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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 = 25 At 16054 Electrical data IPN IPM VOUT G NS RL R IM TCR IM VC IC Primary nominal current rms Primary current, measuring range Output voltage (Analog) @ IP IP = 0 Sensitivity Number of secondary turns ( 0.1 %) Load resistance Internal measuring resistance ( 0.5 %) Temperature coefficient of R IM Supply voltage ( 5 %) Current consumption @ VC = 5 V 25 At 0 .. 80 At 2.5 (0.625*IP/IPN) V 2.5 1) V 25 mV/A 2000 2 k 50 < 50 ppm/K 5 V 28 + IS2) +(V /RL)mA OUT Features * Closed loop (compensated) multi* * * * * range current transducer using the Hall effect Unipolar voltage supply Isolated plastic case recognized according to UL 94-V0 Compact design for PCB mounting Incorporated measuring resistance Extended measuring range. Typ Accuracy - Dynamic performance data X Accuracy @ IPN , TA = 25C Accuracy with R IM @ IPN , TA = 25C Linearity error 0.2 0.7 < 0.1 Typ 50 % % % Maxi 100 ppm/K 150 ppm/K 50 3) ppm/K 0.5 2.0 2.0 < 100 < 400 > 60 DC .. 100 DC .. 200 mV mV mV ns ns A/s kHz kHz Advantages * * * * * * * 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. L TCVOUT Temperature coefficient of VOUT @ IP = 0 - 10C .. + 8 5C - 40C .. - 10C TCG Temperature coefficient of G - 40C .. + 85C VOM Magnetic offset voltage @ IP = 0, after an overload of 3 x IPN 5 x IPN 10 x IPN t ra tr di/dt BW Reaction time @ 10 % of IPN Response time to 90 % of IPN step di/dt accurately followed Frequency bandwidth (0 .. - 0.5 dB) (- 0.5 .. 1 dB) Applications * 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 applications. General data TA TS m Ambient operating temperature Ambient storage temperature Insulating material group Mass Standards 4) 1) 2) 3) 4) - 40 .. + 85 C - 40 .. + 100 C III a 10 g EN 50178: 1997 IEC 60950-1: 2001 Application domain * Industrial. Copyright protected. Notes: Absolute value @ TA = 25C, 2.475 < VOUT < 2.525 IS= IP/N S Only due to TCR IM Specification according to IEC 61000-4-3 are not guaranteed between 180 and 220 MHz. Page 1/3 070129/19 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. w w w .lem.com Current Transducer LTS 25-NP Isolation characteristics Vd VW Ve dCp dCl CTI Rms voltage for AC isolation test, 50 Hz, 1 min Impulse withstand voltage 1.2/50 s Rms voltage for partial discharge extinction @ 10pC Creepage distance 5) Clearance distance 6) Comparative Tracking Index (Group III a) 3 >8 Mini > 1.5 Mini 15.5 6.35 175 kV kV kV mm mm Application examples According to EN 50178 and IEC 61010-1 standards and following conditions : * Over voltage category OV 3 * Pollution degree PD2 * Non-uniform field EN 50178 dCp, dCI, V W Single isolation Reinforced isolation Notes: 5) 6) IEC 61010-1 Nominal voltage 600 V 300 V Rated isolation voltage 600 V 300 V On housing On PCB with soldering pattern UTEC93-703. Safety This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in accordance with the manufacturer's operating instructions. Caution, risk of electrical shock When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply). Ignoring this warning can lead to injury and/or cause serious damage. This transducer is a built-in device, whose conducting parts must be inaccessible after installation. A protective housing or additional shield could be used. Main supply must be able to be disconnected. Page 2/3 070129/19 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. w w w .lem.com Dimensions LTS 25-NP (in mm. 1 mm = 0.0394 inch) Bottom view Operation principle Front view Back view Number of primary turns Primary nominal current rms IPN [ A ] 25 Nominal output voltage VOUT [ V ] 2.5 0.625 Primary resistance R P [ m ] 0.18 Right view Primary insertion inductance L P [ H ] 6 0.013 IN 1 6 1 6 1 2 5 2 5 2 3 4 3 4 3 OUT Recommended connections 5 4 OUT 1 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 0.2 mm 6 pins 0.8 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 * Fastening & connection of secondary Recommended PCB hole * Additional primary through-hole Remarks * VOUT is positive when IP flows from terminals 1, 2, 3 to terminals 6, 5, 4. * Temperature of the primary jumper should not exceed 100C. - IPmaxi - IPN 0 IPN IPmaxi IP [ At ] Page 3/3 070129/19 LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. w w w .lem.com |
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