LT108-S7/SP1

Current Transducer LT 108-S7/SP1 For the electronic measurement of currents: DC, AC, pulsed..., with galvanic isolation between the primary circuit and the secondary circuit. Electrical data Features IPN Primary nominal current rms IPM Primary current, measuring range R M Measuring resistance with ± 12 V @ ± 100 A max @ ± 150 A max with ± 15 V @ ± 100 A max @ ± 150 A max ISN Secondary nominal current rms KN Conversion ratio V C Supply voltage (± 5 %) IC Current consumption 100 A 0 .. ± 150 A RM min RM max 0 136 Ω 0 74 Ω 0 175 Ω 0 106 Ω 50 mA 1 : 2000 ± 12 .. 15 V 20 (@ ± 15 V) + IS mA Accuracy - Dynamic performance data XG εL IOE IOM IOT tra tr di/dt BW Overall accuracy @ IPN , TA = 25°C ± 0.6 % Linearity error < 0.1 % Typ Max Electrical offset current @ IP = 0, TA = 25°C ± 0.15 mA Magnetic offset current 1) @ IP = 0, and specified RM, after an overload of 3 x IPN ± 0.10 mA Temperature variation of IO - 10°C .. + 70°C ± 0.20 ± 0.64 mA Reaction time to 10 % of IPN step < 500 ns Response time 2) to 90 % of IPN step < 1 µs di/dt accurately followed > 100 A/µs Frequency bandwidth (- 3 dB) DC .. 100 kHz General data TA TS RS m Notes: Ambient operating temperature Ambient storage temperature Secondary coil resistance @ TA = 70°C Mass Standard 1) 2) IPN = 100 A Result of the coercive field of the magnetic circuit With a di/dt of 100 A/µs. - 10 .. + 70 °C - 25 .. + 80 °C 32 Ω 76 g EN 50178: 1997 ●● Closed loop (compensated) current transducer using the Hall effect ●● Isolated plastic case recognized according to UL 94-V0. Special feature ●● Secondary connection on JTB450-00. 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. Applications ●● AC variable speed drives and servo motor drives ●● Static converters for DC motor drives ●● Battery supplied applications ●● Uninterruptible Power Supplies (UPS) ●● Switched Mode Power Supplies (SMPS) ●● Power supplies for welding applications. Application Domain ●● Industrial. Page 1/3 24September2012/version 4 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com Current Transducer LT 108-S7/SP1 Isolation characteristics Vd Vw dCp dCI CTI Rms voltage for AC insulation test 1), 50 Hz, 1 min Impulse withstand voltage 1.2/50 µs Creepage distance 2) Clearance 2) Comparative Tracking Index (group IIIa) Notes: 1) 2) 3.52 6.5 Min 10 6 275 kV kV mm mm Between primary and secondary On housing. 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 Rated insulation voltage Nominal voltage Basic insulation 600 V 600 V Reinforced insulation 300 V 300 V dCp, dCI, Vw 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 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 24September2012/version 4 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com Dimensions LT 108-S7/SP1 (in mm) Connection Mechanical characteristics ●● General tolerance ●● Transducer fastening Recommended fastening torque Or Recommended fastening torque ●● Primary through-hole ●● Connection of secondary Remarks ± 0.5 mm 2 holes Ø 5.4 mm 2 M5 steel screws 1.5 Nm (± 10 %) 2 notches 4.2 mm 2 M4 steel screws 0.75 Nm (± 10 %) Ø 20 mm Socket JTB450-00 (JITE, Shenzhen) ●● 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. Page 3/3 24September2012/version 4 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice www.lem.com