Preparation work before megger measurement
Insulation resistance meter is also abbreviated as megohmmeter. Nowadays, digital megohmmeter is commonly used. It...
March 16, 2026
Withstand voltage test steps and result judgment
Pressure test steps for oil-immersed test transformers During the test, the following steps should be...
The use of high voltage generator discharge rod
1. Reference to the use of supporting current-limiting resistors for DC high-voltage generators. Theoretically, current-limiting...
Dry-type transformer operating environment
Dry-type transformers are a kind of transformers. For the use of dry-type transformers, attention should...
Why is DC resistance not equal to AC resistance
1. From a microscopic point of view, many physical properties of media, including conductivity, permittivity,...
Electrical system grounding resistance
Electrical grounding: Grounding refers to the neutral point of the power system and electrical installations,...
Oil-immersed transformer insulation material
Commonly used insulating materials for oil-immersed transformers include insulating cardboard and transformer oil. Liquid insulation...
Three test methods of ground resistance tester
The ground resistance tester should be used in the ground resistance test. During use, not...
The influence of dry-type transformer shell
If you carefully observe the dry-type transformer, you can see the shell of the dry-type...
Principle analysis of insulation resistance tester
Insulation resistance refers to the resistance between two parts of conductors separated by insulating materials,...