AT50B420L

## **AC Current Transducer AT-B420L** 

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I  = 5 ... 150 A<br>P N<br>**----- End of picture text -----**<br>


Split-core transducer for the electronic measurement of AC waveform currents, with galvanic separation between the primary circuit and the secondary circuit. 4-20 mA current output proportional to the RMS value of the RMS value of primary current. G ~~C~~ CLK WN RoHS As 

## **Features** 

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

|~~**Electrical data**~~<br>~~EEE~~|~~EEE~~|~~EEE~~|~~EEE~~|
|---|---|---|---|
|Primary nominal<br>Output current|Type|||
|RMS current||||
|_I_P N(At RMS)<br>_I_out(mA)||||
|5<br>4-20|AT 5 B420L|||
|10<br>4-20|AT 10 B420L|||
|20<br>4-20|AT 20 B420L|||
|50<br>4-20|AT 50 B420L|||
|100<br>4-20<br>150<br>4-20|AT 100 B420L<br>AT 150 B420L|||
|_R_L<br>Load resistance with_U_C= +24 V DC1)|< 600||Ω|
|_U_C<br>Supply voltage (loop-powered)|+15.2 … 30|V DC|V DC|
|_I_S L<br>Output current limitation<br>< 30<br>mA<br>_Î_P<br>Overload capability<br>- continuous<br>120<br>% of_I_P N<br>- 1 min<br>150<br>% of_I_P N<br>~~**Performance data**~~<br>_ε_<br>Error @_I_P N,_T_A= 25 °C (excluding offset)<br>< ±1.5<br>% of_I_P N<br>_ε_L<br>Linearity error<br>< ±0.5<br>% of_I_P N<br>_I_O E<br>Electrical offset current,_T_A= 25 °C2)<br>4± 0.2<br>mA<br>_t_D 90<br>Delay time to 90 % of the final output value for_I_P Nstep ≤ 100<br>ms<br>~~_EE~~||||
|_BW_<br>Frequency bandwidth<br>~~**General data**~~<br>~~EEE~~|50/60<br>~~EEE~~|~~EEE~~|Hz<br>~~EEE~~|
|_T_A<br>Ambient operating temperature<br>_T_A st<br>Ambient storage temperature|−20 … +60<br>−20 … +85||°C<br>°C|
|_RH_<br>Relative humidity (non-condensing)3)|_≤_85||%|
|Altitude above sea level|2000||m|
||Indoor use only|||
|_m_<br>Mass<br>IPxx<br>Protection degree|90<br>IP 40||g|
|Notes: 1)Maximum load resistance vs supply voltage||||



## ~~**General data** EEE~~ 

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Load Resistance vs. Supply Voltage<br>(reference information)<br>32<br>30<br>28<br>26<br>24<br>22<br>20<br>18<br>16<br>14<br>200 400 600 800 1000<br>Load Resistance [Ω]<br>Supply Voltage [V]<br>**----- End of picture text -----**<br>


- 2) Deviation of the offset during test IEC 61000-4-3 @ 10 V/m between 280 to 500 MHz 

3) Long term exposure to high humidity environment may affect to product reliability. 

- ●RMS output 

- ●Loop-powered 4-20 mA current output 

- ●Split-core type 

- ⌀ 16 mm sensing aperture for non-contact measurement 

- ●Terminal output 

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

## **Advantages** 

- ●High insulation 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 domains** 

- ●Energy 

- ●Automation. 

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N° U2.05.08.000.0; U2.05.13.000.0; U2.05.17.000.0; U2.05.25.000.0; U2.05.34.000.0; U2.05.39.000.0 

9November2022/version 11 

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 

## **Current Transducer AT-B420L** 

|~~**Insulation coordination**~~|~~**Insulation coordination**~~|||
|---|---|---|---|
|_U_Nm|Rated insulation RMS voltage1),|||
||reinforced or basic insulation|300|V|
||with IEC 61010-1 standards and following conditions:|||
||- Reinforced insulation|||
||- Over voltage category CAT III|||
||- Pollution degree PD2|||
||- Heterogeneous field|||
|_U_d|RMS voltage for AC insulation test2), 50 Hz, 1 min|3.5|kV|
|||Min||
|_d_Cp|Creepage distance|6|mm|
|_d_CI|Clearance|6|mm|
|_CTI_|Comparative tracking index (group I)|600||
|Notes:|1)If insulated cable is used for the primary circuit, the voltage category|||
|could be improved according to the insulation coordination given by the|could be improved according to the insulation coordination given by the|||
|cable manufacturer|cable manufacturer|||
||2)Between primary (completely filling the hole) and secondary.|||



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9November2022/version 11 

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 

## ~~**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 received 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 requirements and in accordance with all the related systems and components manufacturer’ operating instructions. 

## **Caution, Risk of electrical shock** 

When operating the transducer, certain parts of the module may carry hazardous live voltage (eg. primary conductor, power supply). The user shall ensure to take all measures necessary to protect against electrical shock. The transducer is a build-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. 

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9November2022/version 11 

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 

## **Dimensions AT-B420L** (in mm) 

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8 16 ee<br>23.5<br>4 28.5 4<br>31.5<br>51 16<br>cae<br>| | oe<br>| 4 to l<br>view<br>2-M3 terminal with cover<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>


## **Mechanical characteristics** 

## **Remark** 

- ●General tolerance 

●General tolerance ±1 mm ●Primary aperture ⌀ 16 mm ●Fastening Cable tie 

- ●Attention: contact areas (air gap) must be kept clean (particle free) to ensure proper performance. 

## **Connections** 

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K<br>⌀<br>(+)<br>+24 V DC<br>(+V)(OUT) OUT  I s<br>DI| — :<br>(+) (-)<br>I P (-)<br>GND<br>24 V DC Power<br>L<br>(+) O<br>(-) S<br>(-) (+)<br>Load<br>(Controller, meter etc)<br>**----- End of picture text -----**<br>


- ●Wires up to 2 mm ⌀ 

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9November2022/version 11<br>**----- End of picture text -----**<br>


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 Meyrin www.lem.com