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    • PC57.166/D3, Feb 2024 - UNAPPROVED DRAFT
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Full Description

Scope

This guide provides acceptance and maintenance criteria for insulating liquids used in transformers, tap changers, regulators and reactors.

Purpose

To assist the user of the equipment in evaluating insulating liquids: * As received from unused insulating liquid supplier prior to processing and/or filling into equipment. * Received in new equipment filled prior to energization. * In service-aged equipment. This guide also discusses the following related in insulating liquids: * Test methods and their significance * Methods of handling and storage * Mixtures of insulating liquids * Health and environmental care procedures * Re-processing, re-claiming and replacement This guide does not cover dissolved gas analysis of insulating liquids, which is covered by other IEEE Standard Guides.

Abstract

New IEEE Standard - Active - Draft. Recommendations are made regarding tests and evaluation procedures of insulating liquids; references are made to methods of reconditioning and reclaiming insulating liquids; the levels at which these methods become necessary. The intent is to assist the power equipment operator in evaluating the serviceability of liquid insulation received in equipment, as received from the supplier for filling new equipment at the installation site, and as processed into such equipment; and to assist the operator in maintaining the insulating liquid in serviceable condition. The insulating liquids covered are used in transformers, reactors, load tap changers, and voltage regulators