Test high-voltage apparatus is produced based on the Ministry of Machinery and Electronics' "Test Transformer" standard, with extensive improvements over the original similar products. It is a new type of AC/DC high-voltage tester produced based on the YD series test transformers, improved according to the national standard "JB∕T 9641-1999". This series of products features small size, light weight, compact structure, complete functions, strong universality, and ease of use. It is particularly suitable for insulation strength testing under power frequency or DC high voltage for various high-voltage electrical equipment, electrical components, and insulating materials in power systems, industrial and mining enterprises, and scientific research departments. It is an essential and important equipment in high-voltage testing.

Structure




1. The design concept, material selection, and process flow of the YDQ series products are entirely new. Therefore, they not only have small size, light weight, and attractive appearance, but also all technical indicators meet high international standards.
The YDQ series products use high-quality cold-rolled DQ-151 oriented silicon steel sheets stacked into a multi-stage cylindrical frame-shaped iron core, and use QZ type wires to directly and continuously wind high-voltage tower-type coils on a specially made high-strength insulating cylinder. The shell is of suitable size and filled with SF6 gas.
2. The difference between YDQ (JZ) products and YDQ products is that the high-voltage rectifier silicon stack is cleverly installed inside the high-voltage bushing, and by inserting or extracting the short-circuit rod, it can be switched between power frequency high-voltage AC output and high-voltage DC output.
3. The difference between YDQ (C) products and YDQ products lies in the internal structure of the bushing and the structure of the high-voltage coil.
4. YDQW products are based on ordinary transformers, with improved craftsmanship and technology, adopting different insulation structures, and utilizing the arc-extinguishing capability of SF6 gas itself, so that under high voltage, the transformer basically has no partial discharge. Thus, when using this transformer as a high-voltage power source for partial discharge tests on electrical equipment, combined with a high-precision



 partial discharge detector, it can accurately measure the partial discharge amount of the test object without interference.