Metal Clad Switchgear Power Systems

Metal Clad Switchgear Power Systems

Metal-clad switchgear power systems are most commonly used in medium voltage applications.  All the sections are earthed separately and energy sustanibility is maintained by way of independent sections. Metal-clad switchgear power systems differ from metal-enclosed in the following ways:

Metal-Clad Cubicle

• The main switching and interrupting device is out of the removable type arranged with a mechanism for moving it physically between connected and disconnected positions. It is also equipped with self-aligning and self-coupling primary disconnecting devices and control wiring connections capable of being disconnected.
• ,Major parts of the primary circuit (i.e. circuit switching, interrupting devices, etc.) are completely enclosed by grounded metal barriers that have no intentional openings between compartments.
• All live parts are enclosed within grounded metal compartments.
• Automatic shutters cover primary circuit elements when the removable element is in the disconnected, test, or removed position.
• Primary bus conductors and connections are covered with insulating material throughout.
• Mechanical or electrical interlocks are provided for proper operating sequence under normal operating conditions.
• The door through which the circuit-interrupting device is inserted into the housing may serve as an instrument or relay panel and may also provide access to a secondary or control compartment within the housing.
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