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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 Preliminary Electrical data Primary nominal r.m.s. current IPN (A) 3 5 10 15 20 Primary current measuring range IP (A) 4.5 7.5 15 22.5 30 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 03-PB LA 05-PB LA 10-PB LA 15-PB LA 20-PB * Voltage output * Printed circuit board mounting VC IC Vd R IS VOUT RL Supply voltage ( 5 %) 15 V Current consumption app. 20mA+ IPN/1200 mA R.m.s. voltage for AC isolation test, 50/60Hz,1mn 2.5 kV Isolation resistance @ 500 VDC > 500 M Output voltage @ IPN, RL = 10 k, TA = 25C 4 V Load resistance > 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 (0 .. IPN) Electrical offset voltage, TA = 25C Hysteresis offset voltage @ IP = 0; after an excursion of 1 x IPN Thermal drift of VOE max. Thermal drift(% of reading) Response time @ 90% of IP Frequency bandwidth (- 1dB)1) < 1.5 % of IPN < 1 % of IPN < 30 mV < 15 mV 1 mV/K < 0.04 %/K <3 s DC .. 150 kHz Applications * AC variable speed drives and servo motor drives * Static converters for DC motor drives * Battery supplied applications * Uninterruptible Power Supplies * Switched Mode Power Supplies (SMPS) (UPS) General data TA TS m Ambient operating temperature Ambient storage temperature Mass - 10 .. + 80 C - 15 .. + 85 C < 12 g * Switched Mode Power Supplies (SMPS) * Power supplies for welding applications Notes : 1) EN 50178 approval pending Derating is needed to avoid excessive core heating at high frequency. 010118/2 LEM Components www.lem.com LA 03 ... 20-PB Front View 19 +/-1 Right View 15 +/-1 20 +/-1 0.5 4.5 +/-1 2 43 21 Primary Conductor See the attached table 6 4-0.5*0.25 6 +/-1 Bottom View 5 11 +/-1 Signal Pins 3-p=2.54 Terminal Pin Identification Primary Conductor Part No. Diameter PB LA 03-P 0.5 d LA 05-P PB 0.5 d PB LA 10-P 0.65 d LA 15-P PB 0.8 d LA 20-P PB 1.0 d Signal Pins 1 2 3 4 -Vcc 0V +Vcc Output Direction of Current Flow 2.5 +/-1 5 (+) 6 (-) UNIT : mm SCALE : 2/1 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. 6 +/-1 |
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