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| Current Transducer LB 500-S/SP1 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 = 500 A Preliminary Electrical data IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance with 15 V ISN KN VC IC Vd @ 500 A max @ 750 A max 500 0 .. 750 RM min RM max 5 5 200 1 : 2500 15 20 + IS 6 1) 33 15 A A mA V mA kV Features * Closed loop (compensated) current transducer using the Hall effect * Insulated plastic case recognized according to UL 94-V0. Special features * VC = 15 ( 5 %) V * K N = 1 : 2500 * Low thermal offset drift with temperature Secondary nominal r.m.s. current Conversion ratio Supply voltage ( 5 %) Current consumption R.m.s. voltage for AC isolation test, 50 Hz, 1 mn Accuracy - Dynamic performance data X * Better zero crossing performance * TA = + 10C .. + 50C * Shield between primary and secondary connected to VC " - " L Accuracy @ IPN, TA = 25C Linearity Offset current @ IP = 0, TA = 25C Thermal drift of IO + 10C .. + 50C Response time 2) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 1 dB) Zero crossing distortion 0.5 < 0.1 Typ % % Max 0.500 mA 0.064 mA s A/s kHz 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. IO IOT tr di/dt f <1 > 50 DC .. 150 negligeable General data TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ TA = 50C Mass Standards + 10 .. + 50 - 25 .. + 85 30 670 EN 50178 C C g 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 Notes : 1) 2) Between primary and secondary. With a di/dt of 100 A/s * HVDC transmisions. 990803/2 LEM Components w w w .lem.com Dimensions LB 500-S/SP1 Right view (in mm. 1 mm = 0.0394 inch) Front view Secondary terminals Terminal + : supply voltage + 15 V Terminal M : measure Terminal - : supply voltage - 15 V Connection Top view Mechanical characteristics * * * * General tolerance Fastening Primary through-hole Connection of secondary Fastening torque 0.5 mm 4 slots 6.5 mm 25 mm M5 threaded studs 2.2 Nm or 1.62 Lb. - Ft. Remarks * IS is positive when IP flows in the direction of the arrow. * Temperature of the primary conductor should not exceed 70C. * Dynamic performances (di/dt and response time) are best with a single bar completely filling the primary hole. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. |
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