Application

Rail and transportation systems – including high-speed rail, conventional railways, subways, light rail, tramways, airports, and seaports – form the lifeline of modern economies. These systems demand absolute reliability, safety, and efficiency from every electrical component. At Shandong Kerui Transformer Co., Ltd. , we provide specialized transformer solutions engineered to meet the rigorous requirements of traction power, station distribution, and auxiliary systems in transportation infrastructure.

Why Rail & Transportation Systems Need Specialized Transformers
Transportation environments present unique challenges that standard transformers cannot address:

• Continuous vibration and shock – from moving trains and heavy traffic.

• Wide temperature ranges – outdoor trackside installations face extreme weather.

• Limited space – tunnels, underground stations, and wayside cabinets.

• Fire safety – tunnels and underground spaces demand flame-retardant, low-smoke transformers.

• High short-circuit withstand – frequent starting and regenerative braking cause power surges.

• Low noise – stations and residential areas near tracks require quiet operation.

• Uninterrupted operation – 24/7/365 availability for passenger safety and schedule adherence.

Our Transformer Products for Rail & Transportation Applications

1. Traction Transformers
   – Mounted on rolling stock (locomotives, EMUs, metro cars) to step down overhead line voltage (25KV, 15KV, 3KV, 1.5KV) to auxiliary or traction converter levels.
   – Oil-immersed or dry-type designs with high resistance to vibration and thermal cycling.

2. Wayside Distribution Transformers
   – Step down grid voltage (110KV, 35KV, 10KV) to station voltage (0.4KV) for lighting, escalators, signaling, and HVAC.
   – Available as oil-immersed (for outdoor trackside) or dry-type (for indoor/underground substations).

3. Dry-Type Transformers – SCB Series (Epoxy Resin Cast)
   – Ideal for underground stations, tunnels, and platform areas.
   – Fire-safe, self-extinguishing, no oil leakage, low smoke emission.
   – Ultra-low noise design (≤45 dB) for passenger comfort.
   – Available in SCB14 (Level 2) and SCB18 (Level 1) energy efficiency.

4. Dry-Type Transformers – SGB Series (Non-Encapsulated / Class H Insulation)
   – Suitable for poorly ventilated equipment rooms.
   – Excellent heat dissipation and overload capacity.

5. Compact Box Substations (American-style & European-style)
   – Pre-assembled units for wayside power distribution, signaling systems, and telecom base stations along rail lines.
   – Weatherproof, vandal-resistant, and quick to deploy.

6. Low-Voltage Isolation Transformers
   – For signaling systems, interlocking, SCADA, and communication equipment.
   – Provide galvanic isolation and noise filtering.

Key Advantages of Kerui Transformers for Rail & Transportation

• Vibration & Shock Resistance: Robust core and coil clamping systems withstand continuous mechanical stress from passing trains.

• Fire & Safety Compliance: Our dry-type transformers meet EN 45545 (railway fire safety standard) and NFPA 130 requirements for tunnels and underground stations.

• Energy Efficiency: Level 1 (SCB18) and Level 2 (SCB14) transformers reduce no-load losses, lowering energy costs for 24/7 station operations.

• Low Noise: Noise levels as low as 42 dB, essential for stations and residential neighborhoods.

• Compact & Modular Design: Fits into cramped electrical rooms, trackside cabinets, or under-platform areas.

• High Short-Circuit Withstand: Handles regenerative braking surges without damage.

• Wide Voltage Range: From low voltage (0.4KV) up to 110KV and 220KV for main traction substations.

• Customization: Available with special enclosures (IP54, IP65), tropicalized coatings, and customized impedance.

Typical Rail & Transportation Applications

• High-speed rail & conventional railways – traction substations, auto-transformers for 2×25KV systems.

• Metro & subway systems – underground station dry-type transformers, trackside lighting transformers.

• Light rail & tramways – compact box substations along urban lines.

• Airports – power distribution for terminals, runways, baggage handling, and airfield lighting.

• Seaports & intermodal terminals – heavy-duty transformers for cranes, refrigerated containers, and automated guided vehicles.

• Signaling & telecom systems – isolation transformers for fail-safe operation.

Case Example
A metro line expansion project in Southeast Asia selected our SCB14 dry-type transformers for all underground station auxiliary power. The transformers achieved <45 dB noise, passed strict EN 45545 fire safety tests, and have operated flawlessly for over 18 months without any unplanned outage. The transit authority has since standardized on Kerui for future extensions.

Conclusion
Rail and transportation systems cannot compromise on safety, reliability, or efficiency. Shandong Kerui Transformer Co., Ltd. delivers rugged, fire-safe, and energy-efficient transformer solutions tailored for trackside, on-board, station, and signaling applications. From underground metros to high-speed rail, we keep the world moving.

Contact our transportation solutions team today to discuss your project requirements.