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| Current Transducer LA 25-NP/SP14 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). IPN = 0.25 A 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 0.25 0 .. 0.36 R M min R M max 100 100 320 190 A A mA V mA kV V V Features * Closed loop (compensated) multiturns current transducer using the Hall effect * Printed circuit board mounting * Insulated plastic case recognized according to UL 94-V0. 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 25 100 : 1000 15 10 + IS 2.5 600 1700 Special features * * * * IPN IP KN TA = = = = 0.25 A 0 .. 0.36 A 100 : 1000 - 10C .. + 70C. Accuracy - Dynamic performance data X L Typical accuracy @ IPN , TA = 25C Linearity error Offset current 2) @ IP = 0, TA = 25C Residual current 3) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO - 10C .. + 70C Response time 4) @ 90 % of IPN Frequency bandwidth (- 1 dB) 0.5 < 0.2 Typ 0.05 0.05 0.10 Max 0.15 0.15 0.35 % % mA mA mA s kHz 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. IO IOM IOT tr f <1 DC .. 150 General data Applications TA TS RP RS LP R IS m Ambient operating temperature Ambient storage temperature Primary coil resistance @ TA = 25C Secondary coil resistance @ TA = 70C Primary insertion inductance Isolation resistance @ 500 V, TA = 25C Mass Standards - 10 .. + 70 C - 25 .. + 85 C < 860 m 110 496 H > 1500 M 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/s. * 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 * General tolerance * Fastening & connection of primary 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 Remark * IS is positive when IP flows from terminal + to terminal -. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. |
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