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:
Power supply with scalability optimised
Schneider Electric South Africa
Electrical Power & Protection
Schneider Electric has introduced the Easy UPS 3-Phase Modular to the South African marketplace. This robust uninterruptible power supply (UPS) is designed to protect critical loads while offering third-party verified Live Swap functionality.
Read more...
Prioritising arc flash safety
Comtest
Electrical Power & Protection
Comtest has developed a range of thermal imaging and wireless testing tools from Fluke, designed to ensure safety is the top priority for engineers working in potentially dangerous arc flash zones.
Read more...
Hot Dip Galvanizers Association shines new light on renewable energy
Electrical Power & Protection
The Hot Dip Galvanizers Association of Southern Africa plays an important role in supporting the energy value chain – which spans clean, renewable and green energy – as it powers towards key sustainability targets.
Read more...
ACTOM supplies high-voltage equipment to wind farm project
ACTOM Electrical Machines
Electrical Power & Protection
ACTOM High Voltage Equipment is currently in the process of manufacturing 400 kV and 132 kV high-voltage primary equipment for the Ummbila Emoyeni wind farm project in Mpumalanga.
Read more...
Energy measurement module for BL20 I/O System
Turck Banner Southern Africa
Electrical Power & Protection
Turck’s BL20 energy measurement module enables precise monitoring of the energy consumption of single- or three-phase systems.
Read more...
Distributed energy resource management systems: a grid symphony
Schneider Electric South Africa
Electrical Power & Protection
To listen to a symphony is one of the world’s great gifts. A conductor must ensure that instruments play beautifully as a whole and are kind to the ear and uplifting to the spirit yet shine in their individuality. The same can be said of a DERMS, which must effectively manage diverse energy sources to avoid compromising the grid’s integrity.
Read more...
Focus on energy sector infrastructure development can drive economic growth
Electrical Power & Protection
Post-election periods in South Africa often see a renewed focus on infrastructure development, with a specific emphasis on directing investments towards the energy sector. This strategic approach aims to accelerate economic growth, address energy challenges, and ultimately uplift the overall standard of living for the populace.
Read more...
Turning the continent into a global leader for green fuel
Electrical Power & Protection
Africa is at a turning point, with the potential to shift from being a supplier of raw materials to becoming a leader in advanced manufacturing, particularly in the growing green hydrogen market. For this transformation to happen, African countries must work together, combining their resources and talents to build a strong local economy.
Read more...
Epiroc showcases battery-electric drill rig at MINExpo 2024
Electrical Power & Protection
Epiroc recently showcased a demonstrator of the first ever Down-The-Hole SmartROC D65 battery-electric drill rig at the MINExpo exhibition in Las Vegas.
Read more...
Smart metering for utility management and sustainability
Electrical Power & Protection
Theodore Paraskevakos, a Greek-American inventor and businessman, developed the first smart meters in 1972 while collaborating with Boeing. Since then, smart meters have evolved significantly.
Read more...
printer friendly version