LA55-P_07

Current Transducer LA 55-P 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 16019 Electrical data IPN IPM RM Primary nominal current rms Primary current, measuring range Measuring resistance @ with ± 12 V with ± 15 V ISN KN VC IC Vd @ ± 50 A maxi @ ± 70 A maxi @ ± 50 A maxi @ ± 70 A maxi 50 0 .. ± 70 TA = 70°C TA = 85°C RM mini RM maxi RM mini RM maxi 10 10 50 50 100 50 160 90 60 95 60 1) 6 01) 135 155 135 2) 1 35 2) A A Features • Closed loop (compensated) current transducer using the Hall effect Ω Ω Ω Ω • Printed circuit board mounting • Isolated plastic case recognized according to UL 94-V0. Secondary nominal current rms Conversion ratio Supply voltage (± 5 %) Current consumption Rms voltage for AC isolation test, 50 Hz, 1 min 50 mA 1 : 1000 ± 12 .. 15 V 10 (@ ± 15 V) + IS mA 2.5 kV 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 capability. Accuracy - Dynamic performance data X Accuracy @ IPN , TA = 25°C L ε @ ± 15 V (± 5 %) @ ± 12 .. 15 V (± 5 %) Linearity error Offset current @ IP = 0, TA = 25°C Magnetic offset current 3) @ IP = 0 and specified RM after an overload of 3 x I PN Temperature variation of IO 0°C .. + 70°C - 25°C .. + 85°C Reaction time @ 10 % of IPN Response time @ 90 % of IPN Step di/dt accurately followed Frequency bandwidth (- 1 dB) ± 0.65 ± 0.90 < 0.15 Typ Maxi ± 0.2 ± 0.3 ± 0.5 ± 0.6 % % % mA mA mA mA ns µs A/µs kHz IO IOM IOT tra tr di/dt BW Applications • AC variable speed drives and servo motor drives ± 0.1 ± 0.1 < 500 200 DC .. 200 • Static converters for DC motor drives • Battery supplied applications • Uninterruptible Power Supplies (UPS) • Switched Mode Power Supplies (SMPS) • Power supplies for welding General data TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ Mass Standards 1) 2) 3) applications. - 25 .. + 85 - 40 .. + 90 80 85 18 EN 50178: 1997 °C °C Ω Ω g Application Domain • Industrial. TA = 70°C TA = 85°C Notes : Measuring range limited to ± 60 A maxi Measuring range limited to ± 55 A maxi Result of the coercive field of the magnetic circuit. page 1/2 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 070103/11 w w w .lem.com Dimensions LA 55-P (in mm. 1 mm = 0.0394 inch) Left view Bottom view Model + N° SP Connection Front view Mechanical characteristics • General tolerance • Primary through-hole • Fastening & connection of secondary Recommended PCB hole ± 0.2 mm 12.7 x 7 mm 3 pins 0.63 x 0.56mm 0.9 mm 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. Remarks • IS is positive when IP flows in the direction of the arrow. • Temperature of the primary conductor should not exceed 90°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. • This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. 070103/11 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. page 2/2 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. w w w .lem.com