Datasheet

Electrical data
Primary Nominal Current Output Current Type RoHS since
I
PN
(A.t.rms) I
OUT
(mA) date code
10,25,50 4-20 APR 50 B420L 46354
50,75,100 4-20 APR 100 B420L 47009
100,150,200 4-20 APR 200 B420L 46317
200,300,400 4-20 APR 400 B420L 46291
R
L
Load resistance, with V
C
= + 24 V DC
1)
< 350 Ω
V
C
Supply voltage (loop powered) + 12 .. 24 V DC
I
SL
Output current limitation
2)
< 25 mA
Î
P
Overload capability
3)
no limitation
Accuracy-Dynamic performance data
X Accuracy @ I
PN
, T
A
= 25°C (excluding offset) < ± 1 % of I
PN
ε
L
Linearity error (0 .. ± I
PN
) < ± 0.5 % of I
PN
I
OE
Electrical offset current @ T
A
= 25°C 4 mA
TCI
OE
Temperature coefficient of I
OE
± 1 µA/K
TCI
OUT
Temperature coefficient of I
OUT
(% of reading) ± 0.1 %/K
t
r
Response time to 90% of I
PN
step < 400 m s
BW Frequency bandwidth (± 1 %) 30 .. 6000 Hz
AC Current transducer APR-B420L
Split-core transducer for the electronic measurement of AC currents (all
waveforms), with galvanic isolation between the primary circuit (high
power) and the secondary circuit (electronics). Switch selectable
measuring ranges and True RMS 4-20mA current output (loop powered).
I
PN
= 10 .. 400 A
Features
• VFD and SCR waveform currents
measurement
• True RMS output
•Split-core type
• Loop powered 4-20mA current output
• DIN rail or Panel mounting
• Switch selectable measuring ranges
• Isolated plastic case recognized
according to UL94-V0.
Advantages
• Large aperture for cable up to
Ø18mm
• High isolation between primary and
secondary circuits
• Eliminates insertion loss
• 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
071022/6 www.lem.com
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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Load Resistance vs. Supply Voltage
0
5
10
15
20
25
30
0 50 100 150 200 250 300 350 400
Load Resistance
Supply Voltage
Notes :
1)
Max. Load Resistance vs. Supply Voltage
2)
The output current will never exceed this value for safety and protection
reasons. The output value is not valid when measuring above the primary
nominal current value.
3)
Although the transducer can withstand very high currents, the measuring
performance specified in the datasheet is valid within the 4-20 mA output
range only.