page 1/3 110211/12 lem reserves the right to carry out modifcations on its transducers, in order to improve them, without prior notice www.lem.com current transducer ltsr 6-np for the electronic measurement of currents: dc, ac, pulsed, mixed, with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). electrical data i pn primary nominal current rms 6 at i pm primary current, measuring range 0 .. 19.2 1) at ? p overload capability 250 at v out output voltage (analog) @ i p 2.5 (0.625 i p / i pn ) v i p = 0 2.5 2) v v ref reference voltage (internal reference), ref out mode 2.5 3) v reference voltage (external reference), ref in mode 1.9 .. 2.7 4) v g sensitivity 104.16 mv/a n s number of secondary turns ( 0.1 %) 2000 r l load resistance 2 k w c l max maximum capacitive loading 500 pf r im internal measuring resistance ( 0.5 %) 208.33 w tcr im temperature coeffcient of r im < 50 ppm/k v c supply voltage ( 5 %) 5 v i c current consumption @ v c = 5 v typ 28+ i s 5) +( v out r / l ) ma accuracy - dynamic performance data x accuracy @ i pn , t a = 25c 0.2 % accuracy with r im @ i pn , t a = 25c 0.7 % e l linearity error < 0.1 % max tcv out temperature coeffcient of v out / v ref @ i p = 0 - 40c .. + 85c 150 ppm/k tcg temperature coeffcient of g - 40c .. + 85c 50 6) ppm/k v om magnetic offset voltage @ i p = 0, after an overload of 3 x i pn 7 mv 5 x i pn 8 mv 10 x i pn 10 mv tcv ref temperature coeffcient of internal v ref @ i p = 0 - 10c .. + 85c 50 ppm/k - 40c .. - 10c 100 ppm/k t ra reaction time @ 10 % of i pn < 100 ns t r response time to 90 % of i pn step < 400 ns di/dt di/dt accurately followed > 15 a/s bw frequency bandwidth (0 .. - 0.5 db) dc .. 100 khz (- 0.5 .. 1 db) dc .. 200 khz notes : 1) only in ref out mode or with external ref less than 2.525 v and greater than 2.475 v. for external ref out of these limits see leafet. 2) v out is linked to v ref , by conception the difference between these two nodes for i p = 0 is maximum 25 mv, 2.475 v < v out < 2.525 v. 3) in ref out mode at t a = 25c, 2.475 v< v ref < 2.525 v. the minimal impedance loading the ref pin should be > 220 k w . internal impedance = 600 w . for most applications you need to buffer this output to feed it into an adc for example. 4) to overdrive the ref (1.9 v .. 2.7 v) max 1 ma is needed. 5) i s = i p / n s . 6) only due to tcr im . features closed loop (compensated) multirange current transducer using the hall effect unipolar voltage supply isolated plastic case recognized according to ul 94-v0 compact design for pcb mounting incorporated measuring resistance extended measuring range access to the internal voltage reference possibility to feed the transducer reference from external supply. 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. 16073 i pn = 6 at
page 2/3 110211/12 lem reserves the right to carry out modifcations on its transducers, in order to improve them, without prior notice www.lem.com current transducer ltsr 6-np general data t a ambient operating temperature - 40 .. + 85 c t s ambient storage temperature - 40 .. + 100 c insulating material group iii a m mass 10 g standards 1) en 50178: 1997 iec 60950-1: 2001 isolation characteristic v d rms voltage for ac isolation test, 50 hz, 1 min 3 kv v w impulse withstand voltage 1.2/50 s > 8 kv min v e rms voltage for partial discharge extinction 10 pc > 1.5 kv min d cp creepage distance 2) 15.35 mm d ci clearance distance 3) 6.2 mm c ti comparative tracking index (group iiia) 175 applications examples according to en 50178 and cei 61010-1 standards and following conditions: over voltage category ov 3 pollution degree pd2 non-uniform feld notes : 1) specifcation according to iec 1000-4-8 not adhered to in dc, error according to two axes 1.5% instead of 1% 2) on housing 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. en 50178 eic 61010-1 dcp, dci, rated insulation voltage nominal voltage single insulation 600 v 600 v reinforced insulation 300 v 300 v v w
page 3/3 110211/12 lem reserves the right to carry out modifcations on its transducers, in order to improve them, without prior notice www.lem.com dimensions ltsr 6-np (in mm.) operation principle mechanical characteristics general tolerance 0.2 mm fastening & connection of primary 6 pins 0.8 x 0.8 mm recommended pcb hole 1.3 mm fastening & connection of secondary 4 pins 0.5 x 0.35 mm recommended pcb hole 0.8 mm additional primary through-hole ? 3.2 mm remarks v out swings above the 2.5 v offset when i p fows from terminals 1, 2, 3 to terminals 4, 5, 6 (with the arrow) for the emc, the acceptance criteria are available on request temperature of the primary conductor should not exceed 100c. note : 1) output voltage when ltsr 6-np is used with internal reference. output voltage - primary current - i pm - i pn i pm i pn 0 v out [ v ] [ at ] i p 4.5 5 2.5 3.125 0.5 1.875 number of primary turns primary nominal current rms i pn [ a ] nominal 1) output voltage v out [ v ] primary resistance r p [ m w ] primary insertion inductance l p [ h ] recommended connections 1 6 2.5 0.625 0.18 0.013 6 5 4 out in 1 2 3 2 3 2.5 0.625 0.81 0.05 6 5 4 out in 1 2 3 3 2 2.5 0.625 1.62 0.12 6 5 4 out in 1 2 3
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