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| Current Transducer LTC 1000-SF 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 = 1000 A Electrical data IPN IP IP RM Primary nominal r.m.s. current Primary current, measuring range @ 24 V Max overload not measurable Measuring resistance with 15 V with 24 V ISN KN VC IC Vd Ve @ 1000 A max @ 1200 A max @ 1000 A max @ 2000 A max 1000 A 0 .. 2400 1) A 10 / 10 kA/ms RM min RM max 0 0 0 0 15 7 50 7 mA V mA kV kV kV Features * Closed loop (compensated) current transducer using the Hall effect * Insulated plastic case recognized according to UL 94-V0 * Transducer delivered with feet * Railway equipment. 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 R.m.s. voltage for partial discharge extinction 200 1 : 5000 15 .. 24 < 30 (@24V) +IS 13.4 2) 1.5 3) > 2.8 4) 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. Accuracy - Dynamic performance data XG Overall accuracy @ IPN , TA = 25C @ IPN , TA = - 40C .. + 85C Linearity Offset current @ IP = 0, TA = 25C Thermal drift of IO Response time 5) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 1 dB) < 0.4 <1 < 0.1 Max 0.5 1 <1 > 100 DC .. 100 % % % mA mA s A/s kHz L Applications * AC variable speed drives and servo motor drives IO IOT tr di/dt f - 40C .. + 85C * 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 = 85C Mass Standards 1) 2) 3) 4) 5) * Switched Mode Power Supplies (SMPS) - 40 .. + 85 C - 45 .. + 90 C 44 780 g EN 50155 (01.12.20) * Power supplies for welding applications. Notes : With a di/dt of > 5 A/s Between primary and secondary + shield Between secondary and shield Test carried out with a busbar 40 mm centred in the through-hole With a di/dt of 100 A/s. 030528/0 LEM Components w w w.lem.com Dimensions LTC 1000-SF (in mm. 1 mm = 0.0394 inch) Front view Left view Secondary terminals Terminal + : supply voltage + 15 .. 24 V Terminal M : measure Terminal - : supply voltage - 15 .. 24 V Terminal E : shield Connection or Top view Mechanical characteristics * General tolerance * Fixing the transducer Fastening torque max * Primary through-hole * Connection of secondary Fastening torque max 1 mm 4 slots 6.5 mm 4 screws M6 5 Nm 42 mm M5 threaded studs 2.2 Nm or 1.62 Lb.-Ft. Faston 6.3 x 0.8 mm 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. * 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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