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Current Transducer LF 205-S 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 @ 15 V R.m.s. voltage for AC isolation test, 50 Hz, 1 mn 100 1 : 2000 12 .. 15 17 + I S 3.5 Accuracy - Dynamic performance data XG L Overall accuracy @ IPN , TA = 25C Linearity 0.5 < 0.1 % % mA mA mA ns s A/s kHz IO I OM IOT tra tr di/dt f Typ Max Offset current @ IP = 0, TA = 25C 0.2 Residual current 1) @ IP = 0, after an overload of 3 x IPN 0.1 Thermal drift of IO - 40C .. + 85C 0.12 0.4 Reaction time @ 10 % of IPN Response time 2) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 3 dB) < 500 <1 > 100 DC .. 100 Applications * AC variable speed drives and servo motor drives * 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 78 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. 021125/10 LEM Components w w w.lem.com Dimensions LF 205-S (in mm. 1 mm = 0.0394 inch) Bottom view Right view Model + SP N Front view Back view Top view Connection Mechanical characteristics * General tolerance * Transducer fastening Vertical position Fastening torque, max 0.2 mm 2 holes 4.3 mm 2 M4 steel screws 3.2 Nm or 2.36 Lb. - Ft. 4 holes 4.3 mm 4 M4 steel screws 3.2 Nm or 2.36 Lb. - Ft. 4 holes 2.25 mm depth 6 mm 4 x PT KA25 screws long 6 mm 0.7 Nm or 0.52 Lb. - Ft. 15.5 mm Molex 5045-03/AG Remarks * IS is positive when IP flows in the direction of the arrow. * Temperature of the primary conductor should not exceed 100C. * Dynamic performances (di/dt and response time) are best with a single bar completely filling the primary hole. * Transducer fastening Horizontal position Fastening torque, max or Fastening torque, max * This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. * Primary through-hole * Connection of secondary LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. |
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