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Ref: CKSR 6-NP, CKSR 15-NP, CKSR 25-NP, CKSR 50-NP · PDF fileRef: CKSR 6-NP, CKSR 15-NP, CKSR 25-NP, CKSR 50-NP For the electronic measurement of current: DC, AC, pulsed..., with

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Text of Ref: CKSR 6-NP, CKSR 15-NP, CKSR 25-NP, CKSR 50-NP · PDF fileRef: CKSR 6-NP, CKSR 15-NP, CKSR...

  • Page 1/14

    13March2012/version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

    Current Transducer CKSR series IPN = 6, 15, 25, 50 A

    Ref: CKSR 6-NP, CKSR 15-NP, CKSR 25-NP, CKSR 50-NP

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

    Features Closed loop (compensated) multi-range

    current transducer Voltage output Single supply Isolated plastic case material recognized

    according to UL 94-V0 Compact design for PCB mounting.

    Advantages Very low temperature coefficient of offset Very good dv/dt immunity Higher creepage / clearance distances Reduced height Reference pin with two modes: Ref IN and Ref OUT Extended measuring range for unipolar measurement.

    Applications AC variable speed 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 Solar inverters.

    Standards EN 50178 UL 508 IEC 61010-1 (safety).

    Application Domain Industrial.

  • Page 2/14

    13March2012/version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

    CKSR seriesAbsolute maximum ratings

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

    Isolation characteristics

    Parameter Symbol Unit Value Comment

    RMS voltage for AC isolation test 50/60Hz/1 min Vd kV 4.3

    Impulse withstand voltage 1.2/50 s Vw kV 8

    Partial discharge extinction voltage @ 10 pC (rms) Ve V 1000

    Clearance distance (pri. - sec.) dCI mm 8.2 Shortest distance through air

    Creepage distance (pri. - sec.) dCp mm 8.2 Shortest internal path along device body

    Case material - - V0 according to UL 94

    Comparative tracking index CTI V 600

    Application example - - 300 V CAT III PD2

    Reinforced isolation, non uniform field according to EN 61010

    Application example - - 600 V CAT III PD2

    Reinforced isolation, non uniform field according to EN 50178

    Application example - - 1000 V CAT III PD2

    Simple isolation, non uniform field according to EN 50178

    According to UL 508: primary potential involved in Volts RMS AC or DC

    - V 600For use in a pollution degree 2 environment

    Environmental and mechanical characteristics

    Parameter Symbol Unit Min Typ Max Comment

    Ambient operating temperature TA C -40 105

    Ambient storage temperature TS C -55 105

    Mass m g 9

    Standards EN 50178, IEC 60950-1, IEC 61010-1, IEC 61326-1, UL 508

    Parameter Symbol Unit Value

    Supply voltage VC V 7

    Primary conductor temperature C 110

    Maximum primary current IP max A 20 x IPN

    ESD rating, Human Body Model (HBM) kV 4

  • Page 3/14

    13March2012/version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

    CKSR series

    Parameter Symbol Unit Min Typ Max Comment

    Primary nominal current rms IPN A 6Apply derating according to fig. 25

    Primary current, measuring range IPM A -20 20

    Number of primary turns NP - 1,2,3,4

    Supply voltage VC V 4.75 5 5.25

    Current consumption IC mA 15 + 20 + NS = 1731 turns

    Reference voltage @ IP = 0 A VREF V 2.495 2.5 2.505 Internal reference

    External reference voltage VREF V 0 4

    Output voltage VOUT V 0.375 4.625

    Output voltage @ IP = 0 A VOUT V VREFElectrical offset voltage

    VOE mV -5.3 5.3100% tested VOUT - VREF

    Electrical offset current referred to primary IOE mA -51 51 100% tested

    Temperature coefficient of VREF TCVREF ppm/K 5 50 Internal reference

    Temperature coefficient of VOUT @ IP = 0 A

    TCVOUT ppm/K 6 14ppm/K of 2.5 V - 40C .. 105C

    Theoretical sensitivity Gth mV/A 104.2 625 mV/ IPN

    Sensitivity error G % -0.7 0.7 100% testedTemperature coefficient of G TCG ppm/K 40 - 40C .. 105C

    Linearity error L % of IPN -0.1 0.1Magnetic offset current (10 x IPN) referred to primary IOM A -0.1 0.1

    Output current noise (spectral density) rms100 Hz .. 100 kHz referred to primary

    ino A/Hz 20 RL = 1 k

    Peak-peak output ripple at oscillator frequency f = 450 kHz (typ.)

    - mV 40 160 RL = 1 k

    Reaction time @ 10 % of IPN tra s 0.3 RL = 1 k, di/dt = 18 A/s

    Response time @ 90 % of IPN tr s 0.3 RL = 1 k, di/dt = 18 A/s

    Frequency bandwidth ( 1 dB) BW kHz 200 RL = 1 k

    Frequency bandwidth ( 3 dB) BW kHz 300 RL = 1 k

    Overall accuracy XG % of IPN 1.7

    Overall accuracy @ TA = 85C (105C) XG % of IPN 2.2

    Accuracy X % of IPN 0.8

    Accuracy @ TA = 85C (105C) X % of IPN 1.4

    Electrical data CKSR 6-NPAt TA = 25C, VC = + 5 V, NP = 1 turn, RL = 10 k, internal reference, unless otherwise noted.

    IP (mA) NS

    IP (mA) NS

  • Page 4/14

    13March2012/version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

    CKSR seriesElectrical data CKSR 15-NPAt TA = 25C, VC = + 5 V, NP = 1 turn, RL = 10 k, internal reference, unless otherwise noted.

    Parameter Symbol Unit Min Typ Max Comment

    Primary nominal current rms IPN A 15 Apply derating according to fig. 26

    Primary current, measuring range IPM A -51 51

    Number of primary turns NP - 1,2,3,4

    Supply voltage VC V 4.75 5 5.25

    Current consumption IC mA 15 + 20 + NS = 1731 turns

    Reference voltage @ IP = 0 A VREF V 2.495 2.5 2.505 Internal reference

    External reference voltage VREF V 0 4

    Output voltage VOUT V 0.375 4.625

    Output voltage @ IP = 0 A VOUT V VREFElectrical offset voltage VOE mV -2.21 2.21 100% tested

    VOUT - VREFElectrical offset current referred to primary IOE mA -53 53 100% tested

    Temperature coefficient of VREF TCVREF ppm/K 5 50 Internal reference

    Temperature coefficient of VOUT @ IP = 0 A

    TCVOUT ppm/K 2.3 6ppm/K of 2.5 V - 40C .. 105C

    Theoretical sensitivity Gth mV/A 41.67 625 mV/ IPNSensitivity error G % -0.7 0.7 100% testedTemperature coefficient of G TCG ppm/K 40 - 40C .. 105C

    Linearity error L % of IPN -0.1 0.1

    Magnetic offset current (10 x IPN) referred to primary IOM A -0.1 0.1

    Output current noise (spectral density) rms 100 Hz .. 100 kHz referred to primary

    ino A/Hz 20 RL = 1 k

    Peak-peak output ripple at oscillator frequency f = 450 kHz (typ.)

    - mV 15 60 RL = 1 k

    Reaction time @ 10 % of IPN tra s 0.3 RL = 1 k, di/dt = 44 A/s

    Response time @ 90 % of IPN tr s 0.3 RL = 1 k, di/dt = 44 A/s

    Frequency bandwidth ( 1 dB) BW kHz 200 RL = 1 k

    Frequency bandwidth ( 3 dB) BW kHz 300 RL = 1 k

    Overall accuracy XG % of IPN 1.2

    Overall accuracy @ TA = 85C (105C) XG % of IPN 1.5

    Accuracy X % of IPN 0.8

    Accuracy @ TA = 85C (105C) X % of IPN 1.2

    IP (mA) NS

    IP (mA) NS

  • Page 5/14

    13March2012/version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

    CKSR seriesElectrical data CKSR 25-NPAt TA = 25C, VC = + 5 V, NP = 1 turn, RL = 10 k, internal reference, unless otherwise noted.

    Parameter Symbol Unit Min Typ Max Comment

    Primary nominal current rms IPN A 25 Apply derating according to fig. 27

    Primary current, measuring range IPM A -85 85

    Number of primary turns NP - 1,2,3,4

    Supply voltage VC V 4.75 5 5.25

    Current consumption IC mA 15 + 20 + NS = 1731 turns

    Reference voltage @ IP = 0 A VREF V 2.495 2.5 2.505 Internal reference

    External reference voltage VREF V 0 4

    Output voltage VOUT V 0.375 4.625

    Output voltage @ IP = 0 A VOUT V VREFElectrical offset voltage

    VOE mV -1.35 1.35100% tested VOUT - VREF

    Electrical offset current referred to primary IOE mA -54 54 100% tested

    Temperature coefficient of VREF TCVREF ppm/K 5 50 Internal reference

    Temperature coefficient of VOUT @ IP = 0 A

    TCVOUT ppm/K 1.4 4ppm/K of 2.5 V - 40C .. 105C

    Theoretical sensitivity Gth mV/A 25 625 mV/ IPNSensitivity error G % -0.7 0.7 100% testedTemperature coefficient of G TCG ppm/K 40 - 40C .. 105C

    Linearity error L % of IPN -0.1 0.1

    Magnetic offset current (10 x IPN) referred to primary

    IOM A -0.1 0.1

    Output current noise (spectral density) rms 100 Hz .. 100 kHz referred to primary

    ino A/Hz 20 RL = 1 k

    Peak-peak output ripple at oscillator frequency f = 450 kHz (typ.)

    - mV 10 40 RL = 1 k

    Reaction time @ 10 % of IPN tra s 0.3 RL = 1 k, di/dt = 68 A/s

    Response time @ 90 % of IPN tr s 0.3 RL = 1 k, di/dt = 68 A/s

    Frequency bandwidth ( 1 dB) BW kHz 200 RL = 1 k

    Frequency bandwidth ( 3 dB) BW kHz 300 RL = 1 k

    Overall accuracy XG % of IPN 1

    Overall accuracy @ TA = 85C (105C)

    XG % of IPN 1.35

    Accuracy X % of IPN 0.8

    Accuracy @ TA = 85C (105C) X % of IPN 1.15

    IP (mA) NS

    IP (mA) NS

  • Page 6/14

    13March2012/version 7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com

    CKSR series

    Parameter Symbol Unit Min Typ Max Comment

    Primary nominal current rms IPN A 50Apply derating according to fig. 28

    Primary current, measuring range IPM A -150 150

    Number of primary turns NP - 1,2,3,4

    Supply voltage VC V 4.75 5 5.25

    Current consumption IC mA 15 + 20 + NS = 966 turns

    Reference voltage

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