Electric Motor Control Basics - Book - Page 5
Industrial Control Basics: Part 1, Contactors
How the Contactor Operates
Operating Principle of a Contactor: The current passing through the contactor excites
the electromagnet. The excited electromagnet produces a magnetic field, causing the
contactor core to move the armature. A normally closed (NC) contact completes the
circuit between the fixed contacts and the moving contacts. This permits the current
to pass through these contacts to the load. When current is removed, the coil is deenergized and opens the circuit. The contacts of the contactors are known for their
rapid open and close action.
Industrial Control
Basics:
Part 1, Contactors
Industrial Control
Basics: Part 2,
Overload Relays
Industrial Control
Basics: Part 3,
Starters
Working on a Contactor
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
05
