Current Transducer LTS 25-NP I = 25 At PN For the electronic measurement of currents: DC, AC, pulsed, mixed with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). 16054 Electrical data Features Closed loop (compensated) multi- I Primary nominal current rms 25 At PN range current transducer using I Primary current, measuring range 0 .. 80 At PM the Hall effect V Output voltage (Analog) I 2.5 (0.625I /I ) V OUT P P PN 1) Unipolar voltage supply I = 0 2.5 V P Isolated plastic case recognized G Sensitivity 25 mV/A according to UL 94-V0 N Number of secondary turns ( 0.1 %) 2000 S Compact design for PCB R Load resistance 2 kW L mounting R Internal measuring resistance ( 0.5 %) 50 W IM Incorporated measuring TCR Temperature coefficient of R < 50 ppm/K IM IM resistance V Supply voltage ( 5 %) 5 V C 2) Extended measuring range. I Current consumption V = 5 V Typ 28+I +(V /R ) mA C C S OUT L Advantages Accuracy - Dynamic performance data Excellent accuracy X Accuracy I , T = 25C 0.2 % Very good linearity PN A Accuracy with R I , T = 25C 0.7 % Very low temperature drift IM PN A Linearity error < 0.1 % Optimized response time L Wide frequency bandwidth Typ Max No insertion losses TCV Temperature coefficient of V I = 0 - 10C .. + 85C 50 100 ppm/K OUT OUT P High immunity to external - 40C .. - 10C 150 ppm/K 3) interference TCG Temperature coefficient of G - 40C .. + 85C 50 ppm/K Current overload capability. V Magnetic offset voltage I = 0, OM P after an overload of 3 x I 0.5 mV PN Applications 5 x I 2.0 mV PN 10 x I 2.0 mV AC variable speed drives and PN t Reaction time 10 % of I < 100 ns servo motor drives ra PN t Response time to 90 % of I step < 400 ns Static converters for DC motor r PN di/dt di/dt accurately followed > 60 A/s drives BW Frequency bandwidth (0 .. - 0.5 dB) DC .. 100 kHz Battery supplied applications (- 0.5.. 1 dB) DC .. 200 kHz Uninterruptible Power Supplies (UPS) Switched Mode Power Supplies General data (SMPS) Power supplies for welding T Ambient operating temperature - 40 .. + 85 C A applications. T Ambient storage temperature - 40.. + 100 C S m Mass 10 g Application domain Standards EN 50178: 1997 IEC 60950-1: 2001 Industrial. 1) Notes: Absolute value T = 25C, 2.475 < V < 2.525 OUT A 2) I = I /N S P S 3) Only due to TCR . IM Page 1/3 110209/22 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.comCurrent Transducer LTS 25-NP Isolation characteristics V Rms voltage for AC isolation test, 50 Hz, 1 min 3 kV d V Impulse withstand voltage 1.2/50 s > 8 kV w Min V Rms voltage for partial discharge extinction 10pC > 1.5 kV e 1) dCp Creepage distance 15.5 mm 2) dCI Clearance distance 6.35 mm CTI Comparative Tracking Index (group IIIa) 175 1) Notes: On housing 2) On PCB with soldering pattern UTEC93-703. Applications 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, V Rated insulation voltage Nominal voltage w Single insulation 600 V 600 V Reinforced insulation 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 manufacturers 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 build-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 110209/22 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com