ABB ACS 600 Hardware Manual page 9

Without Filtering
With du/dt Filter
ACS/ACC/ACP 604/607 Frequency Converters
Symbol
U
N
Ó
LL
:
Rise time
= 0.8 · /(du/dt)
t
Ó
LL
Below is a diagram of
no du/dt filter is used.
4
3.5
Ó
3
2.5
2
1.5
1
0.5
0
0
100
Below is a diagram of
du/dt filter at the output of the ACx 600.
4
3.5
3
2.5
2
1.5
1
0.5
0
0
100
Definition
nominal mains voltage
peak line to line voltage at motor terminals
Rise time is line to line voltage change rate
at motor terminals (the interval during
which the voltage changes from 10 % to
90 % of the whole voltage range)
Û and t depend on cable length. R
LL
‡urÉhyˆr†Ã‚sÃÓ
diagrams below.
and du/dt as a function of cable length when
Ó
LL
/ U
LL N
du/dt / (kV/µs)
200 300
and du/dt as a function of cable length with
Ó
LL
/ U
Ó
LL N
du/dt / (kV/µs)
200 300
ACx = ACS/ACC/ACP
Safety Instructions
rhqÃ
and du/dt from the
LL
Cable length (m)
400
Cable length (m)
400
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