AC/DC Current transducer AHR-B420 IPN = 500 .. 2000 A
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.
Electrical data
Features
Primarynominal
DC & AC current
IPN (At rms)
Primary AC current
max. peak value 1)
IP (A)
Output currentt
IOUT (mA DC)
Type
· DC + distorted AC waveform currents
measurement
500
800
1000
1500
2000
2000
2500
2000
2500
3000
4-20
4-20
4-20
4-20
4-20
AHR 500 B420
AHR 800 B420
AHR 1000 B420
AHR 1500 B420
AHR 2000 B420
· True r.m.s. output
· Busbar or panel mounting
· Split core type
· Insulated plastic case recognized
according to UL94-V0.
RL
VC
IC
Load resistance
Supply voltage
Current consumption
< 300
W
+ 20 .. 50 V DC
30 mA + IOUT
Advantages
ISL
ÎP
Output current limitation
Overload capability (Ampere Turns)
< 25
30000
mA
At
· High isolation between primary and
secondary circuits
· Eliminates insertion loss
· Easy installation.
Performance data
X
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)
< ± 1 % of IPN
< ± 1.0 % of IPN
4 mA <±1.0 % of IPN
e
L
Applications
IOE
TCIOE
± 3.2
± 6.4
± 0.15
< 150
mA/K
mA/K
%/K
m s
· AC power supplies or Motors:
True r.m.s. current sensing - the most
accurate way to monitor power supply
or motor input power
TCG
tr
BW
Temperature coefficient of G (% of reading)
Response time to 90% of IPN step
Frequency bandwidth (±1 dB)
DC 20 .. 6000Hz
· VFD Controlled Loads:
General data
VFD output current monitoring to
indicate how the motor and the
attached load are operating
TA
TS
m
Ambient operating temperature
Ambient storage temperature
Mass
- 40 .. + 70 °C
- 40 .. + 85 °C
260
g
· SCRs or Switch-mode Rectifiers:
Accurate measurement of output
current
IPxx
Protection degree
IP20
· Renewable Energy Installations or
Backup Batteries:
Continuous condition minitoring
allowing automatic failure detection/
anticipation.
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.
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LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
061012/4
www.lem.com