Electric Motor Control Basics - Book - Page 38
Industrial Control Basics: Part 3, Starters
Industrial Control
Basics:
Part 1, Contactors
4. Auto Transformer Starter
Auto Transformer Starter
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
With an auto transformer starter, the transformer supplies a certain percentage
of the primary voltage to the secondary of the transformer. The auto transformer
is connected in a star configuration. The three tapped secondary coils of the
transformer are connected to the three motor phases in this type of starter. This
helps in reducing the voltage that is being applied to the motor terminals.
The Advantages of Using Auto Transformer Motor Starters:
• They can be used for manual speed control, but with limited options.
• They have extremely flexible starting characteristics.
• They have a high output torque.
Applying Motor Control
in a Wastewater
Application
NEMA vs IEC Motor
Controls
Understanding
IP Ratings
38
