The drive can have a heavy duty rating intended for applications where high overload current may be required under transient conditions, or it can have

a normal duty rating where a lower level of overload current is required. The duty rating is selected automatically by the drive based on the setting of

Rated Current (05.007). The Maximum Heavy Duty Rating (11.032) and Maximum Rated Current (11.060) are fixed for each drive size and the table

below shows the possible duty ratings that can be selected depending on the levels of these parameters.

Conditions

Maximum Heavy Duty Rating (11.032) = 0.00

Maximum Heavy Duty Rating (11.032) <

Maximum Rated Current (11.060)

Maximum Heavy Duty Rating (11.032) =

Maximum Rated Current (11.060)

The different duty ratings modify the motor protection characteristic (see Motor Thermal Time Constant 1 (04.015)). The different duty ratings can also

change the level of I

as described previously.

MaxRef

In a drive that contains multiple power modules Full Scale Current Kc (11.061) is the full scale current of an individual module multiplied by the number

of modules. Maximum Heavy Duty Rating (11.032) and Maximum Rated Current (11.060) are the value for an individual module multiplied by the

number of modules.

) is equal to 1.1 x Maximum Rated Current (11.060) or 0.7 x Kc whichever is lower.

MaxRef

Possible duty ratings

Normal duty operation only

Heavy duty operation if rated current > MAX, otherwise

normal duty operation

Heavy duty operation only

Powerdrive F300 Parameter Reference Guide

Issue: 01.15.00