Is it possible to use one variable speed drive to run multiple motors at one time?
Issue:
Is it possible to use one VFD to run multiple motors at the same time?
Product Line:
Altivar Drives
Environment:
All
Cause:
Running two motors on one drive.
Resolution:
Selecting a Drive for multiple motor control
-Each motor needs to be running all at the same time.
-Programming each drive you need to sum the motor amps and HP for nominal motor current and rated motor power.
-The sum of the motor HP and motor FLA can not exceed the drives rated HP and nominal motor rated current.
-Each motor will need to have its own motor thermal protection device.
• 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.
Is it possible to use one VFD to run multiple motors at the same time?
Product Line:
Altivar Drives
Environment:
All
Cause:
Running two motors on one drive.
Resolution:
Selecting a Drive for multiple motor control
-Each motor needs to be running all at the same time.
-Programming each drive you need to sum the motor amps and HP for nominal motor current and rated motor power.
-The sum of the motor HP and motor FLA can not exceed the drives rated HP and nominal motor rated current.
-Each motor will need to have its own motor thermal protection device.
• 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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