Sydney Cable Tunnel Network, Telstra Australia

Tunnel Lighting System

Telstra is Australia's largest telecommunications provider with infrastructure covering the entire continent. In the city of Sydney a major part of this infrastructure is provided underground below the streets of Australia's largest city. The Sydney Cable Tunnel Network covers tens of kilometres linking the city's telephone exchanges and provides the communications link between millions of businesses.

Around 70% of the tunnels is more than a century old. In order to keep everything in working order maintenance staff require safe access and guaranteed lighting to perform their duties. The tunnel network is lit with weatherproof T5 fluorescent fittings from Thorn Lighting. All fittings are driven by a TridonicAtco PCA Excel one4all DALI ballast and every 10th fitting includes a DALI Emergency Inverter.

Distributed Monitoring and Control

The lighting is monitored and controlled using distributed control boxes from Monitor Software. The control boxes contain TM2600-DALI Line Controllers to manage 500m of tunnel lighting. Every fitting is monitored for ballast status, lamp status and lamp hours. Emergency fittings are monitored for inverter status and battery charge level. Discharge tests and initiated and reported through the DALI CONTROL system.

Overall management of the lighting system takes place from an exchange building providing full operator control and integration with the tunnel zone alarm system. The TUNNEL MONITOR program displays a view of the tunnel system with control options for each zone. Status reports showing fitting location are provided to keep the system is full working order. 

The combination of DALI lighting, emergencies and DALI CONTROL Line Controllers provides the complete tunnel lighting system that is easy to install, commission and maintain.

For more information contact DALI Control.