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AHR-B420 Datasheet(PDF) 1 Page - LEM |
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AHR-B420 Datasheet(HTML) 1 Page - LEM |
1 / 3 page Electrical data Primary nominal Primary AC current Output currentt Type DC & AC current max. peak value 1) I PN (At rms) I P (A) I OUT (mA DC) 500 2000 4-20 AHR 500 B420 800 2500 4-20 AHR 800 B420 1000 2000 4-20 AHR 1000 B420 1500 2500 4-20 AHR 1500 B420 2000 3000 4-20 AHR 2000 B420 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 At 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 <±1.0 % of I PN TCI OE Temperature coefficient of I OE ( 0 .. + 60 °C) ± 3.2 µA/K (- 40..+ 70 °C) ± 6.4 µA/K TCG Temperature coefficient of G (% of reading) ± 0.15 %/K t r Response time to 90% of I PN step < 150 m s BW Frequency bandwidth (±1 dB) 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 : 1) The max. peak AC current is the highest peak level of the primary signal that is taken into account for accurate true r.m.s. calculation. Yet the device is designed for maximum continuous true r.m.s. value equal to I PN, whereas the output is limited by the above specified output limitation. AC/DC Current transducer AHR-B420 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 r.m.s. 4-20 mA current output. I PN = 500 .. 2000 A Features • DC + distorted AC waveform currents measurement • True r.m.s. output • Busbar or panel mounting • Split core type • Insulated plastic case recognized according to UL94-V0. Advantages • High isolation between primary and secondary circuits • Eliminates insertion loss • Easy installation. Applications • AC power supplies or Motors: True r.m.s. current sensing - the most accurate way to monitor power supply or motor input power • VFD Controlled Loads: VFD output current monitoring to indicate how the motor and the attached load are operating • SCRs or Switch-mode Rectifiers: Accurate measurement of output current • Renewable Energy Installations or Backup Batteries: Continuous condition minitoring allowing automatic failure detection/ anticipation. 061012/4 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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