Planning the electrical installation
39
Requirements table
The following table shows how to select the motor insulation system and when an
optional ABB du/dt filter, insulated N-end (non-driven end) motor bearings and ABB
common mode filters are required. Ignoring the requirements or improper installation
may shorten motor life or damage the motor bearings and voids the warranty.
Manufacturer
Motor type Nominal mains
voltage (AC line
voltage)
Requirement for
Motor insulation
system
ABB du/dt filter, insulated N-end bearing and ABB common mode
filter
P
N
< 100 kW
and
frame size < IEC 315
100 kW <
P
N
< 350 kW
or
frame size >
IEC 315
P
N
> 350 kW
or
frame size >
IEC 400
P
N
< 134 hp
and
frame size <
NEMA 500
134 hp <
P
N
< 469 hp
or
frame size >
NEMA 500
P
N
> 469 hp
or
frame size >
NEMA 580
A
B
B
Random-
wound M2_,
M3_ and
M4_
U
N
< 500 V Standard - + N + N + CMF
500 V < U
N
< 600 V Standard + du/dt + du/dt + N + du/dt + N + CMF
or
Reinforced - + N + N + CMF
600 V < U
N
< 690 V
(cable length <
150 m)
Reinforced + du/dt + du/dt + N + du/dt + N + CMF
600 V < U
N
< 690 V
(cable length >
150 m)
Reinforced - + N + N + CMF
Form-wound
HX_ and
AM_
380 V < U
N
< 690 V Standard n.a. + N + CMF P
N
< 500 kW: + N +
CMF
P
N
> 500 kW: + N +
CMF + du/dt
Old* form-
wound HX_
and modular
380 V < U
N
< 690 V Check with the motor
manufacturer.
+ du/dt with voltages over 500 V + N + CMF
Random-
wound HX_
and AM_ **
0 V < U
N
< 500 V Enamelled wire with
fibre glass taping
+ N + CMF
500 V < U
N
< 690 V + du/dt + N + CMF
HDP Consult the motor manufacturer.