ASTM D3277-95(2001)e1
Standard Test Methods for Moisture Content of Oil-Impregnated Cellulosic Insulation

Standard No.

ASTM D3277-95(2001)e1

Release Date

1995

Published By

American Society for Testing and Materials (ASTM)

Status

Withdraw 2010-02

Latest

ASTM D3277-95(2001)e1

Scope

Moisture has an adverse effect on the dielectric strength, dielectric loss, dc resistivity, and aging characteristics of oil-impregnated cellulosic insulating materials.

When cellulosic insulation such as paper and pressboard are impregnated with and immersed in oil, there is an interchange of moisture between the cellulose and oil until they attain equilibrium with respect to their relative saturations with moisture.

Considerable care should be taken in using these test methods to measure the water content of dry (<0.5 %) paper and board. Contamination of material by water from the surroundings during sampling and handling may be both rapid and significant in the case of dry test specimens. This is an even greater concern with cellulose insulation prior to oil impregnation.

1.1 These test methods cover the determination of the weight percent of water in new or aged, oil-impregnated electrical insulation. These test methods depend on solvent extraction of the water at room temperature. The range from 0.1 to 7.0% water has been explored.

1.2 There are four test methods, A, B, C, and D. Methods A and B for thin paper and dense materials, respectively, are manual methods for solvent extraction of water from the specimens. Titration is used to determine the amount of water. Method C uses automatic titration to determine the amount of water. Method D is a direct automated method for extraction and detection of the water.

1.3 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 determine the applicability of regulatory limitations prior to use.

ASTM D3277-95(2001)e1 Referenced Document

• ASTM D1533 Standard Test Method for Water in Insulating Liquids by Coulometric Karl Fischer Titration*， 2024-04-19 Update

ASTM D3277-95(2001)e1 history

• 1995 ASTM D3277-95(2001)e1 Standard Test Methods for Moisture Content of Oil-Impregnated Cellulosic Insulation
• 1995 ASTM D3277-95e1 Standard Test Methods for Moisture Content of Oil-Impregnated Cellulosic Insulation
• 1995 ASTM D3277-95 Standard Test Methods for Moisture Content of Oil-Impregnated Cellulosic Insulation