Current Transducer LA 305-S I = 300 A PN For the electronic measurement of currents: DC, AC, pulsed..., with galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). 16173 Electrical data Features Closed loop (compensated) I Primary nominal current rms 300 A PN current transducer using the Hall I Primary current, measuring range 0 .. 500 A PM effect T = 70C T = 85C A A Isolated plastic case recognized R Measuring resistance R R R R M M min M max M min M max according to UL 94-V0. with 12 V 300 A 0 52 0 50 max 500 A 0 17 0 15 max Advantages with 15 V 300 A 0 75 5 73 max 500 A 0 31 5 29 Excellent accuracy max I Secondary nominal current rms 120 mA Very good linearity SN K Conversion ratio 1 : 2500 Low temperature drift N V Supply voltage ( 5 %) 12 .. 15 V Optimized response time C I Current consumption 20 ( 15 V) + I mA Wide frequency bandwidth C S No insertion losses Accuracy - Dynamic performance data High immunity to external interference X Overall accuracy I , T = 25C 0.8 % Current overload capability. G PN A Linearity error < 0.1 % L Applications Typ Max I Offset current I = 0, T = 25C 0.20 mA O P A AC variable speed drives and 1) I Magnetic offset current I = 0 and specified R , mA OM P M servo motor drives after an overload of 3 x I 0.40 mA PN Static converters for DC motor I Temperature variation of I - 10C .. + 85C 0.12 0.30 mA OT O drives t Reaction time 10 % of I < 500 ns ra PN Battery supplied applications 2) t Response time 90 % of I step < 1 s r PN Uninterruptible Power Supplies di/dt di/dt accurately followed > 100 A/s (UPS) BW Frequency bandwidth (- 3 dB) DC .. 100 kHz Switched Mode Power Supplies (SMPS) General data Power supplies for welding applications. T Ambient operating temperature - 10 .. + 85 C A Application domain T Ambient storage temperature - 40 .. + 90 C S R Secondary coil resistance T = 70C 35 S A Industrial. T = 85C 37 A m Mass 200 g Standards EN 50178: 1997 1) Notes: The result of the coercive force (Hc) of the magnetic circuit 2) With a di/dt of 100 A/s. Page 1/3 110203/9 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. www.lem.comCurrent Transducer LA 305-S Isolation characteristics V Rms voltage for AC isolation test, 50 Hz, 1 min 6 kV d Impulse withstand voltage 1.2/50 s 20 kV V w Min dCp Creepage distance 27 mm dCI Clearance distance 26.5 mm CTI Comparative Tracking Index (group IIIa) 225 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 2500 V 2500 V Reinforced insulation 1250 V 1250 V According VDE 0160 (1994): single insulation 3500 V Reinforced insulation 1750 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 110203/9 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. www.lem.com