MV Flexible Rogowski Coils

Description

The Powertek MV Flexible Rogowski Coil is designed for accurate and non-intrusive measurement of AC current in medium-voltage electrical systems. Its flexible, air-core construction allows the coil to be installed around conductors where conventional current transformers may be difficult to fit due to space, conductor size or installation constraints. Designed for medium-voltage applications up to 12 kV, the Rogowski coil provides Class 0.5 accuracy in accordance with IEC 61869-10, with low phase displacement and minimal measurement error caused by conductor position. The air-core design also eliminates magnetic saturation and provides a wide dynamic range, making the sensor suitable for applications ranging from relatively low currents to several thousand amperes.

The coil is available in different window sizes to accommodate a range of conductor and busbar dimensions. The MV Series incorporates an integrated endcap in which both ends of the flexible sensing loop meet within a single housing, providing a compact and straightforward connection arrangement. With IP67 protection and UV-resistant construction, the MV Flexible Rogowski Coil is suitable for demanding indoor and outdoor environments. Its low weight and flexible construction make it particularly useful where the installation of conventional CTs would be impractical.

The Rogowski coil produces a voltage proportional to the rate of change of current and therefore requires an electronic integrator to provide phase compensation and frequency equalisation. Integrators can be supplied separately to suit the measurement system.

Highlights

Medium-voltage current measurement up to 12 kV
Accuracy Class 0.5 in accordance with IEC 61869-10
Wide measurement range from 5 A to 6,000 A
Flexible, lightweight air-core Rogowski coil construction
IP67 protection with UV-resistant construction for outdoor applications
Low sensitivity to conductor position within the coil
Low influence from external magnetic fields and nearby conductors
Low phase displacement of less than 0.5°
Excellent linearity with full-scale error of ±0.5%
Operating temperature from -40°C to +80°C
Available in multiple coil window sizes
Suitable for MV switchgear, busducts, smart grids and power quality monitoring
MV rogowski coil Series available with an integrated endcap for a compact connection arrangement

Specifications:

ELECTRICAL CHARACTERISTICS

Power voltage: 4 ... 26 VDC
Max consumption: 5 mADC
Nominal output rate: 333 mV / FS (RMS values)
FS changes according to the model: 1, 2, 5 kA
Positioning error: Better than ±1% of reading
Frequency: 50/60 Hz
Overvoltage category: 1000 V CAT III, 600 V CAT IV
Pollution degree: 2
Insulation test voltage: 7400 VRMS / 5s

COIL

Coil length:25 ... 300 cm
Sensor internal diameter:5 ... 94 cm
Cord diameter:8.3 ±0.2 mm
Jacket material:Thermoplastic polyurethane UL94-V0
Fastening:Bayonet holder
Weight:150 ... 500 g

CONNECTION CABLE FOR MODEL

Type:5 x 22 AWG shielded
Length:3 m. Other lengths on request: 5, 7, 10, 15 m

ENVIRONMENTAL CONDITIONS

Protection degree:IP67 or IP68 according to the model (not evaluated by UL)
Operating temperature:-30 ... +80°C
Storage temperature:-40 ... +80°C

Applications:

Medium-voltage switchgear current measurement
Busduct and busbar current monitoring
Energy monitoring and load analysis
Power quality monitoring
Smart grid and AMI systems
Predictive maintenance and fault detection
MV system diagnostics
Industrial power distribution
Protection and monitoring systems
Outdoor MV current measurement

Ordering Code Info
Order Code	Output	Coil Length (cm)	Coil diameter (cm)	Cable Length (m)
3118.0001	333mV	40	~11	3
3118.0002	333mV	60	~17.5	3
3118.0002	333mV	90	~27	3

Options:

MFC150/F
MFC150-Ul/F (UL 2808 Certified)

Datasheet:

CE marked