FHS 40-P KIT 8-1P LEM USA Inc, FHS 40-P KIT 8-1P Datasheet - Page 9

• Manufacturer Part Number: FHS 40-P KIT 8-1P
• Description: FHS 40 PCB KIT 5/16A
• Manufacturer: LEM USA Inc

Specifications of FHS 40-P KIT 8-1P

• Sensor Type: Current Sensor
• Sensing Range: ±16A
• Interface: Analog
• Sensitivity: 125.6 mV/A
• Voltage - Supply: 4.75 V ~ 5.25 V
• Embedded: No
• Utilized Ic / Part: FHS 40
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 398-1070

The sensitivity is therefore:
The next graph shows how the ouput voltage decreases when r increases.
Application information
Basic operation: example with a long thin conductor
A simple case is presented which illustrates the current to magnetic field and then to output voltage conversion.
A current flowing in a long thin conductor generates a flux density around it:
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Minisens is a galvanically isolated current transducer. It senses the magnetic field generated by the measured current and
transforms it into an output voltage.
If the current is bidirectional, Minisens will sense the polarity of the magnetic field and generate a positive or negative output
voltage relative to the reference voltage.
If Minisens is now placed in the vicinity of the conductor (with its sensitivity direction colinear to the flux density B), it will sense
the flux density and the output voltage will be:
where G
Note that the sensitivity also depends on the primary conductor shape.
with
B
is the Minisens magnetic sensitivity (600 V/T)
I
r
µ
P
Figure 8: Minisens orientation to measure the magnetic field generated by a current along a conductor
0
the current to be measured (A)
the distance from the center of the wire (m)
the permeability of vacuum (physical constant, µ
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
G
=
V
I
P
S
=
1
V
2 .
S
⋅
r
=
10
G
−
B
4
⋅
(
B
V
=
/
A
G
)
B
⋅
2
μ
π
0
⋅
I
r
P
=
1
2 .
0
⋅
= 4.
10
π
−
B
4
. 10
⋅
I
=
r
P
-7
(
2
V
μ
H/m)
π
0
)
⋅
I
r
P
T (
)
FHS 40-P/SP600
0 - 100A
www.lem.com
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