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
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