AHR-B420 Datasheet, PDF (1/3 Pages) LEM – AC/DC Current transducer

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
Electrical data
Primary nominal
DC & AC current
I_PN (At rms)
500
800
1000
1500
2000
Primary AC current
max. peak value ¹⁾
I_P (A)
2000
2500
2000
2500
3000
Output currentt
I_OUT (mA DC)
4-20
4-20
4-20
4-20
4-20
R_L
Load resistance
V_C
Supply voltage
I_C
Current consumption
I_SL
Output current limitation
Î_P
Overload capability (Ampere Turns)
Performance data
X
ε_L
I_OE
TCI_OE
TCG
t_r
BW
Accuracy @ I_PN, T_A = 25°C (excluding offset)
Linearity error (1% of I_PN .. ± I_PN)
Electrical offset current, T_A = 25°C
Temperature coefficient of I_OE ( 0 .. + 60 °C)
(- 40..+ 70 °C)
Temperature coefficient of G (% of reading)
Response time to 90% of I_PN step
Frequency bandwidth (±1 dB)
General data
T_A
Ambient operating temperature
T_S
Ambient storage temperature
m
Mass
IPxx
Protection degree
Type
AHR 500 B420
AHR 800 B420
AHR 1000 B420
AHR 1500 B420
AHR 2000 B420
< 300
Ω
+ 20 .. 50 V DC
30 mA + I_OUT
< 25
mA
30000
At
< ± 1 % of I_PN
< ± 1.0 % of I_PN
4 mA <±1.0 % of I_PN
± 3.2
µA/K
± 6.4
µA/K
± 0.15 %/K
< 150
ms
DC 20 .. 6000Hz
- 40 .. + 70 °C
- 40 .. + 85 °C
260
g
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.
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
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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