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, info@surgetek.co.za, www.surgetek.co.za
Further reading:
Decarbonising the energies and chemical industry without the risk
Schneider Electric South Africa
Electrical Power & Protection
Schneider Electric argues that decarbonisation in Africa’s energies and chemical industry need not compromise production or profitability. A phased, digitally enabled approach, starting with energy efficiency improvements, can reduce emissions while strengthening competitiveness.
Read more...
Modular UPS system with scalable, high-availability architecture
Electrical Power & Protection
Legrand South Africa has launched its fifth-generation TriMOD three-phase modular UPS, available from 10 to 80 kW. The system features hot-swappable modules, multiple input/output configurations, and up to 99% efficiency in Eco Mode, designed for data centres and critical industrial environments.
Read more...
Accurate illuminance measurement for safer, more efficient environments
Electrical Power & Protection
The Sonel LXP-10A illuminance meter is designed for accurate measurement of lighting levels in industrial environments where adequate illumination is essential.
Read more...
Why mining operations need local lightning early warning
Senseca
Editor's Choice Electrical Power & Protection
Lightning can develop into a serious mining hazard before the first local strike, leaving crews little time to stop work and reach safety. Local early-warning technology can provide valuable lead time, allowing mines to connect developing storm conditions to defined trigger actions that protect people, explosives and equipment.
Read more...
South Africa’s dirtiest fuel is building its most resilient boilers
Electrical Power & Protection
Steinmüller Africa argues that duff coal, the low-grade fines and discards stockpiled over decades, can now underpin reliable, compliant industrial boilers using mature circulating fluidised bed combustion technology, turning a long-standing liability into a phased energy transition pathway.
Read more...
Retrofitting for sustainability
Schneider Electric South Africa
Electrical Power & Protection
As budgets tighten and sustainability targets increase, retrofit and modernisation strategies are gaining traction across Africa, allowing organisations to upgrade only what limits performance while preserving existing infrastructure and extending asset life.
Read more...
USB-Datalogger for voltage 0 to 30 V DC
Vepac Electronics
Electrical Power & Protection
The PeakTech 5186 is a data logger for DC voltages from 0 V to 30 V with terminals on the top of the device.
Read more...
Pole-top boxes for smarter, more secure electricity networks
Electrical Power & Protection
As South Africa accelerates the rollout of smart prepaid electricity metering, innovative enclosure technology from Power Process Systems is helping utilities improve network security, reduce electricity theft and protect critical electrical infrastructure.
Read more...
Simplifying electrical design compliance
Electrical Power & Protection
Referro Systems highlights how Rockwell Automation’s Global SCCR Tool simplifies short-circuit current rating compliance for complex industrial electrical systems.
Read more...
Engineering resilience into Africa’s energy future
Electrical Power & Protection
Zutari’s managing director of water explains how Burundi’s landmark Jiji and Mulembwe hydropower projects demonstrate what resilient, climate-adapted infrastructure delivery looks like – and what this means for Africa’s energy future.
Read more...
printer friendly version