30 Units of S13-800kVA/35kV Transformers for a Metro Line Extension in Japan
Project Overview
HBTP supplied 30 units of S13-800kVA/35kV oil-immersed transformers for a metro line extension project in Osaka, Japan. The extension adds 12 new stations to the city's rapid transit network.
Project Background
Japan's metro systems are known for their reliability and punctuality. This extension project required compact, high-efficiency transformers for installation in underground substations with limited space and strict vibration requirements.
Customer Requirements
Specifications included: 800kVA capacity, 35kV/0.4kV ratio, S13 efficiency, compact design for underground installation, low vibration and noise, compliance with JIS standards, and seismic resistance for Japan's earthquake-prone environment.
Our Solution
HBTP engineered compact transformers with reduced footprint while maintaining S13 efficiency. Special attention was given to seismic bracing and vibration damping to meet Japan's strict building codes for underground infrastructure.
| Parameter | Specification |
|---|---|
| Model | S13-800/35 |
| Capacity | 800 kVA |
| Voltage Ratio | 35 / 0.4 kV |
| Efficiency | S13 |
| Seismic Rating | JIS Level 2 |
| Standard | IEC / JIS |
Quality & Testing
All units passed vibration and seismic simulation tests in addition to standard electrical tests. Japanese inspection agencies witnessed factory acceptance tests before shipment.
Delivery & Installation
The compact transformers were designed for transport through standard metro tunnels, eliminating the need for special delivery shafts. HBTP provided Japanese-language documentation and technical support.
Project Outcomes
The metro extension opened on schedule with all transformers passing final inspection. The compact design and seismic resistance have been highlighted by the client as key factors in the project's success.
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