APR 50 B420L

## **AC Current Transducer APR-B420L** 

## _I_ **= 10 ... 400 A** P N 

Split-core transducer for the electronic measurement of AC currents (all waveforms), with galvanic separation between the primary circuit and the secondary circuit. Switch selectable measuring ranges and true RMS 4-20 mA current output (loop powered). 

## **Features** 

## ~~**Elecrical data** ee~~ 

Primary nominal current Output current Types RoHS since _I_ P N (At RMS) _I_ out (mA) date code 10, 25, 50 4-20 **APR 50 B420L** 46354 50, 75, 100 4-20 **APR 100 B420L** 47009 100, 150, 200 4-20 **APR 200 B420L** 46317 200, 300, 400 4-20 **APR 400 B420L** 46291 _U_ C Supply voltage (loop powered) +12 … 24 V DC _R_ L Load resistance, with _U_ C = +24 V DC[1) ] < 350 Ω _I_ S L Output current limitation[2) ] < 25 mA _Î_ P max Primary withstand peak current (maximum) no limitation 

## ~~**Accuracy - Dynamic performance data** ee~~ 

_ε_ Error @ _I_ P N, _T_ A = 25 °C (excluding offset) < ±1 % of _I_ P N _ε_ L Linearity error (0 … ± _I_ P N) < ±0.5 % of _I_ P N _I_ O E Electrical offset current @ _T_ A = 25 °C 4 mA _TCI_ O E Temperature coefficient of _I_ O E ±1 µA/K _TCI_ out Temperature coefficient of _I_ out (% of reading) ±0.1 %/K _t_ D 90 Delay time to 90 % of the final output value for _I_ P N step < 400 ms _BW_ Frequency bandwidth (±1 %) 30 … 6000 Hz Notes: 1) Max. Load Resistance vs. Supply voltage 

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30<br>25<br>20<br>15<br>10<br>5<br>0<br>0 50 100 150 200 250 300 350 400<br>Load Resistance<br>Supply Voltage<br>**----- End of picture text -----**<br>


- 2)  The output current will never exceed this value for safety and protection reasons. The output value is not valid when measuring above the primary nominal current value. 

- 3)  Although the transducer can withstand very high currents, the measuring performance specified in the datasheet is valid within the 4-20 mA output range only. 

- ●VFD and SCR waveform currents measurement 

- ●True RMS output 

- ●Split-core type 

- ●Loop powered 4-20 mA current output 

- ●DIN rail or Panel mounting 

- ●Switch selectable measuring ranges 

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

## **Advantages** 

- ●Large aperture for cable up to ⌀ 18 mm 

- ●High insulation between primary and secondary circuits 

- ●Eliminates insertion loss 

- ●Easy installation. 

## **Applications** 

- _**VFD Controlled Loads:**_ 

VFD output indicates how the motor and attached load are operating. 

- _**SCR Controlled Loads:**_ Accurate measurement of phase angle fired or burst fired (time proportioned) 

SCRs. Current measurement gives faster response than temperature measurement. 

- _**Switching Power Supplies and Electronic Ballasts:**_ 

True rms sensing is the most accurate wy to measure power supply or ballast input power. 

## **Application domains** 

●Energies 

- ●Automation. 

N°74.45.25.000.0; N°74.45.34.000.0; N°74.45.44.000.0; N°74.45.48.000.0 

Page 1/4 LEM International SA Route du Nant-d’Avril, 152 1217 Meyrin www.lem.com 

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

1June2022/Version 8 

## **Current Transducer APR-B420L** 

||~~**General data**~~<br>_T_A<br>Ambient operating temperature<br>−20 … +60<br>°C<br>_T_A st<br>Ambient storage temperature<br>−20 … +85<br>°C<br>_RH_<br>Relative Humidity (non-condensing)1)<br>_≤_85<br>%<br>Altitude above sea level (indoor use only)<br>2000<br>m<br>_m_<br>Mass<br>90<br>g<br>IPxx<br>Protection degree<br>IP 20<br>~~**Insulation coordination**~~<br>_U_Nm<br>Rated insulation RMS voltage2)<br>300<br>V<br>with IEC 61010-1 standards and following conditions:<br>_U_d<br>4.13<br>kV<br>_U_t<br>1.5<br>kV<br>_U_Ni<br>6.1<br>kV<br>_d_Cp<br>5.5<br>mm<br>_d_CI<br>5.5<br>mm<br>_CTI_<br>- Reinforced insulation<br>- Over voltage category CAT III<br>- Pollution degree PD2<br>RMS voltage for AC insulation test3)50 Hz, 1 min<br>Partial discharge test voltage (_q_m< 10 pC)<br>Impulse withstand voltage 1.2/50 µs<br>Creepage distance<br>Clearance4)<br>Comparative tracking index (Group I)<br>600<br>Notes:<br>1)Long-term exposure to high humidity environment may afect to product<br>reliability.|
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2)  If insulated cable is used for the primary circuit, the voltage category could be improved according to the insulation coordination given by the cable manufacturer. For example: Cable insulation (primary) Category HAR 05 600 V CAT III HAR 07 1000 V CAT III 

3) Between primary (completely filling the primary aperture) and secondary. 

- 4)  Insulation distance between primary and secondary may be reduced at actual Installation depending on type and shape of primary conductor. In such case, it is highly recommended to use insulated cable in order to maintain required insulation voltage. 

Page 2/4 LEM International SA Route du Nant-d’Avril, 152 1217 Meyrin www.lem.com 

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

1June2022/Version 8 

## **Current Transducer APR-B420L** 

## ~~**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 electical 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. 

Page 3/4 LEM International SA Route du Nant-d’Avril, 152 1217 Meyrin www.lem.com 

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

1June2022/Version 8 

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

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Load<br>24 V DC Power<br>4-20 mA (Controller,<br>Meter, etc,)<br>(-)<br>(+)<br>PS STR<br>AP/APR<br>Output<br>sis Connector<br>3none2(-) 1(+)<br>Front Range Switch<br>**----- End of picture text -----**<br>


## **Connections** 

- ●Wires up to ⌀ 2 mm 

- ●Female connector provided (spring terminal blocks) 

- ●User-friendly spring-cage connection for no-tool direct conductor connection 

## **Mechanical characteristics** 

- ●General tolerance ±1 mm ●Primary aperture ⌀ 18.5 mm ●Panel mounting 2 holes ⌀ 4 mm ●Distance between holes 40 mm 

   - For panel mounting, replace M4 screws by new one (not supplied) with appropriate length to panel’s thickness. 

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+24V DC<br>OUT I S<br>GND<br>**----- End of picture text -----**<br>


Page 4/4 LEM International SA Route du Nant-d’Avril, 152 1217 Meyrin www.lem.com 

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

1June2022/Version 8