An Isolated Air Terminal Mast is a freestanding lightning protection mast that intercepts lightning strikes while maintaining a separation distance from the protected structure to reduce the risk of side flashes.
An Isolated Air Terminal Mast provides lightning interception without making direct electrical contact with the building or equipment it protects. It is commonly installed near sensitive equipment such as rooftop HVAC systems, communication antennas, solar PV arrays, and storage tanks. The mast is connected to the lightning protection system through dedicated down conductors and grounding electrodes.
Maintaining the required separation distance helps minimize flashover to nearby conductive components.
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