transformer mothball- keep in place for a few months

[PAP]

Hello All,

I'm trying to find transformer mothball ( keep in place ,not use for a few months) procedure, Could anyone suggest me the standard or procedure about that? My application is distribution transformer 1600kVA- 22kV/400V.

Thanks for every suggestion.
PAP

 

[Zogzog]

You need to keep the humidty out, A heater strip or even a light bulb will keep the internal temp higher than the outside. If you wrap it be sure to have a vent, but you will want to keep out nesting criters.

There are some procedures for this on the ABB site.

 

[SphincterBoy]

Connect shorts between primary and secondary phases, then connect to ground.

 

[dewone]

Be sure to place a nitrogen blanket on the unit. Also keeps out moisture with out a heat source. For an extended period of out of service. Drain oil, and blanket with nitrogen. SphincterBoy has the other precaution covered ground all bushings.

 

[DanDel]

Obviously, there are varying suggestions depending on whether you have a dry-type or liquid-filled transformer, as seen in the responses.