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Pushbutton switches are commonly used in electrical applications such as controlling a motor or a light. They come in different shapes and sizes and are designed to perform a specific electrical function. The purpose of this article is to explain the application field and working principle of pushbutton switches.

Pushbutton switches are typically used in industrial control, security alarm, and telecommunications. They can be designed either to be manually operated by a person, or to be activated automatically. In industrial control, they are usually employed to start and stop motors, activate solenoids, and provide indication of machine states. In the security alarm industry, they serve to control the signals of multiple sensors, among other functions. In telecommunications, they are used to activate a variety of operations from a single switch, such as making a phone call.

To understand the working principle of pushbutton switches, it is essential to have a basic understanding of how electricity works and what is an electric circuit. An electric circuit consists of a load, an electrical energy source, and a series of conductors connecting the load and source. The load and the source need to be connected to each other in order for electricity to flow from one to the other. When a pushbutton switch is pressed, a signal is sent to the source causing electricity to flow through the circuit.

Pushbutton switches work on the principle of contact-making and contact-breaking. When the switch is pressed, a contact blade is pressed against a contact point, creating a closed circuit. The current then flows through the circuit and powers the load. When the switch is released, the blade breaks contact with the contact point, and the circuit is opened, preventing the flow of current.

The most common type of pushbutton switch is the momentary pushbutton switch, which turns an electrical circuit on or off when it is pressed and held for a specific amount of time. These switches are typically found in industrial control applications, such as controlling a motor, or in security alarm systems.

The other common type of pushbutton switch is the maintained pushbutton switch. This type of switch is used to turn on an electrical circuit and keep it on until the switch is released. This type of switch is used in applications where the user needs to maintain control of the electrical circuit for a lengthy period of time, such as in telecommunications.

Pushbutton switches can be either normally open (NO) or normally closed (NC). In a normally open switch, electricity can only flow through the circuit when the switch is pressed. In a normally closed switch, electricity can only flow through the circuit when the switch is not pressed.

In conclusion, pushbutton switches are used in a variety of different applications, from industrial control to telecommunications. They work on the principle of contact-making and contact-breaking, and can be either momentary or maintained. They can also be either normally open or normally closed. By understanding their applications and working principles, it is possible to choose the right switch for any given application.

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