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Snap Action, Limit Switches

Snap action, limit switches are electrical switches used in a wide range of applications. These switches can be used to control and shut off power when something unexpected happens, such as an overload or a short circuit. They are also used in electronic appliances and home automation systems.

Application Field

Snap action limit switches can be used in virtually any application that requires precise control of power. These switches are commonly found in circuit breakers, motor protection devices, and other related equipment. They are also used in safety systems such as those found in elevators and machines in manufacturing plants. Additionally, these types of switches may be used to control lighting, or even for security or home automation.

Working Principle

Snap action switches work by using an actuator which can be manually operated or electronically operated. When the actuator is activated, it will cause a mechanical contact, usually a plunger, on the switch to open or close. When the contact is opened or closed, the electrical current will be shut off or turned on. The amount of electricity that passes through the switch is determined by the size of the contact, the material used in the contact, and the amount of power applied to the contact.

Snap action switches are designed to operate with very precise movements, and can be adjusted to operate within a very specific range. For example, in a motor protection device, a snap action switch may be used to turn off the power to the specific motor that reaches a certain temperature threshold. In this application, the switch must be able to detect the exact temperature at which the motor needs to be shut off, and then shut off the power.

Advantages

Snap action switches are designed to make very precise and reliable movements, which makes them ideal for applications where a precise sequence of events must occur. These switches require very little maintenance, as they do not require any lubricants or constant adjustment. They are also highly reliable and durable, since they are designed to operate reliably in a variety of environments, including extreme heat and cold. Finally, they are relatively inexpensive compared to other types of switches.

Disadvantages

One disadvantage of snap action switches is that they require a certain amount of force to operate, so they may not be suitable for very delicate applications. Additionally, they are not suitable for high-frequency applications, as the contacts may overheat and become damaged over time. Finally, these switches are not well suited for applications that require extremely precise movements, as the plunger must move within a relatively small range.

Conclusion

Snap action switches are perfect for applications requiring precise control of power with minimal maintenance. They are reliable, durable, and relatively inexpensive compared to other types of switches. However, they may not be suitable for very delicate applications, as they require a certain amount of pressure to operate. Additionally, they are not suitable for applications requiring very precise movements or high frequency applications, as the contacts can become damaged over time.

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