Current Transducer LF 306-S I = 300 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). 16130 Electrical data Features I Primary nominal r.m.s. current 300 A PN I Primary current, measuring range 0 .. 500 A Closed loop (compensated) current P R Measuring resistance R R transducer using the Hall effect M M min M max Insulated plastic case recognized with 12 V 300 A 0 37 max according to UL 94-V0. 500 A 0 8 max with 15 V 300 A 10 56 max Advantages 500 A 10 20 max I Secondary nominal r.m.s. current 150 mA SN Excellent accuracy K Conversion ratio 1 : 2000 N Very good linearity V Supply voltage ( 5 %) 12 .. 15 V C Low temperature drift I Current consumption 20 ( 15 V) + I mA C S Optimized response time Wide frequency bandwidth Accuracy - Dynamic performance data No insertion losses High immunity to external X Overall accuracy I , T = 25C 0.4 % interference G PN A e Linearity error < 0.1 % Current overload capability. L Typ Max Applications I Offset current I = 0, T = 25C 0.20 mA O P A 1) I Residual current I = 0, after an overload of 3 x I 0.08 mA OM P PN AC variable speed drives and servo I Thermal drift of I - 25C .. + 70C 0.20 0.64 mA OT O motor drives t Reaction time 10 % of I < 500 ns ra P max Static converters for DC motor drives 2) t Response time 90 % of I < 1 s r PN Battery supplied applications di/dt di/dt accurately followed > 100 A/s Uninterruptible Power Supplies f Frequency bandwidth (- 1 dB) DC .. 100 kHz (UPS) Switched Mode Power Supplies General data (SMPS) Power supplies for welding T Ambient operating temperature - 25 .. + 70 C applications. A T Ambient storage temperature - 40 .. + 90 C S R Secondary coil resistance T = 70C 34 Application Domain S A m Mass 60 g Standards EN 50178 : 1997 Industrial. 1) Notes : The result of the coercive field of the magnetic circuit 2) With a di/dt of 100 A/s. 070424/9 Page 1/3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM www.lem.comCurrent Transducer LF 306-S Isolation characteristics V R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn 6 kV d V Impulse withstand voltage 1.2/50 s >7.3 kV w Min dCp Creepage distance 8 mm dCl Clearance distance 7.15 mm CTI Comparative Tracking Index (Group III a) 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, V Rated isolation voltage Nominal voltage 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. 070424/9 Page 2/3 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM www.lem.com