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LA35-NP Datasheet(PDF) 1 Page - LEM |
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LA35-NP Datasheet(HTML) 1 Page - LEM |
1 / 2 page Current Transducer LA 35-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). Electrical data I PN Primary nominal r.m.s. current 35 1) At I P Primary current, measuring range 0 .. ± 70 At R M Measuring resistance R M min R M max with ± 15 V @ ± 35 At max 60 320 Ω @ ± 70 At max 60 85 Ω I SN Secondary nominal r.m.s. current 35 mA K N Conversion ratio 1-2-3-4-5 : 1000 V C Supply voltage (± 5 %) ± 15 V I C Current consumption 10 + I S mA V d R.m.s. voltage for AC isolation test, 50 Hz, 1 mn 2.5 kV V b R.m.s. rated voltage 2), safe separation 600 V basic isolation 1700 V Accuracy - Dynamic performance data X Accuracy @ I PN , TA = 25°C ± 0.5 % ε L Linearity < 0.2 % Typ Max I O Offset current 3) @ I P = 0, TA = 25°C ± 0.10 ± 0.20 mA I OM Residual current 4) @ I P = 0, after an overload of 3 x IPN ± 0.05 ± 0.15 mA I OT Thermal drift of I O - 25°C .. + 70°C ± 0.15 ± 0.50 mA t r Response time 5) @ 90 % of I P max < 1 µs di/dt di/dt accurately followed > 50 A/µs f Frequency bandwidth (- 1 dB) DC .. 150 kHz General data T A Ambient operating temperature - 25 .. + 70 °C T S Ambient storage temperature - 40 .. + 85 °C R P Primary resistance per turn @ T A = 25°C < 1.25 m Ω R S Secondary coil resistance @ T A = 70°C 80 Ω R IS Isolation resistance @ 500 V, T A = 25°C > 1500 M Ω m Mass 22 g Standards 6) EN 50178 Notes : 1) In order to avoid over-heating, it is necessary that the recommended primary connections be followed (see table page 2) 2) Pollution class 2 3) Measurement carried out after 15 mn functioning 4) The result of the coercive field of the magnetic circuit 5) With a di/dt of 100 A/µs 6) A list of corresponding tests is available Features •Closed loop (compensated) multi- range current transducer using the Hall effect •Insulated plastic case recognized according to UL 94-V0. 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. 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. 980909/1 I PN = 7-8-11-17-35 A LEM Components ww w .lem.com |
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