Electric Motor Control Basics - Book - Page 39
Industrial Control Basics: Part 3, Starters
5. Star Delta Starter
Star Delta Starter
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
Compared to the other types of starters, the star delta starter is used on a large scale.
As the name suggests, the three windings are connected in a star connection in the
star delta starters. A certain time is set by the timer or any other controller circuit.
After this time is passed, the windings are then connected in the delta connection.
The phase voltage in the star connection is reduced to 58%, and the total current
drawn is 58% of normal current. This results in a reduced torque.
The Advantages of Using Star Delta Motor Starters:
• They are ideal for long acceleration times.
• They have a lower input surge current when compared to other starters.
• They have a simpler construction as compared to other starters.
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
39
