ABB ACS800-U7 Hardware Manual page 38

38
3. Check that the motor voltage rating meets the application requirements:
If the drive is equipped
with ...
diode supply
U
U
U
See also section
4. Consult the motor manufacturer before using a motor in a drive system where the
motor nominal voltage differs from the AC power source voltage.
5. Ensure that the motor insulation system withstands the maximum peak voltage in
the motor terminals. See the
insulation system and drive filtering.
Example 1: When the supply voltage is 440 V and a drive with a diode supply is
operating in motor mode only, the maximum peak voltage in the motor terminals
can be approximated as follows: 440 V · 1.35 · 2 = 1190 V. Check that the motor
insulation system withstands this voltage.
Example 2: When the supply voltage is 440 V and the drive is equipped with an
IGBT supply, the maximum peak voltage in the motor terminals can be
approximated as follows: 440 V · 1.41 · 2 = 1241 V. Check that the motor
insulation system withstands this voltage.
Planning the electrical installation
= rated input voltage of the drive
N
= U /1.35
ACeq1 DC
= the maximum DC link voltage of the drive in V DC.
DC
For resistor braking: U
(Note: Nominal DC link voltage is U
Additional requirements for the braking applications
... and ...
no resistor braking is in use
frequent or long term brake cycles will
be used
= 1.21 × nominal DC link voltage.
DC
× 1.35 or U
N
Requirements table
... then the motor voltage
rating should be ...
U
N
U
ACeq1
× 1.41 in V DC.)
N
on page 42.
below for the required motor