UL Certificated Transfromer For USA

TSTY is dedicated to providing a comprehensive range of power equipment solutions for the U.S. market. Our products strictly adhere to ANSI C57.12.20, IEEE C57.12.00, DOE 2016, NEMA, and RUS standards, and hold authoritative certifications such as UL, cUL, and CSA. Our product portfolio spans the entire value chain from high-voltage transmission to end-user distribution, featuring pole-mounted transformers, pad-mounted transformers, power transformers, renewable energy package substations, BESS (Battery Energy Storage System) transformers, and complete equipment sets such as high- and low-voltage switchgear.

Designed specifically for North America and regions utilizing American-standard distribution systems, pole-mounted transformers serve as core equipment in overhead distribution networks. Featuring a compact design, they can be mounted directly onto utility poles, thereby saving ground space and reducing the need for additional infrastructure investment. The product range covers capacities from 10 kVA to 333 kVA (customizable up to 500 kVA), with high-voltage ratings ranging from 7.2 kV / 12.47 kV / 12.7 kV / 13.8 kV up to 33 kV.

TSTY offers single-phase and three-phase pad-mounted transformers featuring a compact, tamper-resistant design suitable for ground-level installation in residential, commercial, and rural power grids. These units utilize a modular compartment layout with high- and low-voltage cable termination compartments arranged side-by-side within the tank, ensuring stable, long-term operation under demanding outdoor conditions. They are available with capacities up to 5,000 kVA and voltage ratings up to 34.5 kV.

Power transformers are large-capacity units used in substations to facilitate voltage transformation between transmission and distribution networks. TSTY offers 115kV, 138kV, and 69kV oil-immersed power transformers; characterized by high reliability, excellent heat dissipation, and cost-effectiveness, these products are widely used in substations, renewable energy power plants, and large-scale industrial load applications.

As a power equipment manufacturer with over 30 years of experience in international markets, TSTY has established a comprehensive certification system and product portfolio for the U.S. market:

1. Comprehensive UL Certification Coverage

TSTY’s pole-mounted transformers, single-phase pad-mounted transformers, and three-phase pad-mounted transformers have all obtained UL/cUL certification.

2. Rapid Delivery Times

Leveraging 5G-enabled digital manufacturing equipment, TSTY achieves an annual production capacity of 25,000 transformers and 10,000 sets of high- and low-voltage equipment. Standard products have a lead time of just 15–20 days, while urgent orders can be ready for port shipment in as little as 67 hours.

3. Full Compliance with IEEE/ANSI Standards

Products strictly adhere to core standards such as IEEE C57.12.20 (pole-mounted), IEEE C57.12.34 (three-phase pad-mounted), and IEEE C57.12.25/C57.12.38 (single-phase pad-mounted).

4. DOE 2016 Energy Efficiency Compliance

All products meet the mandatory energy efficiency standards set by the U.S. Department of Energy (DOE).

5. Extensive North American Market Experience

TSTY products are widely exported to markets across North, Central, and South America, and the company has frequently showcased its offerings at premier North American industry events such as DistribuTECH and IEEE PES.