ABB ACS880-M04 - Selecting the Du;Dt Filters

170 du/dt and common mode filtering
Selecting the du/dt filters
Warning! Use the du/dt filtering, common mode filtering, and insulated N-end
bearings according to the following table.
If you ignore these requirements, the motor life can shorten or damage to the motor
bearings can occur, and the warranty is not applicable.
du/dt filters are optional accessories and to be ordered separately. For more
information on common mode filtering, contact your local ABB representative.
Contact the motor manufacturer for information on the motor construction.
Motor type Nominal AC
supply
voltage
Requirement for
Motor
insulation
system
ABB du/dt and common mode filters,
insulated N-end motor bearings
P
N
< 100 kW and frame size < IEC 315
P
N
< 134 hp and frame size < NEMA 500
ABB motors
Random-wound
M2_, M3_ and M4_
U
N
< 500 V Standard -
Form-wound HX_
and AM_
U
N
< 500 V Standard -
Old* form-wound
HX_ and modular
U
N
< 500 V Check with
the motor
manufacture
r.
+ N + CMF
Random-wound
HX_ and AM_ **
0 V < U
N
<
500 V
Enamelled
wire with
fiber glass
taping
+ N + CMF
Non-ABB motors
Random-wound
and form-wound
U
N
< 420 V Standard:
Û
LL
=
1300 V
-
420 V < U
N
<
500 V
Standard:
Û
LL
= 1300
V
+ du/dt
or
Reinforced:
Û
LL
= 1600
V, 0.2
microsecond
rise time
-
*manufactured before 1.1.1998
**For motors manufactured before 1.1.1998, check for additional instructions with the motor
manufacturer.