Allen Bradley SMC-3 Softstarter – Find comprehensive resources for Allen Bradley SMC-3 softstarter, including product catalogs, manuals, price list, programming guides, fault, alarm, warnings & software support. Get expert assistance for troubleshooting and optimization.
Allen-Bradley SMC-3 is a popular and versatile soft starter designed for three-phase induction motors. It’s a cost-effective solution for controlling the acceleration and deceleration of motors, reducing mechanical and electrical stress on your equipment.
- SMC-3 Soft Starters are available with a current range from 3…480 A.
- They feature compact, true three-phase control in a cost-effective package.
- They include overload protection, integral bypass, and motor and system diagnostics
Features
- Provides 3…480 A range
- Uses rated voltage: 200…690V AC, 50/60 Hz
- Includes five start and stop modes
- Provides built-in electronic motor overload protection
- Includes hold-to-test/push-to-reset button
- Offers easy and secure setup using DIP switches
- Provides built-in silicon-controlled rectifier (SCR) bypass/run contactor
- Programming via Connected Components Workbench™ software
- This product is designed for many applications that include compressors, chillers, pumps, conveyors, and crushers
Applications:
- Compressors
- Pumps
- Fans
- Conveyor belts
- Chillers
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 15%, 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. (3…37 A, 2…15 s only)
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. (3…37 A, 2…15 s only)
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 coast to rest. 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.