Sigma A-XT gas extinguishing panels from Kentec, a life safety control systems manufacturer, are at the heart of a new fire safety solution protecting users of the magnificent Hong Kong-Zhuhai-Macau Bridge (HZMB).
The HZMB is a 55km-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 41.6km bridge from Zhuhai-Macau Port to Hong Kong’s port, making it the largest sea crossing in the world.
Recommending Kentec products
We are happy to recommend Kentec products to our customers"
Shanghai Construction China installed Kentec’s extinguishing system, working with solution providers 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 says the panels and accessories were chosen because of their renowned reliability: “We work with Kentec extensively and know the systems they manufacture perform to an excellent standard. For this reason, we are happy to recommend Kentec products to our customers.”
Robust build quality
The Sigma A-XT releasing panel provides three initiation circuits as standard, meaning the release can be configured to activate from any combination of detection zone inputs to allow specific, controlled activations.
With all the electronics mounted on a single removable steel plate, the panels are both robust and easy to install"
Kevin Swann, Managing Director of Kentec, says Sigma A-XT’s world-wide reputation is a result of its reliability, robust build quality and configuration capabilities: “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,” he explains. “And with all the electronics mounted on a single, easily removable steel plate, the panels are both robust and easy to install.”
Providing localized indication
Another feature is the large LED display, simplifying configuration and displaying the time remaining until release for added user safety. The countdown timer can be duplicated on up to seven status units per panel, to provide localized 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 2018 and open to the public on 24 October 2018 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. EN approved versions are also available.
