IEEE 637-1985

The scope of this guide covers mineral insulating oil commonly defined as transformer oil; definition and description of reclaiming procedures; the test methods used to evaluate the progress and end point of the reclamation process, and what criteria recommended for the use of reclaimed oils are considered suitable. This guide does not cover the use of oil in new apparatus under warranty.

The purpose of this guide is to further oil conservation by providing detailed procedures for reclaiming used mineral insulating oils by chemical and mechanical means, making them suitable for reuse as insulating fluids. The guide describes the essential properties required for reuse in each class of equipment and the recommended test methods. The purpose of ANSI/IEEE C57.106-1977 [24]1 is to aid the operator of the electric power equipment to evaluate the serviceability of new, unused transformer oil contained in new equipment, or as received from the refiner for filling new equipment. The recommendations and tests in ANSI/IEEE C57.106-1977 [24] are intended also to provide the operator with good estimates of the continued reliability of the oil in service in equipment and guidance for the reconditioning of oil by mechanical means. These estimates in turn suggest minimum property limits for restoring used oils to as near theft original condition as possible utilizing current techniques.

New IEEE Standard - Superseded. Detailed procedures are provided for reclaiming used mineral insulating oils (transformer oils) by chemical and mechanical means to make them suitable for reuse as insulating fluids. Reclamation procedures are described, as are the test methods used to evaluate the progress and end point of the reclamation process and the essential properties required for reuse in each class of equipment. Suitable criteria for the use of reclaimed oils are identified. The use of oil in new apparatus under warranty is not covered.