The 25000KVA oil-immersed transformer is the basic experimental equipment used by power stations, power supply bureaus and scientific research institutions and other users to do AC withstand voltage test, and has passed the requirements of the State Bureau of Quality Supervision, and is used to conduct dielectric strength tests under the required voltage for various electrical products, electrical components, insulating materials, etc., to evaluate the insulation level of the product, find the insulation shortcomings of the tested products, and consider the overvoltage capacity.

The 25000KVA oil-immersed transformer is made of single-phase core with the core, and is made of high-quality cold-rolled oriented silicon steel sheets, and the tightening method is made of steel as the clamp. The high-voltage coil is a double-layer vertical barrel, which is wound by high-quality polyester enameled wire and high-voltage insulation materials. The low-voltage coil is outside, and the instrument coil is a single winding, which is generally 100V. The shell is octagonal, and the experimental transformer above 10KVA is equipped with movable iron wheels.

Benefits:

1. At the structural level of the 25000KVA oil-immersed transformer edge, according to the principle of “spacing utility” of transformer oil, multi-layer insulation is selected to divide the inner insulation in the transformer into multiple oil channels, so as to improve the insulation level and reduce the volume.

2.25000KVA oil-immersed transformer solves the problem of leakage oil of TDM series transformer, because TDM series transformer has no oil reservoir, so when the temperature is too high, the oil leaks out from the nozzle after expansion, and this series of products will set the oil injection hole at the top of the casing, and the oil in the casing and the oil in the body are interconnected. Therefore, the casing is equipped with a silicon stack. In addition to functions such as short-circuit rods and string excitation rods, they are also equivalent to transformer oil reservoirs.

3. The 25000KVA oil-immersed transformer uses metal fixed wire and voltage equalization, which avoids the discharge phenomenon.

4. The stain box has a compact structure, a novel appearance and a small size. Lightweight.

5. The core is a single frame core type, DQ type, 0.30mm cold rolled oriented silicon steel sheet is folded, and the new material is used to tighten it, replacing the traditional core-piercing screw. The coil is a concentric cylinder. Double-storey tower structure.

The 25000KVA oil-immersed transformer is one of the important equipment in the power supply system of factories, mining enterprises and industrial buildings, which reduces the network voltage of 10 (6) kV or 35kV to the user’s 230/400V bus voltage. This type of product is suitable for AC 50 (60) Hz, three-phase large short circuit capacity 2500kVA (single-phase large short circuit capacity 833kVA, single-phase transformer is generally not recommended), can be used in indoor (outdoor) applications, can be installed on the pole when the volume is 315kVA and below, the working temperature does not exceed 40 °C, not less than -25 °C, high daily average temperature 30 °C, high annual average temperature 20 °C, relative humidity does not exceed 90% (working temperature 25 °C), altitude does not exceed 1000m. If it is inconsistent with the above conditions of use, it should be adjusted appropriately according to the relevant provisions of GB6450-86.