ABB ACS880-11 - Page 62

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/μ s)
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
Relative peak line-to-line voltage
Û
LL
/U
N
Relative du/dt value
(du/dt)/U
N
Note: Û
LL
and du/dt values are approximately 20% higher with resistor braking.
62 Guidelines for planning the electrical installation