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:
Power portfolio with enhanced static transfer switch for critical applications
Electrical Power & Protection
Vertiv has launched the Vertiv PowerSwitch 7000, a next-generation static transfer switch that strengthens the company’s position as a complete power solutions provider.
Read more...
Why utilities must prioritise maintenance of SA’s remote data
Schneider Electric South Africa
Electrical Power & Protection
The story of power generation is more than meets the eye. Beyond energy distribution and the infrastructure are invisible, point of presence data centres located the remotest parts of our country that play a fundamental role in keeping systems running
Read more...
The house that revolutionises substations
WEG Africa
Electrical Power & Protection
Traditional substations have major drawbacks in terms of their construction and resilience. One solution is the E-house, a prefabricated, customised and transportable steel structure designed to house a range of electrical and automation equipment.
Read more...
Localised inverter-integrated transformer
Electrical Power & Protection
ACTOM, South Africa’s largest manufacturer, repairer and distributor of electromechanical equipment, is launching a breakthrough in renewable energy integration with its localised inverter-integrated transform
Read more...
Steinmüller Africa integrates advanced technologies at Mondi’s boiler project
Electrical Power & Protection
Steinmüller Africa is leading a boiler project at Mondi’s Richards Bay mill. The 18-month undertaking showcases the company’s blend of engineering excellence and cutting-edge technology.
Read more...
ABB innovation for energy efficiency and sustainability
Electrical Power & Protection
The application of sensor technology to reduce the operational and standby power losses of traditional current and voltage transformers can lead to energy savings of 181 MWh over a 30-year period, the lifetime of a typical switchboard in the African environment.
Read more...
UPS systems are key to keeping SA’s automotive industry up and running
Schneider Electric South Africa
Electrical Power & Protection
During loadshedding, PLCs and OT systems often fail, not because they are directly tied to the factory’s core manufacturing process, but because they are now an integral part of IT infrastructure. When an IT system shuts down, the impact is far more complex than simply restarting machinery.
Read more...
ACTOM advances energy infrastructure
Electrical Power & Protection
At this critical juncture where South Africa is poised to modernise its power infrastructure, ACTOM’s Engineering Projects and Contracts (EPC) Division showcased its capabilities for the first time at Enlit Africa 2025.
Read more...
Advanced contactor solution to revolutionise motor management
Schneider Electric South Africa
Electrical Power & Protection
Schneider Electric South Africa has launched the TeSys Deca Advanced, an advanced contactor solution designed to revolutionise motor management with unparalleled efficiency, reliability, simplicity and sustainability.
Read more...
Steaming ahead with boiler skills development
Electrical Power & Protection
As an expert in steam and boiler operations and maintenance, AES is very focused on safety, quality, technology advancement and the development of human capital. The company invests heavily in training and the promotion of talented people on an equal opportunity basis into the industrial operations environment.
Read more...
printer friendly version