Zhejiang Tuanjie Electrical Equipment Co., Ltd., established in 1986 in Yueqing, Zhejiang province (China’s “Electric City”), manufactures instrument transformers including current transformers (CT), voltage transformers (PT), dry-type/oil-immersed transformers (0.5–35 kV), as well as panel meters and switching power supplies; the company holds ISO 9001, CE, IEC, and CCC certifications and exports to regions including Southeast Asia.