Rockwell-automation 1560E SMC Flex Smart Motor Controller Manuel d'utilisateur télécharger pdf (Page 65)

Installation 2-17

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Motor Overload Protection Thermal motor overload protection is provided as standard (though it must

be programmed) with the MV SMC-Flex controller. If the overload trip

class is less than the acceleration time of the motor, nuisance tripping may

occur.

Overload protection should be properly coordinated with

the motor to avoid damage to equipment.

Two special applications require consideration: Two-speed Motors, and

Multi-motor Protection.

Two-speed Motors

The MV SMC-Flex controller has overload protection available for single

speed motors. When the MV SMC-Flex controller is applied to a two-speed

motor, the Overload Class parameter must be programmed to OFF, and

separate overload relays must be provided for each speed.

Multi-motor Protection

The MV SMC-Flex controller provides overload protection for only one

motor. When the MV SMC-Flex is controlling more than one motor, the

Overload Class Parameter must be programmed to OFF, and individual

overload protection is required for each motor.

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Rockwell-automation 1560E SMC Flex Smart Motor Controller Manuel d'utilisateur Page 65