DoElect

Contactors are material that are used for switching electrical power circuit. They are very similar to a relay but are used for switching high power circuit i.e 415V or more. Contactors are mostly used for switching 3-phase power from the supply to load through their power contact to control loads such as: motor, generator e.t.c either to switch them ON or OFF. Basic Principle of Operation It works with the principle of electromagnetic induction i.e when current passes through a metallic conductor it tends to exhibit and develop a magnetic property. The contactor is typically made of laminated core material to generate the require electromagnet. So, when current flows through it, magnetic property is develop on this core and causes the contact L1,L2and L3 to close with T1, T2, T3 and thus allow the passage of the 3-phase supply to the load. PARTS OF A CONTACTOR -The Power Contacts - The control contact / auxiliary contact Contactor coil The power contact is