Current Transducer LA 50-S/SP1 IPN = 50 A 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). 0634 Electrical data Features IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance with ± 15 V ISN KN VC IC @ ± 50 A max @ ± 100 A max Secondary nominal r.m.s. current Conversion ratio Supply voltage (± 5 %) Current consumption 50 0 .. ± 100 RM min RM max A A 0 0 Ω Ω 330 100 25 1 : 2000 ± 15 10 + IS • Closed loop (compensated) current transducer using the Hall effect • Insulated plastic case recognized according to UL 94-V0. mA Special features V mA • IP = 0 .. ± 100 A • K N = 1 : 2000 Advantages Accuracy - Dynamic performance data XG ε Overall accuracy @ IPN, TA = 25°C Linearity error L ± 0.5 < 0.1 Typ IO IOT Offset current @ IP = 0, TA = 25°C Thermal drift of IO tr di/dt f Response time 1) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 1 dB) - 10°C .. + 70°C ± 0.2 % % Max ± 0.1 ± 0.4 <1 > 50 DC .. 150 mA mA µs A/µs kHz • • • • • • • 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. Applications General data • AC variable speed drives and servo motor drives TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ TA = 70°C Mass Standards - 10 .. + 70 °C - 25 .. + 85 °C 130 Ω 45 g EN 50178 : 1997 • Static converters for DC motor drives • Battery supplied applications • Uninterruptible Power Supplies (UPS) • Switched Mode Power Supplies (SMPS) • Power supplies for welding applications. Application domain Note : 1) With a di/dt of 50 A/µs. • Industrial. 060911/7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM Page 1/3 w w w .lem.com Current Transducer LA 50-S/SP1.... Isolation characteristics Vd Vw R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn Impulse withstand voltage 1.2/50 µs 4 >7.4 kV kV dCp dCl CTI Creepage distance Clearance distance Comparative Tracking Index (Group II) Min 8.70 7.40 400 mm mm Application examples According to EN 50178 and IEC 61010-1 standards and following conditions : • Over voltage category OV 3 • Pollution degree PD2 • Non-uniform field EN 50178 IEC 61010-1 Rated isolation voltage Nominal voltage Single isolation 600 V 600 V Reinforced isolation 300 V 300 V dCp, dCI, V W Safety This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer's operating instructions. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a built-in device, whose conducting parts must be inaccessible after installation. A protective housing or additional shield could be used. Main supply must be able to be disconnected. 060911/7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM Page 2/3 w w w .lem.com Dimensions LA 50-S/SP1 (in mm. 1 mm = 0.0394 inch) Left view Front view Connection Rep. Clearance Creepage A-B 7.40 mm 8.70 mm Top view Mechanical characteristics • General tolerance • Transducer fastening Recommended fastening torque • Primary through-hole • Connection of secondary Remarks ± 0.2 mm 2 holes ∅ 3.2 mm 2 M3 steel screws 1.1 Nm or 0.80 Lb.-Ft. 12.7 x 6.35 mm Molex 5045-04/AG • 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). 060911/7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM Page 3/3 w w w .lem.com