Flexible Rogowski Coil Current Transformer for High Current Monitoring
This flexible Rogowski coil current transformer is an AC current sensor designed for permanent installation. It combines a thin, flexible, snap-on Rogowski sensing coil with a signal conditioner, providing accurate true RMS current measurement. The product offers high linearity and a wide dynamic range. The flexible split-core design allows quick installation without interrupting the circuit, and adapts to large or irregularly shaped conductors. There is no secondary open-circuit hazard, and it has strong anti-overload capability. Non-invasive measurement does not draw power from the main circuit. The sensor provides excellent measurement consistency regardless of the conductor's position inside the coil, with superior rejection of external current interference. It is widely used in high-current monitoring, power quality monitoring, harmonic analysis, power monitoring, and relay protection.
Features
- High linearity from 1A to 100kA
- Wide dynamic range
- Very useful with large size or awkward shaped conductors or in places with limited access
- No danger from open-circuited secondary
- Not damaged by large overloads
- Non-intrusive,no power drawn from the main
- Measurement uniformity at any position of the conductor inside the coil
- Excellent degree of rejection to the external current conductor
Applications
- Measuring devices,lab instrumentation
- Power monitoring&control systems
- DC ripple measurement
- Harmonics and transients monitoring
- Power meter,Powe ranalyzer sensor
Specification
| TRANSDUCER | ||
| Coil length: | 210/350/420/510/600/800mm | |
| Inner diameter: | 60/103/125/155/180/245mm (±10%) | |
| Coil cross section: | 6.5±0.2 mm/8±0.2 mm/10±0.2 mm | |
| Fastening: | bayonetholder | |
| Material: | thermoplastic UL94-V0 | |
| coil: black, red, yellow, blue (other color could be customized) | ||
| Color: | closing unit: black | |
| CONNECTION CABLE | ||
| Type: | cable (with 3-wire terminal) | |
| cable + BNC/O scilloscope Interface | ||
| Length: | 3000 mm (standard), other length could be customized. | |
| Material: | Xy23/0.1 Ts/2C+A+B | |
| Color: | black orange | |
| ELECTRICAL CHARACTERISTICS | ||
| Output level (RMS): | 40mV/1000A @50Hz | |
| 80mV/1000A @50Hz | ||
| 100mV/1000A @50Hz | ||
| Accuracy: | class 1.0 (coil must be calibrated with amplifier/integrator load impedance) | |
| Linearity (10% to 100% of range): | ±0.1% of reading | |
| Frequency range/Bandwidth: | approx 10Hz to 10MHz | |
| Phase shift: | 90° | |
| Conductor position sensitivity: | ±2% Maximum | |
| Influence of external field: | ±2% Maximum | |
| ENVIRONMENTAL CONDITIONS | ||
| Operating temperature: | from -20℃ to +75℃ | |
| Storage temperature: | from -30℃ to +75℃ (suggest normal temperature ) | |
| Safety | ||
| Working voltage(max): | 1000Vrms CATIII | |
| 600Vrms CATIV | ||
| Hipot test | 3000Vrms @50/60Hz 1min. | |
Dimension
| Dimensions(mm) | ZRC-210 | ZRC-350 | ZRC-420 | ZRC-510 | ZRC-600 | ZRC-800 |
| A Window size((mm)±10% | 60mm | 103mm | 125mm | 155mm | 180mm | 245mm |
| B Rogowski Coil O.D.(mm)±10% | 73mm | 120mm | 141mm | 171mm | 201mm | 266mm |
| C Rogowski Coil Diameter | 6.5mm | 8mm | 8mm | 8mm | 10.5mm | 10.5mm |
| D Wire Lead Diameter | 4mm | 4mm | 4mm | 4mm | 4mm | 4mm |
Here are a variety of specifications for you to choose from.
FAQ
Q: What is the difference between a Rogowski coil and a traditional current transformer (CT)?
A: A Rogowski coil uses an air core structure with no magnetic core. It has no core saturation issues, offering extremely high linearity (from 1A to 100kA) and a very wide dynamic range. The Rogowski coil also presents no high-voltage hazard when the secondary is open, with strong anti-overload capability. Traditional CTs have an iron core and suffer from saturation issues at both low and high currents, with a limited dynamic range. Secondary open circuits can produce dangerous high voltages.
Q: What are the advantages of a flexible Rogowski coil in high-current measurement?
A: The flexible Rogowski coil is lightweight and bendable. It can be wrapped around large or irregularly shaped conductors, making it suitable for space-constrained installations. Compared to traditional rigid CTs, the flexible design offers easier installation, especially suitable for retrofit projects and applications where power cannot be turned off.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.