| 摘要 |
An elevated light apparatus for an airport runway light system comprises a mast mounted to a base plate, which is attached to a base-cup. The mast can be designed with a hollow configuration to allow internal electrical connection between a light source in a light assembly and an isolation transformer in the base-cup. The mast can include a frangible break joint that cleanly separates the mast from the base plate. A safety power cut-off switch can be fixed into the base plate on the base-cup. The power cut-off switch can be positioned in the frangible break joint so that a switch button can be held closed by a breakaway portion of the frangible break joint. In the event of mast breakage, the switch button can be released to open electrical circuits for quick disconnection of the electrical connection.
|
