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SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Ref: ART-B22-D70, ART-B22-D125, ART-B22-D175, ART-B22-D300
N°97.M4.99.000.0, N°97.M7.99.000.0, N°97.M8.99.000.0, N° 97.M4.99.003.0; N° 97.M4.99.004.0; N° 97.M4.99.006.0; N° 97.M7.99.003.0; N° 97.M7.99.004.0; N° 97.M7.99.006.0;
N° 97.M8.99.003.0; N° 97.M8.99.004.0; N° 97.M8.99.006.0; N° 97.N3.99.000.0; N° 97.N3.99.003.0; N° 97.N3.99.004.0, N° 97.N3.99.006.0
Applications
●MV/LV substations on LV side: Transformer Condition
Monitoring
● Power metering: current measurement for active power
calculation
● Building sub-metering: energy efficiency monitoring,
consumption analysis and cost allocation
● Power quality monitoring: electrical loads and distribution
system equipment
● Fault Detection, Isolation and Repair
(FDIR): isolate the site of the fault
● Remote Terminal Units (RTU)
● Phasor Measurement Units (PMU).
Standards
● IEC 61010-1: 2010; IEC 61010-2-32: 2012
●1) IEC 61869-1: 2007; IEC 61869-2: 2012
●1) IEC 61869-6: 2016; IEC 61869-10: 2017
● UL 61010-1: 2012.
Features
● Rated insulation voltage 1000 V Cat III PD2
● Accuracy Class 0.5 (IEC 61869-2)
● Protection degree IP57
●⌀ 70, ⌀ 125, ⌀ 175, ⌀ 300 mm sensing aperture
● 1.5 m output cable (other lengths available see page 8)
● Ambient temperature −40 °C … +80 °C
● Very flexible and thin coil: 6.1 mm
● Slot for attaching the loop on the primary with a cable tie
●⌀ 2 mm hole to pass a security seal tampering
● An innovative patented clasp drastically reduces the
positioning error near the closing
● Internal shield for enhanced measurement accuracy at low
primary currents.
Advantages
● Thin, flexible, and light weight solution
● Very low positioning error
● Quick, non-intrusive and easy setup
● A single sensor for a large current range without overload
● Less influenced by external fields
● Adaptable for a large range of cable diameters.
Flexible clip-around Rogowski coil for the electronic measurement of AC current with galvanic separation between
the primary circuit (power) and the secondary circuit (measurement). The patented Perfect Loop Technology
dramatically reduces both the error due to the position of the measured conductor within the aperture, and the error
due to the proximity of external conductors.
Accuracy Class 0.5
A B C D E F Ø
mm 56.0 18.9 33.7 2.0 1500.0 6.1
IP
VS+
VS-
dip/dt
New
Class 0.5
70 - 125
175 - 300
Note: 1) Performance standards: ART-B22 only partially fulfills these standards as a Rogowski coil has fundamental
differences compared to current transformers.
LEMcity
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SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Absolute maximum ratings
Parameter Symbol Unit Value
Maximum secondary voltage US max V30
Maximum primary conductor temperature TB max °C 105
Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum ratings for extended periods may degrade reliability.
UL 61010-1: Ratings and assumptions of certification
File # E330077 , Vol.D1
Standards
● UL 61010-1, Third Edition, May 11, 2012, Revised April 29 2016
● CAN/CSA-C22.2 No. 61010-1-12, 3rd Edition, Revision dated April 29 2016
● IEC 61010-2-032: 2012 (Third Edition), UL 61010-2-032 (IEC 61010-2-032:2012).
Ratings
Rated insulation voltage AC 1000 V, 50/60 Hz, CAT III, 2000 A.
Engineering conditions of acceptability
When installed in an end-product, consideration must be given to the following:
- ART series has been investigated as Type B current sensors according IEC 61010-2-032 3rd ed.
- The devices have been evaluated for overvoltage category III and pollution degree 2 environment use only.
For ART series, the need for the following shall be considered in the end-product:
- Markings and documentation that comply with Clause 5.
- The following tests shall be performed in the end-product evaluation: Dielectric Strength.
- The unit is considered acceptable for use in a max ambient of 80°C for ART series.
- A suitable enclosure shall be provided in the end-use application.
-Theterminalshavenotbeenevaluatedforfieldwiring.
- Primary conductor or busbar temperature should never exceed 100°C.
LEMcity‘
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SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Insulation coordination
Parameter Symbol Unit Value Comment
RMS voltage for AC insulation test, 50 Hz, 1 min UdkV 7.4
Impulse withstand voltage 1.2/50 µs ÛWkV 12.8
Partial discharge RMS test voltage (qm < 10 pC) UtkV 1.65 According to IEC 60664-1
Clearance (pri. - sec.) dCI mm > 16 Shortest distance through
air
Creepage distance (pri. - sec.) dCp mm > 16 Shortest path along device
body
Case material ---V0 According to UL 94
CTI 600
Application example -1000 V CAT III
PD2
Reinforced insulation
according to IEC 61010-1
Application example -1000 V CAT IV
PD2
Basic insulation according
to IEC 61010-1
Environmental and mechanical characteristics
Parameter Symbol Unit Min Typ Max Comment
Ambient operating temperature TA°C −40 80
Ambient storage temperature TS°C −40 80
Relative humidity (non-condensing) RH % 0 90
Altitude above sea level m2000
Mass ⌀ 70 mg124 Cable length: 1.5 m
Mass ⌀ 125 mg130 Cable length: 1.5 m
Mass ⌀ 175 mg138 Cable length: 1.5 m
Mass ⌀ 300 mg155 Cable length: 1.5 m
: LEMcity‘
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18January2018/version 6 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Electrical data ART-B22-D70
At TA = 25 °C, RL = 10 kΩ, unless otherwise noted.
Parameter Symbol Unit Min Value Max Comment
Rated primary current IPr ANot applicable 1)
Rated short-time thermal current Ith kA 300 @ 50 Hz 2)
Rated transformation ratio kra kA/V 44.44 @ 50 Hz
Rated frequency frHz 50/60
Parameter Symbol Unit Min Typ Max Comment
Secondary voltage USmV 22.5 @ 50 Hz, IP = 1 kA
Mutual inductance MnH 71.98
Temperature coefficient of MTCM ppm/K ±30
Frequency bandwidth (−3 dB) BW kHz 420 3) Cable length: 1.5 m
Phase displacement 4) @ 50/60 Hz Δφ°0.004 3)
Coil inductance LSµH 180
Coil resistance RSΩ56
Ratio error (centered) ε%−0.5 0.5 Class 0.5 accuracy according to
IEC 61869-2
Ratio error (all positions) ε%−0.75 0.75 5) Including positioning error
Linearity error εL%None
Influence of external current εI ext % 0 ±0.2 ±0.4 6)
Notes: 1) The Rogowski coil can measure any primary current as there is no saturation effect.
2) Not tested given that in the worst case (load = 0 Ohm i.e. short circuit on the output) the peak dissipated power
remains low (< 2 Watts)
3) Frequency bandwidth and phase shift modeling schematic can be provided on request.
4) Referring to the main phase offset of 90 ° (a Rogowski coil is a derivative current transducer)
5) Considering a primary conductor of at least ⌀ 15 mm, perpendicular and in contact with the Rogowski coil.
6) Considering an external conductor of at least ⌀ 15 mm the same current level than internal conductor, perpendicular
and in contact with the Rogowski coil.
Page 5/12
18January2018/version 6 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Electrical data ART-B22-D125
At TA = 25 °C, RL = 10 kΩ, unless otherwise noted.
Parameter Symbol Unit Min Value Max Comment
Rated primary current IPr ANot applicable 1)
Rated short-time thermal current Ith kA 300 @ 50 Hz 2)
Rated transformation ratio kra kA/V 44.44 @ 50 Hz
Rated frequency frHz 50/60
Parameter Symbol Unit Min Typ Max Comment
Secondary voltage USmV 22.5 @ 50 Hz, IP = 1 kA
Mutual inductance MnH 72.14
Temperature coefficient of MTCM ppm/K ±30
Frequency bandwidth (−3 dB) BW kHz 373 3) Cable length: 1.5 m
Phase displacement 4) @ 50/60 Hz Δφ°0.004 3)
Coil inductance LSµH 258
Coil resistance RSΩ81
Ratio error (centered) ε%−0.5 0.5 Class 0.5 accuracy according to
IEC 61869-2
Ratio error (all positions) ε%−0.75 0.75 5) Including positioning error
Linearity error εL%None
Influence of external current εI ext % 0 ±0.2 ±0.4 6)
Notes: 1) The Rogowski coil can measure any primary current as there is no saturation effect.
2) Not tested given that in the worst case (load = 0 Ohm i.e. short circuit on the output) the peak dissipated power
remains low (< 2 Watts)
3) Frequency bandwidth and phase shift modeling schematic can be provided on request.
4) Referring to the main phase offset of 90 ° (a Rogowski coil is a derivative current transducer)
5) Considering a primary conductor of at least ⌀ 15 mm, perpendicular and in contact with the Rogowski coil.
6) Considering an external conductor of at least ⌀ 15 mm the same current level than internal conductor, perpendicular
and in contact with the Rogowski coil.
Page 6/12
18January2018/version 6 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Electrical data ART-B22-D175
At TA = 25 °C, RL = 10 kΩ, unless otherwise noted.
Parameter Symbol Unit Min Value Max Comment
Rated primary current IPr ANot applicable 1)
Rated short-time thermal current Ith kA 300 @ 50 Hz 2)
Rated transformation ratio kra kA/V 44.44 @ 50 Hz
Rated frequency frHz 50/60
Parameter Symbol Unit Min Typ Max Comment
Secondary voltage USmV 22.5 @ 50 Hz, IP = 1 kA
Mutual inductance MnH 72.31
Temperature coefficient of MTCM ppm/K ±30
Frequency bandwidth (−3 dB) BW kHz 350 3) Cable length: 1.5 m
Phase displacement 4) @ 50/60 Hz Δφ°0.004 3)
Coil inductance LSµH 343
Coil resistance RSΩ105
Ratio error (centered) ε%−0.5 0.5 Class 0.5 accuracy according to
IEC 61869-2
Ratio error (all positions) ε%−0.75 0.75 5) Including positioning error
Linearity error εL%None
Influence of external current εI ext % 0 ±0.2 ±0.4 6)
Notes: 1) The Rogowski coil can measure any primary current as there is no saturation effect.
2) Not tested given that in the worst case (load = 0 Ohm i.e. short circuit on the output) the peak dissipated power
remains low (< 2 Watts)
3) Frequency bandwidth and phase shift modeling schematic can be provided on request.
4) Referring to the main phase offset of 90 ° (a Rogowski coil is a derivative current transducer)
5) Considering a primary conductor of at least ⌀ 15 mm, perpendicular and in contact with the Rogowski coil.
6) Considering an external conductor of at least ⌀ 15 mm the same current level than internal conductor, perpendicular
and in contact with the Rogowski coil.
Page 7/12
18January2018/version 6 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com
SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Electrical data ART-B22-D300
At TA = 25 °C, RL = 10 kΩ, unless otherwise noted.
Parameter Symbol Unit Min Value Max Comment
Rated primary current IPr ANot applicable 1)
Rated short-time thermal current Ith kA 300 @ 50 Hz 2)
Rated transformation ratio kra kA/V 44.44 @ 50 Hz
Rated frequency frHz 50/60
Parameter Symbol Unit Min Typ Max Comment
Secondary voltage USmV 22.5 @ 50 Hz, IP = 1 kA
Mutual inductance MnH 72.84
Temperature coefficient of MTCM ppm/K ±30
Frequency bandwidth (−3 dB) BW kHz 300 3) Cable length: 1.5 m
Phase displacement 4) @ 50/60 Hz Δφ°0.004 3)
Coil inductance LSµH 566
Coil resistance RSΩ170
Ratio error (centered) ε%−0.5 0.5 Class 0.5 accuracy according to
IEC 61869-2
Ratio error (all positions) ε%−0.75 0.75 5) Including positioning error
Linearity error εL%None
Influence of external current εI ext % 0 ±0.2 ±0.4 6)
Notes: 1) The Rogowski coil can measure any primary current as there is no saturation effect.
2) Not tested given that in the worst case (load = 0 Ohm i.e. short circuit on the output) the peak dissipated power
remains low (< 2 Watts)
3) Frequency bandwidth and phase shift modeling schematic can be provided on request.
4) Referring to the main phase offset of 90 ° (a Rogowski coil is a derivative current transducer)
5) Considering a primary conductor of at least ⌀ 15 mm, perpendicular and in contact with the Rogowski coil.
6) Considering an external conductor of at least ⌀ 15 mm the same current level than internal conductor, perpendicular
and in contact with the Rogowski coil.
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SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Definition of typical, minimum and maximum values
Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values
shown in “typical” graphs.
On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower
limits and a probability for measured values to lie within this interval.
Unless otherwise stated (e.g. “100 % tested”), the LEM definition for such intervals designated with “min” and “max” is that the
probability for values of samples to lie in this interval is 99.73 %.
For a normal (Gaussian) distribution, this corresponds to an interval between −3 sigma and +3 sigma. If “typical” values are not
obviously mean or average values, those values are defined to delimit intervals with a probability of 68.27 %, corresponding to
an interval between −sigma and +sigma for a normal distribution.
Typical, minimum and maximum values are determined during the initial characterization of the product.
Accuracy class according to IEC 61869-2
-1.5
-1.25
-1
-0.75
-0.5
-0.25
0
0.25
0.5
0.75
1
1.25
1.5
5 20 100 120
Current error (%)
% of IPr
Conductor centered
Class 0.5
Accuracy class limit of IEC 61869-2
Accuracy class limit of ART-B22 Rogowski
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SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Rated transformation ratio kra
Ratio of kra to the actual secondary voltage.
Ratio error ε
The current ratio error, expressed as a percentage, is defined
by the formula:
Where:
kra: is the rated transformation ratio
IP: is the actual primary current
US: is the actual secondary voltage when IP is
flowing
Phase displacement Δφ
The Δφ is the difference in phase between the primary current
and the ideal secondary voltage phasors. The direction of
the phasors being that the angle is 90 ° (leading) for an ideal
Rogowski coil.
The phase displacement is said to be positive when the
secondary voltage phasor leads the primary current phasor.
Linearity error εL
The linearity error εL is the maximum positive or negative
difference between the measured points and the linear
regression line, expressed as a percentage of IPr.
Rated short-time thermal current Ith
Maximum value of the primary current which the Rogowski will
withstand for a specified short time without suffering harmful
effects.
Performance parameters definition
ε = × 100 %
k
ra
U
s
−
I
P
I
P
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SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
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ART-B22-DXXX series: name and codification
ART-B22-DXXX
Other cable lengths available
Product name Length (m) Mass (g)
ART-B22-D70/SP3 3192
ART-B22-D70/SP4 4.5 259
ART-B22-D70/SP6 6327
ART-B22-D125/SP3 3198
ART-B22-D125/SP4 4.5 265
ART-B22-D125/SP6 6333
ART-B22-D175/SP3 3206
ART-B22-D175/SP4 4.5 273
ART-B22-D175/SP6 6341
ART-B22-D300/SP3 3222
ART-B22-D300/SP4 4.5 290
ART-B22-D300/SP6 6357
Family:
Rogowski coil
Output signal:
22.5: mV/kA
Aperture
D70: ⌀ 70 mm
D125: ⌀ 125 mm
D175: ⌀ 175 mm
D300: ⌀ 300 mm
LE Mcity
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SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
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 www.lem.com.
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 with 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.
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SPLIT CORE ROGOWSKI COIL
ART Series
LEM City answers the demand for an accurate, reliable and easy to install energy sensor for future Smart Cities.
www.lemcity.com
Mechanical characteristics
● General tolerance ±1 mm
● Output cable length See table page 8
or drawing above
● Termination 2 stripped wires
● Cable tie maximum effort 50 N
Remarks
●US = VS+ − VS- is positive when an increasing primary
current di/dt flows in the direction of the arrow (see fig. 1).
● Due to low positioning error (εP), the device does not need
to be physically fastened around the primary conductor.
Should the device be secured, make sure no mechanical
stress is applied to the coil itself.
● This product is not intended for outdoor use.
● Installation of the transducer must be done unless
otherwise specified on the datasheet, according to LEM
Transducer Generic Mounting Rules. Please refer to
LEM document N°ANE120504 available on our Web site:
Products/Product Documentation.
Connection
Dimensions (in mm)
IP
diP/dt
VS+
VS-
IP
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