DYH.DYH was established in 1972. The enterprise occupies a total area of 380,000 square meters with a building area of 186,000 square meters. The group currently employs over 1,800 staff members. Operating under a group management model with headquarters in Pulan District, Dalian, the company serves as a manufacturing base for transmission and distribution equipment including high- and medium-voltage instrument transformers, insulated busbars, and high-voltage electrical apparatus. Subsidiaries are established in Shanghai, Xiamen, and Dalian Economic and Technological Development Zone. Additionally, a joint venture with Spain's Atagi produces and markets current and voltage transformers rated at 110kV and above. Since its inception, the company has consistently engaged in the R&D, manufacturing, and marketing of instrument transformers, emerging as a leading enterprise in China's instrument transformer manufacturing industry. Its primary products include: gas-insulated switchgear transformers, transformers for electric locomotives and EMUs, electronic instrument transformers, outdoor transformers, ring main unit transformers, and insulated busbars.
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