Protection from arcing faults
August 2013
Electrical Power & Protection
DEHN’s arcing fault protection system has been developed to protect against the effects of an arcing fault during live work on electrical installations. It detects an arcing fault and causes a three-phase short-circuit which makes the current flow from the arcing fault to the three-phase KSP short-circuiting cartridge. This considerably reduces the effects of the arcing fault with regard to thermal exposure energy, electromagnetic radiation, pressure and acoustic wave, and occurrence of hot, toxic gases and metal vapours. The DEHNarc, in combination with the installer’s personal protective equipment for working under live conditions, ensures efficient protection against arcing faults.
The efficiency of the protection system depends on the limitation of the incident energy of the arc. The extremely short disconnection times significantly reduce the fatal consequences of an arc fault. To this end, it is essential that the arc fault current is quickly conducted to a short-circuited parallel branch, the short-circuiter. The effective interaction between the arc detection system and short-circuiter ensures that the arc fault is extinguished after some milliseconds before the overcurrent protective device is tripped. The arc duration is significantly reduced, considerably reducing the arc energy. As a result, persons are protected from the effects of an arc fault and the availability of the installation is increased.
For more information contact Johan van Staden, Surgetek, +27 (0)11 792 1303, [email protected], www.surgetek.co.za
Further reading:
Navigating solar energy adoption
Electrical Power & Protection
Although South Africa’s enhanced solar tax rebate has ended, solar and energy storage solutions remain accessible and achievable. By taking a proactive and strategic approach, businesses can successfully lower their operational costs, mitigate power outages, and secure long-term energy independence.
Read more...
As wind energy gains momentum, lack of grid infrastructure remains a bottleneck
Electrical Power & Protection
Interest in wind energy has gained significant momentum in South Africa, opening up new opportunities for investment. However, lack of grid infrastructure could prove to be a stumbling block in unlocking this potential.
Read more...
Portable appliance tester
Vepac Electronics
Electrical Power & Protection
The new appliance tester from Vepac is the ideal tool for testing the safety of electrical appliances in accordance with DGUV regulation 3 and BetrSichV. It enables the precise measurement of protective conductor or touch current using the equivalent leakage current method.
Read more...
Is sustainability enough any more?
Electrical Power & Protection
With the planet’s resources stretched to the brink and no signs of improvement, it is time we look beyond sustainability and explore regenerative thinking and design.
Read more...
A simple guide to understanding the importance of IP ratings
Electrical Power & Protection
When selecting electrical products for industrial, commercial or even domestic use, it is crucial to consider how well they can withstand environmental factors like dust and water. This is where ingress protection (IP) ratings come into play.
Read more...
A milestone in electrical safety
ABB South Africa
Electrical Power & Protection
Celebrating a milestone in electrical safety, ABB proudly marks the 100-year anniversary of its revolutionary Miniature Circuit Breaker.
Read more...
The power of water
Editor's Choice Electrical Power & Protection
The Alpenglow Hy4 is the world’s first water-based hydrogen combustion engine, offering a convincing alternative to traditional battery-electric vehicles and established hydrogen fuel cell designs.
Read more...
Optimising purification for green hydrogen production
Parker Hannifin - Sales Company South Africa
Editor's Choice Electrical Power & Protection
Parker Hannifin delivers advanced purification and thermal management components that enhance green hydrogen production.
Read more...
A new chapter in geothermal engineering
Editor's Choice Electrical Power & Protection
The town of Geretsried in southern Germany has become a focal point in the global shift toward renewable energy. While the world’s attention often turns to wind turbines and solar panels, a quieter but no less powerful force is at work deep beneath the surface, geothermal energy.
Read more...
Harnessing the ocean with wave energy
Editor's Choice Electrical Power & Protection
Wave energy is emerging as one of the most promising yet underutilised renewable sources. Tapping into the rhythmic, predictable power of ocean waves, this technology offers a clean, reliable alternative to fossil fuels and a valuable complement to wind and solar energy.
Read more...
printer friendly version