AC Current transducer AKR-B420L
A Split Core transducer for the electronic measurement AC waveforms
current, with galvanic isolation between the primary (High power) and
the secondary circuits (Electronic circuit). Jumper selectable ranges
and True RMS 4-20mA current output.
I
PN
= 2..200A
Electrical data
Primary Nominal Current
I
PN
(A.t.RMS)
2,5
10,20,50
100,150,200
Vc
R
L
V
b
V
d
f
Analogue Output Signal
1)
I
OUT
(mA)
4-20
4-20
4-20
AKR 5 B420L
Type
RoHS
Date Code
JUNE 2006
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
kV 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
t
r
Accuracy @ I
PN
, T
A
=25°C
Response time @ 90% of I
PN
±
1
< 600
%
mS
Applications
•
VFD Controlled Loads: VFD output
indicates how the motor and
General data
T
A
T
S
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 4-20mA output model, no saturation output up to 23 mA.
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
Page 1/2
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
LEM
www .lem.com
Dimensions
AKR-B420L
(unit : mm, 1mm = 0.0394 inch)
61
21.7
13
57.2
3.2
13
21.7
89.7
61
30
4.5
77.3
Mechanical characteristics
•
General tolerance
•
Primary aperture
•
Panel mounting
Distance between holes
± 1 mm
21.7 mm sq.
2 holes
∅
4.5mm
77.3 mm
Power Supply diagram
Connections
•
2 x UNC8 Cylindric Head
Remark
•
Temperature of the primary conductor should not
exceed 60°C.
060816/5
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
Page 2/2
LEM
www .lem.com
PCB Design
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