Deterioration discriminating device and deterioration discriminating method

A deterioration determining device, comprising:

• temperature acquiring circuitry to acquire a temperature of an insulating member covering a conductor;
• damage level determining circuitry to perform correction to increase the temperature of the insulating member acquired by the temperature acquiring circuitry for each target period, and determine, for each target period, a damage level based on the temperature of the insulating member after the correction and on a relationship between a temperature and a service life of the insulating member, the service life being a time period for which the insulating member is usable, the damage level indicating an elapsed time within the service life corresponding to the temperature of the insulating member acquired by the temperature acquiring circuitry;
• and
• determining circuitry to determine a degree of deterioration of the insulating member based on the damage level determined for each target period.

A deterioration determining method, comprising:

• acquiring a temperature of an insulating member covering a conductor;
• determining, for each target period, a damage level based on the acquired temperature of the insulating member and on a relationship between a temperature of the insulating member and a service life being a time period for which the insulating member is usable, the damage level indicating an elapsed time within the service life corresponding to the acquired temperature of the insulating member;
• and
• determining a degree of deterioration of the insulating member based on a cumulative damage level that is a cumulative value of the damage level determined for each target period.