Everything to Know About Magnetic and Electric Contactor

The basic means of controlling electrical circuits have been the same no matter how much the technology has improved over years. Amongst them are the electric contactors, and this article talk about various types of contactors and the way they work. It let you know about the differences between contactor and relay, AC contactor and DC contactor.

A Contactor

A contactor is an electromechanical switch whose major function is making or breaking the connection between the power supply and the load. The contactor is controlled electrically and compared to the switched circuit it is usually powered at a much lower level.

Controlling electric motors, lighting, thermal evaporators, capacitor banks, heating, and other electrical loads are included under a contractor’s applications. Electric contactor ranges in size and capacity. You have the one that you can easily lift with your hand to massive ones measuring about a meter on the side.

Magnetic Contactor

It is the most advanced of them and is the latest contactor design. In industrial applications, it is commonly used due to its features like

• In opening and closing a circuit uses the least amount of control current.
• It works automatically
• The contactor working, in a nutshell
• Provides the safest operation

From the external control circuit, current passes through the contactor and then excites the electromagnetic core. In turn, a magnetic field is created by the coil/electromagnet which helps the contactor in moving the armature. Between the fixed and moving contacts, a normally closed contact then makes the circuit complete. Through these contacts to the load, the current is then able to pass.

When there is the removal of current, the coil becomes de-energized, and the magnetic force falls to zero. The spring force is very higher and then it pulls back the armature opening the circuit.

Conclusion

In the control of a circuit, contractors are indispensable devices and come with added safety features. With every electrical device, it is necessary to make sure that you find one that matches your needs and function. You also require a reliable fuji magnetic contactor supplier which gives you genuine products meeting global standards like IEC. Follow us on Twitter

Details Regarding Contactor-Its Construction, Types and Applications

A contactor is the major part in an electrical circuit. It can stand on its own power control device or a part of a starter. Electric contactors are mainly utilized to connect and break power supply lines that runs through power lines or it repeatedly establish and interrupt electrical power circuits. You will find its use in light loads, complex machine control. Between the control circuit and power circuit it is frequently considered as an intersection point as it is controlled by the control circuit. It even controls the circuit between powers and loads.

Contactors are switching devices that are electrically controlled and are used for switching electrically. The basic operation of this is quite similar to a relay. Short circuit or overload protection cannot be provided by them but they can break the contact when coil excites.

Construction of a Contactor

The electric contactor mainly constitute of two iron cores, where one is fixed and the other one is the movable coil and is an insulated copper coil. Here on the fixed core the copper coil is present. For power connection there are six main contacts. In this three are fixed cores and the other three are movable cores. From pure copper these contacts are made, and to withstand high starting current and temperature the contact points are made from special alloy. Auxiliary contacts a spring which is located between coil and the movable core.

The three main parts are-

Enclosure

It acts like an insulator and protector, which from any electrical contact, dust; oil, etc protects the circuit. It is made from various materials like Bakelite, Thermo setting plastic, Nylon 6, etc.

Coil

It provides a force which is needed to close the contact. The coil is even referred as an electromagnet. To safeguard the coil and contactor an enclosure is used.

Contacts

The major function of Fuji magnetic contactor is that it passes the current to different parts of the circuit. They are then classified into power contacts, contact springs and auxiliary contacts. Here each of the contacts has its own functions, which in principle of operation of the contactor is properly explained. Follow us on Twitter