Additional Requirements For Non-Abb High-Output And Ip23 Motors; Additional Data For Calculating The Rise Time And The Peak Line-To-Line Voltage - ABB ACS880 Manual

26 Electrical planning guidelines

Additional requirements for non-ABB high-output and IP23 motors

The rated output power of high-output motors is higher than what is stated for the
particular frame size in EN 50347 (2001).
If you plan to use a non-ABB high-output motor or an IP23 motor, consider these
additional requirements for protecting the motor insulation and bearings in drive
systems:
• If motor power is below 350 kW: Equip the drive and/or motor with the filters
and/or bearings according to the table below.
• If motor power is above 350 kW: Consult the motor manufacturer.
Nominal AC supply
voltage
U ≤ 420 V
n
420 V < U < 500 V
n
500 V < U ≤ 600 V
n
600 V < U
≤ 690 V
n
1) If the intermediate DC circuit voltage of the drive is increased from the nominal level due to long term resistor
braking cycles, check with the motor manufacturer if additional output filters are needed.

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. If you need to calculate the actual
peak voltage and voltage rise time considering the actual cable length, proceed as
follows:
Peak line-to line voltage: Read the relative Û
•
and multiply it by the nominal supply voltage ( U
• Voltage rise time: Read the relative values Û
below. Multiply the values by the nominal supply voltage ( U
equation t = 0.8 · Û
Motor insulation system
Standard: Û = 1300 V
LL
Standard: Û = 1300 V
LL
Reinforced: Û
= 1600 V,
LL
0.2 microsecond rise time
Reinforced: Û = 1600 V
LL
Reinforced: Û = 1800 V
LL
Reinforced: Û
= 1800 V
LL
Reinforced: Û = 2000 V,
LL
0.3 microsecond rise
1)
time
/(d u /d t ).
LL
Requirement for
ABB d u /d t and common mode filters, insulated N-
end motor bearings
P < 100 kW or frame size
n
< IEC 315
P < 134 hp or frame size
n
< NEMA 500
+ N or CMF
+ d u /d t + (N or CMF)
+ N or CMF
+ d u /d t + (N or CMF)
+ N or CMF
+ N + d u /d t
+ N + CMF
/ U
value from the diagram below
LL n
).
n
/ U and (d u /d t )/ U
LL n
100 kW < P < 350 kW or
n
IEC 315 < frame size < IEC
400
134 hp < P < 469 hp or
n
NEMA 500 < frame size <
NEMA 580
+ N or CMF
+ N + d u /d t + CMF
+ N or CMF
+ N + d u /d t + CMF
+ N + CMF
+ N + d u /d t + CMF
+ N + CMF
from the diagram
n
) and substitute into
n