Abbreviations
DefinitionAbbr.
Nominal AC line voltage
U
n
Peak line-to-line voltage at motor terminals which the motor insulation
must withstand
Û
LL
Motor nominal power
P
n
d
u
/d
t
filter at the output of the drived
u
/d
t
Common mode filter of the driveCMF
N-end bearing: insulated motor non-drive end bearingN
Motors of this power range are not available as standard units. Consult
the motor manufacturer.
n.a.
Availability of d
u
/d
t
filter and common mode filter by drive type
See chapter Common mode, d
u
/d
t
and sine filters
Additional requirements for explosion-safe (EX) motors
If you use an explosion-safe (EX) motor, obey the rules in the requirements table
above. In addition, consult the motor manufacturer for any further requirements.
Additional requirements for ABB motors of types other than M2_, M3_, M4_, HX_
and AM_
Use the selection criteria given for non-ABB motors.
Additional requirements for braking applications
When the motor brakes the machinery, the intermediate circuit DC voltage of the
drive increases, the effect being similar to the motor supply voltage increasing 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.
Additional requirements for the regenerative and low harmonics drives
It is possible to increase the intermediate circuit DC voltage from the nominal
(standard) level with a parameter in the control program. If you choose to do this,
select the motor insulation system which withstands the increased DC voltage
level.
102 Guidelines for planning the electrical installation
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