AKR 5 B420L

## **AC Current transducer AKR-B420L** 

## **I = 2..200A PN** 

A Split Core transducer for the electronic measurement AC waveforms current, with galvanic isolation between the primary (High power) and the secondary circuits (Electronic circuit). Jumper selectable ranges and True RMS 4-20mA current output. 

## **Electrical data** 

|Primary Nominal Current<br>Analogue Output Signal1)|Primary Nominal Current<br>Analogue Output Signal1)|Primary Nominal Current<br>Analogue Output Signal1)|Type|RoHS||
|---|---|---|---|---|---|
|I|IPN(A.t.RMS)<br>IOUT(mA)|||Date Code||
|2,5|2,5<br>4-20|**AKR 5 B420L**||JUNE  2006|JUNE  2006|
|10,20,50|10,20,50<br>4-20|**AKR 50 B420L**||planned||
|100,150,200<br>4-20||**AKR 200 B420L**||planned||
|Vc|Supply voltage (Loop powered)||24|V DC|V DC|
|RL|Load resistance|see power supply diagram||||
|**V**b|Rated voltage (CAT III, PD2)||150|V AC|V AC|
|Vd|RMS Isolation voltage test, 50 Hz, 1mn|RMS Isolation voltage test, 50 Hz, 1mn|3|kV AC|kV AC|
|f|Frequency bandwith||10-400||Hz|
||**Accuracy - Dynamic performance data**|||||
|X|Accuracy @ IPN, TA=25°C||±1||%|
|tr|Response time @ 90% of IPN||< 600||mS|
||**General data**|||||
|TA|Ambient operating temperature (0-95% RH)||- 20 ..+ 50||°C|
|TS|Ambient storage temperature||- 20 ..+ 85||°C|
|m|Mass||120||g|
||Safety<br>EMC||IEC 61010-1<br>EN 61326|||



## **Features** 

- VFD and SCR waveforms current measurement 

- True RMS responding 

- Split core box 

- Current output 

- Loop powered transducers 

- Panel mounting 

- Jumper selectable ranges 

## **Advantages** 

- Large aperture 

- High isolation between primary and secondary circuits 

- Easy to mount 

## **Applications** 

   - VFD Controlled Loads: VFD output indicates how the motor and attached load are operating. 

   - SCR Controlled Loads: Acurate measurement of phase angle fired or burst fired (time proportioned) SCRs. 

   - Switching Power Supplies and 

- Note: 1) For 4-20mA output model, no saturation output up to 23 mA. 

## **Selecting the transducer** 

VFD (Variable Frequency Drive) and SCR (Semi Conductor Rectifier) output waveforms are rough approximations of a sine wave. There are numerous spikes and dips in each cycle. AKR transducers use a mathematical  algorithm called “True RMS,” which integrates the actual waveform over time. True RMS is the only way to accurately measure distorted AC waveforms. _Select AKR transducers for_ 

- Electronic Ballasts: True RMS sensing is the most accurate way to measure power supply or ballast input power. 

## **Options on request** 

- DIN mounting 

_nonlinear loads or in “noisy” power environments._ 

060816/5 Page 1/2 

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

LEM 

www.lem.com 

## **Dimensions AKR-B420L** (unit : mm,  1mm = 0.0394 inch) 

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## **Mechanical characteristics** 

- General tolerance ± 1 mm • Primary aperture 21.7 mm sq. • Panel mounting 2 holes ∅ 4.5mm Distance between holes 77.3 mm 

## **Power Supply diagram** 

## **Connections** 

- 2 x UNC8 Cylindric Head 

## **Remark** 

- Temperature of the primary conductor should not exceed 60°C. 

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

060816/5 

Page  2/2 

LEM 

www.lem.com