Certified Transformers, Substations & Switchgear | TSTY

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Reliable Power Infrastructure—— Around in the World

Reliable Power Infrastructure—— Around in the World

Globally deployed solutions for grids, industry, and new energy

For over 30 years, TSTY has delivered mission-critical power systems across more than 100 countries—from national transmission networks to remote mining operations and renewable energy hubs. 
We partner with EPCs, utilities, and industrial operators to ensure power continuity, wherever your project is located. 

All Products

Products

6kV Dry-Type Transformer

Proprietary 7-step core ensures safe, efficient, and maintenance-free indoor distribution.

6kV Dry-Type Transformer
Amorphous Alloy Dry-Transformer

Flame-retardant design cuts no-load losses by 60–70% for data centers and sustainable infrastructure.

Amorphous Alloy Dry-Transformer
On-load Tap Changer (OLTC) Power Transformer

Integrated on-load tap changer ensures uninterrupted power quality and grid stability for critical infrastructure.

On-load Tap Changer (OLTC) Power Transformer
Amorphous Alloy Oil Immersed Distribution Transformer

Ultra-low no-load loss distribution transformer utilizing iron-based amorphous metal core technology for 24/7 base-load and high-efficiency applications.

Amorphous Alloy Oil Immersed Distribution Transformer
220kV Oil-immersed Power Transformer

Verified short-circuit withstand and low noise for national grid and heavy industry.

220kV Oil-immersed Power Transformer
110kV Oil Power Transformer

High-reliability, zero-leakage 110kV power transformer with advanced short-circuit withstand capability for utility and renewable energy applications.

110kV Oil Power Transformer
20kV Oil-immersed Distribution Transformer

High-efficiency, IEC/CE/GOST certified oil-immersed transformer for 20kV medium-voltage distribution networks

20kV Oil-immersed Distribution Transformer
35kV Oil-immersed Distribution Transformer

Medium-high voltage, IEC/GOST certified oil-immersed transformer for 33/35kV regional grid interconnection and industrial power supply

35kV Oil-immersed Distribution Transformer
6-11kV Oil Distribution Transformer

Low-loss, UL/CE/CCC certified oil-immersed transformer for 6kV to 11kV grid distribution

6-11kV Oil Distribution Transformer
66kV Oil-immersed Transformer

High-capacity, IEC/GOST certified oil-immersed transformer for 63/66kV sub-transmission and heavy industrial power supply

66kV Oil-immersed Transformer
Validated in the World’s Most Demanding Operating Conditions

Validated in the World’s Most Demanding Operating Conditions

TSTY equipment is specified where failure is not an option. Key validation points:
01 Certifications accepted globally Certifications accepted globally
02 Extreme-environment operation Extreme-environment operation
03 Long-life design Long-life design
04 Full technical enablement Full technical enablement
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Certifications accepted globally

IEC, IEEE, UL, CE, GOST/EAC — test reports recognized in 100+ countries

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Extreme-environment operation

Proven at –40°C (Arctic & Mongolia), 70°C ambient (Middle East), 4,500 m elevation (African highlands, Mongolian mines), and high-salt coastal zones

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Long-life design

100% copper windings, optional amorphous alloy cores, vacuum pressure impregnation for >30-year service life

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Full technical enablement

Regional spare parts, 24/7 engineering support, and complete documentation (CAD/BIM, type-test reports, IEC datasheets)

All products listed meet these baseline requirements. Specific ratings and certifications vary by model.

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