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ASTM-D7150:2005 Edition

ASTM-D7150:2005 Edition

$35.75

D7150-05 Standard Test Method for the Determination of Gassing Characteristics of Insulating Liquids Under Thermal Stress at Low Temperature

Published By Publication Date Number of Pages
ASTM 2005 4
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1.1 This test method describes the procedures to determine the low temperature (120C) gassing characteristics of insulating liquids specifically and without the influence of other electrical apparatus materials or electrical stresses. This test method was primarily designed for insulating mineral oil. It can be applied to other insulating liquids in which dissolved gas-in-oil analysis (Test Method D 3612) is commonly performed.

1.2 This test method is particularly suited for detection of the phenomenon sometimes known as ‘stray gassing’ and is also referred to in CIGRE TF11 B39.

1.3 This test method is performed on transformer insulating liquids to determine the propensity of the oil to produce certain gases such as hydrogen and hydrocarbons at low temperatures.

1.4 This test method details two procedures:

1.5 Method A describes the procedure for determining the gassing characteristics of a new, unused insulating liquid, as received, at 120C for 164 h.

1.6 Method B describes the procedure for processing the insulating liquid through an attapulgite clay column to remove organic contaminants and other reactive groups that may influence the gassing behavior of an insulating liquid, which is suspected of being contaminated. This procedure applies to both new and used insulating liquids.

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
Summary of Test Method
2 Significance and Use
Reagents and Materials
Method A
3 Method B
Report
Precision and Bias
Keywords
FIG. 1
4 FIG. 2

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