AKR-B420L
AKR-B420L is AC Current transducer manufactured by LEM.
Features
- VFD and SCR waveforms current measurement
- True RMS responding
- Split core box
- Current output
- Loop powered transducers
- Panel mounting
- Jumper selectable ranges AKR 50 B420L planned AKR 200 B420L planned 24 V DC V AC k V AC Hz
Supply voltage (Loop powered)
Load resistance see power supply diagram Rated voltage (CAT III, PD2) 150 RMS Isolation voltage test, 50 Hz, 1mn 3 Frequency bandwith 10-400
Advantages
- Large aperture
- High isolation between primary and secondary circuits
- Easy to mount
Accuracy
- Dynamic performance data
X tr Accuracy @ IPN, TA=25°C Response time @ 90% of IPN ±1 < 600 % m S
Applications
- VFD Controlled Loads: VFD output indicates how the motor and
General data
TA TS m Ambient operating temperature (0-95% RH) Ambient storage temperature Mass Safety EMC
- 20 ..+ 50
- 20 ..+ 85 120 IEC 61010-1 EN 61326 °C °C g attached load are operating.
- SCR Controlled Loads: Acurate measurement of phase angle fired or burst fired (time proportioned) SCRs.
- Switching Power Supplies and Electronic Ballasts: True RMS sensing
Note:
1)
For 4-20m A output model, no saturation output up to 23 m A. is the most accurate way to measure power supply or ballast input power.
Selecting the transducer
VFD (Variable Frequency Drive) and SCR (Semi Conductor Rectifier) output waveforms are rough approximations of a sine wave. There are numerous spikes and dips in each cycle. AKR transducers use a mathematical algorithm called “True RMS,” which integrates the actual waveform over time. True RMS is the only way to accurately measure distorted AC waveforms. Select AKR transducers for nonlinear loads or in “noisy” power environments.
Options on request
- DIN mounting 060816/5
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
.lem.
Dimensions
(unit : mm, 1mm = 0.0394...
