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South African Class 20E
The Transnet Freight Rail Class 20E of 2013 is a South African electric locomotive. In early August 2013 the first of ninety-five Class 20E dual-voltage electric locomotives for Transnet Freight Rail was lowered onto its bogies for the first time. Ten of these locomotives were built by the Zhuzhou Electric Locomotive Company in China while the rest were built locally. Manufacturer The first ten of ninety-five 3 kV DC and 25 kV AC dual voltage Class 20E electric locomotives for Transnet Freight Rail were built in China by Zhuzhou Electric Locomotive Company, a subsidiary of the China South Locomotive and Rolling Stock Corporation (CSR), China's leading trai ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zhuzhou Electric Locomotive Co
Zhuzhou (, ), formerly Jianning (建宁), is a prefecture-level city of Hunan Province, China, straddling the Xiang River southeast of the provincial capital, Changsha, and bordering Jiangxi province to the east. It is part of the " Greater Changsha Metropolitan Region, also known as Changzhutan Golden Triangle" (comprising the cities of Changsha, Zhuzhou and Xiangtan). The city has jurisdiction over five counties ( Yanling, Chaling, Youxian, Liling, Zhuzhou) and four districts (Hetang, Lusong, Shifeng and Tianyuan, a high-tech industrial development zone), and covers an area of . , Zhuzhou had 3,855,609 inhabitants, of whom 1,055,373 lived in the built-up area (''4 urban districts''). With Xiangtan areas adjoining Zhuzhou due to be agglomerated in a few years' time, the joint built-up area will be home to 2,933,069 inhabitants. Zhuzhou is located in a subtropical monsoon climate zone and with its abundant mineral and organic resources has one of the highest agricultural yield ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black Economic Empowerment
Black Economic Empowerment (BEE) is a policy of the South African government which aims to facilitate broader participation in the economy by black people. A form of affirmative action, it is intended especially to redress the inequalities created by apartheid. The policy provides incentives – especially preferential treatment in government procurement processes – to businesses which contribute to black economic empowerment according to several measurable criteria, including through partial or majority black ownership, hiring black employees, and contracting with black-owned suppliers. The preferential procurement aspect of BEE has been viewed as paradigmatic of a sustainable procurement approach, whereby government procurement is used to advance social policy objectives. So-called "BEE deals" – transactions aiming to increase black ownership of large businesses – have been conducted on a large scale, with BEE transactions concluded between 1994 and 2005 valued at between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kimberley, Northern Cape
Kimberley is the capital and largest city of the Northern Cape province of South Africa. It is located approximately 110 km east of the confluence of the Vaal and Orange Rivers. The city has considerable historical significance due to its diamond mining past and the siege during the Second Anglo-Boer war. British businessmen Cecil Rhodes and Barney Barnato made their fortunes in Kimberley, and Rhodes established the De Beers diamond company in the early days of the mining town. On 2 September 1882, Kimberley was the first city in the Southern Hemisphere and the second in the world after Philadelphia, Pennsylvania in the United States to integrate electric street lights into its infrastructure. The first stock exchange in Africa was built in Kimberley, as early as 1881. History Discovery of diamonds In 1866, Erasmus Jacobs found a small brilliant pebble on the banks of the Orange River, on the farm ''De Kalk'' leased from local Griquas, near Hopetown, which was h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Elizabeth
Gqeberha (), formerly Port Elizabeth and colloquially often referred to as P.E., is a major seaport and the most populous city in the Eastern Cape province of South Africa. It is the seat of the Nelson Mandela Bay Metropolitan Municipality, South Africa's second-largest metropolitan district by area size. It is the sixth-most populous city in South Africa and is the cultural, economic and financial centre of the Eastern Cape. The city was founded as Port Elizabeth in 1820 by Sir Rufane Donkin, who was the governor of the Cape at the time. He named it after his late wife, Elizabeth, who had died in India. The Donkin memorial in the CBD of the city bears testament to this. Port Elizabeth was established by the government of the Cape Colony when 4,000 British colonists settled in Algoa Bay to strengthen the border region between the Cape Colony and the Xhosa. It is nicknamed "The Friendly City" or "The Windy City". In 2019, the Eastern Cape Geographical Names Committee recommended ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hotazel
Hotazel is a town in John Taolo Gaetsewe District Municipality in the Northern Cape province of South Africa. The town serves the manganese mines, 147 km (91 mi) north of Postmasburg and 46 km (28.6 mi) north-west of Kuruman Kuruman is a small town with just over 53,000 inhabitants in the Northern Cape province of South Africa. It is known for its scenic beauty and the Eye of Kuruman, a geological feature that brings water from deep underground. The abundance of water .... It takes its name from the farm on which it was laid out; a pun on 'hot as hell', referring to the weather when the farm was surveyed and the generally torrid climate surrounding the area. References Populated places in the Joe Morolong Local Municipality {{NorthernCape-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Manganese
Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy uses, particularly in stainless steels. It improves strength, workability, and resistance to wear. Manganese oxide is used as an oxidising agent; as a rubber additive; and in glass making, fertilisers, and ceramics. Manganese sulfate can be used as a fungicide. Manganese is also an essential human dietary element, important in macronutrient metabolism, bone formation, and free radical defense systems. It is a critical component in dozens of proteins and enzymes. It is found mostly in the bones, but also the liver, kidneys, and brain. In the human brain, the manganese is bound to manganese metalloproteins, most notably glutamine synthetase in astrocytes. Manganese was first isolated in 1774. It is familiar in the laboratory in the form of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South African Class 7E2, Series 2
The South African Railways Class 7E2, Series 2 is an electric locomotive. South African Railways placed 40 Class 7E2, Series 2 electric locomotives with a Co-Co locomotive, Co-Co wheel arrangement in service in 1983. Manufacturer The 25 kV AC Class 7E electric locomotive was designed for the South African Railways (SAR) by the 50 c/s Group, consisting of Ateliers de Constructions Electriques de Charleroi, ACEC of Belgium, AEG (German company), AEG-Telefunken and Siemens Mobility, Siemens of Germany, Alstom, Alsthom-Atlantique and Société MTE of France, and Brown, Boveri & Cie of Switzerland. The locomotives were built by Union Carriage & Wagon (UCW) in Nigel, Transvaal (province), Transvaal, which was the sub-contractor for mechanical components and assembly and delivered in 1983, numbered E7176 to E7215.Transnet ''Locomotives International'' issue 108 June 2017 page 22 UCW did not allocate builder's numbers to the locomotives it built for the SAR, but used the SAR unit numbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South African Class 7E2, Series 1
The South African Railways Class 7E2, Series 1 is an electric locomotive. South African Railways placed 25 Class 7E2, Series 1 electric locomotives with a Co-Co locomotive, Co-Co wheel arrangement in service in 1982. Manufacturer The 25 kV AC Class 7E2, Series 1 electric locomotive was designed for the South African Railways by the 50 c/s Group, consisting of Ateliers de Constructions Electriques de Charleroi, ACEC of Belgium, AEG (German company), AEG-Telefunken and Siemens Mobility, Siemens of Germany, Alstom, Alsthom-Atlantique and Société MTE of France, and Brown, Boveri & Cie of Switzerland. The locomotives were built by Union Carriage & Wagon (UCW) in Nigel, Transvaal (province), Transvaal, which was the sub-contractor for mechanical components and assembly and delivered in 1982, numbered E7151 to E7175.Transnet ''Locomotives International'' issue 108 June 2017 page 22 UCW did not allocate builder's numbers to the locomotives it built for the SAR, but used the SAR unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South African Class 7E
The South African Railways Class 7E is an electric locomotive. South African Railways placed 100 Class 7E electric locomotives with a Co-Co locomotive, Co-Co wheel arrangement in service in 1978/79. They were the first 25 kV AC locomotives to enter service in South Africa. Manufacturer The 25 kV AC Class 7E electric locomotive was designed for the South African Railways (SAR) by the 50 c/s Group, consisting of Ateliers de Constructions Electriques de Charleroi, ACEC of Belgium, AEG, AEG-Telefunken and Siemens Mobility, Siemens of Germany, Alstom, Alsthom-Atlantique and Société MTE of France, and Brown, Boveri & Cie of Switzerland. The locomotives were built by Union Carriage & Wagon (UCW) in Nigel, Transvaal (province), Transvaal, which was the sub-contractor for mechanical components and assembly. One hundred Class 7E locomotives were delivered in 1978 and 1979, numbered in the range from E7001 to E7100. Beginning with the Class 7E, the SAR numbering practice for electr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South African Class 19E
The Transnet Freight Rail Class 19E of 2009 is a South African electric locomotive. In 2009, Transnet Freight Rail placed the first of 110 Class 19E single-cab dual-voltage 3 kV DC and 25 kV AC electric locomotives with a Bo-Bo wheel arrangement in service on the Coalink line from Ermelo to Richards Bay. Manufacturer The dual-voltage 3 kV DC and 25 kV AC Class 19E is the product of a joint venture by Mitsui for the design, Toshiba for the electrical equipment, Union Carriage and Wagon (UCW) for the bodies and the RSD division of DCD-Dorbyl for the bogies. It was locally manufactured by UCW in Nigel, Gauteng. Road testing on the Class 19E started in August 2008. Characteristics The Class 19E was the first South African AC locomotive to incorporate regenerative as well as rheostatic electric braking. While regenerative braking was used on all South African mainline locomotives dating back all the way to the introduction of the Class 1E in 1925, the notable exception being the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porta-potty
A chemical toilet collects human excreta in a holding tank and uses chemicals to minimize odors. They do not require a connection to a water supply and are used in a variety of situations. These toilets are usually, but not always, self-contained and movable. A chemical toilet is structured around a relatively small tank, which needs to be emptied frequently. It is not connected to a hole in the ground (like a pit latrine), nor to a septic tank, nor is it plumbed into a municipal system leading to a sewage treatment plant. When the tank is emptied, the contents are usually pumped into a sanitary sewer or directly to a treatment plant. The portable toilets used on construction sites and at large gatherings such as music festivals are well-known types of chemical toilet. As they are usually used for short periods and because of their high prices, they are mostly rented rather than bought, often including servicing and cleaning. A simpler type of chemical toilet may be used in trave ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insulated-gate Bipolar Transistor
An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch, which, as it was developed, came to combine high efficiency and fast switching. It consists of four alternating layers (P–N–P–N) that are controlled by a metal–oxide–semiconductor (MOS) gate structure. Although the structure of the IGBT is topologically the same as a thyristor with a "MOS" gate ( MOS-gate thyristor), the thyristor action is completely suppressed, and only the transistor action is permitted in the entire device operation range. It is used in switching power supplies in high-power applications: variable-frequency drives (VFDs), electric cars, trains, variable-speed refrigerators, lamp ballasts, arc-welding machines, induction hobs, and air conditioners. Since it is designed to turn on and off rapidly, the IGBT can synthesize complex waveforms with pulse-width modulation and low-pass filters, so it is also used in switching ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
