Altivar Process variable speed drives are designed for use in two operating modes that can optimize the drive nominal rating according to the system constraints.

These two modes are:

• Normal duty (ND):

Dedicated mode for applications requiring a slight overload (up to 110%) with a motor power no higher than the drive nominal power.
The drive is designed to run up to 60 s at 110% of nominal current.

• Heavy duty (HD):

Dedicated mode for applications requiring a significant overload (up to 150%) with a motor power no higher than the drive nominal power derated by one rating.
The drive is designed to run up to 60 s at 150% of nominal current.



Refer to attached document for Drive Ratings in Normal and Heavy Duty

Released for: Schneider Electric Saudi Arabia