AI-P1A
1 AMPERE OUTPUT ROGOWSKI
COIL SIGNAL CONDITIONERThe Rogowski coil integrator AI-P1A complements LEM’s flexible clip-around coil ART and ARU families to provide a
1 A output instantaneous signal to replace conventional current transformer with dynamic extended range. AI-P1A isDIN rail mounted.

Features

Applications• Accuracy Class 0.5 (IEC 61869-2) (1)• Linearity error ≤ 0.10 %• Protection degree IP2X
• 35 mm DIN rail mounted• Push-in terminals• 1 A instantaneous output signals• 6 selectable sensitivities depending on Rogowski coil:• MV/LV substations: transformer condition monitoring• Power measurement: current measurement for••22.5, 70, 80, 85, 100, 120 mV/kA at 50 Hz
12 selectable ranges: 100, 200, 300, 400, 500, 600,800, 1000, 1500, 2000, 4000, 5000 A
Ambient operating temperature −25 ...+70 °C.

Advantages• Compact design for DIN rail assembly• High accuracy Class 0.5 (IEC 61869-2)• Setup by user via Select / Edit buttons• Clear status indication via bi-color led• Over-temperature protection function.

••••

active power calculation
Building sub-metering: energy efficiency monitoring,consumption analysis and cost allocation
Power quality monitoring: electrical loads anddistribution system equipment
Fault Detection, Isolation and Repair (FDIR)
Remote Terminal Units (RTU).

Standards• Safety: IEC 61010-1: 2017
• EMC: IEC 61326-1: 2012
• UL 61010-1: Rev. 2016
• CAN/CSA C22.2 61010-1-12: Rev. 2016.
Options• Cross Power Plug-in: side contacts to stack up to 3
Integrator modules and use only one power supply

Application Domains• Industrial• Smart grid.

Note: 1) AI-P1A integrators fulfill accuracy class limits defined by IEC 61869-2 even if this standard does not apply to Rogowski integrators.
See detailed curve of accuracy given in this document.
N° 97.T7.99.000.0
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LEM reserves the right to carry out modifications on its transducers, in order to improve them

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1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
Material and Insulation coordination
Parameter

Symbol

Unit

Value

Comment

RMS voltage for AC insulation test,50 Hz, 5 seconds

UdkV

1.5Between power supply 24 V andRogowski connection + output

Flammability according to UL94--V0-

Material--

Polyamide

Symbol

Unit

Value

Ambient operating temperature (1)TA°C−25 ...+70

Ambient storage temperature

TA st°C−40 ...+85

Relative humidity (non-condensing)

RH%

95

Altitude above sea level

-m

2000

Massm

g

100

Symbol

Unit

Value

General dimensional tolerance

-mm

±1

Dimensions-mm³

100 × 78 × 23.1

Mounting on DIN rail (IEC 60715)--

TH35-7.5
TH35-15

Symbol

Unit

Value

24 V DC Supply voltage

UC DCV+16.8 ...+31.2

Current consumption (2)ICmAmax. 350

V5

Halogen free

Environmental characteristics
Parameter

Comment

Mechanical characteristics
Parameter

Comment

Power Supply
Parameter

Auxiliary supply through micro-USB

Comment@ 24 V with 1 A output

For product configuration only

Notes: 1) The over-temperature protection may limit the output current in certain conditions of use.		 Please refer to the derating curve on page 5.
2)
Please refer to consumption curve on page 5.

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LEM reserves the right to carry out modifications on its transducers, in order to improve themN° 97.T7.99.000.0
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1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
Input Signal
Parameter

Symbol Unit

Rogowski coil sensitivity selection

DataComment

With push buttons

See product configuration
description

bi-color LED

Green: Current range
Red: Sensitivity & Output

Selection indicator
Rogowski coil sensitivities

mV/kA

22.5, 70, 80, 85, 100,120

Typical input impedancekΩ

10Hz

50 … 60

Rated frequency

ƒrCurrent measurement range selection

At 50 Hz

Automatic recognition of gridfrequency

With push buttons

Current measurement range

A

100, 200, 300, 400, 500,600, 800, 1000, 1500,2000, 4000, 5000

Overcurrent measurement range%120

Overcurrent based on maximum
value of the selected range

Short time withstand current
on primary for 3 s (1) kA130

Worst case scenario with a
Rogowski coil sensitivity of 120 mV/
kA

Output Signal
Parameter

Symbol UnitMinTypMax

Comment
1 A @ 100% I range (2)0 ...1 A instantaneous current output mode

Iout

A01

1.2

Load resistance

RL

Ω

0-

1.5

Temperature coefficient of S (all output mode)

TCS

ppm/K--150

From −25 °C … +70 °CFrequency bandwidth (@ −3 dB)

BWHz

91450

101500111550Low cut-off frequency
High cut-off frequency

Phase displacement @ 50 Hz or 60 Hz Δφ°--0.2

Accuracy class--0.5 (3) -Linearity error

ɛL%

0.1

Notes: 1) Maximum AI-P1A input voltage of 16 V for 3 s equivalent of measurement of short time current of 130 kA for 3 s with a Rogowski coil		 of 120 mV/kA sensitivity. For higher short time current rated network please consult our technical team.
2)
Output signal is 1.2 A for 120% of I range, nevertheless the product is not intended to be used on continuous mode at this output		 level. Thermal protection may operate in case of thermal overload.
3)
AI-P1A integrators fulfill accuracy class limits defined by IEC 61869-2 even if this standard does not apply to Rogowski integrators.		 See detailed curve of accuracy given in this document.
N° 97.T7.99.000.0
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LEM reserves the right to carry out modifications on its transducers, in order to improve them

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1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
Definition of typical, minimum and maximum values
Minimum and maximum values for specified limiting and safety conditions have to be understood as such aswell as values shown in “typical” graphs.
On the other hand, measured values are part of a statistical distribution that can be specified by an intervalwith 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 witha 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.

Compatibility between current range selected and Coil sensitivity selected
Current range and coil sensitivity should be chosen according to the table below.
Coil sensibility selected100200
Current Range Selected

300
400
500
600
800
1000
1500
2000
4000
5000

22.5

70

80

85

100120































































Front panel LED indicator

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Green (x12)Current range

Red (lower x6)

Input sensitivity

Range position blinking Red + Green

Input overload

Running lightOver temperature protection activated (outputdisabled)

LEM reserves the right to carry out modifications on its transducers, in order to improve them

N° 97.T7.99.000.0
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AI-P1A series

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
AI-P1A output current vs load resistanceAmbient temperature 25 °C … 70 °C1)

Iout (A)
1.1
25 °C

165 °C

0.9

70 °C

0.8
0.7
0.6
0.5
0.4

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5
RL (Ω)

Note: 1) Typical values measured in laboratory conditions (climatic chamber, stirred air)

AI-P1A current consumption vs temperature
600 mA
500 mA
400 mA
300 mA
200 mA
100 mA
0 mA-25 °C0 °C
16.8V / 1 Arms
16.8V / 0 Arms

25 °C
24V / 1 Arms
24V / 0 Arms

50 °C

75 °C

31.2V / 1 Arms
31.2V / 0 Arms

Supply voltage 16.8 V … 31.2 V
Ouput current 0 ARMS and 1 ARMS
N° 97.T7.99.000.0
6July2022/Version 2

LEM reserves the right to carry out modifications on its transducers, in order to improve them

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1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
Typical performance characteristics, Range 100 A
Output 0 … 1 A, Sensitivity 22.5 mV/kA
εL (% of IPN)
2.5

0.15

2.00.10

1.5Class accuracy 0.5

1.0

Full scale error 0.5%
0.05

0.5
0.0

0.00

-0.5
-1.0

-0.05

-1.5
-0.10

-2.0
-2.5

020

40

60

80

100120-0.150204060

80

100IP (A)Measurement error (%) @ 25 °C

120IP (A)Linearity error (% of IP N) @ 25 °C

Typical performance characteristics, Range 1000 A
Output 0 … 1 A, Sensitivity 22.5 mV/kA
εL (% of IP N)
0.15

2.5
2.0

0.10

1.5
1.0

Class accuracy 0.5

Full scale error 0.5%
0.05

0.5
0.0

0.00

-0.5
-0.05

-1.0
-1.5

-0.10

-2.0
-2.5

0200

400

600

800

1000

1200

-0.15

0200

400

600

IP (A)

Measurement error (%) @ 25 °C

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800

1000

1200
Ip (A)

Linearity error (% of IP N) @ 25 °C

LEM reserves the right to carry out modifications on its transducers, in order to improve themN° 97.T7.99.000.0
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AI-P1A series

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
Example of application
Product configuration:• Range (green LED): 5000 A• Output signal: 0 … 1.2 A• Sensitivity (red LED): 22.5 mV/kA
The graph hereafter gives conversion between the primary current, the voltage output of Rogowski coil andthe output voltage of the AI-P1A.
Output current (A)

1.2
20 %
120 %

0.2
022,50112,51

5135

6Rogowski coil signal (mV)
22.5 mV / kA sensitivity

Primary current (kA)

Saturation - Range LED is blinking

N° 97.T7.99.000.0
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LEM reserves the right to carry out modifications on its transducers, in order to improve them

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1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
Example of typical transient response output 0 … 1 A
1,51

Normalized

0,50-0,5-1

tD 90-1,5-0,100,10,20,30,40,50,60,70,80,91Time (s)AI-P1A Output

Current rise

GridErrortD 90 < 240 ms

1,51Normalized

0,50-0,5-1-1,5tD 90-0,100,10,20,30,40,50,60,70,80,91

Time (s)AI-P1A Output

Current fall

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GridErrortD 90 < 240 ms

LEM reserves the right to carry out modifications on its transducers, in order to improve them

N° 97.T7.99.000.0
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1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
Connections and Interfaces

AE
B

CA SMA Input for Rogowski coil (optional)

D Cross Power plug-in

Section: 0.13 ... 1.5 mm2Side contacts to stack up to 3 Integrator
modules and use only 1 power supply.

B Terminal input coil and output signal

E Micro USB

Section: 0.13 ... 1.5 mm2

Energise AI-1A for configuration
without connecting 24 V DC supply.

C Power supply terminals (DC, 24 V)

Section: 0.13 ... 1.5 mm2 (24 ... 16 AWG)
Third pin not connectedParameter

DUnit

Min

Type

TypMaxPush-in

Clamping range

mm20.13-

1.5Cross section

AWG24-

16Stripping lengthmm

9.510

10.5

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LEM reserves the right to carry out modifications on its transducers, in order to improve them

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1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
AI-P1A series: name and codification

AI-P1AFamily:
AC Integrator

Case type / Output signal 1 A:
P: DIN RAIL mounting / 1 Ampere output
Description

Item Number

Comment

AI-P1A

90.T7.99.000.0

Integrator 1A standard
for automation applications

AI ACCESSORY KIT M2 CROSS POWER PLUG-IN (1)90.T8.98.001.0

Cross Power plug-in accessory:
Kit to connect 2 integrators power supplies

Dimensions (in mm)
76545000 A

4-20mA

1A

4000 A

5V

2000 A1500 A

10V

1000 A

225mV

800 A
22.5500 A

70400 A

80300 A

85200 A

100100 A

120333mVmV/kA @ 50Hz

100600 A

SELECT

EDIT

321

23.1

78
85.5

Installation, removal, wiring

100200 A
100 A

120

CT

SELE

EDIT
A

1A

4000

A

5000

A

2000

A

4000

A

1500

A

2000

A

1000A

500 A
400 A
300 A
200 A
100 A

22.5
7080
85mV/kA @ 50Hz

800 A
600 A

100120

1500

A

1000A

800 A
600 A
500 A
400 A
300 A
200 A
100 A

1A

22.5
7080
85mV/kA @ 50Hz

5000

100120SELECT
SELECT
EDIT
EDIT

To install, rotate terminal to mounton the rail DIN

To remove the device, use a 4 mmflat screwdriver

To remove wiring easily, use anytools or a 2.5 mm flat screwdriver

Note: 1) the stacking of 3 AI-P1A with this kit may reduce the maximum temperature before triggering the over-temperature protection.
A special care must be taken in the installation and venting conditions
N° 97.T7.99.000.0
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1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER
Safety and warning notes
In order to guarantee safe operation of the signal conditioner and to be able to make proper use of allfeatures and functions, please read these instructions thoroughly!
Safe operation can only be guaranteed if the signal conditioner is used for the purpose it has been
designed for and within the limits of the technical specifications.
CautionIgnoring the warnings can lead to serious injury and/or cause damage! The electric measuring signal
conditioner 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 andoperation of the signal conditioner and any electrical conductor. The signal conditioner shall be usedin electric/electronic equipment with respect to applicable standards and safety requirements and inaccordance with all the related systems and components manufacturers’ operating instructions.
The product must be powered by a limited power source. The product shall be operated with Rogowski
Coil compliant with IEC 61010-2-032. Consistency of measurements during maintenance operations shallbe checked. Consistency of measurement during commissioning and maintenance shall be checked withsuitable means (clamp-on ammeter). Product shall not saturate .
Caution, possibility of electric shock
When operating the signal conditioner, certain parts next to the signal conditioner may carry hazardous
live voltage. The user shall ensure to take all measures necessary to be protected against electrical shock.
Certain parts may contain 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 withthe main power supply disconnected except if there are no hazardous live parts in or in close proximity to thesystem and if the applicable national regulations are fully observed.
Safe and trouble-free operation of this signal conditioner can only be guaranteed if transport, storage andinstallation are carried out correctly and operation and maintenance are carried out with care. The signal
conditioner shall not be opened or modified. If not working, the signal conditioner shall be replaced by anequivalent device. To avoid electrical burn, electric shock or arc flash, do not install Rogowski coils on or
remove them from hazardous live conductors. Any connection to the product shall fulfil the requirements forsafety extra low voltage (SELV) circuits.

N° 97.T7.99.000.0
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LEM reserves the right to carry out modifications on its transducers, in order to improve them

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LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

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LEM reserves the right to carry out modifications on its transducers, in order to improve them

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