APR-B420L_07 Datasheet, PDF (1/3 Pages) LEM – AC Current transducer

AC Current transducer APR-B420L
Split core transducer for the electronic measurement distorted AC
waveforms current, with galvanic isolation between the primary circuit
(power) and the secondary circuit (measurement). Switch selectable
ranges and True RMS 4-20mA current output.
I = 10 .. 400 A
PN
Electrical data
Primary Nominal Current
I_PN (A.t.rms)
10,25,50
50,75,100
100,150,200
200,300,400
Output Current
I_OUT (mA)
4-20
4-20
4-20
4-20
Type
APR 50 B420L
APR 100 B420L
APR 200 B420L
APR 400 B420L
RoHS since
date code
planned
planned
46317
46291
R_L
Load resistance
(See the graph "Load Resistance vs. Supply Voltage") < 350
Ω
V_C
Supply voltage (loop powered)
I_SL
Output current limitation
Î_P
Overload capability
+ 12 .. 24 V DC
< 25
mA
no limitation
Accuracy-Dynamic performance data
X
ε
L
I_OE
TCI_OE
TCI
OUT
t_r
BW
Accuracy @ I_PN, T_A = 25°C (excluding offset)
Linearity error (0 .. ± I )
PN
Electrical offset current @ T_A = 25°C
Temperature coefficient of I_OE
Temperature coefficient of I (% of reading)
OUT
Response time to 90% of I_PN step
Frequency bandwidth (± 1 %)
< ± 1 % of I_PN
< ± 0.5 % of I
PN
4
mA
±1
µA/K
± 0.1
%/K
< 400
ms
30 .. 6000 Hz
General data
T
A
T_S
m
IPxx
Ambient operating temperature
Ambient storage temperature
Mass
Protection degree
- 20 .. + 60 °C
- 20 .. + 85 °C
90
g
IP20
Features
• VFD and SCR waveforms current
measurement
• True RMS output
• Split core type
• Loop powered 4-20mA current output
• DIN mounting & Panel mounting
• Eliminates insertion loss
• Switch selectable ranges
• Isolated plastic case recognized
according to UL94-V0.
Advantages
• Large aperture for cable up to
Ø18mm
• 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
070125/4
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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