1 Product Structure



The GTB series dry-type test transformer utilizes advanced production equipment, adopts coil winding epoxy vacuum casting and CD-type iron core made of high-quality cold-rolled silicon steel, effectively reducing magnetic flux leakage. For DC withstand voltage tests, no external silicon stack is needed; simply screw the matching DC high-voltage silicon stack onto the high-voltage end to obtain DC. The GTB series dry-type test transformer, due to its innovative design concept, material selection, and manufacturing process, minimizes volume and weight without compromising performance.





2 Working Principle



This series of dry-type test transformers has an input voltage of 200V or 400V. Using the matching control box (console) with an auto-transformer, the input voltage is adjusted to the primary winding (low-voltage end) of the test transformer. Based on the principle of electromagnetic induction, a high voltage output proportional to the turns ratio of the primary winding can be obtained at the secondary winding (high-voltage end), continuously adjustable from zero volts to the rated maximum value. For DC withstand voltage and leakage current tests, simply install the high-voltage silicon stack at the high-voltage output end to obtain DC high voltage, whose amplitude is 1.414 times the power frequency high voltage value、

3 Product Features




1. High-quality materials, reliable quality, good annual stability

2. Large voltage margin, low corona noise, low partial discharge



3. New insulation materials, small size, light weight





5 Related Information

1. Precautions for using AC/DC dual-purpose test transformers



2. Transformers do not actually produce electromagnetic radiation



3. How to perform on-site phase determination for distribution transformers



4. Brief description of power transformer test items and selection of test equipment



5. Basic knowledge of transformers



6. How to choose a test transformer



7. Fault analysis and handling of transformers



8. Analysis of transformer short-circuit accidents



9. Definition of power transformer models



10. Characteristics and applications of power frequency resonant transformers



11. Principle and handling of moisture absorption and dampness in transformer core after drying



12. How is partial discharge in transformers generated? How to prevent it?



13. Transformer application solutions



14. Classification and protection of oil-immersed transformers