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DHR-C420 Datasheet(PDF) 1 Page - LEM |
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DHR-C420 Datasheet(HTML) 1 Page - LEM |
1 / 3 page Electrical data Primary Nominal Primary AC Current Output current Type DC & AC Current Max. Peak Value (*) I PN (A.t.RMS) I P (A) I OUT (mADC) 100 600 4-20 DHR 100 C420 200 600 4-20 DHR 200 C420 300 1000 4-20 DHR 300 C420 400 1000 4-20 DHR 400 C420 500 1800 4-20 DHR 500 C420 600 1800 4-20 DHR 600 C420 1000 1800 4-20 DHR 1000 C420 R L Load resistance < 300 Ω V C Supply voltage + 20 .. 50 V DC I C Current consumption 30 mA + I OUT I SL Output current limitation < 25 mA Î P Overload capability (Ampere Turns) 30000 A.t Performance data X Accuracy @ I PN, TA = 25°C (excluding offset) < ± 1 % of I PN ε L Linearity error (1% of I PN .. ± IPN) < ± 1.0 % of I PN I OE Electrical offset current, T A = 25°C 4 mA TCI OE Temperature coefficient of I OE ( 0..+60 °C) ± 3.2 µA/K (-40..+70 °C) ± 6.4 µA/K TCI OUT Temperature coefficient of I OUT (% of reading) ± 0.1 %/K t r Response time to 90% of I PN step < 150 m s BW Frequency bandwidth (±1dB) DC 20..6000Hz General data T A Ambient operating temperature - 40 .. + 70 °C T S Ambient storage temperature - 40 .. + 85 °C m Mass 260 g IPxx Protection degree IP20 Note : (*) The Max. Peak AC Current is the highest peak level of the primary signal that is taken into account for accurate True RMS calculation. Yet the device is designed for maximum continuous True RMS value equal to I PN, whereas the output is limited by the above specified output limitation. AC/DC Current transducer DHR-C420 The transducer for the electronic measurement of DC & distorted AC waveform currents, with galvanic isolation between the primary circuit (power) and the secondary circuit (measurement). True RMS 4-20mA current output. I PN = 100..1000 A Features • VFD and SCR waveforms current measurement • True RMS output • 4-20mA current output • Panel mounting • Eliminates insertion loss • Insulated plastic case recognized according to UL94-V0 Advantages • Large aperture for cable up to Ø32mm • High isolation between primary and secondary circuits • Easy installation Applications • VFD Controlled Loads VFD output indicates how the motor and attached load are operating. • SCR Controlled Loads Acurate measurement of phase angle fired or burst fired (time proportioned) SCRs. Current measurement gives faster response than temperature measurement. • Switching Power Supplies and Electronic Ballasts True RMS sensing is the most accurate way to measure power supply or ballast input power. Application domain • Energy and Automation 061128/14 www.lem.com LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice. Page 1/3 |
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