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| Current Transducer LA 03..20-PB For the electronic measurement of currents: DC, AC, pulsed, mixed, with a galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). IPN = 3 .. 20 A Electrical data Primary nominal r.m.s. current 1) IPN (A) 3 5 10 15 20 Primary current, measuring range IP (A) 4.5 7.5 15 22.5 30 Primary Current Limitation 3) (A) 3 3 5 7.5 10 Primary Conductor Diameter (mm) 0.5 0.5 0.65 0.8 1.0 Type Features * Closed loop (compensation) current transducer using the Hall effect LA LA LA LA LA 03-PB 05-PB 10-PB 15-PB 20-PB * Voltage output * Printed circuit board mounting VC IC R IS VOUT RL Supply voltage ( 5 %) Current consumption app. Isolation resistance @ 500 VDC Output voltage @ IPN, RL = 10 k, TA = 25C Load resistance 15 V 20mA + IPN/1200mA > 500 M 4 V > 10 k 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 capacity Accuracy-Dynamic performance data X L VOE VOH VOT TC G tr f Accuracy @ IPN, TA = 25C (without offset) Linearity error (0 .. IPN) Electrical offset voltage, TA = 25C Hysteresis offset voltage @ IP = 0; after an excursion of 1 x IPN Thermal drift of VOE (-10..+80C) (-20..-10C) Thermal drift of the gain (% of reading) (-10..+80C) (-20..-10C) Response time @ 90% of IP Frequency bandwidth (- 1dB)2) < 1.5 < 1 < 30 < 15 < 1 < 2 < 0.04 < 0.08 <3 DC .. 150 % of IPN % of IPN mV mV mV/K mV/K %/K %/K s kHz 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 m Ambient operating temperature Ambient storage temperature Mass - 20 .. + 80 - 30 .. + 85 < 12 C C g * Switched Mode Power Supplies (SMPS) * Power supplies for welding applications Notes : 1) 2) 3) Calibration for 4V output is carried out at the primary norminal r.m.s. current. Derating is needed to avoid excessive core heating at high frequency. Primary current is limited by primary wire size. Permanent primary current should not exceed the specified value. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. 051102/6 Page 1/3 LEM Industrial www.lem.com Current transducer LA 03..20-PB Isolation characteristics Vd dCp dCl CTI R.m.s. voltage for AC isolation test, 50 Hz, 1 mn Creepage distance Clearance distance Comparative Tracking Index (Group IIIa) 2.5 4) > 10 > 10 > 220 kV mm mm Application examples According to EN 50178 and CEI 61010-1 standards and following conditions : * Over voltage category * Pollution degree PD2 * Non-uniform field OV 3 EN 50178 dCp, dCl, Vw Single isolation Reinforced isolation Rated isolation voltage 1000 V 500 V CEI 61010-1 Nominal voltage Cat III 1000 V rms Cat III 300 V rms Notes : 4) Between primary and secondary 051102/6 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. Page 2/3 LEM Industrial www.lem.com Dimensions LA 03..20-PB (in mm. 1 mm = 0.0394 inch) Front V ie w 19 +/-1 Right V ie w 15 +/-1 20 +/-1 0.5 2 4321 Primary Conductor See the attached table 6 4-0.5*0.25 6 +/-1 Bottom V ie w 5 11 +/-1 Signal Pins 4321 3-p=2.54 T erminal Pin Identification Primary Conductor Part No. Diameter LA 03-PB 03-P 0.5 d LA 05-PB 05-P 0.5 d LA 10-PB 10-P 0.65 d LA 15-PB 15-P 0.8 d LA 20-PB 20-P 1.0 d Signal Pins 1 2 3 4 -Vcc 0V +Vcc Output Direction of Current Flow 2.5 +/-1 5 (+) 6 +/-1 6 (-) Safety This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the following 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. 051102/6 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. Page 3/3 LEM Industrial 4.5 +/-1 www.lem.com |
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