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LF210-S Arkusz danych(PDF) 6 Page - LEM

Numer części LF210-S
Szczegółowy opis  Current transducer
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Producent  LEM [LEM]
Strona internetowa  http://www.lem.co.jp/HQ/en
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LF210-S Arkusz danych(HTML) 6 Page - LEM

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26October2015/Version 5
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
www.lem.com
LF 210-S
Sensitivity and linearity
To measure sensitivity and linearity, the primary current (DC) is
cycled from 0 to I
PM, then to −IPM and back to 0 (equally spaced
I
PM/10 steps).
The sensitivity G is defined as the slope of the linear regression
line for a cycle between ±I
PM.
The linearity error ε
L is the maximum positive or negative
difference between the measured points and the linear
regression line, expressed in % of the maximum measured
value.
Magnetic offset
The magnetic offset I
OM is the change of offset after a given
current has been applied to the input. It is included in the linearity
error as long as the transducer remains in its measuring range.
Electrical offset
The electrical offset current I
OE is the residual output current
when the input current is zero.
−500 −400 −300 −200 −100
0
100
200
300
400
500
−0.1
−0.05
0
0.05
0.1
Primary Current (A)
Figure 5: Linearity
Performance parameters definition
Overall accuracy
The overall accuracy X
G is the error at ±IPN, relative to the rated
value I
PN.
It includes all errors mentioned above.
Response and reaction times
The response time t
r and the reaction time tra are shown in the
next figure.
Both slightly depend on the primary current di/dt. They are
measured at nominal current.
Figure 6: Response time t
r and reaction time tra
I
S
t
r
t
ra
t
90 %
10 %
100 %
I
P
I
Typical performance characteristics


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