2005 Edition, May 1, 2005
Standard Practice for Combustible Gases in the Gas Space of Electrical Apparatus Using Portable Meters
Includes all amendments and changes through Reapproval Notice , 2011
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Description / Abstract:
This field practice covers the detection and estimation of
combustible gases in the gas blanket above the oil or in gas
detector relays in transformers using portable instruments. It is
applicable only with transformers using mineral oil as the
dielectric fluid. Gases dissolved in the oil and noncombustible
gases are not determined. A method of calibrating the instruments
with a known gas mixture is included.