Improvement of Insulation Tests for Diagnosis of Traction Motors
Hiroshi HATA, Takashi MAEDA
Insulation breakdown is one of the biggest troubles of traction motors. Various kinds
of insulation tests such as insulation resistance test, tan delta test, are carried out
in the workshop with all the traction motors every 2 or 3 years. This time we improve 2
points about the tests. The first point is quantification of temperature and humidity
effects in the results of insulation tests. And the second point is to check the validity
of insulation tests by carring out insulation breakdown tests of many motors for the
first time.