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| Current Transducer LF 205-P For the electronic measurement of currents : DC, AC, pulsed..., with a galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). IPN = 200 A Electrical data IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance @ with 12 V with 15 V ISN KN VC IC Vd @ 200 A max @ 420 A max @ 200 A max @ 420 A max 200 0 .. 420 TA = 70C TA = 85C RM min RM max RM min RM max 0 0 0 0 71 14 100 28 0 0 23 23 69 12 98 26 A A Features * Closed loop (compensated) current transducer using the Hall effect mA V mA kV * Insulated plastic case recognized according to UL 94-V0. Advantages * * * * * * * Excellent accuracy Very good linearity Low temperature drift Optimized response time Wide frequency bandwidth No insertion losses High immunity to external interference * Current overload capability. Secondary nominal r.m.s. current Conversion ratio Supply voltage ( 5 %) Current consumption @ 15V R.m.s. voltage for AC isolation test, 50 Hz, 1 mn 100 1 : 2000 12 .. 15 17 + IS 3.5 Accuracy - Dynamic performance data XG L Overall accuracy @ IPN , TA = 25C Linearity 0.5 < 0.1 Max 0.2 0.1 0.4 % % mA mA mA ns s A/s kHz IO I OM IOT tra tr di/dt f Typ Offset current @ IP = 0, TA = 25C Residual current 1) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO - 40C .. + 85C 0.12 Reaction time @ 10 % of IP max Response time2) @ 90 % of IP max di/dt accurately followed Frequency bandwidth (- 3 dB) Applications * AC variable speed drives and servo motor drives < 500 <1 > 100 DC .. 100 * Static converters for DC motor drives * Battery supplied applications * Uninterruptible Power Supplies (UPS) General data TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ TA = 70C @ TA = 85C Mass Standards 3) - 40 .. + 85 - 40 .. + 90 33 35 58 EN 50178 C C g * Switched Mode Power Supplies (SMPS) * Power supplies for welding applications. Notes : 1) 2) 3) The result of the coercive field of the magnetic circuit With a di/dt of 100 A/s A list of corresponding tests is available. 011120/2 LEM Components w w w.lem.com Dimensions LF 205-P (in mm. 1 mm = 0.0394 inch) Bottom view Secondary terminals Terminal + : supply voltage + 12 .. 15 V Terminal M : measure Terminal - : supply voltage - 12 .. 15 V Front view Left view Back view Connection Top view Mechanical characteristics * General tolerance * Fastening & secondary connection Recommanded PCB hole 0.2 mm 3 pins 0.63x0.56 mm 0.9 mm 15.5 mm 2 holes 1.75 mm 2.4 mm KA22 x 6 47.30.60.006.0 Remarks * IS is positive when IP flows in the direction of the arrow. * Temperature of the primary conductor should not exceed 100C. * Primary through-hole * Supplementary fastening Recommended PCB hole Recommended screws LEM code * Dynamic performances (di/dt and response time) are best with a single bar completely filling the primary hole. * This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. |
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