In-Rush Currents - Mitsubishi FX2NC DSS Series Hardware Manual

FX2NC Series Programmable Controllers
6.3.1

In-rush currents

These currents should be kept as low possible. The root mean square (I
Eqn 1 for (I
rms
-In-rush current (A)
I
r
I -Switch current (A)
s
Eqn 1
I × T + I × T
2
r r
=
I
rms
T + T + T
r
Ex.
4 × 0.02 + 0.4 × 0.7
2
0.2A=
0.02+0.7+10
)
-In-rush time (sec)
T
r
T -Switch time (sec)
s
-Operation time (sec)
T
f
Figure 6.9 :Current graph
2
s s
s f
I
2
T
r
I
s
T T
r s f
Outputs 6.
) <0.2A. Reference
rms
6-10