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Is it possible to use one variable speed drive to run multiple motors at one time?

Published date: 12 November 2018

Issue:
Is it possible to use one variable speed drive to run multiple motors at one time?

Product Line:
Altivar Drives 

Environment:
All 

Cause:
Running two motors on one drive. 

Resolution:

SELECTING AN AFC FOR MULTIMOTOR CONTROL

You must comply with following requirements when applying more than one motor
with a single AFC:

• AFC selection with output current rating equal to or greater than the sum of all
motor full-load current ratings

• Overload protection included for each motor
When connecting multiple motors to a single AFC, you must ensure that each motor
is provided with overload and/or over temperature protection in accordance with Article
430, Part C of the National Electrical Code, and any applicable local electrical
codes. Square D Class 9065 or GV2-M overload devices can provide this protection.
The overload/over temperature protective means must interrupt current flow to the
motor either by causing a shutdown of the AFC or by opening the circuit feeding the
protected motor.
 

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