The STF Series Split-Core AC Current Transducer is designed to measure AC currents from 100 A to 1000 A and convert the measured current into an isolated standard DC output signal. Available output options include 0–20 mA, 4–20 mA, 0–5 V and 1–5 V, supporting direct integration with PLCs, monitoring instruments, data-acquisition systems and industrial control equipment.
Its split-core construction enables installation around existing cables without disconnecting the primary conductor, making it particularly suitable for retrofit projects and systems where shutdown time must be minimized. With ±0.5% accuracy, high-voltage isolation and a wide operating temperature range, the series provides dependable current monitoring for power supplies, motor drives, frequency converters, welding equipment, rectifier systems, railway equipment and industrial automation applications.
| Parameter | Specification |
|---|---|
| Measurement principle | AC current transducer |
| Rated input current | 100 A / 200 A / 400 A / 600 A / 1000 A AC |
| Output options | 0–20 mA DC; 4–20 mA DC; 0–5 V DC; 1–5 V DC |
| Accuracy | ±0.5% |
| Linearity | <0.5% |
| Operating frequency | 50 Hz; 400 Hz version available |
| Response time | <0.35 s |
| Supply voltage | 15–24 V DC, ±5% |
| Current consumption | 30 mA + output current |
| Isolation voltage | 5 kV RMS, 50 Hz for 1 minute between primary and secondary circuits |
| Aperture | Ø40 mm |
| Core structure | Split-core |
| Operating temperature | −25°C to +85°C |
| Output signal | Standard isolated DC current or voltage signal |