Additional Data For Calculating The Rise Time And The Peak Line-To-Line Voltage; Additional Note For Common Mode Filters; Selecting The Power Cables; General Rules - ABB ACS580-04 Hardware Manual

Additional data for calculating the rise time and the peak line-to-line voltage

The diagrams below show the relative peak line-to-line voltage and rate of change of
voltage as a function of the motor cable length with and without a du/dt filter in use.
To calculate the actual peak voltage for a certain cable length read the relative Û
value from the appropriate diagram and multiply it by the nominal supply voltage (U
To calculate the actual voltage rise time for a certain cable length read the relative values
Û /U and (du/dt)/U
LL N
supply voltage (U ) and substitute into equation t = 0.8 · Û
N
3.0
2.5
2.0
1.5
1.0
0.5
0.0
100
Drive with du/dt filter
I Motor cable length
Û /U Relative peak line-to-line voltage
LL N
du/dt /U Relative du/dt value
N
Note: ÛLL and du/dt values are approximately 20% higher with resistor braking.

Additional note for common mode filters

Common mode filters are available as plus code option +E208.

Selecting the power cables

General rules


Select the input power and motor cables according to local regulations:
•
Select a cable capable of carrying the drive nominal current. See section
(page 113) for the rated currents.
•
Select a cable rated for at least 70
conductor in continuous use. For US, see
•
The inductance and impedance of the PE conductor/cable (grounding wire) must be
rated according to permissible touch voltage appearing under fault conditions (so that
the fault point voltage will not rise excessively when a ground fault occurs).
•
600 V AC cable is accepted for up to 500 V AC.
Use symmetrical shielded motor cables (see page 57). Ground motor cable shields 360° at
both ends. Keep the motor cable and its PE pigtail (twisted shield) as short as possible to
reduce high-frequency electromagnetic emissions.
from the appropriate diagram. Multiply the values by the nominal
N
Û /U
LL N
du/dt
------------ - (1/s)
U N
200 300
l (m)
°
C (158
Guidelines for planning the electrical installation 55
/(du/dt).
LL
5.5
5.0
du/dt
------------ - (1/s)
U N
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
100
Drive without du/dt filter
°
F) maximum permissible temperature of
Selecting the control cables,
/U
LL N
).
N
Û /U
LL N
200 300
l (m)
Ratings
page 58.