INTRODUCTION Certain essential properties of insulating oil@ used in transformers and circuit breaking de-vices@ must be retained in service if the oil is to reliably perform its multiple role of electrical insulating@ arc quenching and heat-transfer agent. It must have adequate dielectric strength to withstand the electrical stresses imposed in service. It must retain a sufficiently low viscosity so that its ability to circulate and transfer heat is not impaired. It must pour readily at low temperatures@ and have high flash point and fire point for safety. Its dielectric losses should not become excessive. It should not be allowed to become so deteriorated or contaminated that it adversely affects other materials in the apparatus@ nor should deterioration products sludge it suffi-ciently to impair its circulation through cooling ducts. This guide attempts to assist the power equip?ment operator in his efforts to maintain his oil in serviceable condition. It recommends and standardizes oil test and evaluation procedures@ methods of reconditioning and reclaiming oil when necessary@ and routines for restoring oxi?dation resistance by additions of inhibitors.
IEEE 64-1956 history
1970IEEE 64-1969 IEEE Guide for Acceptance and Maintenance of Insulating Oil in Equipment
1956IEEE 64-1956 Proposed to Guide for Maintenance of Insulating oil