What is Contactor ?
To start up and shut down a three-phase AC induction motor, any three-pole switch with a suitable current rating will suffice. Simply closing such a switch to send three-phase power...
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Permissive and Interlock Circuits
A practical application of switch and relay logic is in control systems where several process conditions have to be met before a piece of equipment is allowed to start. A...
Contactors
When a relay is used to switch a large amount of electrical power through its contacts, it is designated by a special name: contactor. Contactors typically have multiple contacts, and those contacts are...