AHR-B420
AHR-B420 is AC/DC Current transducer manufactured by LEM.
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.
RL VC IC ISL ÎP
Load resistance Supply voltage Current consumption Output current limitation Overload capability (Ampere Turns)
< 300 Ω + 20 .. 50 V DC 30 m A + IOUT < 25 m A 30000 At
Advantages
- High isolation between primary and secondary circuits
- Eliminates insertion loss
- Easy installation.
Performance data
ε
IOE TCIOE TCG tr BW
Accuracy @ IPN, TA = 25°C (excluding offset) Linearity error (1% of IPN .. ± IPN) Electrical offset current, TA = 25°C Temperature coefficient of IOE ( 0 .. + 60 °C) (- 40..+ 70 °C) Temperature coefficient of G (% of reading) Response time to 90% of IPN step Frequency bandwidth (±1 d B)
< ± 1 % of IPN < ± 1.0 % of IPN
4 m A <±1.0 % of IPN
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:
± 3.2 µA/K ± 6.4 µA/K ± 0.15 %/K < 150 ms DC 20 .. 6000Hz
General data
TA TS m IPxx Ambient operating temperature Ambient storage temperature Mass Protection degree
- 40 .. + 70
- 40 .. + 85 260 IP20 °C °C g
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.
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.
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior...
