Solid-state soft starters control three-phase ac induction motors

AutomationDirect’s Stellar soft starters include the SR44 series of solid-state starters, feature adjustable motor start, stop times.


AutomationDirect’s line of Stellar soft starters now includes the SR44 series of solid-state soft starters to control three-phase ac induction motors. The fully digital SR44 soft starters use thyristors in all three motor phases to provide controlled reduced voltage motor control for smooth acceleration/deceleration and reduced mechanical shock and starting stress.ADC Stellar Soft Starter

The SR44 series features 115 or 230 V ac selectable control voltage, as well as easily and separately adjustable motor start and stop times. The Automatic Application Setup feature fully configures the starter for specific applications with one entry. The advanced energy-saving Optimizing Mode improves motor efficiency and power while delivering the demanded torque at low rpm.

These fully programmable units are equipped with six-button keypads with two-line, 32-character displays; programmable I/O for remote control applications include a single digital input and two relay outputs. An optional Modbus communication card and remote keypad are also available.

Suitable for a variety of motor loads, Stellar SR44 soft starters can be used for motor reversing, with external contactors, and can be connected “in-delta,” allowing for use of a smaller soft starter.

Stellar SR44 soft starters are UL listed, CE, REACH, and RoHS approved.


- Edited by Gust Gianos, CFE Media, Control Engineering,

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Learn how to create value with re-use; gain productivity with lean automation and connectivity, and optimize panel design and construction.
Machine design tips: Pneumatic or electric; Software upgrades; Ethernet advantages; Additive manufacturing; Engineering Leaders; Product exclusives: PLC, HMI, IO
Industrial wireless cyber security: More complex than black and white; IIoT at the I/O level; Process modeling; Cyber security research
Robotic advances: Software, form factors; System-based ROI; Embedded control; MES and information integration; SCADA and cyber security; Position sensor; Controller, I/O module
Learn how Industry 4.0 adds supply chain efficiency, optimizes pricing, improves quality, and more.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Drilling for Big Data: Managing the flow of information; Big data drilldown series: Challenge and opportunity; OT to IT: Creating a circle of improvement; Industry loses best workers, again
Pipeline vulnerabilities? Securing hydrocarbon transit; Predictive analytics hit the mainstream; Dirty pipelines decrease flow, production—pig your line; Ensuring pipeline physical and cyber security
Cyber security attack: The threat is real; Hacking O&G control systems: Understanding the cyber risk; The active cyber defense cycle