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| Current Transducer LA 25-NP/SP7 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 = 2.5 A 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 @ 2.5 A max @ 3.6 A max 2.5 0 .. 3.6 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 *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 10 : 1000 15 10 + IS 2.5 600 1700 Special features *IPN = 2.5 A *IP = 0 .. 3.6 A *K N = 10 : 1000. Accuracy - Dynamic performance data X Advantages 0.5 < 0.2 Typ 0.05 0.05 0.06 0.10 Max 0.15 0.15 0.25 0.35 % % mA mA mA mA s kHz L Typical accuracy @ IPN , TA = 25C Linearity Offset current 2) @ IP = 0, TA = 25C Residual current 3) @ IP = 0, after an overload of 3 x IPN Thermal drift of IO 0C .. + 25C + 25C .. + 70C Response time 4) @ 90 % of IP max Frequency bandwidth (- 1 dB) IO IOM IOT tr f *Excellent accuracy *Very good linearity *Low temperature drift *Optimized response time *Wide frequency bandwidth *No insertion losses *High immunity to external interference <1 DC .. 150 *Current overload capability. Applications General data TA TS RP RS LP R IS m Notes : 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 5) 1) 2) 3) 4) 5) *AC variable speed drives and servo 0 .. + 70 - 25 .. + 85 < 8.5 110 5.5 > 1500 22 EN 50178 C C m H M g 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. 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/s A list of corresponding tests is available 990125/2 LEM Components w w w .lem.com Dimensions LA 25-NP/SP7 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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