IPN Current Transducer LA 25-NP/SP14 = 0.25 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). 16094 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 @ ± 0.25 A max @ ± 0.36 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 0.25 0 .. ± 0.36 R M min R M max A A Features 100 100 Ω Ω turns current transducer using the Hall effect • Printed circuit board mounting • Insulated plastic case recognized according to UL 94-V0. 320 190 25 100 : 1000 ± 15 10 + IS 2.5 600 1700 mA V mA kV V V Accuracy - Dynamic performance data X Typical accuracy @ IPN , TA = 25°C Linearity error ± 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 - 10°C .. + 70°C Typ ± 0.05 ± 0.05 ± 0.10 tr f Response time 4) @ 90 % of IPN Frequency bandwidth (- 1 dB) <1 DC .. 150 ε L % % Max ± 0.15 ± 0.15 ± 0.35 mA mA mA µs kHz • Closed loop (compensated) multi- Special features • • • • IPN IP KN TA = = = = 0.25 A 0 .. ± 0.36 A 100 : 1000 - 10°C .. + 70°C. 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. General data Applications TA TS RP RS LP R IS m 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 - 10 .. + 70 °C - 25 .. + 85 °C < 860 mΩ 110 Ω 496 µH > 1500 MΩ 22 g EN 50178 : 1997 • 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) Notes : 1) 2) 3) 4) 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. • Power supplies for welding applications. 060405/4 LEM w w w .lem.com Dimensions LA 25-NP/SP14 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 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.