ABB ACH580-31 - Additional Note for Sine Filters

100 200 300
0.0
0.5
1.0
1.5
2.0
2.5
3.0
l (m)
du/dt
U
n
-------------(1/μs)
Û
LL
/U
n
A
Û
LL
/U
n
l (m)
du/dt
U
n
-------------(1/μs)
1.0
2.0
5.0
4.0
3.0
1.5
2.5
3.5
4.5
100 200 300
5.5
B
Drive with du/dt filterA
Drive without du/dt filterB
Motor cable length I
Nominal AC line voltage U
n
Relative peak line-to-line voltage Û
LL
/ U
n
Relative d u /d t value(d u /d t )/ U
n
Note: Û
LL
and d u /d t values are approximately 20% higher during the resistor braking.
Additional note for sine filters
A sine filter also protects the motor insulation system. The peak phase-to-phase
voltage with a sine filter is approximately 1.5 · U
n
.
Guidelines for planning the electrical installation 67