Langsung ke konten utama

Simple explanation about Contactor

A contactor is an electromechanical device used to switch an electrical circuit on or off. It's commonly used in control circuits for motors, lighting, heating, and other electrical loads. Contactors use an electromagnetic coil to control the opening and closing of electrical contacts to manage the flow of electricity in a circuit.

A contactor typically consists of several key components:

1. Coil: The coil is an electromagnet that, when energized, generates a magnetic field to pull in the contacts, closing the circuit. Contact of coil in the contactor named A1 and A2

2. Contacts: These are the points where the electrical circuit is either connected or disconnected. Contacts can be made of various materials, like silver, and are designed to handle specific voltage and current ratings. Normlly close (NC) and Normally Open (NO)

3. Enclosure: This is the housing that protects the internal components of the contactor, shielding them from environmental factors and ensuring safety.

4. Auxiliary Contacts: Some contactors have additional contacts for control signaling or interlocking purposes, separate from the primary contacts that handle the main electrical load.

5. Mechanical Latching System: In some cases, a mechanical latching system is used to maintain the contactor's state (open or closed) even after the coil is de-energized, until intentionally reset.

These components work together to allow the contactor to control the flow of electricity in a circuit.

Contactors are commonly found in various electrical systems and applications, including:

1. Industrial Machinery: They're used in manufacturing equipment, conveyors, pumps, and other heavy-duty machines to control the power supply.

2.  HVAC Systems: Heating, Ventilation, and Air Conditioning (HVAC) systems often use contactors to manage the power supply to components like compressors and motors.

3. Electrical Panels: Contactors are integral components of electrical control panels, where they control the power supply to different circuits or equipment.

4.  Elevators and Escalators: These systems often use contactors to control the motors that move the lifts or escalators.

5. Automotive Industry: In electric vehicles and hybrid vehicles, contactors are used in the control systems for various components like battery packs, motors, and charging systems.

6.  Residential and Commercial Buildings: They might be found in large-scale lighting systems, heating elements, or other power-consuming appliances.

Contactors are employed wherever there's a need to control the electrical power supply to heavy machinery or equipment, especially where frequent switching or controlling high power loads is necessary.

READ THIS 

CONTACTO USED IN INDUSTRIAL


Label:

Komentar

Posting Komentar

Postingan populer dari blog ini

Modern Electron Theory

     Modern research has ebtablished that all matter whether solid, liquid, or gaseous, consists of minute particles called molecules which are them selves made up of still minute particles known as atoms. Those substances whose molecules consist of similar atoms  are known as elements (as shown in figure 1) Figure 1 (  http://gb.scientificgems.wordpress.com/) and those whose molecules consist of dissimilar atoms are called compounds (as shown in figure 2).  Figure 2 (https://prodiipa.wordpress.com/) An atom is taken to consist of the following:  1).  It has a hard central core known as nucleus. It contains two types of particlesor; one is known as proton and carries positive charge, the other is neutron (discovered by Chadwick in 1932), which is electrically neutral i.e. it carries no charge though it is as haevy as proton. The protons and neutrons are very closely held together with tremendous forces.  2). Revolving round the relatively massive nucleus, in more or
Posting Komentar
Baca selengkapnya

Effect of Temperature on Resistance and Temperature-Coefficient of Resistance

Effect of Temperature on Resistance     we have explain erlier (Law of Resistance) that resistance of the conductor dipending on temprature. so that, here we will show you the effect of rise in temperature:     1) to increase the resistance of pure metal. The increase is large and fairy regular for normal ranges of temperature. The temperature/resistance graph is a straght line (figure 1).     2) to increase the resisrance of alloys, though, in their case, the increase is relatively small and irregular. for some high-resistance alloys like eureka (60% Cu and 40% Ni) and manganin, the increase in resistance is negligible ove a considerable range of temperature.    3) to decrease the resistance of electrolytes, insulators (such as paper, rubber, glass, mica, etc.) and partial conductors such as carbon. hence, insulators are said to prossess a negative temperature-coefisient of resistance. figure 1 ( The temperature/resistance graph) Temperature-Coefficient of Resistance
Posting Komentar
Baca selengkapnya

Value of α (alpha) at Different Temperatures

So far we did not make any distinction between values of α ( alpha)   at different temperatures. But it is found that value of  α ( alpha)  itself is not cönstant, but depends on the initial temperature on which the increment in resistance is based. When the increment is based on the resistance measured at 0 0 C, then α has the value of  α 0   ( alpha nol)  any other initial temperature t 0 C, value of α is α t , and so on. It should be remembered that, for any conductor, α 0 has the maximum value.  Suppose a conductor of resistance R 0   at 0 0 C (point A in Fig. above)  is heated to t o C (point B).  Its resistance R t  after heating is given by  R t   = R 0  (1 +  α 0   t)                                                     … eq (1) where   α 0  is the temperature-coeffcient at 0 0 C. Now, suppose that we have a conductor of resistance  R t  at temperature t 0 C. Let this conductor be cooled from t o C to 0 0 . Obviously, now the initial point is B and the final point is A. The fi
Posting Komentar
Baca selengkapnya