Surge arrestors for photovoltaic systems
December 2010
Electrical Power & Protection
Dehn’s modular Type 2 DEHNguard M YPV surge arresters are designed for protecting low voltage equipment in photovoltaic systems. The innovative three-stage DC switching device enables the arresters to fulfil IEC 60364-7-712:2002-05 requirements for modern photovoltaic systems. The combined disconnection and short circuit protection prevents fire damage due to DC arcs. The module locking system fixes the protection modules in the base part of the arrester. Shock, vibration or mechanical impulses resulting from discharges do not affect the connection to the protection module.
In order to avoid incorrect insertion, the protective circuit is mechanically coded and is easily replaced without tools. Three types are available for protecting photovoltaic systems up to 600 V, 1000 V and 1200 V.
Green and red indication shows the readiness for operation. Apart from this visual indication, units also feature a three-pole terminal for remote signalling, which can be used as a make or break contact depending on the circuit concept.
The modular family incorporates multifunctional terminals on a standardised spacing for connection of conductors and bus-bars for easy wiring to other DIN mounted devices.
For more information contact Paul van As, Surgetek, +27 (0)11 792 1303, info@surgetek.co.za, www.surgetek.co.za
Further reading:
High-performance industrial power converters
Electrical Power & Protection
Vepac Electronics supplies PowerGood’s range of industrial AC/DC and DC/DC converters, spanning 15 W to 700 W, with full protection features and compliance with EN55032 Class A and Class B electromagnetic interference standards.
Read more...
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...
printer friendly version