Electrical data
Primary Nominal Current
Analogue Output Signal
Type
I
PN
(A.t.RMS)
I
OUT
(mA)
10,25,50
4-20
APR 50 B420L
50,75,100
4-20
APR 100 B420L
100,150,200
4-20
APR 200 B420L
200,300,400
4-20
APR 400 B420L
R
L
Load resistance
< 350
V
C
Supply voltage (loop powered)
+24
V DC
V
d
R.m.s. voltage for AC isolation test,
50/60Hz, 1 mn
5
kV
Limitation of output current
< 25
mA
Accuracy-Dynamic performance data
X
Accuracy @
I
PN
,
T
A
= 25C (without offset)
< 1
% of
I
PN
L
Linearity (0 ..
I
PN
)
< 0.5 % of
I
PN
I
OE
Electrical offset current,
T
A
= 25C
4
mA
I
OT
Thermal drift of
I
OE
1
A/K
TC
G
Thermal drift of the gain (% of reading)
0.1
%/K
t
r
Response time @ 90% of
I
P
< 1000
ms
f
Frequency bandwidth (-3 dB)
10 .. 6000
Hz
General data
T
A
Ambient operating temperature
-20 .. +60
C
T
S
Ambient storage temperature
-20 .. +85
C
m
Mass
90
g
Protection type
IP20
Reliable isolation according to EN50178, EN61010
300
V AC
Creepage distance
>
5.5
mm
EMC in accordance with EN50082-2
Plastic according to UL94V0, CTI 1
Notes :
Installation and maintenance should be done with power supply disconnected.
AC Current transducer APR-B420L
Split core transducer for the electronic measurement distorted AC
waveforms current, with galvanic isolation between the primary (High
power) and the secondary circuits (Electronic circuit). Switch selectable
ranges and True RMS 4-20mA current output.
I
PN
= 10 .. 400 A
030708/0
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
Advantages
Large aperture for cable up to 18mm
High isolation 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:
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.
LEM Components
www.lem.com
Preliminary
Dimensions AP(R)-B420L
(unit : mm, 1mm = 0.0394 inch)
Mechanical characteristics
General tolerance
1 mm
Primary aperture
18.5 mm
Panel mounting
2 holes
4.0 mm
Distance between holes
40.0 mm
For panel mounting, replace M4 screws by new one (not supplied) with appropriate length to panels thickness.
Connections
Wires up to 2 mm
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without previous notice.
Load Resistance vs. Supply Voltage
0
5
10
15
20
25
30
0
100
200
300
400
Load Resistance
Supply Voltage
L o a d
(+)
(+)
2 (-)
(-)
(-)
1 (+)
3 n o n e
O utp u t
R a n g e S w itc h
4 -20mA
2 4 V D C P o w e r
(C ontroller,
M e te r, e tc ,)
A P /A P R
C o n n e c to r
F ront
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