HJIC-C21 series AC current transducer is a measurement module that converts the measured current into a DC current or voltage output in proportion to the primary current using the Hall effect and open-loop measurement principle. The primary and secondary sides are highly insulated. It has the characteristics of high accuracy, high linearity, high integration, small size, simple structure, long-term stable operation and adaptability to various working environments. It is widely used in the system control and detection of electrical equipment in the power, petroleum, coal mining, chemical, railway, communication, building automation and other industries.
The HJIC-C21 series is an alternating‑current transmitter that uses Hall‑effect, open‑loop measurement to convert primary current into proportional DC voltage or current output. It offers high accuracy, linearity, and strong overload capability while keeping primary and secondary sides fully insulated.
This manual includes product introduction, selection information, electrical parameters, mechanical and wiring diagrams, output characteristic curves, and detailed safety instructions for installation and operation. This manual is written in Chinese.
| Rated measurement current | 100–1000 A |
|---|---|
| Overload current | 3000 A |
| Output voltage (DC) | 0‑5 V, 0‑10 V |
| Output current (DC) | 4‑20 mA, 0‑20 mA |
| Linearity error | 0.5 % |
| Response time | ≤300 ms |
| Frequency range | 40–200 Hz |
| Power consumption | 25 mA |
| Load resistance (voltage output) | >5000 Ω |
| Insulation voltage (50 Hz) | 5 kV |
The transmitter can tolerate an overload current of up to 3000 A.
It can provide 4‑20 mA or 0‑20 mA current output, and 0‑5 V or 0‑10 V voltage output.
Wiring must be done by qualified engineers, avoiding exposed conductive parts, ensuring correct connections, and keeping the installation environment free of conductive dust and corrosive substances.