1.1 This test method covers procedure for subjecting electrical insulating oils to oxidative ageing by:
Method A — with metal catalyst Method B — without metal catalyst.
1.2 This method is applicable to electrical insulating oils of petroleum origin as long as less than 10 percent of the oil evaporates during the ageing procedures. At present, it applies and is generally useful primarily in the evaluation and quality control of unused oils, either inhibited or uninhibited.
IS 12177-1987 history
1988IS 12177-1987 Method for testing the oxidative aging of electrical insulating petroleum using the open beaker method