This International Standard gives guidance on the supervision and maintenance of the quality of the insulating oil in electrical equipment.
This standard is applicable to mineral insulating oils, originally supplied conforming to IEC 60296, and used in transformers, switchgear and other electrical apparatus where oil sampling is reasonably practicable and where the normal operating conditions specified in the equipment specifications apply.
This standard assists the power equipment operator to evaluate the condition of the oil and maintain it in a serviceable condition. It also provides a common basis for the preparation of more specific and complete local codes of practice.
This standard includes recommendations on tests and evaluation procedures and outlines methods for reconditioning and reclaiming oil and the decontamination of oil contaminated with PCB.
NOTE The condition monitoring of electrical equipment, for example by analysis of dissolved gases, furanic compounds or other means is outside the scope of this standard.
IEC 60422:2005 history
2013IEC 60422:2013/COR1:2013 Mineral insulating oils in electrical equipment - Supervision and maintenance guidance; Corrigendum 1
2013IEC 60422:2013 Mineral insulating oils in electrical equipment - Supervision and maintenance guidance
2005IEC 60422:2005 Mineral insulating oils in electrical equipment - Supervision and maintenance guidance
1989IEC 60422:1989 Supervision and maintenance guide for mineral insulating oils in electrical equipment
1970IEC 60422:1973 Maintenance and supervision guide for insulating oils in service