Primary–Secondary Integrated Current Transformer (for China Southern Power Grid)

Hebei Zhongkaimingtai Power Technology Co., Ltd. is a high-tech enterprise registered in China's Xiong'an New Area, and for more than four decades it has remained dedicated to the transformer‑current‑transformer (CT) field. From slitting silicon steel strips and winding iron cores to annealing, as well as R&D, testing, and manufacturing of CTs, our company boasts a complete industrial chain. We primarily produce high‑ and low‑voltage current transformers, residual current transformers, and high‑frequency CTs specially designed for ring main units and gas‑insulated switchgear, while also offering a wide range of silicon steel, R‑type iron cores, and ultra‑microcrystalline iron cores for external sale. We win the market with superior quality and capture customers through competitive pricing; our expertise gives us confidence. Zhongkaimingtai—trusting you.

Open-type current transformer

The LK-10 series open‑type current transformers are suitable for current measurement, power extraction, and microprocessor‑based protection in complete switchgear systems operating at 10 kV and below. Featuring a compact footprint, lightweight construction, and an open‑type design that facilitates installation, these devices are widely employed in compact, fully insulated ring‑main units.

Silicon steel core

All types of iron cores manufactured by our company—such as toroidal silicon steel cores, R‑type silicon steel cores, and CD‑type silicon steel cores—are crafted using genuine, virgin materials. From strip slitting and winding to annealing, varnish impregnation, and notching, every production step is rigorously controlled to ensure product excellence. In the magnetic core industry, we are committed to delivering only premium-quality products. We strive to serve the electrical sector with the most competitive prices, the highest‑quality products, and the most professional service.