High capacity arrester makes use of gliding spark gap technology
October 2001
Electrical Power & Protection
The Dehnventil from Surge Technology is a two or four-pole arrester incorporating patented specialised gliding spark gap technology, which limits overvoltage values to below 3 kV during direct lightning strikes. The spark gap operates in parallel with heavy-duty arresters, which reduce surge voltages caused by direct lightning strikes to below 900 V.
Capable of protecting against direct lightning strikes of 100 kA per pole, the Dehnventil carries the SABS mark of approval and is guaranteed to operate effectively for 10 years. It was the first product to be manufactured locally to comply with the IEC 1024-1-1 standards for lightning current arresters used between Zone 0 (outside a building) and Zone 1 (immediately inside the building).
In the event of a direct lightning strike with multiple partial surges into a low voltage reticulation network, damage to the arrester could be caused by the first partial lightning current, allowing subsequent damaging currents to pass into the building without being limited to safe levels. With the two-step spark-gap/varistor protection, the Dehnventil is suitable for both 220 V and 380 V systems.
In instances where highly frequent discharges or long lasting low amplitude lightning currents are experienced, the characteristics of the varistors may change, allowing unwanted currents to flow at lower voltages. The Dehnventil has been designed to contain a special control disconnection mechanism which, under these conditions, will disconnect the defective varistor and still provide direct lightning surge current protection.
A signal neon lamp indicates the triggered state of the disconnected mechanism Remote indication is also possible and a test button allows the status of the arrester to be checked at any time.
Surge Technology
(011) 792 1303
[email protected]
www.surgetek.co.za
Further reading:
Food industry operations – not as simple as flipping a switch
Schneider Electric South Africa
Electrical Power & Protection
The food industry represents a huge portion of the global economy, and is expected to reach $9,68 trillion in 2025. It is completely reliant on power, and due to its sheer size and the nature of its operations, power interruption can be catastrophic for its bottom line.
Read more...
Waste To Energy thermal technologies
DirectLogic Automation
Electrical Power & Protection
The vast quantities of waste produced around the world are a large and growing problem. Waste to Energy technology based on pyrolysis is a solution.
Read more...
New enhanced Breaker Status and Communication Module
Schneider Electric South Africa
Electrical Power & Protection
Schneider Electric has launched its new Breaker Status and Communication Module (BSCM) Modbus SL/ULP, which delivers enhanced performance, improved connectivity and simplified integration for power distribution systems.
Read more...
Building green industries to scale green economies
Electrical Power & Protection
Africa is taking bold steps to build green industries across the continent. Namibia is a trailblazer in the hydrogen space, with up to five Final Investment Decisions scheduled to be made in 2025/2026 and is pioneering a world first for green industrialisation.
Read more...
Easing the path for IPPs navigating South Africa’s energy regulations
Electrical Power & Protection
Independent Power Producers and developers venturing into South Africa’s renewable energy sector face a challenging regulatory landscape. SPS is a renewable energy asset management company that is actively expanding into the energy trading and wheeling market, which will enable businesses to buy and sell energy directly
Read more...
How energy storage will make or break SA’s renewable transition
Electrical Power & Protection
Energy storage is no longer an add-on, but the foundation of a reliable, resilient and renewable energy system. As South Africa accelerates towards a greener future, storage innovation could determine the difference between progress and paralysis.
Read more...
Condition-based maintenance can revolutionise business continuity
Schneider Electric South Africa
Electrical Power & Protection
As businesses experience growing pressure to enhance operational efficiency and reduce downtime due to electrical failure, condition-based maintenance becomes essential for preventing unforeseen equipment breakdowns by assessing the real-time health of electrical systems.
Read more...
Boiler selection for optimal thermal energy performance
Electrical Power & Protection
The changing world of boilers means companies wishing to improve their thermal energy efficiencies while containing costs and environmental impacts must make careful and informed decisions. AES’s rich pool of experience, ability to keep pace with new steam trends and technologies, and understanding of their clients’ production processes can assist clients to weigh up different options in a careful and informed manner.
Read more...
Securing Africa’s energy future starts at home
ACTOM Electrical Machines
Electrical Power & Protection
Africa’s energy demands are surging, but the current reliance on imported solar technology leaves the continent vulnerable. This is why the prospect of building inverters and lithium batteries locally, designed for South Africa’s specific needs, is so promising.
Read more...
Dry-type transformers for Dutch intake substation
Electrical Power & Protection
A data centre in the Netherlands is the site of a recent innovation on the transformer landscape, where TMC Transformers has designed, manufactured and installed dry-type transformers in a large intake substation.
Read more...
printer friendly version