Improved lightning protection in less space
September 2001
Electrical Power & Protection
The new DEHNventil is a combined Class I lightning current arrester and Class II surge arrester in one compact unit requiring only 30% of the space of similar devices. No de-coupling coils are necessary as the complete unit can easily be installed in different types of power supply systems. Previously, up to 20 devices had to be installed and connected to provide the same level of protection.
By using the encapsulated spark gap technology, safety distances to adjacent components within the distribution cabinet are unnecessary. Even at fault currents up to 25 kA r.m.s., a 35 A fuse will not trip when DEHNventil extinguishes the follow-on current.
The device makes calculations unnecessary. Its discharge capability meets level 1 of IEC, EN and VDE standards, the highest requirements of lightning protection at present. It is capable of protecting equipment, even in the case of a lightning strike with an intensity of 200 000 A (10/350).
The combined current and surge arrester has no leakage current, which allows direct use of the device upstream of the meter, and when testing the insulation, no disconnection is required. It is compatible with other surge arresters in the DEHN RED/LINE family, as well as with the Un = 230 V terminal input.
By using the twin terminals, connection is easy, and no additional terminal blocks are required for load currents equal to or less than 125 A. An additional bus bar terminal at the output increases the combination possibilities with other DIN-rail-mounted components. LED indication is provided, or if required, the optional DEHNsignal DV remote monitoring module informs the users on the state of the protection - even when they are not on site.
All DEHNventil devices have an additional earth terminal. This allows a safe connection to the main earth bus bar as well as short connection to the protective conductor of the power supply system. DEHN is represented locally by Surge Technology.
Surge Technology
(011) 792 1303
[email protected]
www.surgetek.co.za
Further reading:
The journey towards renewable energy in the Seychelles
Electrical Power & Protection
The Seychelles is committed to its ambitious goal of achieving net-zero carbon emissions by 2050. Recent technological advancements and strategic planning are steadily paving the way for a more sustainable future.
Read more...
High performance power distribution
Electrical Power & Protection
Hexagon Electrical plays an important role in enhancing efficiency and safety through the supply and support of a wide range of critical equipment for hazardous industrial and mining sectors in Africa.
Read more...
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...
printer friendly version