Current Transducer LA 55-TP IPN = 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). 16016 Electrical data IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance @ with ± 12 V with ± 15 V ISN KN VC IC 50 0 .. ± 70 TA = 70°C TA = 85°C RM min RM max RM min RM max @ ± 50 A max @ ± 70 A max @ ± 50 A max @ ± 70 A max 10 10 50 50 Secondary nominal r.m.s. current Conversion ratio Supply voltage (± 5 %) Current consumption 100 50 160 90 60 95 60 1) 60 1) 135 155 135 2) 135 2) A A ε Accuracy @ IPN , TA = 25°C Ω Ω Ω Ω 50 mA 1 : 1000 ± 12 .. 15 V 10 (@ ± 15 V) + IS mA @ ± 15 V (± 5 %) @ ± 12 .. 15 V (± 5 %) Linearity error L ± 0.65 ± 0.90 < 0.15 Typ % % % Max ± 0.2 ± 0.3 ± 0.5 ± 0.6 IO IOM IOT Offset current @ IP = 0, TA = 25°C Residual current 3) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO 0°C .. + 70°C - 25°C .. + 85°C ± 0.1 ± 0.1 tra tr di/dt f Reaction time @ 10 % of IP max Response time 4) @ 90 % of IP max di/dt accurately followed Frequency bandwidth @ 30A (- 3 dB) < 500 < 2.5 > 200 DC .. 100 mA mA mA mA ns µs A/µs kHz General data TA TS RS Ambient operating temperature Ambient storage temperature Secondary coil resistance @ m Mass Standards Notes : 1) 2) 3) 4) TA = 70°C TA = 85°C • Closed loop (compensated) current transducer using the Hall effect Accuracy - Dynamic performance data X Features - 25 .. + 85 °C - 40 .. + 90 °C 80 Ω 85 Ω 24 g EN 50178 : 1997 • Printed circuit board mounting • Insulated 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 applications. Application Domain • Industrial Measuring range limited to ± 60 A max Measuring range limited to ± 55 A max Result of the coercive field of the magnetic circuit With a di/dt of 100 A/µs. 060126/7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM Page 1/3 w w w .lem.com Current Transducer LA 55-TP Isolation characteristics Vd Vb R.m.s. voltage for AC isolation test, 50 Hz, 1 mn R.m.s. rated voltage 2.5 600 kV V dCp dCl CTI Creepage distance Clearance distance Comparative Tracking Index (Group IIIa) Min 6.9 6.1 175 mm mm Application examples According to EN 50178 and IEC 61010-1 standards and following conditions : • Over voltage category OV 3 • Pollution degree PD2 • Non-uniform field EN 50178 IEC 61010-1 Rated isolation voltage Nominal voltage Single isolation 600 V 600 V Reinforced isolation 300 V 300 V dCp, dCI 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. 060126/7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM Page 2/3 w w w .lem.com Dimensions LA 55-TP (in mm. 1 mm = 0.0394 inch) Bottom view Left view Connection Standard 00 or N° SP.. Year Week Front view Mechanical characteristics • General tolerance • Fastening & connection of primary Recommended PCB hole • Fastening & connection of secondary Recommended PCB hole Remarks ± 0.2 mm bus bar 6.4 x 1.6 mm 3.8 mm 3 pins 0.63 x 0.56 mm 0.9 mm • IS is positive when IP flows in the direction of the arrow. • Temperature of the primary conductor should not exceed 90°C. • This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. 060126/7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM Page 3/3 w w w .lem.com