Introducing the MST Soft Starter with six SCR three-phase voltage control that offers advanced protection for the motor, the soft starter and the load, ensuring trouble-free operation. Available from 7.5 to 1000 horsepower at 208 to 575 Vac (volts alternating current), this product is suitable for a wide variety of applications including pumps, compressors, fans, conveyors, mixers and stirrers.
Baldor’s MST Digital Soft Starter features programmable torque control, providing a more linear acceleration during start that reduces wear and tear, and during stop, virtually eliminates pump water hammer. This torque control function was developed and tested in collaboration with pump manufacturers to ensure the best possible stop without water hammer and pressure surges. The product also offers integrated advanced motor protection with current sensing, programmable signal relays, programmable analog output and a built-in keypad interface.
MST Digital Soft Starters are available in two styles, an open starter or an enclosed combination starter. The open starter has a smaller footprint that makes mounting easy, and is loaded with high-end features that improve performance and save energy. The enclosed combination starter combines over current protection and overload protection in a single package. (MST Digital Soft Starter Information Flyer - PDF)
Features
Three Phase Power Range: 7.5 Hp – 1000 Hp (30A – 1040A); 208V – 575V; 50/60 Hz
Open Starters: with two inputs and three form C outputs, all programmable
Enclosed Combination Starters: include NEMA 12/4 enclosure, bypass contactor, door mounted disconnect, input circuit breaker, 2-wire switch for hand/off/auto, and indicator lights
Programmable Torque Control: current sensing provides true torque control. During start, gives a more linear acceleration, reducing wear and tear. During stop, eliminates pump water hammer
Torque Limit: can be enabled to minimize stress and wear on motors and equipment
Integrated By-pass Contactor: units over 300 amps have integrated contactors, reducing power loss during run by 90% or more
Integrated Advanced Motor Protection with Current Sensing: provides overload protection, high current, underload, phase imbalance, phase reversal, and by-pass monitor
Programmable Signal Relays: three signal relays can be programmed for run, top of ramp, protections, faults and warnings
Programmable Analog Output: can be programmed for motor current, mains voltage, active power, motor temperature plus others
Keypad Interface: standard; external keypad – optional
Baldor ProSoft for PC: to precisely select the optimal starter for your needs
Soft Starter Simulator for PC: to simulate keypad operation on you PC
Typical Applications
Normal Starting Class 10:
- Bow Thruster
- Compressor
- Elevator
- Centrifugal pump
- Conveyor belt (short)
- Escalator
Heavy Duty Starting Class 30:
- Centrifugal fan
- Crusher
- Mill
- Conveyor belt (long)
- Mixer
- Stirrer
