Current Transducer LA 125-P I = 125 A PN 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). 16030 Electrical data I Primary nominal current rms 125 A Features PN I Primary current, measuring range 0 .. 200 A PM R Measuring resistance T = 70C T = 85C Closed loop (compensated) current M A A R R R R transducer using the Hall effect M mini M maxi M mini M maxi Printed circuit board mounting with 12 V 125 A 5 52 14 50 maxi Isolated plastic case recognized 200 A 5 20 14 18 maxi according to UL 94-V0. with 15 V 125 A 25 74 40 72 maxi 1) 1) 200 A 25 34 40 40 maxi Advantages I Secondary nominal current rms 125 mA SN K Conversion ratio 1 : 1000 N Excellent accuracy V Supply voltage ( 5 %) 12 .. 15 V C Very good linearity I Current consumption 16 ( 15 V) + I mA C S Low temperature drift Optimized response time Accuracy - Dynamic performance data Wide frequency bandwidth X Accuracy I , T = 25C 15 V ( 5 %) 0.60 % No insertion losses PN A 12 .. 15 V ( 5 %) 0.80 % High immunity to external e Linearity error < 0.15 % interference L Current overload capability. Typ Maxi I Offset current I = 0, T = 25C 0.40 mA O P A 2) Applications I Magnetic offset current I = 0 and specified R , OM P M after an overload of 3 x I 0.50 mA PN AC variable speed drives and servo I Temperature variation of I 0C .. + 70C 0.15 0.50 mA OT O motor drives - 40C .. + 85C 0.30 0.95 mA Static converters for DC motor drives t Reaction time 10 % of I < 500 ns ra PN Battery supplied applications 3) 4) t Response time to 90 % of I step < 1 s r PN Uninterruptible Power Supplies 4) di/dt di/dt accurately followed > 200 A/s (UPS) 4) BW Frequency bandwidth (- 1 dB) DC .. 100 kHz Switched Mode Power Supplies (SMPS) General data Power supplies for welding T Ambient operating temperature - 40 .. + 85 C A applications. T Ambient storage temperature - 40 .. + 90 C S R Secondary coil resistance T = 70C 32 S A Application Domain T = 85C 33.5 A m Mass 40 g Industrial. Standards EN 50178: 1997 1) Notes: Measuring range limited to 180 A maxi 2) The result of the coercive field of the magnetic circuit. 3) With a di/dt of 100 A/s 4) The primary conductor is best filling the through-hole and/or the return of the primary conductor is above the top of the transducer. page 1/3 070806/12 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. www.lem.comCurrent Transducer LA 125-P Isolation characteristics V Rms voltage for AC isolation test, 50/60 Hz, 1 min 3 kV d V Impulse withstand voltage 1.2/50 s 7 kV w Mini dCp Creepage distance 6.7 mm dCl Clearance distance 6.7 mm CTI Comparative Tracking Index (Group IIIa) 175 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 dCp, dCI, Rated isolation voltage Nominal voltage V W Single isolation 600 V 600 V Reinforced isolation 300 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 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. page 2/3 070806/12 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. www.lem.com