The 2×27.5kV autotransformer is a cutting-edge transformer designed for the electrified railway AT power supply system. This autotransformer features a grounded midpoint and boasts a low short-circuit impedance, with a short-circuit impedance not exceeding 0.45Ω when referred to the 27.5kV side (typically 0.3Ω for passenger dedicated lines).

Drawing upon the best practices of similar products both domestically and internationally, coupled with extensive experience in manufacturing large-scale electrical transformers, this product showcases a mature structural design. It excels in minimal noise production, low energy loss, robust short-circuit resistance, and dependable, stable operation.

Key Performance Characteristics:

1. The winding design and manufacturing processes are meticulously crafted to ensure the transformer’s robust short-circuit resistance, insulation strength, and heat dissipation capabilities.

2. The housing and enclosure are securely fastened using a specialized positioning method for utmost reliability.

3. The iron core is machine-assembled with a fully automated robotic system, featuring a complete staggered 45° 7-tier step lap structure, resulting in minimal no-load losses.

4. The iron core structure is securely fastened, providing exceptional short-circuit resistance.

Our transformer production facility covers an area of over 40 hectares with a construction area of 180,000 square meters. It employs more than 1000 people and is equipped with a complete set of advanced transformer production and testing equipment, including cutting, vacuum casting, vacuum impregnation, and other facilities. It has an annual production capacity of 30 million kVA for power transformers. We boast an array of cutting-edge equipment representing a high standard within the industry, including a complete set of shearing machines, fully automated winding machines, robot-operated stacking machines, the Hedrch Vacuum Casting Equipment, vacuum impregnation systems, air cushion transport vehicles, a fully enclosed production workshop with a cleanliness level of 100,000, 20-ton vertical winding machines, 10-ton horizontal winding machines, coal-oil gas phase drying equipment, and a 200-ton overhead crane.