LF205-S

Current Transducer LF 205-S 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 = 200 A 16135 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 @ ± 200 A max @ ± 420 A max @ ± 200 A max @ ± 420 A max 200 0 .. ± 420 TA = 70°C TA = 85°C RM min RM max RM min RM max 0 0 0 0 71 14 100 28 0 0 23 23 69 12 98 26 A A Features • Closed loop (compensated) current transducer using the Hall effect Ω Ω Ω Ω mA V mA • Insulated plastic case recognized according to UL 94-V0. 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. Secondary nominal r.m.s. current Conversion ratio Supply voltage (± 5 %) Current consumption @ ± 15 V 100 1 : 2000 ± 12 .. 15 17 + I S Accuracy - Dynamic performance data XG ε L Overall accuracy @ IPN , TA = 25°C Linearity error ± 0.5 < 0.1 % % mA mA mA ns µs A/µs kHz IO IOM IO T tra tr di/dt f Typ Max Offset current @ IP = 0, TA = 25°C ± 0.2 Residual current 1) @ IP = 0, after an overload of 3 x IPN ± 0.1 Thermal drift of IO - 40°C .. + 85°C ± 0.12 ± 0.4 Reaction time @ 10 % of IPN Response time 2) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 3 dB) < 500 100 DC .. 100 Applications • AC variable speed drives and servo motor drives • Static converters for DC motor drives • Battery supplied applications • Uninterruptible Power Supplies (UPS) General data TA TS RS m Ambient operating temperature Ambient storage temperature Secondary coil resistance @ TA = 70°C @ TA = 85°C Mass Standards - 40 .. + 85 °C - 40 .. + 90 °C 33 Ω 35 Ω 78 g EN 50178 : 1997 • Switched Mode Power Supplies (SMPS) • Power supplies for welding applications. Application domain • Industry. Notes : 1) 2) The result of the coercive field of the magnetic circuit With a di/dt of 100 A/µs. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. 0 60522/11 Page 1/3 LEM w w w .lem.com Current Transducer LF 205-S Isolation characteristics Vd Vw Ve dCp dCl CTI R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn Impulse withstand voltage 1.2/50 µs R.m.s. voltage for partial discharge extinction @ 10pC Creepage distance Clearance distance Comparative Tracking Index (Group III a) 3.5 8.8 >2 Min 11 10.2 175 kV kV kV mm mm Application examples According to EN 50178 and IEC 61010-1 standards and following conditions : • Over voltage category OV 2 • Pollution degree PD3 • Non-uniform field EN 50178 dCp, dCI, Vw Single isolation Reinforced isolation Rated isolation voltage 500 V 250 V IEC 61010-1 Nominal voltage 500 V 250 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. 060522/11 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 LF 205-S (in mm. 1 mm = 0.0394 inch) Bottom view Right view Front view Back view Connection Top view Mechanical characteristics • General tolerance • Transducer fastening Vertical position Fastening torque, max or ± 0.2 mm 2 holes ∅ 4.3 mm 2 M4 steel screws 3.2 Nm or 2.37 Lb. - Ft. 4 holes ∅ 1.9 mm depth 7 mm 4 x PT KA25 screws long 6 mm 4 holes ∅ 4.3 mm 4 M4 steel screws 3.2 Nm or 2.37 Lb. - Ft. 4 holes ∅ 1.9 mm 4 x PT KA25 screws 0.7 Nm or 0.52 Lb. - Ft. ∅ 15.5 mm Molex 5045-0.3/A Remarks • IS is positive when IP flows in the direction of the arrow. • Temperature of the primary conductor should not exceed 100°C. • Dynamic performances (di/dt and response time) are best with a single bar completely filling the primary hole. • This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. • Transducer fastening Horizontal position Fastening torque, max or Fastening torque, max • Primary through-hole • Connection of secondary LEM LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. 0 60522/11 Page 3/3 w w w .lem.com