Current transducer. AHR-B420 Datasheet

AHR-B420 transducer. Datasheet pdf. Equivalent

AHR-B420 Datasheet
Recommendation AHR-B420 Datasheet
Part AHR-B420
Description AC/DC Current transducer
Feature AHR-B420; AC/DC Current transducer AHR-B420 The transducer for the electronic measurement of DC & distorted AC.
Manufacture LEM
Datasheet
Download AHR-B420 Datasheet





LEM AHR-B420
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
+ 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.
Page 1/3
www.lem.com



LEM AHR-B420
Current Transducer AHR-B420
Isolation characteristics
Vb Rated isolation voltage rms
600 V
with IEC 61010-1 according to the 61326 standards and following conditions:
- Double insulation
- Over voltage category CAT III
- Pollution degree PD2
- Heterogeneous field
V Rms voltage for AC isolation test, 50Hz, 1min
d
dCp Creepage distance
5.2 kV
11 m m
dCl Clearance distance
11 m m
CTI Comparative tracking index (Group I)
600
Output polarity with DC input
Output in mA
20
4
-Ipn +Ipn
Safety
This transducer must be used in electric/electronic equipment with respect to
applicable standards and safety requirements in accordance with the
manufacturer’s operating instructions.
Installation and maintenance should be done with main power supply
disconnected.
The operator must have an accreditation to install this material.
Caution! Risk of electrical shock
When operating the transducer, certain parts of the module can carry hazardous
voltage (e.g. primary conductor).
Ignoring this warning can lead to injury and/or cause serious damage.
The user must take care of all protection guarantee against electrical shock.
This transducer is a built-in device, whose conducting parts must be inaccessible
after installation. A protective housing or additional shield could be used.
061012/4
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
Page 2/3
www.lem.com



LEM AHR-B420
Dimensions AHR-B420 (in mm. 1 mm = 0.0394 inch)
17 4
10 4
22. 28
35 5.5 0
25 20
9 . 10
5 0.50
54 . 10
20 .34
15
55
1 10
15 0
Connections
Mechanical characteristics
Wires up to 2 mm
Female connector provided (screw terminals)
AHR-C420
Output Connector
1(Vcc) 2(Iout) 3(NC) 4(GND)
AHR
General tolerance
Primary aperture
Busbar fastening
Panel mounting
Distance between holes axes
± 1 mm
104 x 40 mm
1 hole 5.5 mm &
2 slots 5.5 x 30 mm
4 holes 3.2 mm
15 x 150 mm
24 VDC Power
(+)
(-)
(-) (+)
Load
(Controller, meter etc)
Remarks
The return busbar and primary conductor elbow must
be located at least at a distance of 2.5 x the window
length away from the transducer case.
The temperature of the primary busbar can not exceed
90°C.
Dynamic performances are the best with a primary
busbar completely filling the primary aperture.
This is a standard model. For different versions
(supply voltages, different outputs, bidirectional
measurements...), please contact us.
OUT
+24VDC
Is
Ip
GND
061012/4
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
Page 3/3
www.lem.com





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