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PDF AHR-B420 Data sheet ( Hoja de datos )
| Número de pieza | AHR-B420 | |
| Descripción | AC/DC Current transducer | |
| Fabricantes | LEM | |
| Logotipo |  |
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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.
IPN = 500 .. 2000 A
Electrical data
Primary nominal
DC & AC current
IPN (At rms)
500
800
1000
1500
2000
Primary AC current
max. peak value 1)
IP (A)
2000
2500
2000
2500
3000
Output currentt
IOUT (mA DC)
4-20
4-20
4-20
4-20
4-20
R L Load resistance
VC Supply voltage
IC Current consumption
ISL Output current limitation
ÎP Overload capability (Ampere Turns)
Performance data
X
εL
IOE
TCIOE
TCG
tr
BW
Accuracy @ IPN, TA = 25°C (excluding offset)
Linearity error (1% of IPN .. ± IPN)
Electrical offset current, TA = 25°C
Temperature coefficient of IOE ( 0 .. + 60 °C)
(- 40..+ 70 °C)
Temperature coefficient of G (% of reading)
Response time to 90% of IPN step
Frequency bandwidth (±1 dB)
General data
TA Ambient operating temperature
TS 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 + IOUT
< 25
mA
30000
At
< ± 1 % of IPN
< ± 1.0 % of IPN
4 mA <±1.0 % of IPN
± 3.2
µA/K
± 6.4
µA/K
± 0.15 %/K
< 150
ms
DC 20 .. 6000Hz
- 40 .. + 70
- 40 .. + 85
260
IP20
°C
°C
g
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 IPN, 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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