Oil-immersed transformer is also called power frequency withstand voltage test transformer. Oil-immersed transformer is mainly used in preventive tests of power transformer withstand voltage test, cable withstand voltage test and other electrical equipment in power test. Oil-immersed test transformer carries out insulation strength experiments in DC or DC high-voltage power supply for all kinds of high-voltage electrical equipment and insulation materials. Because oil-immersed test transformer has many advantages such as light weight, small size, strong practicability and convenient use, its main uses are very common.
Oil-immersed test transformer is a multifunctional high-voltage compression test transformer designed and developed by electric power according to the specification of "Test Transformer" and based on similar DC withstand voltage test equipment after many improvements. The oil-immersed test transformer of electric power company has excellent material selection, stable quality, stable annual performance, large working voltage margin, low corona discharge sound and small local area. At the same time, the oil-immersed test transformer of YDJ series products adopts new insulation material, which is small in size and light in weight.
Oil-immersed transformer is suitable for power supply system, factories, mines, scientific research institutions and so on to carry out insulation strength experiments on various high-voltage electrical equipment, electrical components and insulation materials in DC or DC high-voltage power supply, and is an indispensable key machine and equipment in high-voltage test. The alias of oil-immersed test transformer is: oil-immersed test transformer for power engineering, oil-immersed test transformer for communication AC, oil-immersed test transformer for AC/DC power supply, high-voltage test transformer, cascade test transformer, light oil-immersed test transformer, experimental transformer, etc., and commonly used experimental transformers with taps.
Structure of oil-immersed transformer
The withstand voltage test equipment of oil-immersed test transformer mainly includes two parts: the oil-immersed test transformer itself and the test transformer control cabinet.
Common problems in purchasing oil-immersed test transformer
Before purchasing the oil-immersed test transformer, select the corresponding test transformer model and specification YDJAT or YDJADT, because the processing technology of YDJ oil-immersed test transformer of power company is slightly different. So will the price. Among them, YDJAT[ volume] [working voltage] type is communication AC oil-immersed test transformer, and YDJADT[ volume] [working voltage] type is AC/DC power oil-immersed transformer. Please confirm with the customer service specialist carefully before purchasing.
Common problems in withstand voltage test of oil-immersed test transformer
1. When applying oil-immersed test transformer to withstand voltage test and transformation test, in addition to understanding the operating instructions of oil-immersed test transformer, it is also necessary to strictly abide by relevant national standards and safety operation procedures. You can refer to GB31183 "Preventive Test Regulations for Electrical Equipment" and so on.
2, withstand voltage test staff must do a good job of division of responsibilities, set up the distance between the experimental sites, carefully and carefully the grounding device of the tested object and the test transformer, and be equipped with full-time personnel to monitor the safety and observe the situation of the tested object.
3. The key position of the tested object should be cleaned up and kept dry, so as to prevent the tested object from being destroyed and the deviation of the experimental standard value.