Electrical bushing gas sampling apparatus and method
AssigneeGeneral Electric Company
InventorArnold M. Perras
Life of this patent
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Abstract
A sealable membrane is inserted within the filler plug receptacle of a high voltage bushing for providing access to the gas space above the dielectric oil used within the bushing. Gas sampling is achieved by inserting the needle of a hypodermic syringe through the membrane and withdrawing a quantity of gas to be sampled. The sealable properties of the membrane allow a plurality of samples to be taken without destroying the gas-tight seal.
Claims10
An adapter for providing gas sampling facility to an electrical bushing comprising:
- a first sealable membrane seated in the fill plug receptacle of an electrical bushing for providing a gastight seal to said bushing;
- a first plug member having external threads for threaded engagement in the fill plug receptacle to retain said first membrane therein and an internally threaded bore terminating in a reduced diameter central passage;
- a second sealable membrane seated in said threaded bore of said first plug member;
- and
- a second plug member having external threads for threaded engagement in said threaded bore of said first plug member to retain said second membrane therein and a central passage aligned with said central passage of said first plug member to accommodate the insertion of a syringe needle through said first and second membranes.
An electrical bushing comprising:
- a pair of first and second electrodes separated by means of a porcelain-skirted body section for providing electrical insulation between said first and second electrodes;
- an oil-fill plug receptacle within said bushing;
- a sealable membrane within said receptacle for providing a gastight seal to said bushing;
- and
- a plug member having a passage therethrough for insertion within said receptacle to retain said membrane within said receptacle.
A method for adapting an electrical bushing to provide gas sampling facility comprising the steps of:
- inserting a sealable membrane within an oil-fill inlet within an electrical bushing;
- and
- inserting at least one plug having a passage extending through the cross section of said plug for retaining said membrane within said inlet, said passage defining means for receiving a hypodermic needle.
Dependencies are inferred from the claim text.