Sigma A-XT gas extinguishing panels from life safety control systems manufacturer Kentec are at the heart of a new fire safety solution protecting users of the Hong Kong-Zhuhai-Macau Bridge (HZMB). The HZMB is a 55 km-long bridge-tunnel system consisting of three cable-stayed bridges, an undersea tunnel and four artificial islands. It spans the Lingding and Jiuzhou channels, connecting Hong Kong, Macau and Zhuhai: three major cities on the Pearl River Delta. The HZMB includes a 41.6 km bridge from Zhuhai-Macau Port to Hong Kong’s port, making it the largest sea crossing in the world.
Shanghai Construction China installed Kentec’s extinguishing system, working with solution provider Guangzhou Wanzhen Information Technology Co. Ltd on behalf of the Macau Government. The team specified a suite of Sigma A-XT extinguishing panels, as well as supporting status units, and abort and disablement switches. The panels are based in the vast entry and exit port buildings.
A spokesperson for Guangzhou Wanzhen Information Technology Co. Ltd stated: “We work with Kentec extensively and know the systems they manufacture perform to an excellent standard. For this reason, we’re happy to recommend Kentec products to our customers.”
The Sigma A-XT releasing panel provides three initiation circuits as standard, meaning that the release can be configured to activate from any combination of detection zone inputs to allow specific and controlled activations.
Kevin Swann, managing director of Kentec, commented: “The configuration options of the Sigma A-XT allow the functionality of the system to be extensively modified to suit complex and large installations such as this prestigious project. With all the electronics mounted on a single, easily removable steel plate, the panels are both robust and easy to install.”
Another feature is the large LED display, simplifying configuration and displaying the time remaining until release for added end user safety. The countdown timer can be duplicated on up to seven status units per panel to provide localised indication of system status. Any number of abort and disablement switches can connect to the abort terminal of the releasing panel.
The HZMB cost 127 billion yuan (£14.9 billion) to build and was designed to last for 120 years. The structure was completed in February last year and opened to the public on 24 October following an opening ceremony attended by Xi Jinping, General Secretary of the Communist Party of China.
The Sigma A-XT has been approved to UL864 and is FM-listed. End users willl be keen to learn that EN-approved versions are also available.