LAX-100-NP Datasheet, PDF (10/12 Pages) LEM – Current Transducer LAX SERIES

LAX series 16-100 A
Application data
The LAX 100-NP has been designed to be used at nominal currents from 16 to 100 A. The 3 primary jumpers allow the
adaptation of the number of primary turns N to the application so as to achieve the best compromise between nominal
P
current, measuring range and secondary current:
Primary
nominal
current rms
I_PN (A)
Number of
primary turns
N_P
Secondary
nominal
current rms
I_SN (mA)
100
1
50
50
1
25
33.3
2
33.3
33.3
3
50
25
2
25
16.7
3
25
Primary
current,
measuring
range
I_PM (A)
160
160
80
53
75
50
Primary
coil
resistance
@ 20°C
R_P (µΩ)
90
90
400
800
400
800
Primary
insertion
inductance
L_P (nH)
15
15
60
136
60
136
Connections (see PCB
layout )
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
OUT
IN
OUT
See also the paragraph "performance parameters definition: transducer simplified model" for more details about ampere-
turns and output current.
High and low speed PCB designs
The PCB design is very important to achieve good linearity and frequency response with the LAX 100-NP.
High speed designs are best for accuracy, high frequency response and low response times.
High speed design
Low speed design
I_P
I_P
070615/8
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice.
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