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| Current Transducer LTS 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 = 8 - 12 - 25 A Preliminary Electrical data IPN IP VOUT NS RL R IM TCRIM VC IC Vd Vb Primary nominal r.m.s. current Primary current, measuring range Analog output voltage 25 At 0 .. 80 At 2.5 1) V 2.5 0.625 V 2000 2 k 50 < 50 ppm/K 5 V 20 + IS mA 2.5 kV 525 2) V Features *Closed loop (compensated) multirange current transducer using the Hall effect *Unipolar voltage supply *Insulated plastic case recognized according to UL 94-V0 *Compact design for PCB mounting *Incorporated measuring resistance *Extended measuring range. IP = 0 IPN Number of secondary turns ( 0.1 %) Load resistance Internal measuring resistance ( 0.5 %) Thermal drift of R IM Supply voltage ( 5 %) Current consumption @ VC = 5 V Typ R.m.s. voltage for AC isolation test, 50/60 Hz, 1 mn R.m.s. rated voltage Advantages Accuracy @ IPN , TA = 25C Accuracy with R IM @ IPN , TA = 25C Linearity 0.2 0.7 < 0.1 Typ 50 % % % Max 100 ppm/K 50 3) ppm/K 0.5 mV 2.0 mV 2.0 mV ns ns A/s kHz kHz Accuracy - Dynamic performance data X L TCVOUT Thermal drift of VOUT @ IP = 0 - 10C .. + 85C TC G Thermal drift of the gain - 10C .. + 85C VOM Residual voltage @ IP = 0,after an overload of 3 x IPN 5 x IPN 10 x IPN tra tr di/dt f Reaction time @ 10 % of IP max Response time @ 90 % of IP max di/dt accurately followed Frequency bandwidth (0 .. - 0.5 dB) (- 0.5 .. 1 dB) *Excellent accuracy *Very good linearity *Very low temperature drift *Optimized response time *Wide frequency bandwidth *No insertion losses *High immunity to external interference *Current overload capability. < 50 < 200 > 100 DC .. 100 DC .. 200 Applications *AC variable speed drives and servo motor drives General data TA TS m Ambient operating temperature Ambient storage temperature Mass Standards - 10 .. + 85 - 25 .. + 100 10 EN 50178 C C g *Static converters for DC motor drives *Battery supplied applications *Uninterruptible Power Supplies (UPS) *Switched Mode Power Supplies (SMPS) *Power supplies for welding applications. Notes : 1) 2) 3) Absolute value @ TA = 25C, 2.4875 < VOUT < 2.5125 Pollution class 2, category III Only due to TCR IM Copyright protected. 981222/4 LEM Components w w w .lem.com Dimensions LTS 25-NP Bottom view (in mm. 1 mm = 0.0394 inch) Operation principle Closed loop Output amplifier transducer IS = 12.5 mA @ IP = 25 At Year Week Back view Number of primary turns Primary nominal r.m.s. current IPN [ A ] 25 Nominal output voltage VOUT [ V ] 2.5 0.625 Right view Primary resistance R P [ m ] 0.18 Primary insertion inductance L P [ H ] 6 0.013 IN 1 6 1 6 1 2 5 2 5 2 Standard 00 or N SP.. Front view Recommended connections 5 4 3 4 3 4 3 OUT 1 OUT 2 12 2.5 0.600 0.81 0.05 IN OUT 3 8 2.5 0.600 1.62 0.12 IN Mechanical characteristics *General tolerance *Fastening & connection of primary Recommended PCB hole *Fastening & connection of secondary Recommended PCB hole *Additional primary through-hole 0.2 mm 6 pins 0.7 x 0.8 mm 1.3 mm 3 pins 0.5 x 0.35 mm 0.8 mm 3.2 mm Output Voltage - Primary Current VOUT [ V ] 5 4.5 3.125 2.5 1.875 0.5 Remark *VOUT is positive when IP flows from terminals 1, 2, 3 to terminals 6, 5, 4 - IPmax - IPN 0 IPN IPmax IP [ At ] LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice. |
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