The purpose of this guide is to assist the transformer operator in evaluating and processing Less Flammable Hydrocarbon (LFH) insulating liquids received in new transformers, as received from the insulating liquid manufacturer for filling transformers, and as processed into such equipment. It also assists the operator in maintaining the insulating liquid in serviceable condition. This guide, therefore, recommends standard tests and evaluation procedures, methods of reconditioning and reclaiming LFH insulating liquids, and the analysis results at which these processes become necessary. It will also address the routines for restoring resistance to oxidation, where desired, by the addition of inhibitors.This amendment will update Tables 2 (Section 5.2) and 3 (section 6) of the Guide, which discuss acceptable values for new LFH fluid received by the customer.
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