LAS 50-TP/SP1

## **Current Transducer LAS 50-TP/SP1** 

For the electronic measurement of currents : DC, AC, pulsed, mixed, with a galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). 

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|aeensoun|D|0|
|eS|RS|
|Lemna|on|C€|cSALUS|Or|
|\|2002/95/EC|
|16067|
|Electrical data|
|P|C|
|I|PN|Primary nominal r.m.s. current|50|A|
|I|P|Primary current, measuring range|0 .. ± 150|A|
|V|OUT|Analog output voltage @|I|P|V|REF ±|(0.625·|I|P/|I|PN)|V|
|I|P = 0|V|REF  ± 0.025|V|
|R|L|Output load resistance|≥ 2|k|Ω|
|R|OUT|Output internal resistance|< 20|Ω|
|V|REF|Internal reference voltage|2.5 ± 0.025|V|
|V|REF load resistance|≥ 1|MΩ|
|V|REF internal resistance|200|Ω|
|V|REF external voltage range|2.0 ..  2.8|V|
|C|L|Max. output capacitive load|1|nF|
|V|C|Supply  voltage (± 5 %)|5|V|
|I|C|Current consumption @|V|C = 5 V|typ|18|mA|
|Accuracy - Dynamic performance data|
|X|Accuracy|[1)]|@|I|PN ,|T|A = 25°C|< ± 1|%|
|ε|L|Linearity error 0 ..|I|PN|[2)]|< 0.7|%|
|Typ|Max|
|TCV|OUT Thermal drift of|V|OUT @|I|P = 0|- 40°C .. + 85°C|80|120|ppm/K|
|TCV|OUT /|V|REF Thermal drift of|V|OUT /|V|REF @|I|P = 0    - 40°C .. + 85°C|50|80|ppm/K|
|TCε|G|Thermal drift of the gain|- 10°C .. + 85°C|150|300|ppm/K|
|- 40°C ..  - 10°C|400|700|ppm/K|
|V|OM|Residual voltage|@|I|P = 0, after an overload of 2 x|I|PN DC|± 5|mV|
|t|ra|Reaction time @ 10 % of|I|PN|< 200|ns|
|t|r|Response time @ 90 % of|I|PN|< 500|ns|
|di/dt|di/dt|accurately followed|> 100|A/µs|
|Output noise without external filter|< 10|mVpp|
|f|Frequency bandwidth (- 1 dB)|DC .. 100|kHz|
|General data|
|T|A|Ambient operating temperature|- 40 .. + 85|°C|
|T|S|Ambient storage temperature|- 40 .. + 100|°C|
|m|Mass|20|g|
|Standards|EN 50178 : 1997|

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## **I = 50  A PN** 

## **Features** 

- Current transducer using Eta-technology 

- Unipolar voltage supply 

- Insulated plastic case recognized according to UL 94-V0 

- Compact design for PCB mounting 

- Extended measuring range. 

## **Special feature** 

- The internal reference is ratiometric. 

## **Advantages** 

- Excellent accuracy 

- Very good linearity 

- Very low temperature drift 

- Optimized response time 

- Wide frequency bandwidth 

- No insertion losses 

- High immunity to external interference 

- Current overload capability. 

## **Applications** 

- AC variable speed drives and servo motor drives 

- Static converters for DC motor drives 

- Battery supplied applications 

- Uninterruptible Power Supplies (UPS) 

- Switched Mode Power Supplies (SMPS) 

- Power supplies for welding applications. 

## **Application domain** 

- Industrial. 

All Data are given with a RL = 10 kΩ 

Notes :[1)] Excluding electrical, magnetic offsets and linearity 2) Including magnetic offset. 

Copyright protected. 

060410/12 

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

Page 1/3 

LEM 

www.lem.com 

## **Current Transducer LAS 50-TP/SP1 Isolation characteristics** —— 

|**V**d|R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn|5|kV|
|---|---|---|---|
|**V**w|Impulse withstand voltage 1.2/50 µs|>8|kV|
|**V**e|R.m.s. voltage for partial discharge extinction @ 10pC|>2|kV|
|||Min||
|**dCp**|Creepage distance3)|10.70|m m|
|**dCl**|Clearance distance3)|10.70|m m|
|**CTI**|Comparative Tracking Index  (Group III a)|175||



## **Application 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**|
|---|---|---|
|dCp, dCI|Rated isolation voltage|Nominal voltage|
|Single isolation|1000 V|1000 V|
|Reinforced isolation|500 V|500 V|



- Note : 3) On PCB with soldering pattern UTEC93-703. 

## **Safety** 

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 built-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. 

060410/12 

Page  2/3 

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

LEM 

www.lem.com 

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## **Dimensions  LAS 50-TP/SP1** (in mm. 1 mm = 0.0394 inch) 

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## **Front view** 

**Left view** 

|Num b e r of<br>p rim a ry turns|P rim a ry current<br>N o<br>N o m inal<br>M a xim a l<br>**I**P N[A ]<br>**I**P[A ]<br>V|P rim a ry current<br>N o<br>N o m inal<br>M a xim a l<br>**I**P N[A ]<br>**I**P[A ]<br>V|m ina l output<br>voltage<br>OUT[V ]|[mΩ<br>P rim a ry<br>resistance<br> **R** P|]<br>P rim a ry<br>insertion<br>inductance<br>**L**P[µH]|
|---|---|---|---|---|---|
||N o m inal<br>**I**P N[A ]|||||
|1|5 0|1 5 0<br>V|R E F±  0 .625|0.12|0.0 0 8|



## **Mechanical characteristics** 

- General tolerance 

± 0.2 mm 

## **Output Voltage - Primary Current** 

( **V** REF = 2.5 V in this example) 

- Fastening & connection of primary 6 pins 1.4 x 1 mm Recommended PCB hole 2 mm 

- Fastening & connection of secondary 4 pins 0.7 x 0.6 mm Recommended PCB hole 1.2 mm 

## **Remarks** 

- **V** OUT  is positive when **I** P flows from terminals "IN" to terminals "OUT". 

- Temperature of the primary conductor should not exceed 100°C. 

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V OUT  [ V ]<br>5<br>4.375<br>3.125<br>2.5<br>1.875<br>0.625<br>I P  [ A ]<br>  -  I Pmax     -  I PN   0     I PN             I Pmax<br>**----- End of picture text -----**<br>


060410/12 

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

Page 3/3 

LEM 

www.lem.com