Technical consultant
Susan
MRC
Ø6 Flexible Rogowski coil fixed by cable ties
- High linearity from 1A to 1000A
- 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
Feature
MRC is a MINI flexible current transducer based on Rogowski principle, particularly suitable for measurement in combination with portable devices. MRC coils are available in different sizes and can be supplied according to customer's design, therefore they can be used in all those applications, in which traditional transducers are not fitting due to its size and/or weight.
Due to its specific features, flexible Rogowski coil is an extremely confortable solution for current measurement and can be used in a number of cases where traditional current transducer is not the adequate solution.
MRC coil is provided with a shield against the influence of external magnetic fields, therefore it grants a stable measurement from low currents to hundreds of kA. The Rogowski coils must be connected to an electronic integrator for 90° phase shift compensation and frequency equalization. Our DIN-RAIL and panel meters can interface Rogowski coils directly without the need of the external integrators. This is an advantage because there is no external boxes or any power supply with consequent ease of use. The particular features of the Rogowski coils combined with the extremely flexible input programming of our portable meters, allow to carry out measurement by all applications.
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Advantage
• Calibrated to 0.5%
• 6mm section make more stable
• Easy to fixed on bus-bar or cable by cable ties
• Very competitive price
Related Products
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Applications
- Measuring devices, lab instrumentation
- Power monitoring & control systems
- DC ripple measurement
- Harmonics and transients monitoring
- Power meter,Power analyzer sensor
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What is a Rogowski coil?
Rogowski coils have been used for the detection and measurement of electric currents for decades. They are based on a simple principle: an "air-cored" coil is placed around the conductor in a toroidal fashion and the magnetic field produced by the current induces a voltage in the coil. The voltage output is proportional to the rate of change of current. This voltage is integrated, thus producing an output proportional to the current.
By using precision winding techniques, especially developed for the purpose, the coils are manufactured so that their output is not influenced by the position of the conductor within the toroid, and to reject interference from external magnetic fields caused, for example, from nearby conductors.Basically, a Rogowski coil current measuring system consists of a combination of a coil and conditioning electronics.Rogowski coil current transducers are used for the AC measurement.
They can be used in similar circumstances to current transformers but for many applications they have considerable advantages:
• Wide dynamic range
• High linearity.
• Very useful with large size or awkward shaped conductors or in places with limited access. Thanks to the structure without hard core, the coil can be easily manufactured according to the application or to the available space.
• Unlike traditional current transducers, there is no danger from open-circuited secondaries.
• They cannot be damaged by large overloads.
• They are non-intrusive. They draw no power from the main circuit carrying the current to be measured.
• They are also light weighted and in some applications are light enough to be suspended on the conductor being measured.
The transducer does not measure direct currents but, unlike a current transformer, it can carry out accurate measurements of AC component even if there is a large superimposed DC component, since there is no iron core causing saturation. This feature is particularly useful for measuring ripple currents for example in battery charging systems.
Specification
| MODEL |
MRC-16 |
MRC-24 |
MRC-36 |
| Coil length |
80mm |
97mm |
130mm |
| Window size |
16mm |
24mm |
36mm |
Reference
Rated current |
100A |
300A |
600A |
| Coil Resistance |
55 (+/-10) Ω |
65 (+/-10) Ω |
80 (+/-10) Ω |
| Weight |
Approx 100g |
Approx 102g |
Approx 105g |
| Maximum current measurable |
100kA |
| Coil Section |
6mm |
| Lead length |
2meter |
| Output (di/dt) |
Uncalibrated |
60mV/kA@50Hz 72mV/kA@60Hz |
| Calibrated |
50mV/kA@50Hz 60mV/kA@60Hz |
| Read Accuracy |
Calibrated <0.5% (central position, 25ºC)
Uncalibrated < 5% tolerance (central position, 25ºC) |
| Temperature |
Uncalibrated 200ppm/C |
| Calibrated 300ppm/C |
| Position Error |
±1% maximum |
Output on 0A
(zero drift) |
≤0.05mV |
| Phase error |
≤0.5° |
| Linearity |
±0.2% of reading |
| Bandwidth |
1Hz to 100kHz(-3dB) |
| Operating temperature |
-30ºC to 80ºC |
| Storage temperature |
-40ºC to 90ºC |
| Other requirements, please contact us to OEM. |
Position sensitivity
| Conductor Position |
Typical Error(%) |
| Adjacent to the clip together mechanism |
<0.5% |
| Adjacent to the opposite clip |
<1% |
Materials
| Coil & cable |
Thermoplastic rubber
flame retardant UL 94 V-0 rated |
| Couplings |
PA6 UL 94 V-O rated |
| Color(coil) |
Orange |
| Shielded |
100% coil, 100% output cable |
Safety
| Certifications |
CE marked |
Complies with
LVD EN 61010-1:2010
EMC EN 61326-1:2013 |
| IP68 |
| Voltage insulation |
Coil: 1000V |
| Signal cable:1000V |
| Safety |
1000V CATIII ,600V CATIV |
Dimensions tolerance:
A,B,C,F:±1mm, D:±0.2mm,E:±10mm
| Dimensions(mm) |
MRC-16 |
MRC-24 |
MRC-36 |
| A.Windows size A |
22 |
27.5 |
36 |
| B.Windows size B |
16 |
24 |
37 |
| C.Coil O.D. |
34 |
39.5 |
48 |
| D.Coil section |
6 |
| E.Lead Cable Total Length |
2000 |
| F:Coil length |
80 |
97 |
130 |
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