AI-P1A

## AI-P1A 

## 1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

The 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 is DIN rail mounted. 

## **Features** 

- [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: ] 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.] 

## **Applications** 

- [MV/LV substations: transformer condition monitoring] 

- [Power measurement: 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)] 

- [Remote Terminal Units (RTU).] 

## **Standards** 

- [Safety: IEC 61010-1: 2010] 

## **Advantages** 

- [Compact design for DIN rail assembly] 

   - [EMC: IEC 61326-1: 2012] 

   - [UL 61010-1: pending.] 

- [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.] 

## **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. 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 

## AI-P1A series 

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## **Material and Insulation coordination** 

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Parameter Symbol Unit Value Comment<br>**----- End of picture text -----**<br>


|RMS voltage for AC insulation test,|_U_d|kV|1.5|Between power supply 24 V and|
|---|---|---|---|---|
|50 Hz, 5 seconds||||Rogowski connection + output|
|Flammability according to UL94|-|-|V0|-|
|Material|-|-|Polyamide|Halogen free|



## **Environmental characteristics** 

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Parameter Symbol Unit Value Comment<br>**----- End of picture text -----**<br>


|Ambient operating temperature**(1)**|_T_A|°C|−25 ...+70|
|---|---|---|---|
|Ambient storage temperature|_T_A st|°C|−40 ...+85|
|Relative humidity (non-condensing)|_RH_|%|95|
|Altitude above sea level|-|m|2000|
|Mass|_m_|g|100|



## **Mechanical characteristics** 

||**Parameter**|**Symbol**|**Unit**|**Value**|**Comment**|
|---|---|---|---|---|---|
||General dimensional tolerance|-|mm|±1||
||Dimensions|-|mm³|100 × 78 × 23.1||
||Mounting on DIN rail (IEC 60715)|-|-|TH35-7.5||
|||||TH35-15||
||**wer Supply**|||||
||**Parameter**|**Symbol**|**Unit**|**Value**|**Comment**|
||24 V DC Supply voltage|_U_C DC|V|+16.8 ...+31.2||
||Current consumption**(2)**|_I_C|mA|max. 350|@24 V with 1 A output|
||Auxiliary supply through micro-USB||V|5|For product configuration only|



## **Power Supply** 

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 them, without prior notice. 

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## AI-P1A series 

## **Input Signal** 

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Parameter Symbol Unit Data Comment<br>**----- End of picture text -----**<br>


|Rogowski coil sensitivity selection|||With push buttons|See product configuration|
|---|---|---|---|---|
|||||description|
|Selection indicator|||bi-color LED|Green: Current range|
|||||Red: Sensitivity & Output|
|Rogowski coil sensitivities||mV/kA|22.5, 70, 80, 85, 100,|At 50 Hz|
||||120||
|Typical input impedance||kΩ|10||
|Rated frequency|ƒr|Hz|50 … 60|Automatic recognition of grid|
|||||frequency|
|Current measurement range selection|||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||kA|130|Worst case scenario with a Rogowski|
|on primary for 3 s **(1)**||||coil sensitivity of 120 mV/kA|



## **Output Signal** 

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Parameter Symbol Unit Min Typ Max Comment<br>**----- End of picture text -----**<br>


|0 ...1 A instantaneous current output mode|_I_out|A|0|1|1.2|1 A @ 100%_I_range**(2)**|
|---|---|---|---|---|---|---|
|Load resistance|_R_L|Ω|0|-|1.5||
|Temperature coefficient of_S_(all output mode)|_TCS_|ppm/K|-|-|150|From −25 °C … +70 °C|
|Frequency bandwidth (@−3 dB)|BW|Hz|9|10|11|Low cut-off frequency|
||||1450|1500|1550|High cut-off frequency|
|Phase displacement @ 50 Hz or 60 Hz|_Δφ_|°|-|-|0.2||
|Accuracy class|-||-|0.5**(3)**|-||
|Linearity error|_ɛ_L|%|||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. 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## AI-P1A series 

## **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. 

## **Compatibility between current range selected and Coil sensitivity selected** 

Current range and coil sensitivity should be chosen according to the table below. 

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Coil sensibility selected<br>22.5 70 80 85 100 120<br>100      <br>200      <br>300      <br>400      <br>500      <br>600      <br>800      <br>1000      <br>1500      <br>2000     <br>4000 <br>5000 <br>Current Range Selected<br>**----- End of picture text -----**<br>


## **Front panel LED indicator** 

|**panel LED indicator**||
|---|---|
|Green(x12)|Current range|
|Red(lower x6)|Input sensitivity|
|Rangeposition blinkingRed + Green|Input overload|
|Running light|Over temperature protection activated (output<br>disabled)|



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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 

## AI-P1A series 

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## **AI-P1A output current vs load resistance** 

> [1)] Ambient temperature 25 °C … 70 °C 

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I out (A)<br>1.1<br>25 °C 65 °C<br>1<br>0.9<br>70 °C<br>0.8<br>0.7<br>0.6<br>0.5<br>0.4<br>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<br>R L (Ω)<br>**----- End of picture text -----**<br>


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

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AI-P1A current consumption vs temperature<br>600 mA<br>500 mA<br>400 mA<br>300 mA<br>200 mA<br>100 mA<br>0 mA<br>-25 °C 0 °C 25 °C 50 °C 75 °C<br>16.8V / 1 Arms 24V / 1 Arms 31.2V / 1 Arms<br>16.8V / 0 Arms 24V / 0 Arms 31.2V / 0 Arms<br>**----- End of picture text -----**<br>


Supply voltage 16.8 V … 31.2 V Ouput current 0 ARMS and 1 ARMS 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 

AI-P1A series 1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## **Typical performance characteristics, Range 100 A** 

Output 0 … 1 A, Sensitivity 22.5 mV/kA 

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εL (% of  I PN)<br>2.5 0.15<br>2.0<br>0.10<br>1.5<br>1.0 Class accuracy 0.5 Full scale error 0.5%<br>0.05<br>0.5<br>0.0 0.00<br>-0.5<br>-1.0 -0.05<br>-1.5<br>-2.0 -0.10<br>-2.5<br>0 20 40 60 80 100 120 -0.15<br>0 20 40 60 80 100 120<br>I P (A) I P (A)<br>**----- End of picture text -----**<br>


Measurement error (%) @ 25 °C 

Linearity error (% of _I_ P N) @ 25 °C 

## **Typical performance characteristics, Range 1000 A** 

Output 0 … 1 A, Sensitivity 22.5 mV/kA 

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2.5<br>2.0<br>1.5<br>Full scale error 0.5%<br>1.0 Class accuracy 0.5<br>0.5<br>0.0<br>-0.5<br>-1.0<br>-1.5<br>-2.0<br>-2.5<br>0 200 400 600 800 1000 1200<br>I P (A)<br>**----- End of picture text -----**<br>


Measurement error (%) @ 25 °C 

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εL (% of  I P N)<br>0.15<br>0.10<br>0.05<br>0.00<br>-0.05<br>-0.10<br>-0.15<br>0 200 400 600 800 1000 1200<br>I p (A)<br>**----- End of picture text -----**<br>


Linearity error (% of _I_ P N) @ 25 °C 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 

## 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 and the output voltage of the AI-P1A. 

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Output current (A)<br>1.2<br>20 %<br>1 OED|||. fi<br>ee al<br>20 %<br>0.2 =<br>0 a Rogowski coil signal (mV)<br>22,5 112,5 135 22.5 mV / kA sensitivity<br>>oo<br>:| Primary current (kA)<br>0 1 5 6<br>Saturation - Range LED is blinking<br>**----- End of picture text -----**<br>


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## AI-P1A series 

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## **Example of typical transient response output 0 … 1 A** 

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Example of typical transient response output 0 … 1 A<br>1,5<br>1<br>0,5<br>0<br>-0,5<br>-1<br>t D 90<br>-1,5<br>-0,1 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1<br>Time (s)<br>AI-P1A Output Grid Error<br>Normalized<br>**----- End of picture text -----**<br>


## **Current rise** 

## _t_ < 240 ms D 90 

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1,5<br>1<br>0,5<br>0<br>-0,5<br>-1<br>t D 90<br>-1,5<br>-0,1 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1<br>Time (s)<br>AI-P1A Output Grid Error<br>Normalized<br>**----- End of picture text -----**<br>


**Current fall** 

_t_ < 240 ms D 90 

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## AI-P1A series 

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## **Connections and Interfaces** 

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A<br>B<br>**----- End of picture text -----**<br>


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E<br>: :<br>C D<br>**----- End of picture text -----**<br>


## @ **A SMA Input for Rogowski coil (optional) D   Cross Power plug-in** Section: 0.13 ... 1.5 mm[2] 

## **D   Cross Power plug-in** 

Side contacts to stack up to 3 Integrator modules and use only 1 power supply. 

**B   Terminal input coil and output signal** Section: 0.13 ... 1.5 mm[2] 

**E   Micro USB** Energise AI-1A for configuration without connecting 24 V DC supply. 

- @ **C   Power supply terminals (DC, 24 V)** Section: 0.13 ... 1.5 mm[2] (24 ... 16 AWG) Third pin not connected 

|**Parameter**|**Unit**|**Min**|**Typ**|**Max**<br>**Comment**|**Max**<br>**Comment**|
|---|---|---|---|---|---|
|Type|||Push-in|||
|Clamping range|mm2|0.13|-|1.5||
|Cross section|AWG|24|-|16||
|Stripping length|mm|9.5|10|10.5||



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## AI-P1A series 

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## **AI-P1A series: name and codification** 

**- AI P1A Family: Case type / Output signal 1 A:** ~~Te~~ AC Integrator 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 M1 CROSS POWER PLUG-IN**(1)**|90.T8.98.000.0|Cross Power plug-in accessory:|
|||Kit to connect 2 integrators power supplies|



**Dimensions (in mm)** 

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7<br>6<br>5<br>4<br>5000 A 1 A 4-20mA<br>4000 A2000 A 5V<br>1500 A 10V<br>1000 A<br>800 A 225mV<br>600 A 22.5<br>100 500 A 70 333mV<br>400 A 80<br>300 A 85<br>200 A 100<br>100 A 120<br>SELECT<br>EDIT<br>3<br>2<br>1<br>23.1 78<br>iB 85.5<br>Installation, removal, wiring<br>Q O B<br>nJ ,,<br>To install, rotate terminal to mount   To remove the device, use a 4 mm  To remove wiring easily, use any<br>on the rail DIN flat screwdriver tools or a 2.5 mm flat screwdriver<br>Note:  [1)]   the stacking of 3 AI-P1A with this kit may reduce the maximum temperature before triggering the over-temperature protection.<br>A special care must be taken in the installation and venting conditions:<br>SELECT<br>EDIT<br>SELECT SELECT<br>EDIT EDIT<br>22.5100120708085 22.5100120708085<br>5000 A4000 A2000 A1500 A1000 A800 A600 A500 A400 A300 A200 A100 A 1 A 5000 A4000 A2000 A1500 A1000 A800 A600 A500 A400 A300 A200 A100 A 1 A<br>mV/kA @ 50Hz<br>mV/kA @ 50Hz mV/kA @ 50Hz<br>**----- End of picture text -----**<br>


**Installation, removal, wiring** 

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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 

1 AMPERE OUTPUT ROGOWSKI COIL SIGNAL CONDITIONER 

## AI-P1A series 

## **Safety and warning notes** 

**In order to guarantee safe operation of the signal conditioner 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 signal conditioner is used for the purpose it has been designed for and within the limits of the technical specifications.** 

## **Caution** 

Ignoring 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 and operation of the signal conditioner and any electrical conductor. The signal conditioner 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. 

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 shall be checked. Consistency of measurement during commissioning and maintenance shall be checked with suitable 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 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 signal conditioner can only be guaranteed if transport, storage and installation 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 an equivalent 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 for safety extra low voltage (SELV) circuits. 

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## **LEM International SA** 

Chemin des Aulx 8, 1228 Plan-les-Ouates, Suisse +41 22 706 11 11 www.lem.com 

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