Protect productivity during SA’s lightning season
February 2018
Electrical Power & Protection
South Africa’s summer season brings with it the possibility of lightning strikes. The massive voltage fluctuations caused by these can damage sensitive equipment, as well as cause data loss on computers, servers and storage devices. To combat this, DEHNcord surge arrester offers reliable protection from lightning interference in a flexible and space-saving package.
Hano Oelofse, DEHN Africa technical director, notes that Type 2 surge arrestors are devices designed to discharge the currents generated by indirect lightning strikes, which can cause induced or conducted over-voltages on the power distribution network. They are installed in the main distribution switchboard.
He explains: “The DEHNcord Type 2 surge arrester, available in single-pole, two-pole and three-pole versions, can be fitted in installation systems such as the terminal compartments of end loads, cable ducts or flush-mounted systems. The compact design allows it to be installed wherever the performance of a standard Type 3 surge protective device for terminal equipment reaches its limits. The lighting protection offered by DEHNcord helps to offset the possibility of lost productivity and costs for the repair or replacement of equipment after an unprotected lighting strike.”
It can also be used at the transition from lightning protection zone (LPZ) 0B to 1 or higher. DEHNcord meets the requirements of EN/IEC 61643-11. It has a short-circuit current withstand capability Isccr of 25 kA(rms) in case of mains-side over current protection, and a total discharge current of 20 kA (8/20 µs). Other features include:
• Single, two or three-pole surge protective device with monitoring system and disconnect.
• Visual fault indication.
• Types with disconnection of the load circuit in the event of a fault and protection of the control phase.
• Compact design also for outdoor use.
• Can be fitted in junction boxes, flush-mounted systems, cable ducts and flush-type boxes.
“Despite the compact design, the device houses a visual mechanical operating indication, as well as disconnecting the load as soon as it is tripped,” concludes Oelofse. “DEHNcord can be adapted to existing installation systems to ensure reliable protection of terminal equipment at minimum expense, takes up little space and saves installation time. When space is restricted in the cable duct, DEHNcord is the ideal solution thanks to its flexible terminals.”
For more information contact Hano Oelofse, DEHN Africa, +27 (0)11 704 1487, hano.oelofse@dehn-africa.com, www.dehn-africa.com
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