Contactor (Voltage Instruments). One of the switch series requires all manufacturers to use. Aims to ensure the safety of many electrical equipment. Although the device construction is quite small and simple. However; it is an indispensable industrial equipment. So! We will find out what a contactor is
What is a Contactor? What is boot from?
What is a Contactor? Structure and working principle of contactor
A contactor is an industrial device that switches off the device. In Vietnam we often call the contactor; In some areas it is called the magnetic boot. There are usually 1-phase - 2-phase - 3-phase and 4-phase startups but the most common use is 3-phase magnetic inrush current
The effect of starting from
What is the effect of magnetic starter? The principle and structure of how magnetic starter works
Actually; the use of the contactor is an ON - OFF switch for the input source of the electrical systems in the company, building, factory line…. In all the large electrical cabinets of the factory we can see the actuation from the contactor in it
What is a contactor?
What is contactor? Application - Structure and operating principle of contactor lines for industrial use
The main purpose of the contactor's application is to ensure the safety of equipment in the control and operation of the production line.
Contactor, although installed in area A, can control the switching of devices in area B far away from it. This is the dominant effect of the verb verb lines
Structure of contactor - Starting from
The design of the very compact contactor makes the installation in the electrical cabinet very flexible and saves the cabinet area. At the same time; The possibility of damage to this device requires replacement is not high.
And we can use the contactor currents operating in the electrical cabinet must be over 5 years
construction of magnetic starter contactors
What is the construction of magnetic starter contactor
Thanks to the perfection of 3 main accessories that connect together to create a complete contactor:
Magnetic field magnet: Designed by wrapping copper coils around a thick steel core. Integrated with a push compression spring to open and close
Arc processing circuit board: Used in eliminating arcs from appearing to prevent the heating of the arcs causing contact burns resulting in low device durability.
A contact system consists of the main contact and the auxiliary contact.
Working principle of contactor (Starting from)
The working principle of this automatic electronic meter works as follows: As long as you supply a suitable source to the contactor for it to work, the main contact of starting from the contactor will close. . Besides that; the integrated auxiliary contact on the contactor will also close. Basically, this child operates the same control as the intermediate relay
Working principle of contactor - Starting from
When the power supply is over, the main contact and the contactor auxiliary contact will return to the original normally open state
Of course; We have to preview on this starter device to see how many volts it uses DC or AC power and how many volts the power supply is.
The design contact in the contactor is very important. This is an integrated accessory to perform the task of switching the contactor's device. It consists of 2 contacts shown below
The contact is the original point. Of course here high current can pass through and we assume this is a type of normally open contact
The contactor's main contact current only closes when we apply a power supply to the contactor to stimulate it.
Unlike the main contact, the auxiliary contact attached to the contactor has 2 contacts: Normally closed and normally open. However; the permissible current through this contact is very small and by default should not exceed 5A
Main contact auxiliary contact contactor
The primary contact the contactor auxiliary contact in normally closed form normally opens when powered on
Additional note about normally closed and normally open contacts:
What is a normally closed contact
Normally closed contacts are contact types that have the ability to reconnect. We think of them as two river banks. There must be a bridge over to go
The same is true for closed contact lines. Intermediate bridge for transmission of electrical signals
What is a normally open contact
Is a form of open contact. That is, there is no connection between the two contacts and this is called the contact in the OFF state
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