ニュース

Vacuum epoxy casting technology is widely used in transformer production to improve the performance of transformers. However, due to the complexity of the process and the use of high temperature and vacuum, it can also lead to faults in some transformers. Therefore, it is important to have a good understanding...

How does the load test run of the transformer work? When conducting a load test for transformers, the transformer can proceed to the load test phase only if there are no abnormalities during 24 hours of no-load operation. The specific operational steps are outlined below: (1) Gradual Load Increase: Initiate...

With the development of modern industry and the widespread use of electronic equipment, the problem of electromagnetic interference (EMI) has become increasingly serious. Vacuum epoxy resin casting transformer, as a type of power transformer, is also affected by electromagnetic interference. Therefore, the electromagnetic interference immunity of the vacuum epoxy resin...

What’s the Steps for No-Load Trial Operation of Transformers (1) During the trial operation phase, start by placing the tap changer in the middle position and conduct a no-load trial run. Then, gradually switch to various positions, observing the contacts for proper engagement and ensuring normal operation. (2) If the transformer...

Vacuum epoxy cast transformers are widely used in power systems due to their excellent electrical insulation and mechanical strength. Insulation design is a crucial factor for the performance and reliability of these transformers. The insulation system of a vacuum epoxy cast transformer includes solid insulation and liquid insulation. Solid insulation...

What is the Structure and Functions of transformer? The fundamental structure of a transformer comprises a core, winding, and insulation components. In order to ensure the safe and reliable operation of the transformer, it is also equipped with components such as an oil tank, voltage-regulating device, cooling system, and protective devices. The...

Thermal management and temperature control are crucial for the safe and efficient operation of vacuum epoxy resin cast transformers. The transformer should be designed with proper thermal management to prevent overheating, which can cause insulation failure and even fire hazards. The temperature inside the transformer should be controlled within a...

What’s the Purpose and Significance of Partial Discharge Testing Partial discharge refers to the phenomenon of discharge that occurs between electrodes but does not penetrate them. It is caused by weaknesses in the insulation of electrical equipment or defects in the manufacturing process, leading to repeated breakdowns and extinguishing under high...

Vacuum epoxy resin cast transformers are widely used due to their various advantages, including low noise, low partial discharge, high reliability, and long service life. To ensure the safe and stable operation of these transformers, several tests need to be conducted before putting them into operation. (1) Insulation resistance test:...

What are the voltage levels of transmission and transformation lines in China? How can we distinguish between step-up and step-down transformers? In China, the voltage levels of transmission and transformation lines include the following values (kV): 0.38, 3, 6, 10, 15 (20), 35, 60, 110, 220, 330, 500. The voltage...

How are Power Transformers Classified by Insulation and Cooling Medium? Power transformers can be classified based on the insulation and cooling media of the winding, mainly including liquid-immersed, gas, and dry-type transformers. 1. Liquid-Immersed Transformers: Liquid-immersed transformers use insulating liquid to immerse the winding and the insulation outside the winding. This...

What are the fault classifications of transformers? Faults in oil-immersed power transformers are generally divided into two main categories: internal faults and external faults. Internal faults primarily occur within the transformer's oil tank, including phase-to-phase short circuits between winding groups, turn-to-turn short circuits between winding turns, and grounding faults caused...