Product Details

GYSB Power Frequency AC/DC High Voltage Test Transformer

1. Structure of the Power Frequency AC/DC High Voltage Test Transformer:

　　The iron core of this series of products is a single-phase core type, made of high-quality cold-rolled grain-oriented silicon steel sheets, fastened with steel clamps. The high-voltage coil is a cylindrical multi-layer tower type, wound with high-quality polyester enameled wire and insulation materials with high withstand voltage. The low-voltage coil is on the outside, and the instrument coil is an independent winding, generally 100V. The shell is octagonal, and test transformers above 10KVA are equipped with movable iron wheels. It has the characteristics of light weight, small size, easy movement, and superior performance.

2. Working Principle of the Power Frequency AC/DC High Voltage Test Transformer:

　　1) Power Frequency AC/DC High Voltage Test Transformer:

　　Input the power frequency power supply into the operation box (or operation console), and adjust the voltage through the auto-transformer to input to the primary winding of the test transformer. According to the principle of electromagnetic induction, power frequency high voltage can be obtained at the secondary (high-voltage) winding. This power frequency high voltage can be rectified by a high-voltage silicon stack and filtered by a capacitor to obtain DC high voltage, whose amplitude is 1.4 times the effective value of the power frequency high voltage. However, when using DC, the short-circuit rod should be pulled out; when using AC, insert the short-circuit rod.

　　2) Power Frequency AC/DC High Voltage Test Transformer with Taps:

　　In order to simultaneously satisfy the contradiction between higher voltage and lower current, and lower voltage and higher current, the high-voltage winding is divided into two windings: one with a larger current and the other with a smaller current. Then the two windings are connected in series and led out separately. Schematic diagram

　　3) Cascade Power Frequency AC/DC High Voltage Test Transformer:

　　To obtain a higher voltage test transformer, the cascade method can also be used to achieve higher voltage. Figure 2 shows the principle wiring diagram of a three-stage cascade test transformer. The capacity and voltage relationship of the three transformers satisfies: P1=2P2=3P3, U(total)=1U+2U+3U.

GYSB Power Frequency AC/DC High Voltage Test Transformer

3. Main Technical Indicators of the Power Frequency AC/DC High Voltage Test Transformer:

　　>Rated capacity: 1～300KVA

　　>Rated output voltage of a single unit:

　　(AC) 50, 100, 150, 200, 300KV

　　(DC) 70, 140, 210, 280KV

　　>Rated input voltage: 200V, 400V

　　>Transformation ratio: 500/1, 1000/1, 1500/1, 2000/1, 3000/1

　　>Transformation ratio error: ≤±1.5%

　　>Impedance voltage: ＜10%



Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.