Catalogs >
Industrial Controls Catalog >
Motor Control, Solid-State >
Soft Starters >
SMC™-3 Smart Motor Controllers
SMC™-3 Smart Motor Controllers
Modes of Operation
Soft Start
This method has the most general application. The motor is raised from an initial torque value to full voltage. This initial torque can be adjusted to 0%, 25%, 35%, or 65% of locked rotor torque. The motor voltage is gradually increased during the acceleration ramp time, which can be adjusted from 2, 5, 10, 15, 20, 25, or 30 s.
Current Limit Start
This starting mode is used when it is necessary to limit the maximum starting current. It can be adjusted to 150%, 250%, 350%, or 450% of full load amps. Start times are selectable from 2, 5, 10, 15, 20, 25, or 30 s.
Selectable Kick Start
A kickstart, or boost, at the beginning of the start mode is intended to provide a current pulse of 450% of full load current. The kickstart time is adjustable from 0.5…1.5 seconds. This allows the motor to develop additional torque during starting for loads which may need a boost to get initial shaft rotation.
Soft Stop
The Soft Stop function can be used with applications that require an extended stop time. When enabled, the voltage ramp down time can be selected to one, two, or three times the starting time. The motor will stop when the motor voltage drops to a point where the load torque is greater than the motor torque.
