http://www.engineeringnews.co.za
  SEARCH
Login
R/€ = 13.58Change: 0.17
R/$ = 10.95Change: 0.02
Au 1201.61 $/ozChange: 2.45
Pt 1226.50 $/ozChange: -3.50
 
 
Note: Search is limited to the most recent 250 articles. Set date range to access earlier articles.
Where? With... When?








Start
 
End
 
 
And must exclude these words...
Close Main Search
Close Main Login
My Profile News Alerts Newsletters Logout Close Main Profile
 
Agriculture   Automotive   Chemicals   Competition Policy   Construction   Defence   Economy   Electricity   Energy   Environment   ICT   Metals   Mining   Science and Technology   Services   Trade   Transport & Logistics   Water  
What's On Press Office Tenders Suppliers Directory Research Jobs Announcements Contact Us
 
 
 
RSS Feed
Article   Comments   Other News   Research   Magazine  
 
 
Aug 10, 2012

Furnace switchgear achieves rated currents of 4 500 A

Back
Berlin|Mannheim|Components|Design|Flow|Safety|Siemens|Switchgear|System|Systems|Testing|Germany|Turkey|United States|Electronics|Flow|Furnace Switchgear Systems|Maintenance|Products|Services|Steel|Systems|Environmental|Power
|Components|Design|Flow|Safety|Siemens|Switchgear|System|Systems|Testing||Flow|Maintenance|Products|Services|Steel|Systems|Environmental|Power
berlin|mannheim|components|design|flow-company|safety|siemens|switchgear|system|systems-company|testing|germany|turkey|united-states|electronics|flow-industry-term|furnace-switchgear-systems|maintenance|products|services|steel|systems|environmental|power
© Reuse this

Electronics company Siemens reports that its Simetal Sivac-X 4K furnace switchgear has reliably switched a rated current of more than 4 500 A with a single circuit breaker during a successful type test according to IEC 62271.

Global testing services provider, the CESI group, performed the type test in Mannheim and Berlin, in Germany.

“This is significantly more than conven- tional furnace switchgears achieve. “The switchgear has a rated voltage of 40.5 kV and can supply electric arc furnaces (EAFs) with up to 300 MVA of power,” the company states.

The lightning impulse voltage is 200 kV, which makes the switchgear suitable for the North American market.

The switchgear has achieved the fault arc qualification of Internal Arc Classified A FLR of 40 kA/1s and also meets the highest demands for personnel safety.

The core component is the 3AH4 medium-voltage circuit breaker.

The Simetal Sivac-X 4K switchgear is designed to meet the extreme requirements of high-power EAFs and ensures a reliable power supply, as well as safe plant operation. Long maintenance intervals of up to 10 000 switching cycles increase availability and reduce operating costs.

The 3AH4 range of frequency circuit breakers are designed for use under extreme environmental conditions. These include high temperatures, high air pollution, unstable operating currents, frequent short-circuit releases and operating cycles with more than 100 switching cycles a day.

For this reason, the circuit breakers have a rugged, insulated support design and are equipped with freely accessible vacuum interrupters. This enables the interrupters to be replaced easily at the end of their life span of about 30 000 switching cycles.

The circuit breaker is specifically designed so that air can flow freely along the heat sinks. This enables the switching device to operate at up to 4 500 A in ambient temperatures of up to 40 °C without forced cooling.

The drive for the 3AH4 circuit breaker range is designed for up to 120 000 switching cycles over its entire life cycle.

About 400 furnace switchgear systems of the Simetal Sivac-X range are in use worldwide. Siemens offers switchgear for operating voltages ranging from 15 kV to 40.5 kV and rated currents from 1 250 A to meet the specific requirements of steelmakers.

According to the specific circumstances in the electric steel plant, the switchgear can be designed as an open unit with a permanently installed furnace circuit breaker, as a two-field system in a metal enclosure with a permanently installed circuit breaker, or as a single-field solution in a metal enclosure with a withdrawable furnace circuit breaker mounted on a traveling carriage.

The range of products also includes the customised protection circuit, which is essential for the operational safety of the vacuum circuit breakers and connected components.

The arcing-fault tested design, the metal encapsulation, interlocks, the capacitive voltage testing system and the IP4X degree of protection ensure maximum safety for personnel.

The first 3AH4 furnace circuit breakers, with rated currents of 3 150 A and 4 000 A respectively, are in use in steelworks in Germany and Turkey. The first US-bound 4 000 A switchgear is currently being delivered.

Edited by: Chanel de Bruyn
© Reuse this Comment Guidelines (150 word limit)
 
 
 
 
 
 
 
 
Other Furnaces, Kiln, Ovens and Dryers News
LOCALLY PRODUCED Dryers for Africa manufactures all its equipment at the company factory, in Mpumalanga
There is a significant drive throughout Africa to combat food shortages by reducing raw-product wastage, and agri-dryer technology is being used to tackle this issue by extending the shelf life of food stuffs, thereby allowing for longer marketing timelines and...
HySA PROJECT FURNACE The furnace will assist Hydrogen South Africa Systems in locally developing commercial activities in hydrogen and fuel cell technologies
The Hydrogen South Africa (HySA) Systems Integration & Technology Validation Competence Centre, at the University of the Western Cape, in Cape Town, installed induction heating solutions company Hot Platinum's (HPT's) high-temperature vacuum furnace for a project...
Trevor Dickinson Dickinson Group will establish Dickinson Zambia, in the Copperbelt province, by the end of this year
Local projects constitute about 70% of local furnace and industrial services company Dickinson Group’s yearly revenue, but the company aims to increase its stake in the African market by establishing new and strengthening existing subsidiaries on the continent....
More
 
 
Latest News
Industrialisation remains a major part of the South African developmental agenda and an important vehicle towards achieving the Department of Trade and Industry’s (DTI’s) target of creating 100 black industrialists in the next five years, Trade and Industry...
The construction of a new innovation hub in the heart of the Dube TradePort, in Durban, was set to kick off in March 2016, as Dube TradePort Corporation sealed a R160-million lease agreement with Eureka Capital. Eureka Capital planned to develop a seven-storey 21 500...
South Africa will become the first African country to host the Organisation for Economic Cooperation and Development’s (OECD’s) Steel Committee Conference when the committee’s seventy-seventh session takes place in Cape Town between December 11 and 12. The...
More
 
 
Recent Research Reports
Defence 2014: A review of South Africa's defence industry (PDF Report)
Creamer Media’s Defence 2014 report examines South Africa’s defence industry, with particular focus on the key participants in the sector, the innovations that have come out of the sector, local and export demand, South Africa’s controversial multibillion-rand...
Road and Rail 2014: A review of South Africa's road and rail infrastructure (PDF report)
Creamer Media’s Road and Rail 2014 report examines South Africa’s road and rail transport system, with particular focus on the size and state of the country’s road and rail network, the funding and maintenance of these respective networks, and the push to move road...
Real Economy Year Book 2014 (PDF Report)
This edition drills down into the performance and outlook for a variety of sectors, including automotive, construction, electricity, transport, steel, water, coal, gold, iron-ore and platinum.
Real Economy Insight: Automotive 2014 (PDF Report)
This four-page brief covers key developments in the automotive industry over the past 12 months, including an overview of South Africa’s automotive market, trade figures, production and the policies influencing the sector.
Real Economy Insight: Construction 2014 (PDF Report)
This five-page brief covers key developments in the construction industry over the past 12 months. It provides an overview of the sector and includes details of employment in the sector, infrastructure and municipal spending, as well as insight into companies’...
Real Economy Insight: Electricity 2014 (PDF Report)
This five-page brief covers key developments in the electricity industry over the past 12 months, including details of State-owned power utility Eskom’s generation activities, funding and tariffs, independent power producers and prospects for the sector.
 
 
 
 
 
This Week's Magazine
JSE-listed real estate investment trust (REIT) Rebosis Property Fund achieved a distribution growth of 8.1% to 99.45c per linked unit in the financial year ended August 31, despite volatile market conditions.
JAMES ROBERTS The MOM incubator was designed to help babies in developing nations who were dying in conflict-struck nations or who do not receive hospital care
A low-cost, inflatable incubator won this year’s international James Dyson design award, which aims to encourage and inspire the next generation of design engineers.
The World Bank released its ‘Doing Business 2015: Going Beyond Efficiency’ report last month and ranked South Africa 43 out of 189 global economies for its ease of doing business, with Singapore topping the rankings.
Air Products South Africa officially launched its R300-million Eastern Cape air- separation unit (ASU), at its new manufacturing facility in the Coega Industrial Development Zone (IDZ), earlier this month. It is the second facility that Air Products launched in South...
BMW South Africa (SA) has signed a power purchasing agreement with energy company Bio2Watt. The offtake partnership will bring renewable energy to the carmaker’s Rosslyn plant, north of Pretoria.
 
 
 
 
 
 
 
 
 
Alert Close
Embed Code Close
content
Research Reports Close
Research Reports are a product of the
Research Channel Africa. Reports can be bought individually or you can gain full access to all reports as part of a Research Channel Africa subscription.
Find Out More Buy Report
 
 
Close
Engineering News
Completely Re-Engineered
Experience it now. Click here
*website to launch in a few weeks