The V-37/45/62 cable dielectric loss testing system (dielectric loss 37/45/62) is suitable for quantitative evaluation of insulation aging status of distribution cables with a voltage of 35kV and below. It is a scientific method for determining the objects of major repairs and technical improvements in the power supply department the following year. The design service life of cables is generally about 30-40 years. Many domestic cable operation departments have laid cross-linked cables in the 1980s and 1990s, which have gradually entered the later stage of equipment service life. Due to poor cable laying and operating environment quality in China, it poses a great threat to the safe operation of distribution networks. The dielectric loss 37/45/62 test operation is simple, providing you with quantitative evaluation results of aging degree and water tree severity.