LZSR 200-P/SP1

**Current Transducer LZSR 200-P/SP1** 

## _I_ **= 200 A** P N 

For the electronic measurement of current: DC, AC, pulsed..., with galvanic separation between the primary and the secondary circuit. 

## **Features** 

- ●Closed loop multi-range current transducer 

- ●Voltage output 

- ●Unipolar supply voltage. 

## **Special feature** 

- ●High measuring range. 

## **Advantages** 

- ●Very low offset drift 

## **Standards** 

- ●IEC 61800-3: 2017 

- ●IEC 61800-5-1: 2007 

- ●IEC 62109-1: 2010 

- ●IEC 62477-1: 2012 

- ●UL 508: 2018. 

## **Application Domain** 

   - ●Industrial. 

- ●Very good d _v_ /d _t_ immunity. 

## **Applications** 

- ●AC variable speed and servo motor drives 

- ●Battery supplied applications 

- ●Uninterruptible Power Supplies (UPS) 

- ●Switched Mode Power Supplies (SMPS) 

- ●Power supplies for welding applications 

- ●Solar inverters. 

N° 97.S7.44.001.0 

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

12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Safety** 

## ⚠ Caution 

If the device is used in a way that is not specified by the manufacturer, the protection provided by the device may be compromised. Always inspect the electronics unit and connecting cable before using this product and do not use it if damaged. Mounting assembly shall guarantee the maximum primary busbar temperature, fulfill clearance and creepage distance,  minimize electric and magnetic coupling, and unless otherwise specified can be mounted in any orientation 

Caution, risk of electrical shock 

This transducer must be used in limited-energy secondary circuits SELV according to IEC 61800-5-1, in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer’s operating specifications. 

When operating the transducer, certain parts of the module can carry hazardous voltage (e.g. primary busbar, power supply). All installations, maintenance, servicing operations and use must be carried out by trained and qualified personnel practicing applicable safety precautions. 

If the transducer is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired. 

## Ignoring this warning can lead to injury and/or cause serious damage. 

This transducer is a build-in device, whose hazardous live parts must be inaccessible after installation. This transducer must be mounted in a suitable end-enclosure. 

Use caution during installation and use of this product; high voltages and currents may be present in circuit under test. 

This transducer is a built-in device, not intended to be cleaned with any product. Nevertheless if the user must implement cleaning or washing process, validation of the cleaning program has to be done by himself. 

## ESD susceptibility 

The product is susceptible to be damaged from an ESD event and the personnel should be grounded when handling it. 

Do not dispose of this product as unsorted municipal waste. Contact a qualified recycler for disposal. 

Underwriters Laboratory Inc. recognized component 

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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Absolute maximum ratings** 

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Parameter Symbol Unit Value<br>**----- End of picture text -----**<br>


||**Symbol**|**Unit**|**Unit**|
|---|---|---|---|
|||||
|Maximum supply voltage|_U_C max|V|7|
|Maximum primary current|_I_P max|V|10 × _I_P N|
|Maximum primary conductor temperature|_T_Bmax|°C|110|
|Electrostatic discharge voltage<br>(HBM - Human Body Model)|_U_ESD HBM|kV|4|



Stresses above these ratings may cause permanent damage. Exposure to absolute maximum ratings for extended periods may degrade reliability. 

## **UL 508: Ratings and assumptions of certification** 

File # E189713 Volume: 2 Section: 14. 

## **Standards** 

- CSA C22.2 NO. 14-10 INDUSTRIAL CONTROL EQUIPMENT - Edition 11 

- UL 508 STANDARD FOR INDUSTRIAL CONTROL EQUIPMENT - Edition 17 

## **Ratings** 

**==> picture [511 x 19] intentionally omitted <==**

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Parameter Symbol Unit Value<br>**----- End of picture text -----**<br>


|**Parameter**|**Symbol**|**Unit**|**Value**|
|---|---|---|---|
|||||
|Primary involved potential||V AC/DC|1000|
|Maximum surrounding air temperature|_T_A|°C|85|
|Primary current|_I_P|A|Primary nominal current|
|Transducer supply|_U_C|V DC|5|
|Output voltage|_U_out|V|0 to 5|



## **Conditions of acceptability** 

_When installed in the end-use equipment, consideration shall be given to the following:_ 

- _1 - These devices must be mounted in a suitable end-use enclosure._ 

- _2 - The terminals have not been evaluated for field wiring._ 

- _3 - The LZSR Series shall be used in a pollution degree 2 environment or better._ 

- _4 - Low voltage circuits are intended to be powered by a circuit derived from an isolating source (such as a transformer, optical isolator, limiting impedance or electro-mechanical relay) and having no direct connection back to the primary circuit (other than through the grounding means)._ 

_5 - These devices are intended to be mounted on the printed wiring board of the end-use equipment (with a minimum CTI of 100). 6 - LZSR Series: based on results of temperature tests, in the end-use application, a maximum of 110°C cannot be exceeded on the primary conductor._ 

## **Marking** 

Only those products bearing the UL or UR Mark should be considered to be Listed or Recognized and covered under UL’s Follow-Up Service. Always look for the Mark on the product. 

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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Insulation coordination** 

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Parameter Symbol Unit Value Comment<br>**----- End of picture text -----**<br>


||**Symbol**|**Unit**|**Value**|**Value**|
|---|---|---|---|---|
||||||
|RMS voltage for AC insulation test, 50 Hz, 1 min|_U_d|kV|3||
|Impulse withstand voltage 1.2/50 µs|_U_Ni|kV|8||
|Partial discharge RMS test voltage (_q_m< 10 pC)|_U_t|kV|1650||
|Insulation resistance|_R_INS|GΩ|> 200|measured at 500 V DC|
|Clearance (pri. - sec.)|_d_CI|mm|12.9|Shortest distance through air|
|Creepage distance (pri. - sec.)|_d_Cp|mm|12.9|Shortest path along device body|
|Case material|-|-|V0|According to UL 94|
|Comparative tracking index|_CTI_||600||
|Application example<br>System voltage RMS||V|600|Reinforced insulation according to<br>IEC 61800-5-1, IEC 62109-1<br>CAT III, PD2|
|Application example<br>System voltage RMS||V|1000|Basic insulation according to<br>IEC 61800-5-1, IEC 62109-1<br>CAT III, PD2|



## **Environmental and mechanical characteristics** 

|**Parameter**|**Symbol**|**Unit**|**Min**|**Typ**|**Max**|**Comment**|
|---|---|---|---|---|---|---|
|Ambient operating temperature|_T_A|°C|−40||85||
|Ambient storage temperature|_T_A st|°C|−55||125||
|Mass|_m_|g||46|||



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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Electrical data** 

At _T_ A = 25 °C, _U_ C = +5 V, _N_ P = 1 turn, _R_ L = 10 kΩ internal reference unless otherwise noted (see Min, Max, typ. definition paragraph in page 6). Lines with a * in the comment column apply over the −40 … 85 °C ambient temperature range. 

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Parameter Symbol Unit Min Typ Max Comment<br>**----- End of picture text -----**<br>


|**Parameter**|**Parameter**|**Symbol**|**Unit**|**Min**|**Typ**|**Typ**|**Max**|**Comment**|**Comment**|
|---|---|---|---|---|---|---|---|---|---|
|||||||||||
|Primary nominal RMS current||_I_P N|A|||200||_*_||
|Primary current, measuring range||_I_P M|A|−450|||450|_*_||
|Supply voltage||_U_C|V|4.75||5|5.25|_*_||
|Current consumption||_I_C|mA||8 +|)<br>(<br>_N_<br>mA<br>_I_<br>S<br>P|)<br>(<br>_N_<br>mA<br>_I_<br>S<br>P<br>10 +||_N_S= 1500 turns|
|Reference voltage @_I_P= 0 A||_U_ref|V|2.485||2.5|2.515||Internal reference|
|Output voltage||_U_out|V|0.25|||4.75||with_U_C= +5 V|
|Output voltage @_I_P= 0 A||_U_out|V|||_U_ref||||
|Electrical ofset voltage||_U_O E|mV|−2.5|||2.5||100 % tested_U_out−_U_ref|
|Electrical ofset current referred to primary||_I_O E|mA|−800|||800||100 % tested|
|Temperature coefcient of_I_O E<br>referred to primary||_TCI_O E|A/K|−0.002|||0.002|_*_||
|Temperature coefcient of_U_ref||_TCU_ref|ppm/K||||±100|_*_|Internal reference|
|Temperature coefcient of_U_out @_I_P= 0 A||_TCU_out|ppm/K||||±2|_*_|ppm/K of 2.5 V|
|Nominal sensitivity||_S_N|mV/A||3.125||||625 mV/_I_P N|
|Sensitivity error||_εS_|% of_I_P N|−0.8|||0.8||100 % tested|
|Temperature coefcient of_S_||_TCS_|ppm/K||||75|_*_|ppm/k of_I_P N|
|Linearity error||_ε_L|% of_I_P N|−0.15|||0.15|||
|Magnetic ofset current (10 ×_I_P N)<br>referred to primary||_I_O M|mA|−208|||208|||
|Noise voltage spectral density<br>100 Hz … 100 kHz||_u_no|µV/Hz½||0.9|||||
|Peak-to-peak noise voltage<br>DC … 10 kHz<br>DC … 100 kHz<br>DC … 1 MHz||_U_no pp|mVpp||0.15<br>0.25<br>0.75|||||
|Primary current, detection threshold||_I_P Th|A|1.87 ×_I_P N|1.93 ×_I_P N||1.98 ×_I_P N|||
|Delay time of threshold output for high value||_t_D H Th|µs||1.4||2.2|_*_|Overcurrent detection<br>measured over<br>temperature|
|Delay time to 10 % of the fnal output value for<br>_I_P Nstep||_t_D 10|µs||||1||d_i_/d_t_= 70 A/µs|
|Delay time to 80 % of the fnal output value for<br>_I_P Nstep||_t_D 80|µs||||3||d_i_/d_t_= 70 A/µs|
|Frequency bandwidth (±3 dB)||_BW_|kHz|200||||||
|Total error||_ε_tot|% of_I_P N||||1.1||See formula note1)|
|Total error @_T_A = 85 °C||_ε_tot 85|% of_I_P N||||1.4||See formula note1)|
|Sum of sensitivity and linearity error||_εS _L|% of_I_P N||||0.83||See formula note2)|
|Sum of sensitivity and linearity error<br>@_T_A = 85 °C||_εS _L 85|% of_I_P N||||1.2||See formula note2)|
|(<br>)<br>_T_<br>_TCS_<br>ε<br>ε<br><br>=<br>+<br>+<br><br><br><br>tot<br>A<br>tot 25<br>Notes:<br>1)|_TCI_<br>_T_<br>_I_<br><br><br>×<br>−<br><br><br><br>O E<br>A<br>P N<br>25<br>(<br>)<br>_TCI_<br>_T_<br>_TCS_<br>_T_<br>_I_<br>O E<br>S L<br>A<br>S L 25<br>A<br>P N<br>25<br><br><br>=<br>+<br>+<br>×<br>−<br><br><br><br><br><br><br>ε<br>ε<br>2)|||||||||



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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Definition of typical, minimum and maximum values** 

Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values shown in “typical” graphs. 

On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower limits and a probability for measured values to lie within this interval. 

Unless otherwise stated (e.g. “100 % tested”), the LEM definition for such intervals designated with “min” and “max” is that the probability for values of samples to lie in this interval is 99.73 %. 

For a normal (Gaussian) distribution, this corresponds to an interval between −3 sigma and +3 sigma. If “typical” values are not obviously mean or average values, those values are defined to delimit intervals with a probability of 68.27 %, corresponding to an interval between −sigma and +sigma for a normal distribution. 

Typical, maximal and minimal values are determined during the initial characterization of the product. 

## **Maximum continuous DC primary current** 

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**----- Start of picture text -----**<br>
14°<br>50<br>°<br>40 -25 -10 5<br>T<br>I P<br>**----- End of picture text -----**<br>


The maximum continuous DC primary current plot shows the boundary of the area for which all the following conditions are true: 

- _I_ P < _I_ P M 

- ● Junction temperature _T_ J < 135 °C 

- Primary conductor temperature < 110 °C 

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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Typical performance characteristics** 

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**----- Start of picture text -----**<br>
10000<br>1000<br>100<br>10<br>1<br>10 [1] 10 [2] 10 [3] 10 [4] 10 [5] 10 [6]<br>f c (Hz)<br>1/2)<br>VRMS/ Hz<br>µ<br>  (<br>no<br>u<br>**----- End of picture text -----**<br>


Figure 1: Noise voltage spectral density referred to primary 

Figure 2: Frequency response 

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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Terms and definitions** 

## **Ampere-turns and amperes** 

The transducer is sensitive to the primary current linkage _Θ_ P (also called ampere-turns). 

_Θ_ P = _N_ P · _I_ P 

Where _N_ P is the number of primary turn (depending on the connection of the primary jumpers). 

Caution: As most applications will use the transducer with only one single primary turn ( _N_ P = 1), much of this datasheet is written in terms of primary current instead of current linkages. However, the ampere-turns (A) unit is used to emphasis that current linkages are intended and applicable. 

## **Sensitivity and linearity** 

To measure sensitivity and linearity, the primary current (DC) is cycled from 0 to _I_ P, then to − _I_ P and back to 0 (equally spaced _I_ P/10 steps). The sensitivity _S_ is defined as the slope of the linear regression line for a cycle between ± _I_ P N. 

The linearity error difference between the measured points and the linear _ε_ L is the maximum positive or negative regression line, expressed in % of _I_ P N. 

## **Simplified transducer model** 

The static model of the transducer with current output at temperature _T_ A is: 

_I_ S = _S_ · _Θ_ P · (1 + _ε_ ) 

In which (referred to primary): 

_ε_ · _Θ_ P = _I_ O E + _I_ O _T_ + _εS_ · _Θ_ P  + _εS T_ · _Θ_ P  + _ε_ L( _Θ_ P max) · _Θ_ P max + _I_ O M 

_Θ_ P = _N_ P · _I_ P : primary current linkage (A) 

_Θ_ P max :  maximum primary current linkage applied to the transducer 

_I_ S : secondary current (A) 

_S_ : sensitivity of the transducer 

_T_ A : ambient operating temperature (°C) 

- _I_ O E : electrical offset current (A) 

_I_ O M : magnetic offset current (A) _I_ O _T_ : temperature variation of _I_ O E (A) 

_εS_ : sensitivity error at 25 °C 

_εS T_ : thermal drift of _S ε_ L( _Θ_ P max) : linearity error for _Θ_ P max 

This model is valid for primary ampere-turns _Θ_ P between − _Θ_ P max and + _Θ_ P max only. This is the absolute maximum error. As all errors are independent, a more realistic way to calculate the error would be to use the following formula: 

**==> picture [36 x 26] intentionally omitted <==**

**----- Start of picture text -----**<br>
N<br>ε = ∑ε i 2<br>i =1<br>**----- End of picture text -----**<br>


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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Performance parameters definition** 

## **Magnetic offset referred to primary** 

## **Total error referred to primary** 

The magnetic offset current on the primary side (“memory effect” of the transducer’s ferro- _I_ O M is the consequence of a current magnetic parts). It is measured using the following primary current cycle. _I_ O M depends on the current value _I_ P _≥ I_ P N. 

The total error _ε_ tot is the error at ± _I_ P N, relative to the rated value 

_I_ P N. 

It includes all errors mentioned above 

- ●the electrical offset _I_ O E 

- ●the magnetic offset _I_ O M 

**==> picture [489 x 209] intentionally omitted <==**

**----- Start of picture text -----**<br>
Primary current cycle O M<br>1 ●the sensitivity error  ε S<br>●the linearity error  ε L (to  I P N).<br>Total error  ℇ tot<br>0 0.12 at  U C = ... V and  T A = 25 °C<br>aver. + 3σ<br>0.10<br>0.08<br>-1 oN] 1 2 3 4 5 0.06 aw I O M (max) /  I P N<br>Step =<br>0.04<br>: Overload factor 0.02 — ——_ I O E (max) /  I P N f<br>Figure 3:  Current cycle used to measure magnetic and electri-<br>cal offset (transducer supplied)  0.00 ee ee<br>I O M = I P (3)(3)3)) − I P (5)(5)5)) -0.02 -1 a -0.5 I P / ( K OL ee  ·  I P N) with  0 ee K OL = 1 ... 10 0.5 ee 1<br>)<br>N<br>P<br>I<br> ·<br> = 1 .. 10<br>OL OL<br>K K<br> / (<br>P<br>I with<br> (% ) I P N<br>tot<br>ℇ<br>**----- End of picture text -----**<br>


_K_ OL: Overload factor 

Figure 3:  Current cycle used to measure magnetic and electrical offset (transducer supplied) 

**==> picture [70 x 22] intentionally omitted <==**

**----- Start of picture text -----**<br>
I − I<br>I O M = P (3)(3)3)) 2 P (5)(5)5))<br>**----- End of picture text -----**<br>


## **Electrical offset referred to primary** 

Figure 5: Total error _ε_ tot 

Using the current cycle shown in figure 3, the electrical offset current _I_ O E is the residual output referred to primary when the input current is zero. 

**==> picture [83 x 20] intentionally omitted <==**

The temperature variation _I_ O _T_ of the electrical offset current _I_ O E is the variation of the electrical offset from 25 °C to the considered temperature 

. 

**==> picture [134 x 11] intentionally omitted <==**

## **Delay times** 

The delay time respect to the primary are shown in the next figure. _t_ D 10 @ 10 % and the delay time _t_ D 80 @ 80 % with Both slightly depend on the primary current d _i_ /d _t_ . They are measured at nominal current. 

**==> picture [158 x 115] intentionally omitted <==**

**----- Start of picture text -----**<br>
I<br>100 %<br>80 %<br>I P I S<br>t D 80<br>10 %<br>t D 10 t<br>**----- End of picture text -----**<br>


Figure 4: _t_ D 10 (delay time @ 10 %) and _t_ D 80 (delay time @ 80 %) 

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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Application information** 

## **Filtering and decoupling** 

## **Supply voltage** _U_ C 

The transducer has internal decoupling capacitors, but in the case of a power supply with high impedance, it is highly recommended to provide local decoupling (100 nF or more, located close to the transducer) as it may reduce disturbance on transducer output _U_ out  and reference _U_ ref due to high varying primary current. The transducer power supply rejection ratio is low at high frequency. 

## **Output** _U_ out 

The output _U_ out has a very low output impedance of typically 1 Ohm; it can drive capacitive loads of up to 100 nF directly. Adding series resistance R _f_ of several tenths of Ohms allows much larger capacitive loads C _f_ (higher than 1 µF). Empirical evaluation may be necessary to obtain optimum results. The minimum load resistance on _U_ out is 1 kOhm. 

## **Reference** _U_ ref 

Likewise output _U_ out, the _U_ ref has a very low output impedance of typically 1 Ohm; it can drive capacitive loads of up to 100 nF directly. Adding series resistance R _f_ of several tenths of Ohms allows much larger capacitive loads C _f_ (higher than 1 µF). Empirical evaluation may be necessary to obtain optimum results. The minimum load resistance on _U_ ref is 10 kOhms. 

## **Overcurrent detection definition** 

The overcurrent detection function generates an output signal to the OCD pin whenever the primary current exceeds a pre-programmed threshold value. Once the overcurrent event is detected, the CMOS-type OCD signal changes from low logic (< 30 % _U_ C) to high logic value (> 70 % _U_ C). In order to avoid undesirable glitches, the OCD signal is digitally filtered and the OCD signal output is held for 1 ms in high logic value after the last overcurrent event detection. 

**==> picture [278 x 100] intentionally omitted <==**

**----- Start of picture text -----**<br>
I P t hold OCD<br>[A] \ I—_—_———><br>Primary current, detection threshold I P Th<br>U out –  U ref<br>U out H<br>t D Th U out L<br>**----- End of picture text -----**<br>


|**Parameter**|**Symbol**|**Unit**|**Min**|**Typ**|**Max**|**Comment**|
|---|---|---|---|---|---|---|
|High-level output voltage|_U_out H|V|3.5|||With_U_C= +5 V and<br>source current of 3 mA|
|Low-level output voltage|_U_out L|V|||1.5|With_U_C= +5 V and<br>sink current of 3 mA|



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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **External reference voltage** 

The REF pin can be used either as a reference voltage output or as a reference voltage input. When used in reference voltage output, the internal reference voltage _U_ ref is used by the transducer as the reference point for bipolar measurements. 

The internal reference voltage output accuracy is defined in the electrical parameter data. When used in reference voltage input, an external reference voltage is connected to the REF pin. In this case, the maximum allowable reference voltage range is 0.5 V - 2.75 V. The REF pin must be able to source or sink an input current of 1.5 mA maximum. If the reference voltage is not used, the REF pin should be left unconnected. The following graph shows the _I_ P current versus forced extreme external _U_ ref. 

**==> picture [411 x 239] intentionally omitted <==**

**----- Start of picture text -----**<br>
600<br>400<br>200<br>2.75  V<br>0<br>-200<br>-400<br>-600<br>0.5 1 1.5 2 2.5 3<br>Uref (V)<br>(A)<br>IP<br>**----- End of picture text -----**<br>


Figure 6: Measuring range versus external _U_ ref 

Upper limit: _I_ P = 450 ( _U_ ref = 0.5 V ... 2.75 V) 

Lower limit: _I_ P = −311 * _U_ ref +72 ( _U_ ref = 0.5 V … 1.75 V) _I_ P = −450 ( _U_ ref = 1.75 V … 2.75 V) 

_Example with U_ ref _= 1.65 V:_ The transducer has a measuring range from −448 A to +450 A. 

_Example with U_ ref _= 0.5 V:_ The transducer has a measuring range from −80 A to +450 A. 

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12April2022/Version 2 

**LZSR 200-P/SP1** 

**PCB footprint according to the product** (in mm) 

**==> picture [76 x 120] intentionally omitted <==**

## **Assembly on PCB** 

- ●Recommended PCB hole di ~~am~~ ete ~~r~~ 

1 ~~m~~ m f ~~o~~ r ~~s~~ econd ~~ary~~ pin 

   - 2 mm for retention pin 

- ●Maximum PCB thickness 

   - 2.9 mm 

- ~~●Wave soldering~~ profile maximum 260 °C for 10 s ~~No clean proce~~ ss o ~~nly~~ 

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12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Dimensions** (in mm) 

**==> picture [512 x 402] intentionally omitted <==**

**----- Start of picture text -----**<br>
Connection<br>U C<br>R M U out<br>U ref<br>**----- End of picture text -----**<br>


## **M** ~~**echanical characteristic**~~ 

- ●Genera ~~l~~ tolerance 

±0.6 ~~mm~~ 

## ~~**Remark**~~ **s** 

- ~~I~~ t is advised to use a primary conductor (busbar) that fills transducer through-hole. 

- ●Be aware of the influence of the external field if nearby transducers are too close (relay, capacitor, choke...). 

- ●Installation of the transducer must be done, unless otherwise specified on the datasheet, according to LEM Transducer Generic Mounting Rules. Please refer to LEM document N°ANE120504 available on our web site: . 

- **https://www.lem.com/en/file/3137/download/** 

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

12April2022/Version 2 

**LZSR 200-P/SP1** 

## **Packaging information** 

Standard delivery in cardboard:  L × W × H: 300 × 200 × 200 mm Each cardboard contains 60 parts, placed into 4 Polystyrene-made trays of 15 parts each one. Both trays and cardboard are ESD-compliant. The typical weight of the cardboard is 3 Kg. 

Page 14/14 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. 

12April2022/Version 2