AT100B420L

## **AC Current transducer AT-B420L** 

**I = 5 .. 150 A** PN 

Split-core transducer for the electronic measurement of AC waveform currents, with galvanic isolation between the primary circuit (power) and the secondary circuit (measurement). 4-20 mA current output proportional to the RMS value of the primary current. CET CE bos2002/95/EC 

## **Electrical data** 

## **Features** 

|**Electrical data**|||
|---|---|---|
|Primary nominal|Output current|Type|
|current rms|||
|**I**PN (A.t.Rms)|**I**OUT (mA)||
|5|4-20|**AT 5 B420L**|
|10|4-20|**AT 10 B420L**|
|20|4-20|**AT 20 B420L**|
|50|4-20|**AT 50 B420L**|
|100|4-20|**AT 100 B420L**|
|150|4-20|**AT 150 B420L**|



|**R**L<br>**V**C|Load resistance, with**V**C= + 24 V DC1)<br>Supply voltage (loop-powered)|< 600<br>+ 20 .. 30|W<br>V DC|
|---|---|---|---|
|**I**SL|Output current limitation|< 30|mA|
|**Î**P|Overload capability - continuous|120|% of**I**PN|
||- 1 min|150|% of**I**PN|
|**Performance data**||||
|**X**|Accuracy @**I**PN,**T**A= 25°C (excluding offset)|< ± 1.5|% of**I**PN|
|eL<br>**I**OE<br>**t**r<br>**BW**|Linearity error<br>Electrical offset current,**T**A= 25°C<br>Response time to 90% of**I**PNstep<br>Frequency bandwidth|< ± 0.5<br>4 ± 0.2<br>< 100<br>50/60|% of**I**PN<br>mA<br>ms<br>Hz|
|**General data**||||
|**T**A|Ambient operating temperature|- 20 .. + 60|°C|
|**T**S|Ambient storage temperature|- 20 .. + 85|°C|
|**_m_**|Mass|90|g|
|**IPxx**|Protection degree|IP40||



**==> picture [206 x 114] intentionally omitted <==**

**----- Start of picture text -----**<br>
Note:  1) Max. Load Resistance vs. Supply Voltage<br>35<br>30<br>25<br>20<br>15<br>400 500 600 700 800 900 1000<br>Max. Load Resistance (Ohm)<br>Supply Voltage (V)<br>**----- End of picture text -----**<br>


- RMS output 

- Loop-powered 4-20mA current output 

- Split-core type 

- Ø 16 mm sensing aperture for non-contact measurement 

- Terminal output 

- Isolated plastic case recognized according to UL 94-V0. 

## **Advantages** 

- High isolation between primary and secondary circuits 

- Compact case 

- Cost-effective solution 

   - Easy installation 

- 

## **Applications** 

- _**Automation and Supervision**_ Current measurement for process regulation by distributed PLCs or remote control (e.g. SCADA software) 

- _**Safety and Condition Monitoring**_ Load monitoring for protection systems and predictive maintenance (e.g. conveyers, pumps or HVAC motors) 

- _**Energy management**_ Convenient connection to power consumption sub-meters 

## **Application domain** 

- Energy and Automation 

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

Page 1/3 

090609/6 

www.lem.com 

## **Current Transducer AT-B420L** 

## **Isolation characteristics** 

|**V**b|Rated isolation voltage rms2)|300|V|
|---|---|---|---|
||with IEC 61010-1 standards and following conditions:|||
||- Reinforced isolation|||
||- Over voltage category CAT III|||
||- Pollution degree PD2|||
||- Heterogeneous feld|||
|**V**d|Rms voltage for AC isolation test3), 50Hz, 1min.|3.5|kV|
|**dCp**|Creepage distance|6|mm|
|**dCl**|Clearance distance|6|mm|
|**CTI**|Comparative tracking index (Group I)|600||



Notes:[2)] If insulated cable is used for the primary circuit, the voltage category could 

be improved according to the primary cable insulation category (please 

- refer to the cable manufacturer’s indications) 

- 3) between primary (completely filling the hole) and secondary. 

## **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 rceived 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 rquirements 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, power supply). 

The user shall ensure to take all measures necessary to protect against electrical shock. The transducer is a built-in device containing conducting parts that shall not  be accessible after installation. A protective enclosure or additional insulation barrier may be necessary. 

The transducer shall not be put into operation if the jaw opening is open (split core version) or the installation is not completed. 

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. 

Page 2/3 

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

090609/6 

www.lem.com 

## **Dimensions AT-B420L** (in mm. 1 mm = 0.0394 inch) 

**==> picture [511 x 645] intentionally omitted <==**

**----- Start of picture text -----**<br>
Bottom view Back view<br>16<br>23.5<br>4 28.5 4<br>31.5<br>51 16<br>Top view<br>2-M3 terminal with cover<br>Mechanical characteristics Remarks<br>● General tolerance  ± 1 mm ● ATTENTION: contact areas (air gap) must be kept clean<br>● Primary aperture  Ø 16 mm (particle free) to ensure proper performance<br>● Fastening  Cable tie<br>Connections<br>● Wires up to 2 mm Ø p<br>(+V)(OUT)<br>(+) (-)<br>K<br>24 VDC Power<br>(+)<br>(+) OUT Is +24VDC<br>(-) Ip (-) GND<br>L<br>(-) (+)<br>Load<br>(Controller, meter etc)<br>N.P<br>18<br>18<br>1.5<br>(+V)<br>22 40.5<br>(OUT)<br>2.5<br>+<br>+<br>L K<br>**----- End of picture text -----**<br>


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

Page 3/3 

090609/6 

www.lem.com