Nrc High Current Monitoring Rogowski Coil Current Sensor

• Customization: Available
• Type: Rogowski
• Output Signal Type: Analog Output
• Model NO.: NRC-200
• Production Process: Integration
• Material: Metal
• Accuracy Grade: 0.5G
• Application: All Electronic, Electrical, Electric Related Cases
• IP Rating: IP67
• Certification: CE
• Customized: Customized
• Window Size: 100, 150, 200mm
• Reference Rated Current: 1000A, 3000A, 6000A
• Weight: Approx 140-170g
• Terminal: Cold Pressed Terminal, BNC...
• Coil Resistance: From 260-390Ω
• Current Range(RMS): 0.5-100ka AC
• Ratio: Calibrated 85mv/Ka@50Hz; 50mv/Ka@50Hz
• Read Accuracy: Calibrated <0.5% (Central Position, 25ºC)
• Temperature Drift: Uncalibrated 200ppm/ºC
• 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
• Transport Package: Poly Bag, Standard Export Carton
• Specification: Ø 8 Flexible Rogowski coil
• Trademark: Meatrol
• Origin: Shanghai
• HS Code: 8504311000
• Production Capacity: 50000PCS/Month

Product Description

 

NRC
Ø8 Flexible Rogowski coil fixed by cable ties

1. High linearity from 1A to 100kA
2. Wide dynamic range
3. Very useful with large size or awkward shaped conductors or in places with limited access
4. No danger from open-circuited secondary
5. Not damaged by large overloads
6. Non-intrusive, no power drawn from the main
7. Measurement uniformity at any position of the conductor inside the coil
8. Excellent degree of rejection to the external current conductor

Feature

NRC is a flexible current transducer based on Rogowski principle, particularly suitable for measurement in combination with portable devices. NRC 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 comfortable solution for current measurement and can be used in a number of cases where traditional current transducer is not the adequate solution.
NRC 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 are 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.
 

Advantage • Calibrated to 0.5%   • 8mm section easy to install • Easy to fixed on bus-bar and cable by cable ties • Lower zero drift down to 0.1mV Related Products S1 D1 S10 SW DA01 DA05 ME631 ME435 ME440

Applications • Measuring devices, lab instrumentation • Power monitoring & control systems  • Harmonics and transients monitoring • Very high current monitoring

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		NRC-100	NRC-150	NRC-200
Coil length		395mm	525mm	665mm
Window size		100mm	150mm	200mm
Reference Rated current		1000A	3000A	6000A
Coil Resistance		260 (+/-10) Ω	320 (+/-10) Ω	390 (+/-10) Ω
Weight		Approx. 140g	Approx. 150g	Approx. 170g
Ratio	Calibrated	85mV/kA@50Hz 102mV/kA@60Hz		50mV/kA@50Hz 60mV/kA@60Hz
	Uncalibrated	110mV/kA@50Hz 132mV/kA@60Hz
Read Accuracy		Calibrated <0.5% (central position, 25ºC) Uncalibrated < 5% tolerance (central position, 25ºC)
Maximum current measurable		100kA
Coil Section		8mm
Lead length		2meter
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
For other requirements, please contact us for customization.

Position sensitivity

Conductor Position	Typical Error (%)
Adjacent to the center of coil	<0.5%
Adjacent to the inside of coil	<1%

Materials
 

Coil & cable	Thermoplastic rubber flame retardant UL 94 V-0 rated
Couplings	PC, ABS UL 94 V-0 rated
Color(coil)	Orange, Yellow, Red, Green, Blue
Shielded	100% coil, 100% output cable

Safety
 

Certifications	CE marked
	Complies with LVD EN 61010-1:2010 EMC EN 61326-1:2013
	IP67
Voltage insulation	Coil: 2000V
	Signal cable:1000V
Safety	1000V CATIII ,600V CATIV

 

Dimension's tolerance:
A,B,C,F:±5mm, D:±0.2mm,E:±10mm

Dimensions(mm)	NRC-100	NRC-150	NRC-200
Windows size A	135	165	210
Windows size B	100	150	200
Coil O.D.	151	181	226
Coil section	8
Lead Cable Total Length	2000
Coil length	395	525	665

More Special Rogowski coil+Integrator for fault indicator
Rogowski coil NZ special for  high temperature electric furnace
Rogowski Coil Sensor for Lightning current

Safety and warning notes
In order to guarantee safe operation of the transducer and to be able to make proper use of all features and functions, please read these instructions thoroughly! Safe operation can only be guaranteed if the transducer is used for the purpose, it has been designed for and within the limits of the technical specifications. Ensure you get up-to-date technical information that can be found in the latest associated datasheet under Rogowski website.


Caution! Risk of danger
Ignoring the warnings can lead to serious injury and/or cause damage!
The electric measuring transducer may only be installed and put into operation by qualified personnel that have received an appropriate training, The corresponding national regulations shall be observed during installation and operation of the transducer and any electrical conductor. The transducer shall be used in electric/electronic equipment the respect to applicable standards and safety requirements and in accordance with all the related systems and components manufacturers' operating instructions.


Caution! Risk of electrical shock
When operating the transducer, certain parts of the module may carry hazardous live voltage (e.g., Primary conductor). The user shall ensure to take all measures necessary to protect against electrical shock. The transducer is a build-in device containing conducting parts that shall not be accessible after installation. A protective enclosure or additional insulation barrier may be necessary. Installation and maintenance shall be done with the main power supply disconnected except if there are no hazardous live parts in or in close proximity to the system and if the applicable national regulations are fully observed.

Safe and trouble-free operation of this transducer can only be guaranteed if transport, storage and installation are carried out correctly and operation and maintenance are carried out with care.


Caution! Risk of electrical shock
Do not apply around or remove from uninsulated hazardous live conductors which may result in electric shock, electric burn or arc flash.


WARING!
Do not stress the coil by applying any kind of mechanical force (transport, storage pressure, tight bending.) which will dramatically degrade the device's accuracy.



MEATROL Rogowski coil Model No. Definition:

Description	Connector model	Window size B	Signal cable length E	Ratio		Model No.
				Calibrated (mV/kA@50Hz)	Uncalibrated (mV/kA@50Hz)
Ø 6 Mini type with fixing ribbon ties	MRC	16	2m	50 (60mV/kA@60Hz)	60 (72mV/kA@60Hz)	MRC-16-2m-50
		24				MRC-24-2m-50
		36				MRC-36-2m-50
Ø8 Rotate bayonet type Easy installation with fixing ribbon ties	NRC	100	2m	85	105	NRC-100-2m-85
		150		85		NRC-150-2m-85
		200		50		NRC-200-2m-50
Ø12 High Voltage 36kV	D-SRC	50	2m	________	60 (72mV/kA@60Hz)	D-SRC-50-2m-60
		100				D-SRC-100-2m-60
		150				D-SRC-150-2m-60
Ø12 High Sensitivity	SRC	50	2m	333	360	SRC-50-2m-333
		100				SRC-100-2m-333
		150				SRC-150-2m-333
Ø 6 precision type	TRC	16	2m	50	60	TRC-16-2m-50
		24				TRC-24-2m-50
		36				TRC-36-2m-50
Ø8 Snap-in type Easy installation	ZRC	50	2m	100 / 85 / 50	105	ZRC-50-2m-85
		100				ZRC-100-2m-85
		150				ZRC-150-2m-85
Ø8 Spiral joint Suitable for long term stable installation	Y-FCT	B50	2m	85	110	Y-FCT-B50-2m-85
		B100		85		Y-FCT-B100-2m-85
		B150		85		Y-FCT-B150-2m-85
		B240		50		Y-FCT-B240-2m-50
Ø8 High Frequency	H-FCT	B50	2m	1.2 / 6.8 / 10		H-FCT-B50-2m-10
		B95				H-FCT-95-2m-10