How to do frequency slip test
Rated operating voltage, the voltage value output in the rated operating state, generally 57.740V, rated...
Reasons for change in insulation value
Electricity safety problems exist in the process of electricity consumption. In electrical equipment, such as...
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...
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...
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...