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Operating the Drive
6-20
AC890PX AC Drive
Using Multiple Motors on a Single Drive
A single large drive can be used to supply several smaller motors provided that each
individual motor has overload protection.
NOTE
Conventional V/F control strategy must be enabled for use with parallel motors.
(Sensorless vector control strategy cannot be used). See the VECTOR ENABLE
parameter under VECTOR SET-UP menu at level 2.
The drive must be rated to supply the
total motor current
. It is not sufficient to simply
sum the power ratings of the motors, since the drive has also to supply the magnetising
current for each motor.
Note that the overload device will not prevent the motor overheating due to inadequate
cooling at low speed. Force vented motors may be required; consult your motor supplier.
Figure 3.14
Single Drives supplying Multiple Motors
WARNING
All motors should be connected to the drive output before the
START
command is
given.
Caution
Restrict the total cable length on multiple motor installations as follows:
50 metres with no output choke fitted, 300 metres with choke.
M1
M2
VSD
OL1
OL2
M1/U
M2/V
M3/W
Summary of Contents for AC890PX Series
Page 17: ...2 5 Product Overview AC890PX AC Drive 890PX bottom wire entry ...
Page 144: ...The Keypad 7 9 AC890PX AC Drive The Menu System Map ...
Page 145: ...7 10 The Keypad AC890PX AC Drive The Menu System Map continued ...
Page 328: ...Programming D 88 AC890PX AC Drive Functional Description ...
Page 386: ...Programming D 146 AC890PX AC Drive Setpoint Drive Frequency Frequency 1 Frequency 2 ...