Current Transducer LA 03 .. 20-PB IPN = 3 .. 20 A 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). Preliminary Electrical data Primary nominal r.m.s. current IPN (A) Primary current measuring range IP (A) 3 5 10 15 20 VC IC Vd R IS VOUT RL ± 4.5 ± 7.5 ± 15 ± 22.5 ± 30 Primary Conductor Diameter (mm) 0.5 0.5 0.65 0.8 1.0 Type • Closed loop (compensation) current transducer using the Hall effect LA 03-PB LA 05-PB LA 10-PB LA 15-PB LA 20-PB 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 MΩ Output voltage @ ± IPN, RL = 10 kΩ, TA = 25°C ±4 V Load resistance > 10 kΩ Accuracy-Dynamic performance data X ε L VOE VOH VOT TCε G tr f Accuracy @ IPN, TA = 25°C (without offset) Linearity (0 .. ± IPN) Electrical offset voltage, TA = 25°C 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) Features < ± 1.5 % of IPN < ± 1 % of IPN < ± 30 mV < ± 15 mV ± 1 mV/K < 0.04 %/K <3 µs DC .. 150 kHz • Voltage output • Printed circuit board mounting 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 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 General data TA TS m Ambient operating temperature Ambient storage temperature Mass (SMPS) - 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 Right View 19 +/-1 2 2 1 Primary Conductor See the attached table 6 +/-1 5 11 +/-1 6 Bottom View 4-0.5*0.25 Signal Pins 3-p=2.54 2.5 +/-1 4 3 6 +/-1 4.5 +/-1 0.5 20 +/-1 15 +/-1 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 -Vcc 2 0V 3 +Vcc 4 Output Direction of Current Flow 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.