IPN Current Transducer LA 55-P = 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). 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 0 .. ± 70 TA = 70°C TA = 85°C RM mini RM maxi RM mini RM maxi @ ± 50 A maxi @ ± 70 A maxi @ ± 50 A maxi @ ± 70 A maxi 10 10 50 50 100 50 160 90 Secondary nominal current rms Conversion ratio Supply voltage (± 5 %) Current consumption Rms voltage for AC isolation test, 50 Hz, 1 min A A • Closed loop (compensated) current transducer using the Hall effect Ω Ω Ω Ω 60 95 60 1) 601) 135 155 135 2) 135 2) 50 mA 1 : 1000 ± 12 .. 15 V 10 (@ ± 15 V) + IS mA 2.5 kV Accuracy - Dynamic performance data X ε Accuracy @ IPN , TA = 25°C @ ± 15 V (± 5 %) @ ± 12 .. 15 V (± 5 %) Linearity error L ± 0.65 ± 0.90 < 0.15 Typ IO IOM IOT tra tr di/dt BW % % % Maxi ± 0.2 mA ± 0.3 ± 0.5 ± 0.6 mA mA mA 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 ± 0.1 ± 0.1 Reaction time @ 10 % of IPN Response time @ 90 % of IPN Step di/dt accurately followed Frequency bandwidth (- 1 dB) < 500 <1 > 200 DC .. 200 Features ns µs A/µs kHz • Printed circuit board mounting • Isolated plastic case recognized according to UL 94-V0. 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. 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 (SMPS) • Power supplies for welding General data applications. TA TS RS Ambient operating temperature Ambient storage temperature Secondary coil resistance @ m Mass Standards Notes: 1) 2) 3) TA = 70°C TA = 85°C - 25 .. + 85 - 40 .. + 90 80 85 18 EN 50178: 1997 °C °C Ω Ω g Application Domain • Industrial. 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 070103/11 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. 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 Safety ± 0.2 mm 12.7 x 7 mm 3 pins 0.63 x 0.56mm 0.9 mm 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. 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 070103/11 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. w w w .lem.com