GIS shipping

[Power0020]

I wonder if the 220 kV or 400 kV GIS is shipped with SF6 filled in or just like Transformers? I heard before that some parts are pre-filled and others are filled at site.

I was thinking about the gas leakage that may occur during transportation and shipping but on other hand a huge amount of gas cylinders will be required at site for big GIS.

any clue?

 

[bacon4life]

My state has transportation rules that prevent transport of any high pressure vessels besides certified gas cylinders, so we have to reduce the pressure in SF6 circuit breakers to about 10% of normal pressure for transport.