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LV25-P Datasheet(PDF) 1 Page - LEM |
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LV25-P Datasheet(HTML) 1 Page - LEM |
1 / 2 page ![]() Voltage Transducer LV 25-P For the electronic measurement of voltages : DC, AC, pulsed..., with a galvanic isolation between the primary circuit (high voltage) and the secondary circuit (electronic circuit). Electrical data I PN Primary nominal r.m.s. current 10 mA I P Primary current, measuring range 0 .. ± 14 mA R M Measuring resistance R M min R M max with ± 12 V @ ± 10 mA max 30 190 Ω @ ± 14 mA max 30 100 Ω with ± 15 V @ ± 10 mA max 100 350 Ω @ ± 14 mA max 100 190 Ω I SN Secondary nominal r.m.s. current 25 mA K N Conversion ratio 2500 : 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 1), 50 Hz, 1 mn 2.5 kV Accuracy - Dynamic performance data X G Overall Accuracy @ I PN , TA = 25°C @ ± 12 .. 15 V ± 0.9 % @ ± 15 V (± 5 %) ± 0.8 % ε L Linearity < 0.2 % Typ Max I O Offset current @ I P = 0, TA = 25°C ± 0.15 mA I O T Thermal drift of I O 0°C .. + 25°C ± 0.06 ± 0.25 mA + 25°C .. + 70°C ± 0.10 ± 0.35 mA t r Response time 2) @ 90 % of V P max 40 µs General data T A Ambient operating temperature 0 .. + 70 °C T S Ambient storage temperature - 25 .. + 85 °C R P Primary coil resistance @ T A = 70°C 250 Ω R S Secondary coil resistance @ T A = 70°C 110 Ω m Mass 22 g Standards 3) EN 50178 Notes : 1) Between primary and secondary 2) R 1 = 25 kΩ (L/R constant, produced by the resistance and inductance of the primary circuit) 3) A list of corresponding tests is available Features •Closed loop (compensated) voltage transducer using the Hall effect •Insulated plastic case recognized according to UL 94-V0. Principle of use •For voltage measurements, a current proportional to the measured voltage must be passed through an external resistor R 1 which is selected by the user and installed in series with the primary circuit of the transducer. Advantages •Excellent accuracy •Very good linearity •Low thermal drift •Low response time •High bandwidth •High immunity to external interference •Low disturbance in common mode. Applications •AC variable speed drives and servo motor drives •Static converters for DC motor drives •Battery supplied applications •Uninterruptible Power Supplies (UPS) •Power supplies for welding applications. 981125/14 I PN = 10 mA V PN = 10 .. 500 V LEM Components ww w .lem.com Tope Co., Ltd. Tel: (02) 8228-0658 Fax: (02) 8228-0659 http://www.sensor.com.tw e-mail: tope@ms1.hinet.net |
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