Work Item
ASTM WK68133

New Test Method for Standard Test Method for Oxidation Induction Time of Natural and Synthetic Ester Electrical Insulating Liquids by Differential Scanning Calorimetry (DSC)

1. Scope

This test method describes the procedures for determining the oxidation induction time (OIT) of natural and synthetic ester insulating liquids using oxygen and isothermal conditions. This test method is applicable to natural and synthetic ester liquids used as dielectric coolants in electrical equipment such as transformers and switchgear. This test method is applicable for the evaluation of the oxidation stability of natural and synthetic ester liquids for quality control, quality assurance or research and development purposes.


Differential Scanning Calorimetry (DSC)


Presently, ASTM D27 does not have a standard test method to measure the oxidation stability of ester liquids to be considered for use as an electrical insulating liquid in transformers, reactors and switchgear. This standard was in the process of being developed as WK21616,, but lapsed due to excess time to complete the development of the standard. This is the reinstatement preparation.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: D27.06

Committee: D27

Staff Manager: Kelly Paul

Work Item Status

Date Initiated: 05-10-2019

Technical Contact: Kevin Rapp

Item: 000