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    What is the difference between Normal Duty versus Heavy Duty for the Altivar Process Drive?

    Issue:
    Altivar Process Drive understanding Normal vs Heavy Duty?

    Product Line:
    Altivar Process Drive (ATV630, ATV930, ATV650, ATV950, ATV660, ATV960, ATV680, ATV980)

    Environment:
    All of the Altivar Process Drives

    Cause:
    None

    Resolution:

    Explanation
    The main difference lies within the overload capability of the drive. This setting adjusts the drives current limitations. 
    The "Current Limitation" limits your current based on the overload capability setting of the drive for a maximum time frame of 60s.
    Typically this is your initial starting current
    The drive overload capability can be changed by adjusting the "Dual Rating" parameter in the drive (under menu 5.2 Motor Parameters). There are 2 different settings: Normal Duty / Normal Rating and Heavy Duty / High rating.

    To access the parameter:
    [Complete settings] [Motor parameters] [Dual Rating] drt

    Overload Capability
    ATV600:
    ND +10% (Current Limitations up to 110% of rated current)
    HD +50% (Current Limitations up to 150% of rated current)

    ATV900:
    ND +20% (Current Limitations up to 120% of rated current)
    HD +50% (Current Limitations up to 150% of rated current)

    Understand that when changing the overload capability from normal duty to heavy duty you are derating the drive to a lower hp size.
    Example below:
    ATV630D75N4
    ND +10% (110%) = Drive Rating of 100hp @ 480 Vac
    HD +50% (150%) = Drive Rating of 75hp @ 480 Vac


    Tips:
    When doing a drive selection, its always a good idea to choose a heavy duty drive if you are not certain the Normal Duty rating will be sufficent.
    Use the links below to access the ATV630 and ATV930 installation manuals and look in the Technical Data section under Electrical Data to find the details on Normal Duty and Heavy Duty.

    ATV630 Installation Manual:  https://www.schneider-electric.com/en/download/document/EAV64301/
    ATV930 Installation Manual:  https://www.schneider-electric.com/en/download/document/NHA80932/

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