Current Transducer LA 25-NP/SP14 IPN = 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). 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 •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 ε Typical accuracy @ IPN , TA = 25°C Linearity L ± 0.5 < 0.2 % % Typ Max Offset current 2) @ IP = 0, TA = 25°C ± 0.05 ± 0.15 Residual current 3) @ IP = 0, after an overload of 3 x IPN ± 0.05 ± 0.15 Thermal drift of IO - 10°C .. + 70°C ± 0.10 ± 0.35 mA mA mA tr f Response time 4) @ 90 % of IP max Frequency bandwidth (- 1 dB) µs kHz <1 DC .. 150 General data 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 5) Special features •IPN •IP •K N •TA = = = = 0.25 A 0 .. ± 0.36 A 100 : 1000 - 10°C .. + 70°C. Advantages IO IOM IOT TA TS RP RS LP R IS m •Closed loop (compensated) multi- •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 - 10 .. + 70 - 25 .. + 85 < 745 110 496 > 1500 22 EN 50178 °C °C mΩ Ω µH MΩ g •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 Notes : 1) 2) 3) 4) 5) Pollution class 2 Measurement carried out after 15 mn functionning The result of the coercive field of the magnetic circuit With a di/dt of 100 A/µs A list of corresponding tests is available LEM Components applications. 990126/2 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.