LF 210-S/SP3

**Current Transducer** ~~**LF 21**~~ **0-S/SP3** 

## _I_ **= 100 A** P N 

For the electronic measurement of ~~c~~ urrent: DC, AC, pulsed..., with galvani ~~c~~ separation between the primary and the secondary circuit. 

## **Features** 

- ●Bipolar and insulated current measurement 

- ●Current output 

- ●Closed loop (compensated) current transducer 

- ●Panel mounting. 

## **Special features** 

- _I_ P N = 100 A 

- _I_ P M = 0 ... ±200 A 

- _N_ S = 1000 turns. 

## **Advantages** 

- ●High accuracy 

- ●Very low offset drift over temperature. 

## **Applica** ~~**t**~~ **io** ~~**n**~~ **s** 

- ●Wind ~~m~~ ill inverters 

- ●Test and measurement 

- ●AC variable speed and servo motor drives 

- ●Static converters for DC motors drives 

- ●Battery supplied applications 

- ~~●Uninterruptible Power Supplies (UPS)~~ 

- ●Switched Mode Power Supplies (SMPS) 

- ●Power supplies for welding applications. 

## **Standards** 

- ●IEC 61010-1: 2010 

- ●IEC 61800-5-1: 2007 

- ●IEC 62109-1: 2010 

- ●UL 508: 2013. 

## **Application Domain** 

- ●Industrial. 

N°97.J9.44.003.0 

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24April2020/Version 4 

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

LEM International SA Chemin des Aulx 8 1228 PLAN-LES-OUATES Switzerland www.lem.com 

**LF 210-S/SP3** 

## **Absolute maximum ratings** 

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


||**Symbol**|**Unit**|**Unit**|
|---|---|---|---|
|||||
|Maximum supply voltage (working) (−40 °C … 85 °C)|±_U_C max|V|±15.75|
|Maximum primary conductor temperature|_T_Bmax|°C|100|
|Maximum steady state primary current (−40 °C … 85 °C)|_I_P N max|A|100|



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: 9 

## **Standards** 

- ●USR indicates investigation to the Standard for Industrial Control Equipment UL 508. 

- ●CNR indicates investigation to the Canadian standard for Industrial Control Equipment CSA C22.2 No. 14-13. 

## **Ratings** 

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


|**Parameter**|**Unit**|**Value**|
|---|---|---|
||||
|Primary involved potential|V AC/DC|1500|
|Maximum surrounding air temperature|°C|85|
|Primary current|A|0 ... 100|
|Secondary supply voltage|V DC|0 ... ±15.75|
|Secondary current|mA|0 ... 100|



## **Conditions of acceptability** 

When installed in the end-use equipment, with primary feedthrough potential involved of 1500 V AC/DC, consideration shall be given to the following: 

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

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

- _3 -  Low voltage control circuit shall be supplied by an isolating source (such as transformer, optical isolator, limiting impedance or electro-mechanical relay)._ 

- _4 -  Based on the temperature test performed on LF 210-S series, the primary bar or conductor shall not exceed 100 °C in the end use application._ 

- _5 -  LF 210-S series shall be used in a pollution degree 2._ 

## **Marking** 

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

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24April2020/Version 4 

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

**LF 210-S/SP3** 

## **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|3.5|Type test|
|Impulse withstand voltage 1.2/50 µs|_U_Ni|kV|8.8|According to IEC 61800-5-1|
|Partial discharge RMS test voltage (qm < 10 pC)|_U_t|kV|1.65|Test carried out with a<br>non insulated bar and completely flling<br>the primary hole.<br>According to IEC 61800-5-1|
|Clearance (pri. - sec.)|_d_CI|mm|10.2|Shortest distance through air|
|Creepage distance (pri. - sec.)|_d_Cp|mm|11|Shortest path along device body|
|Application example<br>Rated insulation RMS voltage|_U_Nm|V|1000|Basic insulation according to<br>IEC 61800-5-1, CAT III, PD2<br>(table value)|
|Application example<br>Rated insulation RMS voltage|_U_Nm|V|300|Reinforced insulation according to<br>IEC 61800-5-1, CAT III, PD2<br>(table value)|
|Case material|-|-|V0|According to UL 94|
|Comparative tracking index|_CTI_||600||



## **Environmental and mechanical characteristics** 

|**Parameter**|**Symbol**|**Unit**|**Min**|**Typ**|**Max**|**Comment**|
|---|---|---|---|---|---|---|
|Ambient operating temperature|_T_A|°C|−40||85||
|Ambient storage temperature|_T_S|°C|−50||90||
|Mass|_m_|g||75|||



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24April2020/Version 4 

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

**LF 210-S/SP3** 

## **Electrical data** 

At _T_ A = 25 °C, ± _U_ C = ±15 V, _R_ M = 1 Ω, unless otherwise noted. Lines with a * in the conditions column apply over the −40 … 85 °C ambient temperature range. 

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


|**Parameter**|**Symbol**|**Unit**|**Min**|**Typ**|**Max**|**Conditions**|**Conditions**|
|---|---|---|---|---|---|---|---|
|||||||||
|Primary nominal RMS current|_I_P N|A|||100|*||
|Primary current, measuring range|_I_P M|A|−200||200|*|With ±_U_C= ±15 V<br>For other conditions, see Figure 1|
|Measuring resistance|_R_M|Ω|01)|||*|Max value of_R_Mis given in Figure 1|
|Secondary nominal RMS current|_I_S N|A|−0.1||0.1|*||
|Resistance of secondary winding|_R_S|Ω|||8.5||_R_S(_T_A) =_R_S× (1 + 0.004 × (_T_A+ ∆temp−25))<br>Estimated temperature increase<br>@_I_P Nis ∆temp = 15 °C|
|Secondary current|_I_S|A|−0.2||0.2|*||
|Number of secondary turns|_N_S|||1000||||
|Nominal sensitivity|_S_N|mA/A||1||||
|Supply voltage|±_U_C|V|±11.4||±15.75|*||
|Current consumption|_I_C|mA||33 +_I_S<br>35 +_I_S|||±_U_C= ±12 V<br>±_U_C= ±15 V|
|Ofset current, referred to primary|_I_O|A|−0.15||0.15|||
|Temperature variation of_I_O,<br>referred to primary|_I_O_T_|A|−0.2||0.2|*||
|Magnetic ofset current (@ 3 ×_I_P N),<br>referred to primary|_I_O M|A||±0.2||||
|Sensitivity error|_εS_|%|−0.15||0.15|*||
|Linearity error|_ε_L|% of_I_P N|−0.05||0.05|*||
|Total error at_I_P N|_ε_tot|% of_I_P N|−0.2<br>−0.2||0.2<br>0.2|*|25 … 85 °C<br>−40 … 85 °C|
|RMS noise current referred to primary|_I_no|mA||20|||1 Hz to 100 kHz (see Figure 4)|
|Delay time @ 10 % of_I_P N|_t_D 10|µs||< 0.5|||0 to 200 A, 75 A/µs,_R_M= 10 Ω|
|Delay time @ 90 % of_I_P N|_t_D 90|µs||< 0.5|||0 to 200 A, 75 A/µs,_R_M= 10 Ω (see Figure 2)|
|Frequency bandwidth|_BW_|kHz||100|||_R_M= 50 Ω; −3 dB|



Note:[1)] Other values of minimum values according to conditions of use are given in Figure 1. 

## **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, minimum and maximum values are determined during the initial characterization of the product. 

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24April2020/Version 4 

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

**LF 210-S/SP3** 

## **Typical performance characteristics** 

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**----- Start of picture text -----**<br>
300 300<br>R max U C  = 11.4 V @ 70 °C R max U C  = 11.4 V @ 85 °C<br>250 R R maxmin U U CC   = 15.75 V @ 70 °C   = 14.25 V @ 70 °C 250 R R maxmin U U CC   = 12.6 V @ 85 °C   = 14.25 V @ 85 °C<br>R min U C  = 15.75 V @ 85 °C<br>200<br>200<br>150<br>150<br>1 00 A, 125 Ω<br>1 00 A, 124      Ω<br>100 100 A, 96 Ω<br>100 100 A, 96            Ω<br>50<br>50 100 A, 47 Ω<br>100 A, 16 Ω<br>0 100 A, 15     Ω<br>0<br>0 50 100 150 200 250 0 50 100 150 200 250<br>I P (A) I P (A)<br>Figure 1: Maximum measuring resistance<br>R M max =  N S  × U C min  I − 0.3 V  P   −  R S max− 4.1 Ω<br>Noise Voltage Spectral Density<br>−11 5<br>−12 0<br>−12 5<br>−13 0<br>−13 5<br>−14 0<br>−14 5<br>−15 0<br>−15 5<br>Input 100 A /div −16 0<br>Output 50 mA/div<br>0 10 20 30Time ( µ s)40 50 60 70 −1610 5 0 101 102 103 104 105 106 107<br>f c (Hz)<br>  (Ω) R M   (Ω) R M<br>1/2)<br> (dB V RMS/ Hz<br>no<br>u<br>**----- End of picture text -----**<br>


Figure 2:  Typical delay time (0 to 200 A , 75 A/µs, with _R_ M = 10 Ω) 

Figure 3:  RMS noise voltage referred to primary _u_ no with _R_ M = 10 Ω 

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**----- Start of picture text -----**<br>
10−1 Total RMS noise current in the frequency range [1...10] MHz<br>To calculate the noise in a frequency band  f 1 to  to  f 2, the formula<br>is:<br>10−2 I no ( f 1 …  f 2) =     I no ( f 2) [2]  −  I no ( f 1) [2]<br>with  I no ( f ) read from figure 4 (typical, RMS value).<br>10−3 Example:<br>What is the noise from 10 [3]  to 10 [6]  Hz?<br>10−4 Figure 4 gives and  I no (10 [6]  Hz) = 50 mA. I no (10 [3]  Hz) = 3 mA<br>The output RMS noise current is therefore:<br>10−5 0 1 2 3 4 5 6 7 (50 × 10-3)2 - (3 × 10-3)2 = 50 mA referred to primary<br>10 10 10 10 10 10 10 10<br>f c (Hz)<br>Figure 4:  RMS noise current referred to primary<br>with  R M  =  10 Ω<br>)rms<br>(A<br>I no<br>Primary referred<br>**----- End of picture text -----**<br>


To calculate the noise in a frequency band _f_ 1 to  to _f_ 2, the formula is: 

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24April2020/Version 4 

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

**LF 210-S/SP3** 

## **Typical performance characteristics continued** 

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0.1<br>0.05<br>0<br>−0.05<br>−0.1<br>−500 −400 −300 −200 −100 0 100 200 300 400 500<br>Primary Current (A)<br>)Linearity error (% of  I P N<br>**----- End of picture text -----**<br>


Figure 5: Linearity 

## **Performance parameters definition** 

## **Sensitivity and linearity** 

To measure sensitivity and linearity, the primary current (DC) is cycled from 0 to _I_ P M, then to − _I_ P M and back to 0 (equally spaced _I_ P M/10 steps). 

The sensitivity _S_ is defined as the slope of the linear regression line for a cycle between ± _I_ P M. 

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

## **Magnetic offset** 

The magnetic offset _I_ O M is the change of offset after a given current has been applied to the input. It is included in the linearity error as long as the transducer remains in its measuring range. 

## **Electrical offset** 

The electrical offset current _I_ O E is the residual output current when the input current is zero. 

## **Total error** 

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. 

## **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 90 @ 90 % with Both slightly depend on the primary current d _i_ /d _t_ . They are measured at nominal current. 

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I<br>100 %<br>90 %<br>I P IS<br>t D 90<br>10 %<br>t D 10 t<br>**----- End of picture text -----**<br>


Figure 6: _t_ D 10 (delay time @ 10 %) and _t_ D 90 (delay time @ 90 %) 

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24April2020/Version 4 

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

**LF 210-S/SP3** 

## **Dimensions (in mm)** 

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**----- Start of picture text -----**<br>
d Cl d Cp<br>Connection<br>I P I S R M<br>U C<br>U C<br>**----- End of picture text -----**<br>


## **Mechanical characteristics** 

- ●General tolerance 

±0.3 mm 

- ●Transducer fastening 

2 holes ⌀ 4.3 mm 2 M4 steel screws 2.1 N ⋅ m (±10 %) 

- Vertical position 

- Recommended fastening torque 

- ●Transducer fastening 

4 holes ⌀ 4.3 mm 4 M4 steel screws 2.1 N·m (±10 %) MOLEX 6410 ⌀ 15.59 mm 

- Horizontal position 

- Recommended fastening torque 

- ●Connection of secondary 

- ●Primary through hole 

## **Remarks** 

- _I_ S is positive when _I_ P flows in the direction of arrow. 

- ●The secondary cables also have to be routed together all the way. 

- ●Installation of the transducer is to be done without primary current or secondary voltage present. 

- ●Maximum temperature of primary conductor: see page 2. 

- ●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.** 

## **Safety** 

This transducer must be used in limited-energy secondary circuits according to IEC 61010-1. 

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 (e.g. primary connection, power supply). 

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

This transducer is a build-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. 

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