China Power Transformer | High-Voltage Transformers & Electrical Solutions

About CTSS

CTSS, under China Transpowers Electric Co., Limited, is a senior player in the power & electric industry, committed to being the No. 1 among top ultra-voltage oil-immersed power transformer, HV power transformer, and special power & distribution transformer suppliers in China.

We focus on the R&D, integration, manufacturing, sourcing, and trading of critical energy infrastructure, including hydro turbine generator units, diesel and gas generator sets, oil-immersed and dry-type transformers, GIS switchgear, and auxiliary electrical equipment.

30+ Years Experience

Global Projects

Our Featured Products

High-performance transformers and switchgear engineered for reliability, efficiency, and long-term operation in power generation, transmission, and distribution networks.

500kV Three-phase Oil-immersed Power Transformer

Ultra-high voltage transformer for long-distance power transmission with enhanced cooling and insulation systems.

Voltage: 500kV
Type: Oil-immersed, Three-phase
Application: Grid substations, HV transmission

500kV Single-phase Oil-immersed Convert Transformer

Designed for converter stations in HVDC systems, ensuring stable voltage conversion and minimal losses.

Voltage: 500kV
Type: Single-phase, Converter
Application: HVDC, Renewable integration

230kV Three-Phase Auto Power Transformer

Efficient autotransformer for interconnecting transmission networks with reduced size and cost.

Voltage: 230kV
Type: Auto, Oil-immersed
Application: Substation interconnection

High-Voltage Gas Insulation Switchgear (GIS)

Compact, SF6-insulated switchgear for indoor and outdoor high-voltage applications with superior safety.

Voltage: Up to 500kV
Type: GIS, SF6 insulated
Application: Urban substations, confined spaces

40.5kV AC Metal-clad Switchgear

Robust medium-voltage switchgear with arc-resistant design for industrial and utility applications.

Voltage: 40.5kV
Type: Metal-clad, AIS
Application: Power plants, factories

24kV AC Metal-enclosed Switchgear

Reliable switchgear solution for distribution networks with modular design and easy maintenance.

Voltage: 24kV
Type: Metal-enclosed, MV
Application: Commercial, industrial

Dry-Type Power Transformers

Cast resin transformers ideal for indoor installations where fire safety and low maintenance are critical.

Type: Dry-type, Cast Resin
Rating: Up to 35kV
Application: Buildings, data centers

Special Application Transformers

Custom-built furnace, rectifier, and traction transformers for mining, metallurgy, and rail systems.

Types: Furnace, Rectifier, Traction
Custom: Design & manufacturing
Application: Mining, Industry

Mobile Substations

Fully integrated, transportable substations for emergency power, construction, and remote operations.

Voltage: 35–230kV
Type: Containerized, Portable
Application: Emergency, Temporary

Hybrid GIS (HGIS/PASS)

Hybrid switchgear combining GIS reliability with AIS cost-efficiency for optimized substation design.

Voltage: 72.5–550kV
Type: Hybrid, Compact
Application: Space-constrained sites

View All Products on Official Site

Why Choose CTSS?

As a leading China power transformer manufacturer, we deliver unmatched quality, innovation, and global support.

Certified Quality

ISO, IEC, and international standards compliance. Proven performance in global projects including Congo and Côte d'Ivoire mines.

End-to-End Solutions

From R&D to manufacturing, installation, and after-sales service. We deliver complete power systems, not just components.

Global Reach

Supplied to Africa, Asia, Middle East, and South America. Trusted by utilities, mines, and industrial complexes worldwide.

Frequently Asked Questions

What types of transformers do you manufacture?

We produce oil-immersed power and distribution transformers, dry-type (cast resin) transformers, auto-transformers, furnace transformers, rectifier transformers, and special application transformers.

Do you supply GIS and switchgear?

Yes, we offer Gas Insulated Switchgear (GIS), Air Insulated Switchgear (AIS), Hybrid GIS (HGIS/PASS), and metal-clad/enclosed switchgear up to 500kV.

Can you customize transformers?

Absolutely. We provide custom design and manufacturing for special voltage, cooling, insulation, and environmental requirements.

Where is your company located?

Our headquarters and manufacturing facilities are in China, serving clients globally through direct sales and partners.

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Ultra-High Voltage Power Transformers