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Modular, factory-tested, and climate-resilient traction substation packages designed for rapid deployment, catenary power feed, and optimal network stability across electrified transit networks.
Compact outdoor step-down substation integrated with traction feeding circuit breakers, dry-type auxiliary transformers, and digital SCADA micro-terminals for railway wayside power.
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Engineered for metro and light rail transit, housing 24-pulse diode rectifiers, DC high-speed circuit breakers, and negative ground fault protection panels for rapid deceleration regen.
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Designed for modern high-speed trunk lines, suppressing inductive interference and catenary voltage drop over prolonged booster intervals with supreme dynamic thermal stability.
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Automated sectionalizing kiosk featuring ultra-fast vacuum circuit breakers, harmonic suppressors, and catenary fault locator relays for seamless inter-track load equalization.
Explore Specifications →In modern transportation infrastructure, electrified railway and traction power systems represent the apex of heavy-duty power engineering. As global transit authorities accelerate decarbonization and shift freight from highway to rail, traction substation equipment must satisfy stringent operational criteria: continuous short-circuit withstand, severe harmonic distortion resistance, asymmetric dynamic loading, and resilient dielectric recovery. Traction substations bridge high-voltage municipal utility grids (typically 110kV, 220kV, or 330kV) and the overhead catenary or third-rail distribution networks operating at standard traction voltages (such as AC 25kV 50/60Hz, DC 1500V, and DC 750V).
A railway traction substation is subjected to cyclic loading characteristics starkly distinct from typical industrial distribution networks. Locomotive start-ups, rapid acceleration curves, and regenerative dynamic braking induce transient voltage spikes, severe intermittent overloads, and high current step changes. Consequently, switchgear, rectifier-transformers, disconnectors, and automated protective relays must exhibit superior mechanical endurance, thermal inertia, and robust harmonic mitigation.
Railway traction loads represent unbalanced single-phase or multi-phase non-linear impedances. Advanced traction transformers utilize Scott-connected, V/v, or balance-connected winding configurations to minimize negative-phase sequence currents injected into the national transmission grid.
Modern rolling stock regenerates up to 30% of consumed kinetic energy during braking. Integrated DC traction substations incorporate bidirectional inverter units and supercapacitor energy storage systems to absorb or feed regenerative energy back to the AC utility grid.
Given the extreme fault current capabilities of rail substations, our equipment integrates ultra-fast optical arc sensors, automatic rail potential limiters (OWD/VLD), and stray current drainage systems to eliminate touch-voltage hazards and electrolytic pipeline corrosion.
Tailoring transformer designs, switchgear insulation mediums, and power electronic converters to specific transit modalities.
Predominantly deployed in high-speed rail lines, intercity transit networks, and heavy-haul freight corridors. The substation steps down utility transmission voltages down to single-phase 27.5kV or auto-transformer 55kV systems.
The global benchmark for urban rapid transit including underground metros, monorails, and light rail transit (LRT). These substations convert incoming AC medium voltage (10kV to 35kV) into clean DC traction power.
Yueqing Suian Electric Co., Ltd. is a wholly state-owned trading company controlled by Yueqing Liushi Urban and Rural Construction Investment Co., Ltd., with a registered capital of 10 million yuan. It has been deeply involved in the field of electrical product trading. With its solid state-owned background, rich experience in serving central enterprises, and the leading electrical industry ecosystem and location empowerment in China, it is committed to pioneering a new pattern of global electrical trade with the responsibility of a state-owned enterprise, becoming a core partner of the electrical supply chain trusted by global customers, and providing high-standard and reliable electrical products and solutions for overseas markets.
Liushi Town, known as "Zhejiang's No. 1 Industrial Strong Town," achieved a total industrial output value of 106.76 billion yuan in 2024, exceeding 100 billion yuan for two consecutive years and firmly ranking first in Zhejiang Province among the top 1,000 towns in China in terms of comprehensive strength. As a wholly state-owned enterprise, the company, backed by the state-owned capital of the Liushi Town Government, naturally possesses core advantages such as strong financial strength, compliant operation, and strong risk resistance.
The company has accumulated extensive cooperative experience in the domestic market, successfully serving numerous leading central enterprises, including China Construction Eighth Engineering Bureau, China Construction Science & Industry Group Co., Ltd., China Construction Second Engineering Bureau, and Sinopec. It has accumulated rich project experience in infrastructure engineering, energy and power, and other fields. Its products and services have passed the stringent standards of central enterprises and possess mature capabilities suitable for large-scale projects and complex scenarios.
Based in Liushi, Yueqing, known as the "Electrical Capital of China" and the "Export Base of Low-Voltage Electrical Appliances in China," the company focuses on core trade in the electrical field. Boasting unparalleled supply chain advantages, it mainly deals in over 200 series and 25,000 models of products, including transformers, high and low voltage electrical equipment, complete sets of electrical equipment, wires and cables, and new energy electrical products.
Leveraging state-owned platform resources, the company ensures product quality and supply stability while achieving high cost-effectiveness through the scale effect of industrial clusters, providing diversified product choices for overseas customers. Deeply integrated into the "Belt and Road" initiative, the company excels in connecting with major overseas infrastructure and energy projects, and can provide supporting services for electrical products that meet international standards.
Adhering to the core principles of "integrity as the foundation, compliance as the basis, and win-win cooperation as the way," Yueqing Sui'an Electric Co., Ltd. builds a solid foundation for cooperation with the credibility of a state-owned enterprise, ensures product quality with the service experience of a central enterprise, empowers global competitiveness with the advantages of industrial clusters, and connects overseas markets with professional services.
The shift towards predictive maintenance, fiber-optic process bus networking, and edge-AI diagnostic analytics in modern railway power infrastructures.
The railway electrification sector is currently undergoing a massive paradigm shift from traditional electromechanical maintenance schedules to automated, AI-assisted digital substations. Conventional physical copper hardwiring between instrument transformers and protection relays is being superseded by IEC 61850-9-2 Sampled Values (SV) and GOOSE messaging over redundant fiber-optic rings. This architectural transformation drastically minimizes fire hazards, isolates control buildings from high-voltage switchyard transients, and facilitates instantaneous remote diagnostics.
Embedded UHF and acoustic sensors inside GIS enclosures and dry-type transformers detect micro-insulation breakdowns before catastrophic dielectric collapse occurs, forwarding health indexes directly to central OCC dispatchers.
Automated trackside infrared cameras monitor busbar joints, disconnect switch contacts, and rectifier heat sinks in real time, leveraging machine learning image recognition to isolate anomalous temperature differentials.
Real-time thermal monitoring of overhead catenary conductors integrated with traction substation dispatch software dynamically recalculates ampacity headroom according to ambient temperature, solar radiation, and train headway schedules.
Upholding state-owned enterprise accountability to deliver guaranteed product compliance, zero-compromise electrical safety, and sustainable long-term value for global utility and rail stakeholders.
Continuous engineering refinement in compact prefabricated enclosures, high-capacity switchgear designs, and smart digital substation monitoring systems that meet evolving international grid codes.
Seamlessly aligning with top EPC contractors, rail infrastructure bureaus, and international transit operators through responsive, agile supply chain orchestration and turnkey project delivery.
Empowering eco-friendly electrified mass transit with energy-efficient amorphous core transformers, SF6-alternative eco-gas switchgear, and regenerative braking energy recovery units.
Rigorous type-testing, precision CNC sheet metal fabrication, automated insulation processing, and full-spectrum routine dielectric verification ensure flawless performance under extreme railway operating duties.
Comprehensive selection of primary and secondary substation apparatus engineered in accordance with IEC 60076, IEC 62271, EN 50163, and IEEE 1653 standards.
Prefabricated outdoor kiosk designed for railway signaling, interlocking, communications, and station platform auxiliary power supplies.
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Custom engineered for urban transit subways, combining high efficiency phase-shift transformers with heavy-duty silicon diode banks.
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Compact gas-insulated switchgear modularly configured for tight underground metro shafts and aggressive industrial railway environments.
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Eliminates stray telecommunication interference while effectively extending inter-substation distances across high-speed rail lines.
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Provides rapid interruption of severe DC short circuits, integrated with di/dt and Delta-I rate-of-rise transient trip mechanisms.
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Eliminates negative phase sequence unbalance, mitigates 3rd/5th/7th harmonics, and stabilizes catenary power factor above 0.98.
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Captures braking energy from decelerating trains, converting DC bus voltage back into AC grid power to slash overall transit operational costs.
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Comprehensive railway substation control platform with precise distance protection, autoreclosure, and GPS-synchronized event recording.
Product Details →Equipped with 2x25kV AT systems that accommodate extreme short-duration power surges of multiple high-speed trainsets simultaneously operating in the same electrical section, backed by high-speed differential protection schemes.
Focused on compact footprint, ultra-low acoustic noise, zero oil-spill risk, and high fire safety class (F1/C2/E2). Modular prefabricated construction allows seamless underground installation within constricted civil ventilation shafts.
Engineered for continuous heavy mechanical and electrical load cycling. Robust thermal capacity prevents premature aging of transformer windings under uninterrupted 30,000-ton bulk freight haulage duties in harsh climatic zones.