Current Transducer LAH 25-NP IPN = 8-12-25 A 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). 16038 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 Vd Vb @ @ @ @ @ 25 At 0 .. 55 At TA = 70°C TA = 85°C RM min RM max RM min RM max 1) IPN [± At DC ] IPN [At RMS ] 2) IPN [± At DC ] IPN [At RMS ] 2) IP < IPN 3) 0 0 67 67 Secondary nominal r.m.s. current Conversion ratio Supply voltage (± 5 %) Current consumption R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn R.m.s. rated voltage 4) 257 155 371 236 0 0 70 70 Ω Ω Ω Ω 252 150 366 231 25 mA 1 - 2 - 3 : 1000 ± 12 .. 15 V 10 (@ ± 15V) + I S m A 5 kV 600 V Accuracy - Dynamic performance data Accuracy 5) @ IPN, TA = 25°C Linearity error X ε L ± 0.3 < 0.2 Typ IO IOM IOT tr a tr di/dt f Offset current @ TA = 25°C Residual current @ IP = 0, after an overload of 5 x IPN Thermal drift of IO 0°C .. + 70°C - 25°C .. + 85°C Max ± 0.15 ± 0.20 ± 0.25 ± 0.10 ± 0.60 ± 0.10 ± 0.70 Reaction time @ 10 % of IPN Response time 6) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 1 dB) < 200 < 500 > 200 DC .. 200 % % mA mA mA mA ns ns A/µ s kHz Features • Closed loop (compensated) multirange current transducer using the Hall effect • Printed circuit board mounting • 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. 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 General data TA TS RS Ambient operating temperature Ambient storage temperature Secondary coil resistance m Mass Standards @ TA = 70°C @ TA = 85°C - 25 .. + 85 °C - 40 .. + 90 °C 99 Ω 104 Ω 20 g EN 50178 : 1997 applications. Notes : 1)During 10 s, with R M ≤ 109 Ω (V C = ± 15 V) - 2) 50 Hz Sinusoidal 3) The measuring resistance RM min may be lower (see "LAH Technical Information" leaflet) - 4) Pollution class 2, cat. III - 5) Without IO & IOM - 6) With a di/dt of 100 A/µs - 7) LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM 060213/5 page 1/2 w w w .lem.com Dimensions LAH 25-NP (in mm. 1 mm = 0.0394 inch) Connection Bottom view Left view Front view Number Primary current N o m i n a l Turns Primary Primary insertion Recommended of primary t u r n s nominal maximum output current r a t i o resistance i n d u c t a n c e PCB c o n n e c t i o n s IPN [ A ] IP ISN KN RP LP [A] [ mA ] [ mΩ ] [ µH ] 3 2 1 IN 1 25 55 25 1 : 1000 0.18 0.012 OUT 4 5 6 3 2 1 IN 2 12 27 24 2 : 1000 0.81 0.054 OUT 4 5 6 3 2 1 IN 3 8 18 24 3 : 1000 1.62 0.110 OUT Mechanical characteristics • General tolerance • Fastening & connection of primary Recommended PCB hole • Fastening & connection of secondary Recommended PCB hole 4 5 6 Remarks ± 0.2 mm 6 pins 1 x 0.8 mm 1.5 mm 3 pins 0.7 x 0.6 mm 1.2 mm • IS is positive when IP flows from terminals 1, 2, 3 (IN) to terminals 6, 5, 4 (OUT). • The jumper temperature and PCB should not exceed 100°C. • This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. 060213/5 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM page 2/2 w w w .lem.com