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.
Requirement forNominal AC supply
voltage
ABB du/dt and common mode filters, insulated N-
end motor bearings
Motor insulation system
100 kW < P
N
< 350 kW or
IEC 315 < frame size <
IEC 400
P
N
< 100 kW or frame
size < IEC 315
134 hp < P
N
< 469 hp or
NEMA 500 < frame size <
NEMA 580
P
N
< 134 hp or frame size
< NEMA 500
+ N or CMF+ N or CMF
Standard: Û
LL
= 1300 VU
N
≤ 500 V
+ N + du/dt + CMF+ du/dt + (N or CMF)Standard: Û
LL
= 1300 V420 V < U
N
< 500 V
or
+ N or CMF+ N or CMF
Reinforced: Û
LL
= 1600 V,
0.2 microsecond rise time
+ N + du/dt + CMF+ du/dt + (N or CMF)Reinforced: Û
LL
= 1600 V500 V < U
N
≤ 600 V
or
+ N + CMF+ N or CMF
Reinforced: Û
LL
= 1800 V
+ N + du/dt + CMF+ N + du/dtReinforced: Û
LL
= 1800 V600 V < U
N
≤ 690 V
+ N + CMF+ N + CMF
Reinforced: Û
LL
= 2000 V,
0.3 microsecond rise
time
1)
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 in the applied drive operation range.
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
. Check the availability of the sine filter from ABB.
22 Electrical planning guidelines
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