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Flexible Rogowski coil Fixed
- High linearity from 10A to 500kA
- Wide dynamic range
- Very useful with large size or awkward shaped conductors or in places with limited access
- 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
- Thanks to its light weight, it can be changed on the measured conductor
- Totally shielded
Description
ESCT-RC series are flexible current transducers based on Rogowski principle, particularly suitable for measurement in combination with portable devices. ESCT-RC coils are available in different sizes and can be supplied according to consumer’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 wheretraditional current transducer is not the adequate solution. ESCT-RC series provided with a shield against the influence of external magneticfields, therefore it grants a stable measurement from low currents to hundred of kA. The Rogowski coils must be connected to an electronic integrator for 90° phase shift compensation and frequency equalization. Our portable and panelme ters 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.
Feature
- Very thin coil diameter
- calibrated to 0.5%
- Measurement uniformity at any position of the conducor inside the coil
- Excellent degree of rejection to the external current conductor
- Delivered already calibrated
Applications
- Measuring devices, lab instrumentation
- Power monitoring & control systems
- DC ripple measurement
- Harmonics and transients monitoring
- Power meter, Power analyzer sensor
Related Products
- Integrator S10, S9.1 D1, S1, DA01/05, 01/03
Benefits
- Due to its structure, flexible Rogowski coils allows to embrace conductors or grouped cables, which are large and difficult to reach, without any hazard.
- The coil output gives a low voltage signal, therefore ther is no danger from open-circuited secondary. This makes Rogowski transducers extremely suitable for temporary measurements, for example in combination with portable analysers
- Unlike traditional current transformer with magnetic core, the Rogowski coil is a non-intrusive transducer. Since it has no hard core, it draws no power from the main circuit carrying the current to be measured.
What is a Rogowski Coil
Rogowski coils have been used for the detection and measurement of eletric 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 proportionnal to the current. By using precision winding techniques, especially developped 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 exemple, 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 considerables advantages :
- Widedynamic 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 mai circuit carrying the current to be measured.
- They are also light weighted and in some applicaitons 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 particulary useful for measuring ripple currents for example in battery charging systems.
Specifications
| Transducer | |
|---|---|
| Coil length: | from 20 cm to 1000 cm |
| Coil diameter: | Ø8, Ø6, Ø12 mm |
| Fastening: | bayonet holder |
| Weight: | 150 g |
| Material: | thermoplastic UL94-V0 |
| Output level (RMS): | ESCT-RC Series: 50 mV/kA @50Hz, 85 mV/kA @50Hz / 80mV/kA @60Hz, 100mV/kA @60Hz ESCT-SRC Series: 120 mV/kA @50Hz, 240 mV/kA @50Hz / 200V/kA @60Hz, 333mV/kA @60Hz |
| Current Range: | 10A to 500 kA |
| Output sensitivity tolerance: | ±5% (not calibrated) |
| Output sensitivity tolerance: | ±5%, 25°C (calibrated) |
| Position error: | ±1 |
| Coil resistance: | from 70 to 900 Ω |
| Positioning error: | better than ±1% of reading (with 15 mm diameter cable) |
| Frequency range: | approx 40 Hz to 20 kHz |
| Working voltage: | 1000 VRMS CAT III / 600 VRMS CAT IV pollution degree 2 |
| Test voltage: | 7400 VRMS / 1 min |
| Connection Cable | |
| Type: | 2 x 0.15 mm + shield |
| Length: | on request |
| Environmental Conditions | |
| Operating temperature: | from -30°C to +80°C |
| Storage temperature: | from -40°C to +80°C |
| Protection degree: | IP68 Type A B D IP65 Type E (ESCT-SRC Series) IP54 Type C (ESCT-RC16/24/36) |
| Standards Compliance | |
| Safety: | EN61010-1, EN61010-031, EN61010-2-031, EN61010-2-032 |
Model Table
| Coil code | Window Size (mm) | Coil Lenght (mm) | Lead Lenght (mm) | Ratio | Type No. | Remark | |
|---|---|---|---|---|---|---|---|
| A | B | ||||||
| ESCT-RC60 | 60 | 50 | 200 | 2000 | 85 mV/kA @50Hz | A | 1. Different coil color Black, Yellow, Red, Green, Blue (MOQ required) 2. Other cable lenght longer than standard (2m), up to 15m 3. Other coil lenght than these listed, up to 1000cm. 4. Product code: ESCT-RC-xxx (window size) |
| ESCT-RC100 | 135 | 100 | 395 | 2000 | 85 mV/kA @50Hz | B | |
| ESCT-RC105 | 105 | 100 | 350 | 2000 | 85 mV/kA @50Hz | A | |
| ESCT-RC150 | 165 | 150 | 525 | 2000 | 85 mV/kA @50Hz | B | |
| ESCT-RC200 | 240 | 200 | 665 | 2000 | 85 mV/kA @50Hz | B | |
| ESCT-RC240 | 245 | 240 | 800 | 2000 | 85 mV/kA @50Hz | A | |
| ESCT-RC16 | 22 | 16 | 80 | 2000 | 50 mV/kA @50Hz | C | |
| ESCT-RC24 | 27,5 | 24 | 97 | 2000 | 50 mV/kA @50Hz | C | |
| ESCT-RC36 | 36 | 37 | 130 | 2000 | 50 mV/kA @50Hz | C | |
| ESCT-RC45 | 65 | 45 | 205 | 2000 | 85 mV/kA @50Hz | D | |
| ESCT-SRC100 | 115 | 100 | 380 | 2000 | 240 mV/kA @60Hz | E | |
| ESCT-SRC150 | 175 | 150 | 555 | 2000 | 240 mV/kA @60Hz | E | |
| ESCT-SRC300 | 315 | 300 | 1000 | 2000 | 240 mV/kA @60Hz | E | |
Selection Reference
ESCT-RC60-2M-85-B
- RC: < 120 mV/kA
- SRC: ≥ 120 mV/kA
- Cable length (Customizable)
- Ratio: 85 mV/kA (Customizable)
- Color (R: Red, B: Blue, O: Orange, Y: Yellow, G: Green)
ESCT-RC60-2M-85-B means window size at 60 mm, cable length 2 meters, rated ratio 85 mV/kA, and blue color.
All the parameters can be customized, please contact for more details.
Position sensitivity
| Conductor Position | Typical Error (%) |
|---|---|
| Adjacent to the clip together mechanism | < 0.5% |
| Adjacent to the inside coil edge | < 0.8% |
| Adjacent to the opposite clip | < 1% |
| Conductor Position | Typical Error (%) |
|---|---|
| Adjacent to the clip together mechanism | < 0.5% |
| Adjacent to the inside coil edge | < 0.8% |
| Adjacent to the opposite clip | < 1% |
| Conductor Position | Typical Error (%) |
|---|---|
| Adjacent to the clip together mechanism | < 0.5% |
| Adjacent to the inside coil edge | < 0.8% |
| Adjacent to the opposite clip | < 1% |
| Conductor Position | Typical Error (%) |
|---|---|
| Adjacent to the clip together mechanism | < 0.5% |
| Adjacent to the inside coil edge | < 0.8% |
| Adjacent to the opposite clip | < 1% |
| Conductor Position | Typical Error (%) |
|---|---|
| Adjacent to the clip together mechanism | < 0.5% |
| Adjacent to the inside coil edge | < 0.8% |
| Adjacent to the opposite clip | < 1% |
Dimensions
Dimension tolerance A, B, C, F: ±5 mm, D: ±0.2 mm, E: ±10 mm
Type A: RC60, RC105, RC240
| Type A: | RC60 | RC105 | RC240 |
|---|---|---|---|
| A. Window Size A | 60 | 105 | 245 |
| B. Window Size B | 50 | 100 | 240 |
| C. Coil O.D. | 66 | 121 | 261 |
| D. Coil Section | 8 | ||
| E. Lead Cable Total Length | 2000 | ||
| F. Coil Length | 200 | 350 | 800 |
| Ratio (Calibrated) | 80 mV/kA @50Hz, 85 mV/kA @50Hz, 100 mV/kA @50Hz | ||
| Bandwidth | 1 Hz to 50 kHz (-3dB) |
| Type B: | RC100 | RC150 | RC200 | RC300 |
|---|---|---|---|---|
| A. Window Size A | 135 | 165 | 210 | 325 |
| B. Window Size B | 100 | 150 | 200 | 300 |
| C. Coil O.D. | 151 | 181 | 226 | 340 |
| D. Coil Section | 8 | |||
| E. Lead Cable Total Length | 2000 | |||
| F. Coil Length | 395 | 525 | 665 | 1050 |
| Ratio (Calibrated) | 80 mV/kA @50Hz, 85 mV/kA @50Hz, 100 mV/kA @50Hz | |||
| Bandwidth | 1 Hz to 50 kHz (-3dB) |
| Type C: | RC16 | RC24 | RC36 |
|---|---|---|---|
| A. Window Size A | 22 | 27.5 | 36 |
| B. Window 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 |
| Ratio (Calibrated) | 50 mV/kA @50Hz | ||
| Bandwidth | 1 Hz to 20 kHz (-3dB) |
| Type D: | RC45 |
|---|---|
| A. Window Size A | 65 |
| B. Window Size B | 45 |
| C. Coil O.D. | 81 |
| D. Coil Section | 8 |
| E. Lead Cable Total Length | 2000 |
| F. Coil Length | 205 |
| Ratio (Calibrated) | 50 mV/kA @50Hz, 85 mV/kA @50Hz, 100 mV/kA @50Hz |
| Bandwidth | 1 Hz to 50 kHz (-3dB) |
| Type E: | SRC100 | SRC150 | SRC300 |
|---|---|---|---|
| A. Window Size A | 115 | 175 | 315 |
| B. Window Size B | 100 | 150 | 300 |
| C. Coil O.D. | 139 | 199 | 399 |
| D. Coil Section | 12 | ||
| E. Lead Cable Total Length | 2000 | ||
| F. Coil Length | 380 | 555 | 1000 |
| Ratio (Calibrated) | 240 mV/kA @60Hz | ||
| Bandwidth | 1 Hz to 10 kHz (-3dB) |
