Technical
-
Common failure and treatment about DC high voltage generator
DC high voltage generator common failure and treatment 1. Abnormal output voltage: it may be caused by a power failure, short circuit or open circuit of the output circuit. The treatment method includes checking the power supply to confirm whether the power supply is normal; Inspect output circui...Read more -
What tests can be done with the DC high voltage generator
1. Insulation resistance test Insulation resistance is the most basic insulation index of electrical equipment and circuits. When a DC voltage is applied to a dielectric, the resistance corresponding to the leakage current flowing through the dielectric after a certain period of time is called in...Read more -
How to use the ground resistance tester in a harsh environment?
In sandy and rocky soils with high soil resistivity, in order to meet the requirements of low grounding resistance, a grounding network composed of multiple grounding bodies connected in parallel is often used. But sometimes a large amount of steel is used, and the ground area is large. It is oft...Read more -
Common problems of dry-type transformers and oil-immersed transformers
1. What is a dry-type transformer? A dry-type transformer is a transformer that never uses any insulating liquid, and its windings or core are immersed in the liquid. Instead, the windings and core are kept in a sealed tank pressurized with air. 2. What are the uses of dry-type transformers? Dry ...Read more -
What the meanning about series resonance flashover protection
“Flashover” may be mentioned in different applications, such as the flashover protection of circuit breakers? Insulating oil flashover protection? Flashover refers to the phenomenon of discharge along the surface of the solid insulator when the gas or liquid dielectric around the soli...Read more -
How to prevent oil-immersed transformers from leaking
Prevent Oil Leakage of Oil-immersed Transformer The oil-immersed transformer oil tank is filled with transformer oil, and the oil-resistant rubber parts are pressurized and sealed by fasteners during assembly. Lack of sealing is the main reason for oil leakage of oil-immersed transformers, so spe...Read more -
How to Measure PD (Partial Discharge)
Various methods are used to detect PD, including detection of sound, light, and radio frequency (RF) signals. Typically an alternating current (AC) hipot test with capacitive coupling is used. This article focuses on PD detection using surge testing. This newer method is becoming popular and is...Read more -
Fault Analysis of Oil-immersed Transformer
Oil-immersed transformer weld seam oil leakage The main reason is that the welding quality of the oil-immersed transformer is poor. The welds of oil-immersed transformers have defects such as false welding, desoldering, pinholes and air bubbles. It was covered by flux and paint when leaving the f...Read more -
Meaning of test terms in circuit breaker dynamic characteristic tester
During the use of the circuit breaker dynamic characteristic tester, electric workers will use some professional terms to describe the test results or test process. So, what does the test term mean when testing circuit breakers? The following article introduces it to you. ...Read more -
What are the components of the insulating boots (gloves) hipot test set?
Insulating boots and gloves withstand voltage test device is one of the commonly used safety testing equipment in electrical engineering. It is mainly used to measure the withstand voltage performance of insulating devices such as insulating gloves and insulating boots to ensure the safety of ele...Read more -
Why test the dielectric strength of insulating oil?
The main reason for testing the dielectric strength of insulating oil is that the dielectric strength of insulating oil is an important index reflecting the quality of insulating oil, and this index can directly reflect the withstand voltage capability of insulating oil. The dielectric strength o...Read more -
What are the requirements for DC resistance tester to detect power transformers
For power transformers with a voltage level of 10KV and below, the detection requirements in the winding DC resistance test item are: the transformer is 1.6MVA and below, and the requirements for phase-to-phase difference regulations: it should not be greater than 4% of the average value of the t...Read more