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AHR-B420 Datasheet(PDF) 1 Page - LEM

Part # AHR-B420
Description  AC/DC Current transducer
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Manufacturer  LEM [LEM]
Direct Link  http://www.lem.co.jp/HQ/en
Logo LEM - LEM

AHR-B420 Datasheet(HTML) 1 Page - LEM

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Electrical data
Primary nominal
Primary AC current
Output currentt
Type
DC & AC current
max. peak value 1)
I
PN (At rms)
I
P (A)
I
OUT (mA DC)
500
2000
4-20
AHR 500 B420
800
2500
4-20
AHR 800 B420
1000
2000
4-20
AHR 1000 B420
1500
2500
4-20
AHR 1500 B420
2000
3000
4-20
AHR 2000 B420
R
L
Load resistance
< 300
V
C
Supply voltage
+ 20 .. 50 V DC
I
C
Current consumption
30 mA + I
OUT
I
SL
Output current limitation
< 25
mA
Î
P
Overload capability (Ampere Turns)
30000
At
Performance data
X
Accuracy @ I
PN, TA = 25°C (excluding offset)
< ± 1
% of I
PN
ε
L
Linearity error (1% of I
PN .. ± IPN)
< ± 1.0 % of I
PN
I
OE
Electrical offset current, T
A = 25°C
4 mA <±1.0 % of I
PN
TCI
OE
Temperature coefficient of I
OE
( 0 .. + 60 °C)
± 3.2
µA/K
(- 40..+ 70 °C)
± 6.4
µA/K
TCG
Temperature coefficient of G (% of reading)
± 0.15
%/K
t
r
Response time to 90% of I
PN step
< 150
m s
BW
Frequency bandwidth (±1 dB)
DC 20 .. 6000Hz
General data
T
A
Ambient operating temperature
- 40 .. + 70
°C
T
S
Ambient storage temperature
- 40 .. + 85
°C
m
Mass
260
g
IPxx
Protection degree
IP20
Note :
1) The max. peak AC current is the highest peak level of the primary signal that is
taken into account for accurate true r.m.s. calculation. Yet the device is designed
for maximum continuous true r.m.s. value equal to I
PN, whereas the output is limited
by the above specified output limitation.
AC/DC Current transducer AHR-B420
The transducer for the electronic measurement of DC & distorted AC
waveform currents, with galvanic isolation between the primary circuit
(power) and the secondary circuit (measurement).
True r.m.s. 4-20 mA current output.
I
PN = 500 .. 2000 A
Features
• DC + distorted AC waveform currents
measurement
• True r.m.s. output
• Busbar or panel mounting
• Split core type
• Insulated plastic case recognized
according to UL94-V0.
Advantages
• High isolation between primary and
secondary circuits
• Eliminates insertion loss
• Easy installation.
Applications
• AC power supplies or Motors:
True r.m.s. current sensing - the most
accurate way to monitor power supply
or motor input power
• VFD Controlled Loads:
VFD output current monitoring to
indicate how the motor and the
attached load are operating
• SCRs or Switch-mode Rectifiers:
Accurate measurement of output
current
• Renewable Energy Installations or
Backup Batteries:
Continuous condition minitoring
allowing automatic failure detection/
anticipation.
061012/4
www.lem.com
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
Page 1/3


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