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| Current Transducer LA 25-NP 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 = 5-6-8-12-25 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 @ 25 At max @ 36 At max 25 0 .. 36 RM min RM max 100 100 320 190 At At Features *Closed loop (compensated) multirange 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 mA 1-2-3-4-5 : 1000 15 V 10 + IS mA 2.5 kV 600 V 1700 V Advantages *Excellent accuracy *Very good linearity *Low temperature drift *Optimized response time *Wide frequency bandwidth *No insertion losses *High immunity to external interference Accuracy - Dynamic performance data X L 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 di/dt accurately followed Frequency bandwidth (- 1 dB) 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 A/s kHz IO IOM IOT tr di/dt f *Current overload capability. Applications *AC variable speed drives and servo motor drives <1 > 50 DC .. 150 *Static converters for DC motor drives *Battery supplied applications *Uninterruptible Power Supplies (UPS) General data TA TS RP RS R IS m Ambient operating temperature Ambient storage temperature Primary resistance per turn @ TA = 25C Secondary coil resistance @ TA = 70C Isolation resistance @ 500 V, TA = 25C Mass Standards 5) 0 .. + 70 - 25 .. + 85 < 1.25 110 > 1500 22 EN 50178 C C m M g *Switched Mode Power Supplies (SMPS) *Power supplies for welding applications. 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/s A list of corresponding tests is available 980909/8 LEM Components w w w .lem.com Dimensions LA 25-NP Bottom view (in mm. 1 mm = 0.0394 inch) Right view Top view swiss 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 Number of primary turns Primary current nominal maximum Nominal output current Turns ratio Primary resistance Primary insertion inductance Recommended connections IPN [ A ] 25 IP [A] ISN [ mA ] KN 1/1000 RP [ m ] LP 0.023 [ H ] 54321 IN 1 36 25 0.3 OUT 6 7 8 9 10 54321 IN 2 12 18 24 2/1000 1.1 0.09 OUT 6 7 8 9 10 54321 IN 3 8 12 24 3/1000 2.5 0.21 OUT 6 7 8 9 10 54321 IN 4 6 9 24 4/1000 4.4 0.37 OUT 6 7 8 9 10 54321 IN 5 5 7 25 5/1000 6.3 0.58 OUT 6 7 8 9 10 Mechanical characteristics *General tolerance *Fastening & connection of primary *Fastening & connection of secondary *Recommended PCB hole 0.2 mm 10 pins 0.7 x 0.6 mm 3 pins 1 mm 1.2 mm Remarks *IS is positive when IP flows from terminals 1, 2, 3, 4, 5 to terminals 10, 9, 8, 7, 6 *This is a standard model. For different versions (supply voltages, turns ratios, unidirectional measurements...), please contact us. LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. |
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