Interview releted Questions and answers Power and control contector What is contector? Different between Power and control contector How to selection of Contector? Types of Contector

What is Electrical Contector?

Short Definition for Interview:

electrical Contector One types of Electromagnetic switch whenever supply apply on contector Coil (A1 , A2).

Coil will be energiz produce Megnetic force at that time contector contect will be Close.

Working Principle of contector

The function of a contactor is , when connect the power supply to the contactor coil , then contactor on and connect the contact points . When the supply is removed , the contactor point separates . Depending on the number of poles , coil voltage , AC and DC , different contactors are available in the market.

Contector Releted Important terms

What is Axiliary contactor?

Axiliary contactor is a part with several additional contact points that can be mounted on top of the contactor . There are two types of contact points : normally open and normally close.

What is Axiliary add on block ?

Axiliary add on block is an additional contact point that can be mounted above the contactor. These exist individually. There are two types of contact points : normally open and normally close.

Auxiliary contact and Auxiliary add-on block both  contact working same but  very small difference. Auxiliary Contact  Manufacturers permanent mounted on Power contector we can't able to remove but Auxiliary add-on block is additional contact as per our system requirements we can easily add on contector if our required

Interlock:

An interlock is a device that connects two contactors together so that the two contactors work the same way.

Power Contect or Power contector

it's handal very large amount of current. Provide Motor supply 

Control contector or control contect

It's hendal very low amount of current for Motor control system such like on -off indication,Start -stop command,Star-Delta,FWD - RES.

Types of Contector

1) contector Coil supply types

- AC Contector (AC 230v,110v,some special type 24v Ac contector)

- D.C Contector(DC 24v, 110v)

- AC & DC Both supply

2) contact types

- NO contect

- NC content

- Power contect ( for Motor)

- Auxiliary Contect (for Motor control Such like On-off indication,start-stop,FWD-RES )

- Aditinol Auxiliary or Add on Block ( if requirement)

3) Basd On Circuit

- Power contector  

- Control Contector

IEC 60947 standard contector Types

This types We can easily show where we used which type of Contector

IEC 60947 considered two Major point .

1) current catagory 

2) different types Electrical Equipment

The current rating of the contactor depends on utilization category. Example IEC categories in standard 60947 are described as: