Sydney Metro

The Sydney Metro Northwest comprises the first phase of eight train stations and 36 kilometres of track between Chatswood and Rouse Hill, via its twin 15 km tunnels between Bella Vista and Epping, making them the longest rail tunnels ever built in Australia.

The works include the commissioning of the axial fans for the Tunnel Ventilation System (TVS) as well as the Track Exhaust System (TES). The fans delivered for this project were designed to operate during a fire, withstanding up to 300°C for 2 hours; they are also equipped with anti-blocking rings to protect the fans from train-induced electromagnetic disturbances and allow safe operation while maintaining high efficiency, with lower energy consumption.

SOLUTION PROPOSED BY THE DEVALLE ENGINEERING TEAM

After evaluating the most suitable design for the project (metro) and after studying the requirements for the project, as well as the location of the installation of the enclosures, the Geo Series easily removable junction boxes in AISI 304L stainless steel with IP66 dust and water tightness were determined as the ideal enclosures for the connection of lighting and other electrical systems.

In addition, Glakor^® nickel-plated brass EMC IP68 metric threaded cable glands were included in the development of the project for installation and subsequent assembly, allowing electronic devices not to interfere with each other, as well as being suitable for the passage, compression and clamping of cables between two compartments under the Sydney Underground.

Also as an important part of the underground tunnels, PH120 fire resistant junction boxes were included, ready to remain operational and meet fire safety specifications for more than 2 hours.