A changeover switch is an electrical device used to switch between two or more power sources. It’s commonly used in situations where a backup power source is required, such as in emergency generators or solar systems.

Types of Changeover Switches:

Manual Changeover Switches: These switches require manual operation to switch between power sources. They are often used in simple applications where manual intervention is acceptable.
Automatic Changeover Switches: These switches automatically switch between power sources based on predefined conditions, such as power failure or voltage drop. They are used in applications where a reliable and uninterrupted power supply is critical.
Automatic Transfer Switches (ATS): These are specialized automatic changeover switches designed for critical applications like hospitals, data centers, and industrial facilities. They offer advanced features such as load shedding, voltage monitoring, and remote control.
Applications of Changeover Switches:

Emergency Generators: Switching between the main grid and a backup generator during power outages.
Solar Systems: Switching between the grid and a solar energy system.
Critical Facilities: Ensuring a reliable power supply for hospitals, data centers, and industrial plants.
Backup Power Systems: Providing a secondary power source in case of a primary power failure.
Key Features of Changeover Switches:

Switching Speed: The time it takes for the switch to transfer between power sources.
Contact Rating: The maximum current and voltage the switch can handle.
Control Options: Manual, automatic, or remote control.
Safety Features: Overload protection, short circuit protection, and grounding.
Compatibility: Compatibility with different types of power sources and loads.
Choosing the Right Changeover Switch:

When selecting a changeover switch, consider the following factors:

Application Requirements: Determine the specific needs of your application, such as switching speed, contact rating, and control options.
Power Source Compatibility: Ensure the switch is compatible with your primary and backup power sources.
Safety Standards: Choose a switch that complies with relevant safety standards and regulations.
Budget: Consider your budget and select a switch that offers the necessary features within your price range.