LA50-S

Current Transducer LA 50-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 = 50 A 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 @ ± 50 A max @ ± 100 A max 50 0 .. ± 100 RM min RM max 0 0 25 1 : 2000 ± 15 10 + IS 3 330 100 A A Ω Ω mA V mA kV Features • Closed loop (compensated) current transducer using the Hall effect • Insulated plastic case recognized according to UL 94-V0. Secondary nominal r.m.s. current Conversion ratio Supply voltage (± 5 %) Current consumption R.m.s. voltage for AC isolation test, 50 Hz, 1 min Special features • IP = 0 .. ± 100 A • K N = 1 : 2000 Accuracy - Dynamic performance data XG Advantages ± 0.5 < 0.1 Typ Max ± 0.1 ± 0.4 % % mA mA µs A/µs kHz ε L Overall accuracy @ IPN, TA = 25°C Linearity Offset current @ IP = 0, TA = 25°C Thermal drift of IO Response time 1) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 1 dB) IO IOT tr di/dt f - 10°C .. + 70°C ± 0.2 50 DC .. 150 • • • • • • • 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. General data TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ TA = 70°C Mass Standards 2) - 10 .. + 70 - 25 .. + 85 130 45 EN 50178 °C °C Ω 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) With a di/dt of 50 A/µs A list of corresponding tests is available. 991014/5 LEM Components w w w .lem.com Dimensions LA 50-S/SP1 Front view (in mm. 1 mm = 0.0394 inch) Left view Secondary terminals Terminal Terminal Terminal Terminal + M 0 : : : : supply voltage + 15 V supply voltage - 15 V measure NC Connection Top view Mechanical characteristics • • • • General tolerance Fastening Primary through-hole Connection of secondary ± 0.2 mm 2 holes ∅ 3.2 mm 12.7 x 6.35 mm Molex 5045-04/AG Remarks • IS is positive when IP flows in the direction of the arrow. • Temperature of the primary conductor should not exceed 100°C. • Dynamic performances (di/dt and response time) are best with a single bar completely filling the primary hole. • In order to achieve the best magnetic coupling, the primary windings have to be wound over the top edge of the device. • To measure nominal currents of less than 50 A, the optimum accuracy is obtained by having several primary turns (nominal current x number of turns < 50 At). LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.