How to measure insulation of dry type transformer

    Dry type transformer can work without transformer oil. There are many performances of dry-type transformer. Generally, the insulation performance of dry-type transformer is an important feature of dry-type transformer, and its insulation performance varies greatly. Its size can be measured. How to measure the insulation performance of dry-type transformer? Let's have a detailed look with the editor of transformer manufacturer

     When the solid insulating material is broken down, it will irreversibly lose its electrical insulation performance. Therefore, the insulation selection of electrical lines and equipment must match the voltage level, and must adapt to the use environment and operating conditions, so as to ensure the safety of insulation. In addition, due to corrosive gas, vapor, moisture, conductive dust and mechanical operation, the insulation performance of insulating materials may be reduced or even damaged. Moreover, the long-term effect of environmental factors, such as sunlight, wind and rain, can also make the insulation material aging and gradually lose its insulation performance. The insulation resistance of various lines and equipment under different conditions is as follows: in general, the low voltage after new installation or overhaul shall not be less than 100m Ω; the insulation resistance of low voltage lines and equipment in operation shall not be less than 3m Ω / V; the insulation resistance of equipment and lines in wet conditions shall not be less than 2.5m Ω / V; the insulation resistance of equipment and equipment in operation shall not be less than 3m Ω / V; the insulation resistance of equipment and equipment in wet conditions shall not be less than 2.5m Ω / v; The insulation resistance of control line shall not be less than 1m Ω, and that of high voltage line and equipment shall not be less than 1000m Ω.