1503 Isolation Switch

Physical Structure and Mounting

• Compact Design: It has a relatively compact and space-efficient design, allowing for easy installation in various electrical panels or enclosures without occupying excessive space. This makes it suitable for use in different industrial and commercial applications where space is often at a premium.

• Mounting Options: The switch offers multiple mounting options, such as clip-on or bolt-on fuse versions. It can be mounted into new or existing structures or enclosures, providing flexibility during installation. This enables it to be integrated seamlessly into different electrical systems, whether they are being newly constructed or undergoing upgrades.

Electrical Connections and Interlocking

• Fuse Clips: The 1503 Isolation Switch provides line and load fuse clips, which play a crucial role in protecting the circuit from overcurrent situations. These clips ensure a secure connection for the fuses, allowing for easy replacement when necessary.

• Interlocking Mechanism: When used with the Allen-Bradley® handle module and contactor, the switch has an interlocking feature that provides both electrical and mechanical interlocks. This interlocking mechanism ensures safe and proper operation by preventing incorrect sequencing of operations and protecting against accidental energization or de-energization of the circuit.

Shutter Mechanism and Isolation Function

• Shutter Mechanism: It includes a shutter mechanism that effectively isolates the power cell from the medium voltage when the switch is in the off position. This shutter provides an additional layer of safety by preventing accidental contact with live parts and minimizing the risk of electrical shock or short circuits.

• Isolation of Power Cell: The primary function of the 1503 Isolation Switch is to isolate the power cell. When the isolation switch handle is moved to the off position, it cuts off the electrical connection to the power cell, ensuring that the downstream equipment or circuits are completely de-energized. This isolation is essential for maintenance, repair, or testing purposes, as it allows technicians to work on the equipment safely.