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:
How South Africa’s transformer manufacturing industry can fill a gaping infrastructure gap
ACTOM Electrical Machines
Electrical Power & Protection
South Africa’s energy transition is accelerating the demand for power transformers. However, this shift toward renewable energy is exposing a critical infrastructure gap: a severe shortage of transformers.
Read more...
General-purpose 350 W AC-DC power supply
Electrical Power & Protection
The TDK-Lambda GUS350 series of compact single-output general-purpose power supplies addresses the need for an economically priced product while maintaining reliability and quality.
Read more...
Ground-breaking battery tester
Comtest
Electrical Power & Protection
Midtronics offers the proven MVT handheld battery tester. This revolutionary tool, powered by MDX-AI, is set to redefine the standards of battery diagnostics and testing in the automotive industry.
Read more...
Green hydrogen could be the missing link in powering the future of technology
Electrical Power & Protection
Green hydrogen has numerous applications across multiple industries. It also has the potential to provide a clean energy source to power future technology, with far-reaching implications for both industry and society.
Read more...
Energy audits pave the pathway to sustainability and savings
Schneider Electric South Africa
Electrical Power & Protection
Energy audits serve as essential tools for businesses looking to reduce costs and meet environmental targets. By analysing energy consumption across systems such as lighting, HVAC, ICT and water infrastructure, audits identify inefficiencies and quantify carbon footprints, enabling data-driven decisions for operational and financial optimisation.
Read more...
Passive fire protection for lithium-ion battery risks
Electrical Power & Protection
In response to the growing threat posed by lithium-ion (Li-ion) battery fires, a breakthrough passive fire protection solution is now available in South Africa.
Read more...
Schneider Electric unveils new range of circuit breakers
Schneider Electric South Africa
Electrical Power & Protection
Schneider Electric has launched its new MasterPacT MTZ Active range of circuit breakers in South Africa. This is a revolutionary new circuit breaker designed to set new benchmarks for safety, efficiency and sustainability while ensuring business continuity.
Read more...
Reliable power for demanding applications
Conical Technologies
Electrical Power & Protection
In modern industrial automation, reliability, efficiency and compact design are critical when selecting power supplies. The Mibbo Power MTR480 three-phase DIN-rail power supply is engineered to meet these exacting requirements.
Read more...
Managing dynamic steam plant operation on a multi-user site
Electrical Power & Protection
Managing a dynamic steam plant operation featuring multiple users requires strong technical skills, good communication and close attention to optimising results. AES’s remote monitoring system gathers steam generation plant data and records critical operational monitoring parameters.
Read more...
South Africa’s journey to smart, greener transport
Schneider Electric South Africa
Electrical Power & Protection
The good news is that there are some truly feasible solutions that can assist in overcoming some of South Africa’s most pertinent transport electrification challenges.
Read more...
printer friendly version