How is the insulation resistance tester used?
The reason why electricity can be used by people is largely because of insulation, that...
March 2026
DC withstand voltage and leakage current test
When the test voltage is added to the specified voltage value, keep it for the...
Resistance absorption ratio and polarization index
What is polarization index and absorption ratio Polarization index (PI) and absorption ratio (DAR) are...
Causes of unbalanced three-phase resistance
Generally, there are several reasons: 1. The conductive rod in the transformer bushing is in...
What factors affect the resistance test?
1. Test voltage and electric field strength The resistivity (rate) value of the dielectric material...
Test principle of relay protection tester
The relay protection tester mainly focuses on relays, microcomputer protections, and other protection devices for...
Fault diagnosis of DC high voltage generator
1. Percussion hand pressure method We often encounter the phenomenon of good and bad when...
Several temperatures of oil-immersed transformer
The insulation structure of oil-immersed transformers is mainly oil-paper insulation, which is a combination of...
Operation steps of DC withstand voltage
The DC high voltage generator is mainly used for the DC withstand voltage and leakage...
Insulation resistance test technology method
Measuring the insulation of a transformer is one of the effective means to effectively detect...