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LA55-P Scheda tecnica(PDF) 1 Page - LEM |
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LA55-P Scheda tecnica(HTML) 1 Page - LEM |
1 / 2 page Current Transducer LA 55-P For the electronic measurement of currents : DC, AC, pulsed..., 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 50 A I P Primary current, measuring range 0 .. ± 70 A R M Measuring resistance @ T A = 70°C T A = 85°C R M min RM max R M min RM max with ± 12 V @ ± 50 A max 10 100 60 95 Ω @ ± 70 A max 10 50 601) 601) Ω with ± 15 V @ ± 50 A max 50 160 135 155 Ω @ ± 70 A max 50 90 13 52) 1352) Ω I SN Secondary nominal r.m.s. current 50 mA K N Conversion ratio 1 : 1000 V C Supply voltage (± 5 %) ± 12 .. 15 V I C Current consumption 10 (@ ±15 V) + I S mA V d R.m.s. voltage for AC isolation test, 50 Hz, 1 mn 2.5 kV Accuracy - Dynamic performance data X Accuracy @ I PN , TA = 25°C @ ± 15 V (± 5 %) ± 0.65 % @ ± 12 .. 15 V (± 5 %) ± 0.90 % ε L Linearity < 0.15 % Typ Max I O Offset current @ I P = 0, TA = 25°C ± 0.2 mA I OM Residual current 3) @ I P = 0, after an overload of 3 x I PN ± 0.3 mA I OT Thermal drift of I O 0°C .. + 70°C ± 0.1 ± 0.5 mA - 25°C .. + 85°C ± 0.1 ± 0.6 mA t ra Reaction time @ 10 % of I P max < 500 n s t r Response time @ 90 % of I P max < 1 µs di/dt di/dt accurately followed > 200 A/µs f Frequency bandwidth (- 1 dB) DC .. 200 kHz General data T A Ambient operating temperature - 25 .. + 85 °C T S Ambient storage temperature - 40 .. + 90 °C R S Secondary coil resistance @ T A = 70°C 80 Ω T A = 85°C 85 Ω m Mass 18 g Standards 4) EN 50178 Notes : 1) Measuring range limited to ± 60 A max 2) Measuring range limited to ± 55 A max 3) Result of the coercive field of the magnetic circuit 4) A list of corresponding tests is available Features •Closed loop (compensated) current transducer using the Hall effect •Printed circuit board mounting •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. I PN = 50 A 980706/8 LEM Components ww w .lem.com |
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