ABB ACS 600 - Page 18

Note 6: Calculating the Rise Time and the Peak Line-to-line Voltage
The peak line-to-line voltage at the motor terminals generated by the ACS 600 as well
as the voltage rise time depend on the cable length. The requirements for the motor
insulation system given in the table are “worst case” requirements covering the
ACS 600 installations with 30 metre and longer cables. The rise time can be calculated
as follows: t = 0.8 · Û
LL
/(du/dt). Read Û
LL
and du/dt from the diagrams below.
du/dt / (kV/ms)
Û
LL
/ U
N
Cable length (m)
0
100 200 300 400
4
3.5
3
2.5
2
1.5
1
0.5
0
du/dt / (kV/ms)
Û
LL
/ U
N
4
3.5
3
2.5
2
1.5
1
0
100 200 300 400
0.5
0
Cable length (m)
Without du/dt Filter With du/dt Filter
3BFE 64408836 R0125 REV A EFFECTIVE: 15.1.2001 EN
ABB Industry Oy
Drives
P. O . B o x 1 8 4
FIN-00381 HELSINKI
FINLAND
Telephone +358 10 22 2000
Telefax +358 10 22 22681
Internet http://www.abb.com/automation
Motor Insulation and Drive Output Filter Requirements for ACS 600 Drives