All-in-one multipole lightning current and surge arresters
July 2006
Electrical Power & Protection
Dehnventil TT provides the same level of protection where previously up to 12 devices had to be installed and connected.
Providing maximum system availability, Dehnventil TT devices are easily installed in different types of power supply systems, with no need for calculations. Their discharge capability meets protection level 1 in accordance with EN 61643-11, the highest requirements of lightning protection at present. The devices are capable of protecting equipment, even in the case of a lightning strike with an intensity of up to 100 kA (10/350 µs).
By using the encapsulated spark gap technology, safety distances to adjacent components within the distribution cabinet are unnecessary. Even at fault currents up to 50 kA rms a 35 A fuse will not trip when Dehnventil TT extinguishes the follow-on current.
As the combined current and overvoltage arresters have no leakage current, direct use of the device upstream of the meter is possible, and when testing the insulation, no disconnection is required. Dehnventil TT is compatible with other surge arresters in the Dehn Red/Line family.
By using the twin terminals, which are suitable for all types of conductors, connection is easy, and inductive volt drop across long connecting cables is avoided. An additional bus bar terminal at the output increases the combination possibilities with other DIN rail mounted components.
Indication is provided by means of green lights, or if required, the optional Dehnsignal DV remote monitoring module designed to inform the user on the state of the protection, even when he is not on site.
All Dehnventil devices have an additional earth terminal. This allows a safe connection to the main earth bar as well as short connection to the protective earth conductor of the power supply system.
For more information contact Paul Van As, Surgetek, 011 792 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