AHR 2000 B420

## **Current Transducer AHR B420** 

## _I_ **= 500 ... 2000 A** P N 

## **Ref: AHR 500 B420; AHR 800 B420; AHR 1000 B420;  AHR 1500 B420;  AHR 2000 B420** 

For the electronic measurement of currents: DC, AC, pulsed...,with galvanic separation between the primary circuit and the secondary circuit. 

## **Features** 

## ~~**Electrical data**~~ 

|Primary|nominal<br>Primary AC current,<br>Output voltage|nominal<br>Primary AC current,<br>Output voltage|Type|
|---|---|---|---|
|DC & AC current<br>max. peak value1)||||
|_I_P N(A)<br> _I_P M(A)_I_out(mA DC)||||
|500|<br>2000<br>4-20|AHR|500 B420|
|800|<br>2500<br>4-20|AHR|800 B420|
|1000<br>2000<br>4-20||AHR 1000 B420||
|1500<br>2500<br>4-20||AHR 1500 B420||
|2000<br>3000<br>4-20||AHR 2000 B420||
|_R_L|Load resistance|< 300|Ω|
|_U_C|Supply voltage (±5 %)1)|+20 ... 50|V DC|
|_I_C|Current consumption|30 mA +_I_out||
|_I_S L|Output current limitation|< 25|mA|
|_Î_P max|Primary withstand peak current (maximum)|30000|A|
|~~**Accuracy - Dynamic performance data**2)~~||||
|_ε_|Error @_I_P N,_T_A= 25 °C (excluding ofset)|< ±1|% of_I_P N|
|_ε_L<br>_I_O E<br>_TCI_O E|Linearity error (1 % of_I_P N… ±_I_P N)<br>Electrical ofset current @_T_A= 25 °C<br>Temperature coefcient of_I_O E<br>0 °C … +60 °C|< ±1.0<br>4 ±0.2<br>±3.2|% of_I_P N<br>mA<br>µA/K|
||−40 °C … +70 °C|±6.4|µA/K|
|_TCI_out<br>_t_D 90|Temperature coefcient of_I_out(% of reading)<br>±0.15<br>Delay time to 90 % of the fnal output value for_I_P Nstep< 150||%/K<br>ms|
|_BW_|Frequency bandwidth (±1 dB)|DC 20 … 6000<br>Hz||
|~~**General data**~~||||
|_T_A|Ambient operating temperature|−40 … +70|<br>°C|
|_T_A st|Ambient storage temperature|−40 … +85|<br>°C|
|_m_|Mass|650|g|
|IPxx|Protection degree|IP20||
||Standard|EN 50178: 19973)||
|Notes:|1)The max peak AC current is the highest peak level|of primary signal that||
||is taken into account for accurate true RMS calculation. Yet the device is|||
|<br>|designed for maximum continuous true RMS value equal to_I_P N,<br>the output is limited by the above specifed output limitation.<br>||whereas<br>|



- 2) WARNING: The specified characteristics of the transducer are only 

- guaranteed if the paired top and bottom parts are mounted together and not mixed with similar parts of other transducers. 

- ●DC + distorted AC waveform currents measurement 

- ●True RMS output 

- ●Busbar or panel mounting 

- ●Split core type 

- ●Insulating plastic case recognized according to UL 94-V0. 

## **Advantages** 

- ●High insulation between primary and secondary circuits 

- ●Eliminates insertion loss 

- ●Easy installation. 

## **Applications** 

- ●AC power supplies or Motors: True RMS current sensing - the most accurate way to monitor power supply or motor input power 

- ●VFD Controlled Loads: VFD output current monitoring to indicate how the motor and attached load are operating. 

- ●SCRs or Swith-mode Rectifiers: Accurate measurement of output current 

- ●Renewable Energy Installations or Backup Batteries: Continuous condition minitoring allowing automatic failure detection/ anticipation. 

## **Application domain** 

   - ●Energy solutions. 

- 3) Regarding compliance towards IEC 61000-4-6 (EN 61000-6-2 (2005)): 

- Variation of the offset between 150 kHz and 80 kHz with 10 V AM 80 % @ 1 kHz. 

N° 74.42.50.000.0, 74.42.56.000.0, 74.42.60.000.0, 74.42.65.000.0, 74.42.69.000.0 

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

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

18October2022/Version 14 

## **Current Transducer AHR B420** 

## ~~**Insulation coordination**~~ 

|_U_d|RMS voltage for AC insulation test1), 50 Hz, 1min|5.8|kV|
|---|---|---|---|
|_d_Cp|Creepage distance|11.9|mm|
|_d_CI|Clearance|11.9|mm|
|_CTI_|Comparative tracking index (group IIIa)|225||



Note: 1) Between primary (completely filling the aperture) and secondary. 

## **Applications examples** 

According to **EN 50178 and IEC 61010-1 standards** and following conditions: 

- ●Over voltage category OV 3 

- ●Pollution degree PD2 

- ●Non-uniform field 

||**EN 50178**|**IEC 61010-1**|
|---|---|---|
|_d_Cp,_d_CI,_U_Ni|Rated insulation voltage|Nominal voltage|
|Basic insulation|1000 V|1000 V|
|Reinforced insulation|500 V|500 V|



## **Safety** 

This transducer must be used in limited-energy secondary circuits according to IEC 61010-1. 

This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer’s operating instructions. 

Caution, risk of electrical shock. 

When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). 

Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a build-in device, whose conducting parts must be inaccessible after installation. 

A protective housing or additional shield could be used. Main supply must be able to be disconnected. 

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

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

18October2022/Version 14 

**Dimensions AHR B420** (in mm) 

**==> picture [511 x 363] intentionally omitted <==**

**----- Start of picture text -----**<br>
Connection<br>U C<br>I S<br>I P<br>I P N I P N<br>d Cl d Cp<br>U C<br>I S<br>I P<br>**----- End of picture text -----**<br>


## **Mechanical characteristics** 

- ●General tolerance 

●General tolerance ±1.0 mm ●Primary aperture 104 × 40 mm ●Mounting Busbar fastening 1 hole ⌀ 5.5 mm & 2 slots 5.5 × 35 mm Panel mounting 4 holes ⌀ 3.3 mm Distance between hole axes 15 × 150 mm For panel mounting, use M4 screws (not supplied) with appropriate length to panel’s thickness, and tighten to 0.8 N·m ±20 % torque. 

## **Remarks** 

- ●The return busbar and primary conductor elbow must be located at a minimum distance of 2.5 × the window length away from the transducer case. 

- ●Temperature of the primary conductor can not exceed 90 °C. 

- ●Dynamic performances ( d _i_ /d _t_ and delay time) are best with a single bar completely filling the primary hole. 

- ●This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. 

## **Transfer characteristics** 

**==> picture [99 x 79] intentionally omitted <==**

**----- Start of picture text -----**<br>
I P N I P N<br>**----- End of picture text -----**<br>


- ●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: 

. **https://www.lem.com/en/file/3137/download/** 

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

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

18October2022/Version 14