What is the working principle of a contactor?

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.

What is Pdf995?

Pdf995 makes it easy and affordable to create professional-quality documents in the popular PDF file format. Its easy-to-use interface helps you to create PDF files by simply selecting the “print” command from any application, creating documents which can be viewed on any computer with a PDF viewer.

Why contactors are used?

Why are Contactors Used? Contactors are used for high power applications. They allow a lower voltage and current to switch a much higher power circuit, so they are generally larger and more heavy-duty than control relays, enabling them to switch higher power loads on and off for many thousands of cycles (Figure 1).

What is difference between contactor and relay?

Contactor: It is a device which is used for repeatedly establishing and interrupting an electric circuit under normal conditions. Control Relay is more commonly used in control circuits which are single phase circuits. Contactors are typically built for switching 3-phase load.

How do I install pdf995?

Install Pdf995 from the console as a main printer to the default installation folder (program files)….How can I set up PDF995 as a shared network printer?

1. Install Pdf95 Version 8.3 or later and the free converter on the server.
2. Share the c:\program files\pdf995 folder as “pdf995”.
3. Share a pdfdata folder on the server.

How do I install PDF995?

Installing the PDF995 Editor

1. Click [Save] and save to your preferred location (E.G. Desktop, My Documents etc)
2. Go to this location and Double Left Click the file “pdfedit.exe” The file will install automatically and bring up a readme file giving help on PDF995 and its use.

How do you merge PDF files together?

Select the PDF files you want to combine using the Acrobat PDF merger tool. Reorder the files if needed. Click Merge files. Sign in to download or share the merged file.

What are contactor components?

A contactor has three components. The contacts are the current-carrying part of the contactor. This includes power contacts, auxiliary contacts, and contact springs. The electromagnet (or “coil”) provides the driving force to close the contacts. The enclosure is a frame housing the contacts and the electromagnet.

What are the three parts of a contactor?

A contactor has three components. The contacts are the current-carrying part of the contactor. This includes power contacts, auxiliary contacts, and contact springs. The electromagnet (or “coil”) provides the driving force to close the contacts.

What is the operating principle of a contactor?

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.

How are the contact tips on a contactor made?

And three moving contact tips are mounted with the contactor’s iron core and they move along with the iron core. Contact tips are made of natural copper with a smooth surface to ensure accurate contact between fixed and moving tips. And the contact points are coated with silver alloy to withstand excessive arcing temperature.

How is an electromagnetic field generated in a contactor?

Where each of the contacts has its own functions, which is explained in principle of operation of the contactor. An electromagnetic field is generated whenever current flows where the moving coils attract each other. A large amount of current is drawn initially by an electromagnetic coil.

What happens when a contactor is de-energized?

On de-energizing, the contactor coil gravity or spring moves back the electro-magnetic coil to its initial position and there is no flow of current in the circuit. If contactors are energized with AC current, a small portion of the coil is the shaded coil, where the magnetic flux in the core is slightly delayed.