High-Voltage Power Extraction Device

It is suitable for use as a through‑core current transformer in high‑voltage cable busbars at 6 kV, 10 kV, 35 kV, 110 kV, and 220 kV voltage levels. This series of current‑sensing power supplies employs electromagnetic arc technology and high‑frequency isolated DC/DC conversion, complemented by power‑state monitoring and battery charge–discharge management. It provides a stable operating power supply to smart electronic devices, relay protection equipment, communication systems, and other equipment, while also enabling the charging of backup batteries or energy‑storage capacitors. It meets stringent safety‑power requirements under various harsh conditions, such as large‑current surges and abrupt load changes in the power grid.

Outdoor Waterproof Current Transformer

Applied in power distribution and technology upgrade projects, this product features an open‑type design that eliminates the need for on‑site disassembly or power outages. It offers standard output ratings of 5 A, 1 A, mA, and V, with three communication options: wired RS‑485 serial communication using the MODBUS RTU protocol, supporting a transmission distance of up to 1,200 meters; wireless RF communication for data transmission and acquisition; and analog output, providing DC signals of 0–5 V, 0–10 V, 4–20 mA, and 0–20 mA.

Zero-flux current transformer

A microcurrent sensor specially developed for online insulation monitoring of high-voltage electrical equipment. It is used in online monitoring of substation equipment, online monitoring of transformer core grounding, online insulation monitoring of high-voltage bushings, and online insulation monitoring of metal oxide surge arresters, among other applications. The sensor can accurately measure power-frequency currents ranging from 100 μA to 700 mA and exhibits excellent temperature stability and strong resistance to electromagnetic interference. Featuring a robust, waterproof, and corrosion‑resistant metal housing with epoxy resin encapsulation, it is suitable for long-term outdoor operation. Available with aperture sizes from 12 to 65 mm, and input ranges from 0.05 mA to 0.7 A can be customized.