METHOD, SYSTEM AND ASSEMBLY FOR DETERMINING A REDUCTION OF REMAINING SERVICE LIFETIME OF AN ELECTRICAL DEVICE BASED ON A TEMPERATURE DEPENDENT AGING FACTOR

摘要

The present invention relates to a method of determining a reduction of remaining service lifetime of an electrical device (12) during a specific time period. A measurement system is provided comprising a temperature measurement device (20), a current measurement device and a voltage measurement device. A temperature value, voltage values and current values are measured by using the measurement device. A temperature dependent aging factor is determined based on the temperature value and the reduced maximum operating temperature. The reduction of remaining service life is determined based on the specific time period, and the temperature dependent aging factor. Said temperature measurement device (20) is adapted to measure the ambient temperature outside said electrical device (12) and derive said set of temperature values from said ambient temperature, said set of current values, and said set of voltage values