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| Current Transducer LA 55-TP 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 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 A max @ 70 A max @ 50 A max @ 70 A max 50 0 .. 70 TA = 70C TA = 85C RM min RM max RM min RM max 10 10 50 50 100 50 160 90 60 95 60 1) 60 1) 135 155 135 2) 135 2) A A Features * Closed loop (compensated) current * Printed circuit board mounting * Insulated plastic case recognized according to UL 94-V0. transducer using the Hall effect Secondary nominal r.m.s. current Conversion ratio Supply voltage ( 5 %) Current consumption 50 mA 1 : 1000 12 .. 15 V 10 (@ 15 V) + IS mA 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 = 25C L @ 15 V ( 5 %) @ 12 .. 15 V ( 5 %) Linearity error Offset current @ IP = 0, TA = 25C Residual current 3) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO 0C .. + 70C - 25C .. + 85C Reaction time @ 10 % of IP max Response time 4) @ 90 % of IP max di/dt accurately followed Frequency bandwidth @ 30A (- 3 dB) 0.65 0.90 < 0.15 Typ Max 0.2 0.3 0.5 0.6 % % % mA mA mA mA ns s A/s kHz IO IOM IOT tra tr di/dt f Applications * AC variable speed drives and servo * Static converters for DC motor drives * Battery supplied applications * Uninterruptible Power Supplies * Switched Mode Power Supplies * Power supplies for welding applications. (SMPS) (UPS) motor drives 0.1 0.1 < 500 < 2.5 > 200 DC .. 100 General data TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ Mass Standards - 25 .. + 85 C - 40 .. + 90 C 80 85 24 g EN 50178 : 1997 TA = 70C TA = 85C Application Domain * Industrial Notes : 1) 2) 3) 4) 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/s. 060126/7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. Page 1/3 LEM w w w .lem.com Current Transducer LA 55-TP Isolation characteristics Vd Vb dCp dCl CTI R.m.s. voltage for AC isolation test, 50 Hz, 1 mn R.m.s. rated voltage Creepage distance Clearance distance Comparative Tracking Index (Group IIIa) 2.5 600 Min 6.9 6.1 175 kV V 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 dCp, dCI Single isolation Reinforced isolation Rated isolation voltage 600 V 300 V IEC 61010-1 Nominal voltage 600 V 300 V 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. Page 2/3 LEM w w w .lem.com Dimensions LA 55-TP Bottom view (in mm. 1 mm = 0.0394 inch) 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 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 Remarks * IS is positive when IP flows in the direction of the arrow. * Temperature of the primary conductor should not exceed * This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. 90C. 060126/7 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. Page 3/3 LEM w w w .lem.com |
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