lülitusviisid

Lülitusviisid refers to the different methods or modes by which an electrical switch or circuit can operate. These modes determine how a circuit is opened or closed, and the type of connection established. Common lülitusviisid include normally open (NO), normally closed (NC), and changeover (CO) or single-pole double-throw (SPDT).

A normally open (NO) switch is in an open circuit state by default, meaning the electrical path is broken. When the switch is activated, the circuit is closed, allowing current to flow. This is often used for functions that are initiated by pressing a button, such as starting a motor or activating a light.

A normally closed (NC) switch is in a closed circuit state by default, allowing current to flow. When the switch is activated, the circuit is opened, interrupting the flow of electricity. This type of switch is commonly used for safety mechanisms or in situations where continuous operation is the default, such as in emergency stop buttons or in certain alarm systems.

A changeover (CO) or single-pole double-throw (SPDT) switch has a common terminal and two other terminals. It can connect the common terminal to one of the other two terminals, and typically has one position that is normally closed and another that is normally open. This allows for switching between two different circuits or changing the state of a single circuit from open to closed or vice-versa without breaking the connection. For example, it can be used to select between two different power sources or to control two different loads. Understanding these lülitusviisid is crucial for designing and troubleshooting electrical systems.