MFC150-UI
4Pages

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Catalog excerpts

MFC150-UI - 1

Rogowski Coils Rogowski Coils UL 2808 Ø8 mm flexible Rogowski coil • • • • • • • • • Four available models: for indoor or outdoor use, with or without integrator Suitable to measure currents from mA to several kA High linearity Very useful with large size or awkward shaped conductors or in places with limited access Not damaged by overloads Non-intrusive, no power drawn from the main Thanks to its light weight, it can be changed on the measured conductor Totally shielded UL 2808 certified » Strong points • • • Very thin coil diameter: down to 8 mm Bayonet connector including possibility to regulate calibration Measurement uniformity at any position of the conductor inside the coil Delivered already calibrated Excellent degree of rejection to the external current conductor » General description MFC150-UI is a flexible current transducer based on Rogowski principle, particularly suitable for measurement in combination with portable devices. MFC150-UI 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. MFC150-UI coil is provided with a shield against the influence of external magnetic fields, therefore it grants a stable measurement from low currents to several kA. MFC150-UI can be also provided with built-in integrator, without needing of external devices for 90° phase shift compensation and frequency equalization. This is an advantage because there is no external box 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. 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 there 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. The absence of magnetic core grants a wide frequency response. This make MFC150-UI particularly suitable for measurement of harmonic content and transients. Measuring devices, lab instrumentation Power monitoring & control systems DC ripple measurement Harmonics and transients monitoring Very high

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MFC150-UI - 2

Rogowski Coils » Available models MODEL Built-in INTEGRATOR » 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...

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MFC150-UI - 3

Rogowski Coils » Specifications COIL Coil length: Sensor internal diameter: Cord diameter: Jacket material: Fastening: Weight: 30 ... 300 cm 7 ... 94 cm 8.3 ±0.2 mm Polyphenylene and thermoplastic elastomer Bayonet holder 150 ... 500 g ELECTRICAL CHARACTERISTICS FOR MODEL WITHOUT INTEGRATOR 120 mV / kA @ 60 Hz (RMS values) 100 mV / kA @ 50 Hz (RMS values) 2 kA @ 50/60 Hz with 30 ... 42 cm coil length 5 kA @ 50/60 Hz with 43 ... 300 cm coil length 70 ... 900 Ω Better than ±1% of reading 50/60 Hz 600 V CAT IV, Service Entrance 2, Controlled Environment for indoor use model 3, Uncontrolled...

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MFC150-UI - 4

Rogowski Coils CABLE DETAIL Internal Length [cm] diameter [cm] CABLE DETAIL Internal Length [cm] diameter [cm] MFC150-UI/F with BUILT-IN INTEGRATOR - (333mV/1kA OUTPUT VALUE) 40 MFC150-UI/F with BUILT-IN INTEGRATOR - (333mV/2kA OUTPUT VALUE) 3604.0002.0001 MFC150-UI/F with BUILT-IN INTEGRATOR - (333mV/5kA OUTPUT VALUE) 3604.0009.0001 ONLY MODEL WITHOUT INTEGRATOR OPTIONS AVAILABLE ONLY ON REQUEST ( SUBJECT TO MOQ) Other coil length than those listed above, up to 300cm Cable length different from standard (3m): 5, 7, 10, 15 m Calibrated for customer device (input impedance value of device to...

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