ACS550-02/U2 User’s Manual 17
Planning the electrical installation
The abbreviations used in the table are defined below.
* Common mode filter (CMF) is included in ACS550-02/U2 as standard.
Random wound ABB motors and generators of series M2_ and M3_
Random wound
standard motors (non-
Ex) and generators
U
N
< 500 V P
N
< 100 kW P
N
> 100 kW or
IEC 315 < frame size <
IEC 355
P
N
> 350 kW or
IEC 400 < frame size <
IEC 450
Standard
motor
Standard motor
+ insulated N-bearing
Standard motor
+ insulated N-bearing
+ common mode filter *
Random wound high-
output motors and
other non-harmonized
designs
U
N
< 500 V P
N
< 55 kW P
N
> 55 kW P
N
> 200 kW
Standard
motor
Standard motor
+ insulated N-bearing
Standard motor
+ insulated N-bearing
+ common mode filter *
Random wound motors
for hazardous
environments
(Ex-motors)
U
N
< 500 V < IEC 250 > IEC 280 > IEC 355
Standard
motor
Standard motor
+ insulated N-bearing
Standard motor
+ insulated N-bearing
+ common mode filter *
Random wound ABB motors and generators of series HX_ and AM_
0 < U
N
< 500 V Winding type Protective measures
Enamelled wire with fibre glass taping + insulated N-bearing
Form wound low voltage ABB motors of series AM_ and HX_
Protective measures
• insulated bearing construction
• common mode filter (CMF)
Non-ABB motors, random wound and form wound windings
Insulation level Protective measures
P
N
< 100 kW 100 kW < P
N
< 350 kW P
N
> 350 kW
Standard Û
LL
= 1300 V 0 < U
N
< 420 V - + insulated N-bearing + insulated N-bearing
Standard Û
LL
= 1300 V 420 V < U
N
< 500 V + du/dt + du/dt + du/dt
+ insulated N-bearing
Reinforced 0.2 V/us 420 V < U
N
< 500 V - - + insulated N-bearing
Abbreviation Definition
U
N
nominal voltage of the supply network
Û
LL
peak line-to-line voltage at motor terminals which the motor insulation must withstand
P
N
motor nominal power
du/dt du/dt filter at the output of the drive or internal du/dt limitation. Contact ABB.
N N-end bearing: insulated motor non-drive end bearing
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