Gold Coast Airport (GCAPL) is a dynamic, growing business, which has experienced an average annual growth rate in passenger movements of 16 percent over the past five years.
With this expansion comes greater energy consumption to service the growth and the airports existing oil filled feeder recloser was beginning to show its age. While the recloser was upgradeable, parts were becoming more and more difficult to obtain and lockouts due to higher loads and faults meant a newer more flexible option was needed to improve reliability of supply.
According to GCAPL, recloser main concern was improving the current rating over the old unit but other features like automatically clearing transient faults and data logging and reporting were important considerations too. In fact, the unit it chose will service GCAPL past its current planned infrastructure upgrades, something it did not expect.
Located only minutes from the Gold Coast CBD and so close to the ocean, GCAPL management wanted a unit, which was both suitable to the local conditions and had a low environmental impact potential.
Using new generation solid dielectric vacuum interrupting technology, NOJA Power OSM Recloser achieved GCAPL of low environmental impact by eliminated the use of oil. The OSM tank and control cubicle are manufactured using stainless steel and the tank bushings are high pollution rated making the unit ideal for coastal applications.
To avoid disruption to the airport’s internal power network, the old recloser was removed and the new unit installed using live line techniques where the 11kV supply was maintained throughout the installation.
According to NOJA Power, the airport is a busy place and taking power off-line was never an option. Protection settings for the new recloser were designed and programmed beforehand to save time on site and the whole installation was completed in approximately 8 hours.
According to GCAPL, it was a complete package as NOJA Power manufactured and supplied the equipment, engineered the protection settings, coordinated the installation and provided training for its engineers. GCAPL satisfied with the result.