Current Transducer LA 25-NP/SP11 IPN = 1 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). 16095 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 @ ± 1.0 A max @ ± 1.5 A 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 1), safe separation basic isolation 1 0 .. ± 1.5 R M min R M max A A 100 100 Ω Ω 320 190 25 25 : 1000 ± 15 10 + IS 2.5 600 1700 • Closed loop (compensated) multi- mA V mA kV V V Typical accuracy @ IPN , TA = 25°C Linearity ± 0.5 < 0.2 IO IOM IOT Offset current 2) @ IP = 0, TA = 25°C Residual current 3) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO 0°C .. + 25°C + 25°C .. + 70°C Typ ± 0.05 ± 0.05 ± 0.06 ± 0.10 tr f Response time 4) @ 90 % of IP max Frequency bandwidth (- 1 dB) <1 DC .. 150 ε L turns current transducer using the Hall effect • Insulated plastic case recognized according to UL 94-V0. Special features • IPN = 1 A • IP = 0 .. ± 1.5 A • K N = 25 : 1000. Advantages Accuracy - Dynamic performance data X Features % % Max ± 0.15 ± 0.15 ± 0.25 ± 0.35 mA mA mA mA µs kHz • • • • • • • 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 General data TA TS RP RS LP R IS m Notes : • AC variable speed drives and servo Ambient operating temperature Ambient storage temperature Primary coil resistance @ TA = 25°C Secondary coil resistance @ TA = 70°C Primary insertion inductance Isolation resistance @ 500 V, TA = 25°C Mass Standards 1) 2) 3) 4) 0 .. + 70 °C - 25 .. + 85 °C < 51 mΩ 110 Ω 31 µH > 1500 MΩ 22 g EN 50178 : 1997 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. 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. 060405/2 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. LEM Page 1/2 w w w .lem.com Dimensions LA 25-NP/SP11 Bottom view (in mm. 1 mm = 0.0394 inch) Right view Top view swiss made Standard 00 or N° SP.. Year Week Secondary terminals Terminal + : supply voltage + 15 V Terminal M : measure Terminal - : supply voltage - 15 V Connection in out Back view Mechanical characteristics Remark • General tolerance • Fastening & connection of primary • IS is positive when IP flows from terminal + to terminal -. ± 0.2 mm 2 pins 0.635 x 0.635 mm • Fastening & connection of secondary 3 pins ∅ 1 mm • Recommended PCB hole 1.2 mm 060405/2 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