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IEEE C57.166-2026

IEEE Guide for Acceptance and Maintenance of Insulating Liquids in Transformers and Related Equipment

STANDARD published on 15.9.2026

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The information about the standard:

Designation standards: IEEE C57.166-2026
Publication date standards: 15.9.2026
The number of pages: 84
Approximate weight : 283 g (0.62 lbs)
Country: International technical standard
Category: Technical standards IEEE

Annotation of standard text IEEE C57.166-2026 :

New IEEE Standard - Active.
Recommendations regarding tests and evaluation procedures of insulating liquids are made in this guide. References are made in this guide to methods of reconditioning and reclaiming insulating liquids and the levels at which these methods become necessary. Assisting 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 assisting the operator in maintaining the insulating liquid in serviceable condition are intended by this guide. Insulating liquids used in transformers, reactors, on-load tap changers, and step-voltage regulators are covered in this guide.

ISBN: 979-8-8557-3816-2, 979-8-8557-3817-9
Number of Pages: 84
Product Code: STD29078, STDPD29078
Keywords: ester, IEEE C57.166™, insulating liquids, liquids, maintenance, mineral oil, natural ester, on-load tap changer, reclaiming, reconditioning, silicone, synthetic ester, transformer
Category: Transformers