The SMC-3 solid-state soft starter by Allen Bradley is low voltage, compact, and cost-effective Smart Motor Controller that features true three phase control, for superior speed control and a smoother, safer motor start-up and stop. The SMC-3 includes overload protection, integral bypass, and motor and system diagnostics to provide you with a flexible electrical motor control solution which reduces downtime and improves productivity.

The embedded bypass automatically closes when the motor has reached full speed to minimise heat generation. For fast diagnostics the SMC-3 also features a Hold To Test/Push To Reset button, which detects faults and enables the device to be reset. The LED display provides immediate status indication and assists with troubleshooting. Due to its convenient compact size this device uses less panel space and offers ease-of-installation. DIP switches ensure that set-up is efficient and secure, as they allow setting of the START/STOP profile, built-in overload, connection type, trip class and auxiliary contact characteristics.

Integration of the SMC-3 in your electrical motor control system results in less stress/shock to mechanical components due to decreased start-up torque, helping to extend the lifespan of your equipment. It protects against machine damage as line and motor diagnostics detect single-phase conditions. System maintenance is reduced due to lower peak currents during start-up, which lowers operating costs.

Allen Bradley offer a range of smart motor starters that will ensure reliable high performance and precision, giving you a long-lasting solution for your application.

• Quick, easy installation due to simple user interface
• Includes built-in silicon-controlled rectifier (SCR) bypass/run contactor
• Provides 3 to 480 A current range to suit your requirements
• Uses rated voltage: 200…690V AC, 50/60 Hz
• Includes five start and stop modes
• Provides embedded programmable electronic motor overload protection (DIP switch selectable - Trip class 10, 15 or 20)
• Includes a hold-to-test/push-to-reset button to allow fault finding and simple reset, reducing downtime
• Simplified and secure set-up using DIP switches
• Programming via Connected Components Workbench™ software
• Designed for full integration with the Allen-Bradley MCS range

Pumps
Conveyors
Fans
Lifts
Mixers
Chillers

Additional Information:
Frame size 1: 45mm wide, 3 phase control facilitating true soft start capability up to 20kW
Frame size 2: 72mm wide, 3 phase control facilitating true soft start capability up to 45kW
Seven ratings covering 3A to 37A
Phase rotation checking
Two control voltage ratings: 418-6934 24Vac/dc and 418-6861 100V to 240Vac. 50/60Hz over to 0 to 40°C
DIP switch-selectable starting methods (soft start 2 to 15 seconds, current limit, kick-start) and stopping methods (soft stop 100%, 200% or 300% of start time, coast to rest)

kW ratings based on current limit value of 350%. Product should always be selected by Motor Full Load Current

This smart soft-start controller from Rockwell Automation's Allen Bradley range provides a flexible motor control solution in a compact package. It features superior motor speed control and safe, smooth start-ups to reduce downtime and improve productivity. The device includes overload protection to prevent component damage from electrical surges, while its diagnostics system quickly lets you know when a problem occurs. The embedded bypass automatically closes when a motor has reached full speed to minimise heat generation and enhance system efficiency.

• LED (light-emitting diode) for immediate status indicating and assistance with troubleshooting
• Minimal panel space requirements with dimensions of 130 (L) x 72 (W) x 206mm (D)
• IP2X (ingress protection) rated housing prevents operators accidentally touching hazardous parts
• DIP (dual in-line package) switch for efficient and secure settings

• UL (Underwriters' Laboratories)
• CSA (Canadian Standards Authority)
• EN/IEC (European Norm / International Electrotechnical Commission)

When you integrate this device into your electrical motor control system, you'll benefit from less stress and shock to mechanical components. That's thanks to a decreased start-up torque that significantly extends the lifespan of equipment. In addition, system maintenance is reduced and operating costs are lowered due to lower peak currents during start-up.

Soft starters were developed to overcome the drawbacks of direct on line (DOL) and star-delta starting of single and three phase a.c. induction motors, such as high starting currents, voltage peaks and mechanical snatch. Allen Bradley motor starters provide advantages such as energy saving through reduced peak kVA, reduced starting torque, prolonged equipment life, minimised voltage dip problems, allowing minimum cable conductor size, and elimination of high current transients; when a 3-phase motor changes from Star to Delta.