Method of estimating the insulation life of a resin insulator
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsMitsuyo Asahi, Junzou Enomoto, Takao Tanaka, Aiichiro Hashizume
Life of this patent
Estimating the term…
Abstract
Either a monitoring resin piece associated with an electrical appliance or a resin piece forming a part of the insulating components of the electrical appliance is taken out after the electrical appliance has been operated for a suitable period of time, and either the ratio of the number of hydrogen atoms to the number of carbon atoms or the ratio of the number of oxygen atoms to the number of carbon atoms is measured to estimate the insulation life of the resin insulator of the electrical appliance.
Claims4
A method of estimating the insulation life of a resin insulator in an electrical appliance, comprising the steps of:
- providing at least one monitoring resin insulator sample in association with said appliance, said sample having the same insulating characteristics as said insulator in said appliance and said sample being made of a resin insulator material having a hydrogen to carbon atom ratio which varies with lifetime to a greater extent than the hydrogen to carbon atom ratio of said resin insulator in said appliance, and
- measuring the ratio of the hydrogen atoms to the carbon atoms in said sample, whereby said measured ratio provides an indication of the deterioration of the insulation breakdown voltage of said resin insulator.
A method of estimating the insulation life of a resin insulator in an electrical appliance, comprising the steps of:
- providing at least one monitoring resin insulator sample in association with said appliance, said sample having the same insulating characteristics as said insulator in said appliance and said sample being made of a resin insulator material having a oxygen to carbon atom ratio which varies with lifetime to a greater extent than the oxygen to carbon atom ratio of said resin insulator in said appliance, and
- measuring the ratio of the oxygen atoms to the carbon atoms in said sample, whereby said measured ratio provides an indication of the deterioration of the insulation breakdown voltage of said resin insulator.
Dependencies are inferred from the claim text.