Storage of NEW power transformer
In this case only temporary storage is involved. Oil filling with conservator and breather will be more than enough.Another way is tank alone is filled with oil leaving approximately 10% of tank height with dry air and monitor the air for positive pressure.This is the normal storage practice followed at site.
RE: Storage of NEW power transformer
There does happen to be concrete rails in this picture, however they were part of the original 1950's design and not large enough to accommodate this transformer. The rest of the move was across the gravel yard, then up over the oil containment berm. The cribbing system can be set up on most types of surface. When a similar transformer was scheduled for delivery during the wet season, the mover indicated it could still be done by first laying down large steel plates over the mud.
On 115/12.5 kv distribution transformers we have done temporary storage without radiators.
RE: Storage of NEW power transformer
RE: Storage of NEW power transformer
RE: Storage of NEW power transformer