Tieno Enterprise Company

1970— Origins in Electrical Trade

Tieno Enterprise was originally founded as Yotak Trading Co., Ltd. in Taipei, Taiwan, specializing in the import of high and low voltage electrical equipment.
During the 1980s and 1990s, our founder Mr. Li-Te Tai secured exclusive agency rights for several leading European brands, including Magrini Galileo (now part of Schneider Electric), F&G, and SIBA from Germany.

1987
Tieno pioneered the import of RMU systems from Germany’s F&G to Taiwan in 1987. The systems have operated flawlessly for over 30 years at Taipei Veterans General Hospital. Their proven reliability also led to adoption by Taiwan’s Nuclear Power Plants No. 1, 2, and 3, solidifying Tieno’s reputation in high-voltage distribution.

1989— Officially Founded
Mr. Li-Te Tai formally established Tieno Enterprise Co., Ltd., laying the foundation for brand development and long-term growth.

1993— Strategic Partnership with VEI (Italy)

Tieno signed an exclusive agency agreement with VEI Electric Systems of Italy, securing rights to sell, assemble, and manufacture VEI products in China, Hong Kong, and Taiwan.
All products proudly carry the label:
“Manufactured under licence of VEI Electric Systems.”

This agreement marked the beginning of a long-term strategic partnership. Tieno received complete access to 22 pages of official contracts, over 1,000 original drawings, and technical documentation (see images below).

1994 — Zhuhai Factory Established

Tieno established its own wholly-owned manufacturing facility in Zhuhai, China, achieving 100% self-sufficient production and assembly.
With full access to VEI’s ISARC and ISARC-P technical know-how, we successfully transitioned from an agent to a design and manufacturing enterprise.

1995 — Type Test Certification

Our proprietary ISARC LBS passed official type testing, confirming the product's quality and compliance with industry standards.

2013 — Entry into the EU Market
ISARC LBS successfully passed the 25kA EU type test, enabling Tieno to expand into the European high-voltage switchgear market.

2015— Second Factory in Taichung, Taiwan
We opened a second factory in Taichung, Taiwan, focused on producing ISARC LBS, VCB, FS, and RMU systems for both local supply and exports to Southeast Asia, the Middle East, and Europe.

2019 — New Zhuhai Jinwan Facility Completed
To meet growing demand, Tieno built a new facility in Zhuhai Jinwan, spanning over 10,000 m², with a total construction area of 11,150 m² (including basement). This move significantly enhanced our production capacity.

2025— RMU Passes National Type Test
In May 2025, our Ring Main Unit (RMU) passed type testing at Xi’an High Voltage Research Institute, marking another leap forward in high-voltage product certification and innovation.

Ready for the Future

With over 40 years of industry experience and annual sales exceeding 10,000 units, Tieno continues to innovate and expand. We are fully prepared to scale production and elevate service quality to meet the evolving needs of our global clients.