Mô tả
Rogowski Coil MFC140 (7 mm cross section) is a flexible current transducer based on Rogowski principle. MFC140 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.
MFC140 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.
MFC140 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.
TECHNICAL SPECIFICATIONS
Transducer
Coil length: 15 … 50 cm
Cord diameter: 7.2 ±0.2 mm
Fastening: bayonet holder
Weight: from 150 to 500 g
Jacket material: Polyphenylene and thermoplastic elastomer
Electrical charateristics for model without integrator
Nominal output rate: 100 mV / kA @ 50 Hz (RMS values)
Max measurable current: 600 A with 15 … 28 cm coil length
2500 A with 29 … 41 cm coil length
5000 A with 42 … 50 cm coil length
Coil resistance: 170 … 690 Ω
Accuracy: Class 1-A1 according to IEC 61869-10
Frequency: 50/60 Hz
Overvoltage category: 1000 V CAT III, 600 V CAT IV
Pollution degree: 3
Insulation test voltage: 7400 VRMS / 5 s
Electrical charateristics for model with integrator
Power voltage: 4 … 26 VDC
Max consumption: 5 mADC
Nominal output rate: 333 mV / FS (RMS values)
FS changes according to the model: 200, 250, 600, 1000 A
Positioning error: Better than ±1% of reading
Frequency: 50/60 Hz
Overvoltage category: 1000 V CAT III, 600 V CAT IV
Pollution degree: 3
Insulation test voltage: 7400 VRMS / 5 s
Connection cable for model with integrator
Type: 5 x 22 AWG shielded
Length: 3 m. Other lengths on request: 5, 7, 10, 15 m
Connection cable for model without integrator
Type: 3 x 22 AWG shielded
Length: 3 m. Other lengths on request: 5, 7, 10, 15 m
Enviromental conditions
Protection degree: IP68
Operating temperature: -40 … +75°C up to 2500 A with 15 … 41 cm coil length
-40 … +60°C up to 5000 A with 42 … 50 cm coil length
Standard compliance
IEC standards: IEC 61010-1, IEC 61010-2-032, IEC 60529, IEC 61869-10
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