Amid growing concerns about its environmental impact, utilities worldwide are seeking to eliminate sulphur hexafluoride gas from their switchgear.
When it comes to electric power systems, switchgear is essential for safety as it allows for the regulation, protection and isolation of power systems. Gas insulated switchgear – most commonly with sulphur hexafluoride (SF6) – was previously a popular choice for power distribution systems because it effectively manages the flow of high voltage electricity.
However, following the EU’s proposal of the Green deal: phasing down fluorinated greenhouse gases and ozone depleting substances in 2022, SF6 was acknowledged as one of the most potent greenhouse gases and it was recommended that SF6 be phased out in all new switchgear by 2031.
Some utilities have already started replacing their fleets of SF6 insulated sectionalisers and load break switches with modern switchgear that uses solid dielectric insulation instead of gas.
A local product for local demand
With the detrimental effect of SF6 on the environment now so widely understood, many utilities are seeking to implement more sustainable practices, and demand for SF6 gas-free switchgear continues to rise.
on a powerline. Image: NOJA Power.
Australian manufacturer NOJA Power is one of the world’s largest manufacturers of reclosers and has announced an increased manufacturing capacity at its Brisbane headquarters, making it easier and faster for Australian companies to make the transition to sustainable alternatives.
NOJA Power’s Group Managing Director, Neil O’Sullivan, said, “We are pleased to see the NOJA Power VISI-SWITCH® now rolling off the production line as it is the perfect solution to eliminate the use of the SF6 gas switches in our customers networks and help them take further steps to achieve their net carbon zero targets.”
Game-changing innovation
The company’s solid dielectric insulated load break switch, the NOJA Power VISI-SWITCH, has zero SF6 gas insulation and is the first of its kind with visible isolation.
NOJA Power has developed expertise in solid dielectric insulation through its OSM Recloser product, with more than 100,000 installations in 106 countries over the last 20 years.
The same technology has been applied to load break architecture to develop the VISI-SWITCH, enabling Australian utilities to implement a sustainable alternative to SF6 gas insulated switchgear.
The VISI-SWITCH consists of an enclosed air-break isolator and vacuum interrupter in series and is operated by a mechanical sequencing mechanism. The vacuum interrupter in this design is responsible for all electrical makes and breaks, while the isolator provides all the necessary BIL to meet standards for a point of isolation.
NOJA Power’s VISI-SWITCH features an innovative viewing window inside the insulator bushing that allows operators to visibly confirm the point of isolation prior to linework, enhancing safety and providing peace of mind.
With its increased manufacturing capacity and innovative solid dielectric insulated load break switch, NOJA Power and its VISI-SWITCH is set to play a pivotal role in the shift away from SF6 gas insulated switchgear.
To learn more, visit nojapower.com.au or call 07 3907 8777.
Featured image: Utilities have started replacing SF6 insulated sectionalisers. Image credit: NOJA Power.
