40 Units of S11-1250kVA/27.5kV Transformers for a High-Speed Railway in China

Project Overview

HBTP supplied 40 units of S11-1250/27.5 transformers for a 350km/h high-speed railway traction power supply system in a high-speed rail corridor in China. The project represents a significant deployment in the high-speed railway sector, requiring transformers engineered for reliable operation under demanding conditions.

Project Background

China has the world's largest high-speed rail network, with over 40,000km of track. This 350km/h line requires specialized traction power supply systems, including autotransformers and distribution transformers at stations and along the route. Train loads are highly pulsating as trains pass each section.

Customer Requirements

Our Solution

HBTP supplied its S11-series transformers, engineered specifically for high-speed railway applications. The high-quality CRGO silicon steel core with step-lap mitered joints minimizes no-load losses, while copper windings provide enhanced short-circuit withstand capability and long service life.

Quality & Testing

All units passed pulsating load simulation tests to verify thermal performance under rapid load changes typical of high-speed rail operation. Standard electrical tests plus railway-specific requirements were performed per TB/T standards.

Delivery & Installation

The 40 units were delivered to multiple substation sites along the railway corridor. HBTP provided installation support and coordination with the railway's traction power system engineers.

Project Outcomes

All 40 transformers were successfully energized and are operating at rated capacity. The project was completed on schedule, and the customer has reported excellent performance with no unplanned outages attributed to transformer equipment. HBTP's reliable power distribution solution has contributed to the project's overall success and operational efficiency.