Electric Motor Control Basics - Book - Page 63
Applying Motor Control in a Wastewater Application
7. Soft Starter:
Between the simplicity of a DOL motor starter and the complexity of a VFD sits the
Soft Starter. Electric motors often require large amounts of electricity during their
acceleration. A soft starter can be used to limit the surge of current torque of the
electric motors, resulting in a smoother startup. Soft starters can protect an electric
motor from possible damage and at the same time extend the lifespan of your electric
motor by reducing the heat caused by frequent starting and stopping. Soft Starters
limit the large inrush current demands on the electrical supply system. Soft Starters
are used with pumps in a process which requires to bring them up slowly to reduce
pressure surges in the water system.
Industrial Control
Basics:
Part 1, Contactors
Industrial Control
Basics: Part 2,
Overload Relays
Industrial Control
Basics: Part 3,
Starters
The Benefits of Type E/F
Motor Protection
Circuit Breakers
Basic Pump Control:
Three Phase DOL Starter
Control of an Electric Pump
Applying Motor Control
in a Wastewater
Application
NEMA vs IEC Motor
Controls
Understanding
IP Ratings
63
