1. Principles of Flexible Measurement Technology
The core technology of flexible current clamps is the Rogowski Coil, a non-contact measurement method based on electromagnetic induction. Unlike traditional iron-core clamps, Rogowski Coils use non-ferromagnetic materials wound uniformly into a ring structure, eliminating magnetic hysteresis and saturation. When a conductor passes through the coil’s center, the output generates a voltage signal proportional to the current’s rate of change (di/dt), which is then converted to the original current waveform via an integrator circuit. This design delivers three breakthrough advantages:
- Ultra-wide measurement range: Accurately measures currents from milliampere-level leakage to 10,000A, covering ranges unattainable by traditional clamps;
- Distortion resistance: Maintains ±2%±5dgt precision in high-distortion environments (e.g., variable-frequency drives, arc welding);
- Physical flexibility: An ultra-slim Φ8mm coil threads through dense wiring or narrow gaps, solving “blind-spot measurements” like wall-mounted transformers.
2. Technical Features of FR1050 Series
The FUZRR FR1050 series sets industry standards through modular design tailored for diverse scenarios. Key model specifications:
Table: FR1050 Series Model Comparison
| Model | FR1050A | FR1050 | FR1050E |
|---|---|---|---|
| Coil Length | 470mm | 470mm | 950mm |
| Coil ID | Φ150mm | Φ150mm | Φ300mm |
| Resolution | 0.1A | 1mA | 1mA |
| Applications | High-current cables | Leakage current | Extra-large cables/busbars |
Beyond current measurement, the series integrates AC/DC voltage testing (AC 0–750V / DC 0–1000V) with ±1.5%rdg accuracy. Its data management system stores 500 datasets with backlit LCD review and “FULL” alerts when memory is saturated.
Safety compliance meets CAT III 600V standards, with insulation resistance >100MΩ (1kV), enabling safe operation near 60kV insulated or 35kV bare conductors. Powered by 3×AAA batteries, it operates reliably down to -10°C.
3. Industrial Applications
The FR1050 series proves indispensable in complex industrial settings:
- Power systems: Detects transformer core grounding currents to diagnose insulation degradation. At one substation, FR1050E identified 3.2mA leakage in concealed busbars, preventing a blackout;
- Variable-frequency drives: Where harmonic distortion causes >15% error in traditional CTs, FR1050 maintains ±2% accuracy with its wide-frequency response;
- Renewable energy: Its non-contact design eliminates potential difference risks during DC-side PV array measurements, backed by 1000VDC capability.
4. Technological Gap vs. Traditional Clamps
The FR1050 series redefines measurement benchmarks:
Table: Comparison with Traditional Clamps
| Feature | Traditional Iron-core Clamps | FR1050 Flexible Clamps |
|---|---|---|
| Principle | Electromagnetic (saturation-prone) | Rogowski Coil (saturation-free) |
| Max Aperture | ≤80mm (heavy) | Φ300mm (lightweight) |
| Weight | >1kg (Φ150mm) | 220g (incl. batteries) |
| Flexibility | Rigid | 360° bendable |
| Frequency Range | 50-60Hz (typical) | 0.1Hz–1MHz |
This technological leap slashes labor needs by 67%—e.g., railway pantograph current inspections now require 2 person-hours versus 6 with traditional clamps.
5. Future Evolution
Flexible measurement technology is advancing toward intelligence and system integration:
- Signal processing: Next-gen products will adopt 24-bit ADCs, boosting sampling from 2 to 10 samples/sec to capture μs transients;
- IoT connectivity: Bluetooth 5.0 will enable real-time diagnostics of breaker operations via SCADA systems;
- Material innovation: Nanocrystalline ribbon coils may reduce thermal drift by 50% and extend operating range to -25°C–70°C.
The FUZRR FR1050 series merges Rogowski technology with industrial adaptability, solving critical challenges like distorted-signal measurement, confined-space access, and wide dynamic ranges. Weighing 220g with Φ300mm aperture and CAT III safety, it redefines electrical measurement efficiency. As smart grids and power IoT evolve, flexible measurement will progressively replace traditional CTs as core sensors for condition monitoring.
