The electronic contactor is a device that works with electrical networks by power supply or batteries. This component can stop or open circuits with or without load and when current flows are involved that could cause harm to people in actions such as opening and closing installations with motors. Electrical switching mechanisms called contactors are comparable (in function) to relays. They are used in all sorts of applications involving mobile equipment because they handle various levels of current. In this sense, it differs from conventional relays in that it handles significantly higher electrical levels or flows. In order for the contacts to move to the closed position and thus complete the entire circuit, the electronic contactor needs a certain voltage to be applied to the coil. This is what makes it possible for the connections to reopen and terminate the circuit when power is removed from the circuit. Thanks to its large contact surface (which is larger than that of a relay) and high pressure (also higher), the contactor can withstand all of the higher inrush currents that are quite frequently observed on almost all mobile equipment. So far everything very well explained, but what is an electronic contactor for? Well this is a decisive component of the automation of all kinds of electric motors. Their precise and efficient operation is crucial to establishing reliable automation operations. In many devices, electric motors are directly connected to certain drives, which are usually cyclical. Why is this component so important? In motor automation, large electrical currents are often used to make them start and stop. It is in these two phases that the various types of contactors come into play. When a motor is activated with operations from places far from the motor to guarantee the safety of workers at all times (in industrial machinery, for example), it is the contactor that guarantees the intricate procedures from various strategic maneuvering points. In addition, they save a lot of time and are vital in industrial or commercial safety by preventing the machine from starting up before the appropriate measures have been taken, thus facilitating the distribution of stop stations. emergency. There are several types of contactors: 1.- Electromagnetic contactor: this type is activated by the force of attraction produced by its magnet when receiving electric current. They stand out for their low and easy maintenance, their practical and easy design and their resistance. They can execute connection and disconnection automatically or not automatically as well and between the power supply and the load. They are the most widely used contactors in electrical control systems of an industrial nature. They are mainly used in automatic lighting systems, batteries for condensers, public or programmed lighting systems, starting and controlling electric motors of all kinds and energizing resistive loads. 2.- Electromechanical contactor: this type of device has the peculiarity of its low mechanical inertia and rapid response capacity. Likewise, they can work with currents up to 12 times higher than their rated current. This makes them essential in the automation of many circuits or systems. Actually, they can protect motors from overloads, overvoltages and reverse currents when used in conjunction with some relays. 3.- Pneumatic contactor: this type of contactor is made up of both electrical parts and pneumatic components. It also has a connection chamber and a single-acting cylinder. Since they work through air pressure, they are called tires. 4.- Hydraulic contactor: this type of contactor works by hydraulic pressure. This means that the pressure is generated by a liquid. In most engines it is oil. or the oil. Within the almost infinite range of motors that exist, contactors vary in model, size and other technical characteristics. One type or another is chosen depending on the machine or equipment, the type of engine, its strength and power and the tasks it performs.
The coil of a contactor is an element that is essential for it to work. When it is connected to a voltage or electricity that touches each of its terminals, it is the moment in which the contactor organ can be remotely activated. The contactor coil is made up of enameled wire that has been wound on a tiny spool of insulating material in many turns, many worse than its small diameter. The coil is also known as an inductor and serves as the passive component of the entire electrical circuit. Actually, its main function is to store energy by induction and subsequently transform it into a magnetic field. The copper wire of the coil is very characteristic and is what differentiates it from other elements of the contactor. If a coil fails due to a lot of use and the passage of time it is impossible to activate the motor and it turns on when it receives the order by means of buttons, remote controls or another mechanism. Similarly, if the coil is worn or a single tiny copper wire is damaged then the motor may show insufficient acceleration or a noticeable loss of power. As the coil cannot be seen with the naked eye, but the motor must be uncovered and the contactor seen, many teams have mechanisms to show that there are faults in it. Typically, the engine control unit or device activates limp mode. Of course, each coil of each motor is different and has its own characteristics, but these elements are common to all inductors:
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