AKR-C420L_16 Datasheet, PDF (1/3 Pages) LEM – AC Current Transducer

AC Current Transducer AKR-C420L
Transducer for the electronic measurement AC waweforms current,
with galvanic separation between the primary circuit and the
secondary circuit. Jumper selectable ranges and True RMS 4-20 mA
current output.
I_PN = 2 … 200 A
Electrical data
Primary nominal current
I_PN (At rms)
Analogue output voltage ¹⁾
I_out (mA)
Types
2, 5
10, 20, 50
100, 150, 200
4-20
4-20
4-20
AKR 5 C420L
AKR 50 C420L
AKR 200 C420L
U_C Supply voltage (Loop powered)
R_L Load resistance
Accuracy - Dynamic performance data
X Accuracy @ I_PN, T_A = 25 °C
t_r
Step response time to 90 % of I_PN
BW Frequency bandwidth
General data
T_A Ambient operating temperature (0-95 % RH)
T_S Ambient storage temperature
m Mass
Sandards

24
V DC
see power supply diagram
±1
%
< 600
ms
10-400
Hz
−20 … +50
°C
−20 … +85
°C
90
g
Safety IEC 61010-1: 2001
EMC EN 61326-1: 2005
Note: ¹⁾ For 4-20 mA output model, no saturation output up to 23 mA.
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.
Features
●● VFD and SCR waveforms current
measurement
●● True RMS responding
●● 4-20 mA current output
●● Loop powered transducers
●● Panel mounting
●● Accurate
●● Jumper selectable ranges.
Advantages
●● Large aperture
●● High insulation between primary
and secondary circuits
●● Easy to mount.
Applications
●● VFD Controlled Loads
VFD output indicates how the
motor and attached load are
operating.
●● SCR Controlled Loads
Accurate measurement of phase
angle fired or burst fired (time
proportioned) SCRs.
●● Switching Power Supplies and
Electronic Ballasts
True RMS sensing is the most
accurate way to measure power
supply or ballast input power.
Options on request
●● DIN mounting.
Application domain
●● Renewable Energies and
Power Supplies.
F2.11.08.000.0; F2.11.25.000.0; F2.11.44.000.0
14March2016/version 8
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
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