Rockwell Automation Publication 750-IN100B-EN-P - July 2017 125
Power Wiring Chapter 5
(1) “Applied Rating” refers to the motor that will be connected to the drive. For example, a “F330” drive can be used in Normal Duty mode on a 315 kW motor, in Heavy Duty mode on a 250 kW motor or in Light Duty mode on a 355 kW motor. The drive can be programmed
for each mode. Wiring and fuses can be sized based on the programmed mode. For any given drive catalog number, Normal Duty mode provides higher continuous current but smaller overload current with respect to Heavy Duty mode. See parameter 35 [Duty Rating Cfg].
(2) These AC line fuses (with blown fuse indicators) are included in the drive to provide drive short circuit protection. AC input protection devices for branch circuit protection based on US NEC are listed in the table. Each LCL filter has one fuse per phase.
(3) Minimum protection device size is the lowest rated device that supplies maximum protection without nuisance tripping.
(4) Maximum protection device size is the highest rated device that supplies drive protection. For US NEC, minimum size is 125% of motor FLA. Ratings shown are maximum.
(5) Circuit Breaker - inverse time breaker. For US NEC, minimum size is 125% of motor FLA. Ratings shown are maximum.
(6) Recommended Motor circuit protector - Instantaneous trip circuit breaker. The trip setting should be set to the input current of the drive and should be sized for the continuous current of the system.
(7) These DC line fuses (with blown fuse indicators) are included in the drive to provide drive short circuit protection.
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