A shutter in switchgear refers to a device designed to enhance safety by providing a barrier within an electric switchgear panel. Here's how it works:
Function and Structure of the Shutter Device
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Base and Placement: The shutter device includes a base that is positioned on a bearing surface inside the switchgear panel. This base is designed to support a current switching device, which can move between two positions:
- Connected Position: The switching device is electrically connected to the associated electrical circuit.
- Disconnected Position: The switching device is electrically separated from the electrical circuit.
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Frame and Aperture: The device also has a frame with at least a portion that rises transversally from the base, creating a through aperture.
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Movable Shutter: The shutter is movable and is associated with both the base and the frame.
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Actuating Mechanism: This mechanism is used to move the shutter between two positions:
- First Position: The shutter closes at least partially the through aperture, thereby providing a barrier that enhances safety by preventing accidental contact with live electrical parts.
- Second Position: The shutter is retracted, leaving the through aperture at least partially open, allowing the switching device to be accessed or removed as needed.
Benefits and Applications
- Safety: The primary benefit of the shutter device is to ensure safety by covering live parts when the switching device is in the disconnected position, thereby preventing accidental contact.
- Maintenance and Inspection: It allows safe maintenance and inspection by providing a physical barrier when the system is not fully engaged.
In summary, a shutter in switchgear is a safety feature that moves to cover or uncover a through aperture within the switchgear panel, depending on whether the current switching device is connected or disconnected. This mechanism helps in preventing accidental contact with live components and enhances the safety and efficiency of the electrical system.