The YDJ series oil-immersed test transformer is a series of test transformers developed and produced after extensive improvements based on the original similar products according to the "Test Transformer" standard. This product is a new type of product developed and produced in accordance with DL/T848.2-2004 "General Technical Conditions for High-Voltage Test Devices - Part 2: Power Frequency High-Voltage Test Devices". This series of products has the characteristics of small size, light weight, compact structure, complete functions, strong universality, and convenient use. It is especially suitable for insulation strength tests 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 indispensable important equipment in high-voltage testing.





Characteristics of high-voltage test transformers: Single-phase, large transformation ratio (from 0.2KV to 75KV), smooth voltage regulation (up and down) can be achieved through an auto-transformer (on the low-voltage input side), small size, small output current, and has the characteristics of high voltage and low current. [Supplementary Explanation] The test capacity is generally about 5 to 10 thousandths of the capacity of the tested object or the tested power transformer, and it is a short-time working equipment. Test transformer: suitable for insulation strength tests 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, transportation, postal and telecommunications departments, scientific research units, etc.