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LA305-S Datasheet(PDF) 1 Page - LEM |
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LA305-S Datasheet(HTML) 1 Page - LEM |
1 / 2 page Current Transducer LA 305-S 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 300 A I P Primary current, measuring range 0 .. ± 500 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 @ ± 300 A max 0 52 0 50 Ω @ ± 500 A max 0 17 0 15 Ω with ± 15 V @ ± 300 A max 0 75 5 73 Ω @ ± 500 A max 0 31 5 29 Ω I SN Secondary nominal r.m.s. current 120 mA K N Conversion ratio 1 : 2500 V C Supply voltage (± 5 %) ± 12 .. 15 V I C Current consumption 20 (@ ±15 V) + I S mA V b R.m.s. rated voltage 1), safe separation 1750 V basic isolation 3500 V Accuracy - Dynamic performance data X G Overall accuracy @ I PN , TA = 25°C ± 0.8 % ε L Linearity < 0.1 % Typ Max I O Offset current @ I P = 0, TA = 25°C ± 0.20 mA I OM Residual current 2) @ I P = 0, after an overload of 3 x IPN ± 0.40 mA I OT Thermal drift of I O - 10°C .. + 85°C ± 0.12 ± 0.30 mA t ra Reaction time @ 10 % of I P max < 500 n s t r Response time 3) @ 90 % of I P max < 1 µs di/dt di/dt accurately followed > 100 A/µs f Frequency bandwidth (- 3 dB) DC .. 100 kHz General data T A Ambient operating temperature - 10 .. + 85 °C T S Ambient storage temperature - 40 .. + 90 °C R S Secondary coil resistance @ T A = 70°C 35 Ω T A = 85°C 37 Ω m Mass 200 g Standards 4) EN 50178 Notes : 1) Pollution class 2. With a non insulated primary bar which fills the through-hole 2) The result of the coercive field of the magnetic circuit 3) With a di/dt of 100 A/µs 4) A list of corresponding tests is available Features •Closed loop (compensated) current transducer using the Hall effect •Insulated plastic case recognized according to UL 94-V0 •Copyright protected. 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 = 300 A 980707/6 LEM Components ww w .lem.com |
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