ABB ACH580-01 Series, Hardware Manual, Page: 85 / 396

Guidelines for planning the electrical installation 85
The abbreviations used in the table are defined below.
Additional requirements for the braking applications
When the motor brakes the machinery, the intermediate circuit DC voltage of the
drive increases, the effect being similar to increasing the motor supply voltage by up
to 20 percent. Consider this voltage increase when specifying the motor insulation
requirements if the motor will be braking a large part of its operation time.
Example: Motor insulation requirement for a 400 V AC line voltage application must
be selected as if the drive were supplied with 480 V.
Non-ABB motors
Random-
wound
and form-
wound U
N
< 420 V Standard:
Û
LL
= 1300 V
- + N or CMF
420 V < U
N
< 500 V Standard:
Û
LL
= 1300 V
+ d u /d t + d u /d t + (N or CMF)
or
Reinforced:
Û
LL
= 1600 V,
0.2
microsecond
rise time
- + N or CMF
Abbr. Definition
U
N
Nominal AC line voltage
Û
LL
Peak line-to-line voltage at motor terminals which the motor insulation must
withstand
P
N
Motor nominal power
d u /d t d u /d t filter at the output of the drive. Available from ABB as an optional add-on kit.
CMF Common mode filter. Depending on the drive type, CMF is available from ABB as
an optional add-on kit.
N N-end bearing: insulated motor non-drive end bearing
n.a. Motors of this power range are not available as standard units. Consult the motor
manufacturer.
Motor
type
Nominal AC supply
voltage
Requirement for
Motor
insulation
system
ABB d u /d t and common mode filters,
insulated N-end motor bearings
P
N
< 100 kW
and frame size
< IEC 315
100 kW < P
N
< 350 kW
or
IEC 315 < frame size <
IEC 400
P
N
< 134 hp
and frame size
< NEMA 500
134 hp < P
N
< 469 hp
or
NEMA 500 < frame
size < NEMA 580