Current Transducer LA 35-NP IPN = 7-8-11-17-35 A For the electronic measurement of currents : DC, AC, pulsed, mixed, with a galvanic isolation between the primary circuit (high power) and the secondary circuit (electronic circuit). 16136 Electrical data IPN IP RM Primary nominal r.m.s. current Primary current, measuring range Measuring resistance with ± 15 V ISN KN VC IC Vd Vb @ ± 35 At @ ± 70 At max max Secondary nominal r.m.s. current Conversion ratio Supply voltage (± 5 %) Current consumption R.m.s. voltage for AC isolation test, 50 Hz, 1 mn R.m.s. rated voltage 2), safe separation basic isolation 35 1) 0 .. ± 70 RM min RM max At At Features 60 60 Ω Ω range current transducer using the Hall effect • Printed circuit board mounting • Insulated plastic case recognized according to UL 94-V0. 150 85 35 mA 1-2-3-4-5 : 1000 ± 15 V 10 + IS mA 2.5 kV 600 V 1700 V Accuracy - Dynamic performance data X ε Typical accuracy @ IPN, TA = 25°C Linearity L ± 0.5 < 0.2 IO IOM IOT Typ Max Offset current 3) @ IP = 0, TA = 25°C ± 0.10 ± 0.20 Residual current 4) @ IP = 0, after an overload of 3 x IPN ± 0.05 ± 0.15 Thermal drift of IO - 25°C .. + 70°C ± 0.15 ± 0.50 tr di/dt f Response time 5) @ 90 % of IPN di/dt accurately followed Frequency bandwidth (- 1 dB) <1 > 50 DC .. 150 % % mA mA mA µs A/µs kHz General data TA TS RP RS R IS m Notes : Ambient operating temperature Ambient storage temperature Primary resistance per turn @ TA = 25°C Secondary coil resistance @ TA = 70°C Isolation resistance @ 500 V, TA = 25°C Mass Standards 1) 2) 3) 4) 5) - 25 .. + 70 °C - 40 .. + 85 °C < 1.25 mΩ 80 Ω > 1500 MΩ 22 g EN 50178 : 1997 • Closed loop (compensated) multi- 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. In order to avoid over-heating, it is necessary that the recommended primary connections be followed (see table page 2). Pollution class 2 Measurement carried out after 15 mn functioning The result of the coercive field of the magnetic circuit With a di/dt of 100 A/µs. 060719/4 LEM Components w w w .lem.com Dimensions LA 35-NP (in mm. 1 mm = 0.0394 inch) Model + SP N° Date code Right view Bottom view Top view Connection IN OUT Back view Number N o m i n a l Turns Primary Primary insertion Recommended maximum output current r a t i o resistance i n d u c t a n c e connections IP ISN KN RP LP Primary current of primary nominal t u r n s IPN [ A ] [A] [ mA ] [ mΩ ] [ µH ] 5 4 3 2 1 1 35 70 35 1 / 1000 0.3 0.023 OUT 6 7 8 9 10 5 4 3 2 1 2 17 34 34 2 / 1000 1.1 6 7 8 9 10 5 4 3 2 1 11 22 33 3 / 1000 2.5 6 7 8 9 10 5 4 3 2 1 8 16 32 4 / 1000 4.4 6 7 8 9 10 5 4 3 2 1 7 14 35 5 / 1000 6.3 • • • • General tolerance Fastening & connection of primary Fastening & connection of secondary Recommended PCB hole IN 0.58 OUT Mechanical characteristics IN 0.37 OUT 5 IN 0.21 OUT 4 IN 0.09 OUT 3 IN 6 7 8 9 10 Remarks ± 0.2 mm 10 pins 0.7 x 0.6 mm 3 pins ∅ 1 mm 1.2 mm • IS is positive when IP flows from terminals 1, 2, 3, 4, 5 to terminals 10, 9, 8, 7, 6 • This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.