Prepared by the Economic Analysis Unit: AGRICULTURAL

South Africa’s economic outlook has improved, with GDP growth of 2.1% projected in 2020 South Africa’s stable macroeconomic environment provides a strong platform to attract much-needed foreign savings that can fund additional investment. There is optimism among the South AfricanGet price

Radio and Development in Africa - GOV.UK

of standards within the profession. African radio journalists are mostly poorly trained, if trained at all, and there is a high turnover and brain-drain out of the profession. Faced with this scenario the need for investment in training is continuous and vital. Radio stations face many technical challenges, but also opportunities. AlternativeGet price

What is quenching an arc? - Standex Electronics

When the reed contacts open they break a circuit. If there is a voltage and current present when the contacts open they will stop the current flow. Once the contacts open the voltage that was driving the current will reappear across the contacts. This is normally not an issue unless the voltage is generally higher than 250 volts. At this level and higher when the contacts attempt to open theyGet price

INSTRUCTION MANUAL AQ 2000 Arc Quenching System

Instruction manual – AQ 2000 arc quenching system ) 6 ( 25 2 GENERAL AQ 2000 is an arc quenching system for rapid arc extinguishing of arc faults within the metal-clad and metal enclosed switchgear. It is rated up to 40kA for 1 second at up to 17.5kV. AQ 2000 is an add-on system to AQ 100 series arc protection system. While AQGet price

ARC Ltd Board of Directors – African Risk Capacity

Notable awards include: Chief Executive Officer of the Year (2017) for the significant contribution made to Africa’s economy as Chief Executive Officer of AGCS Africa (Africa Economy Builders Awards); Outstanding Woman Leadership Award (Africa Leadership Awards 2015), Choiseul 100 Africa Top Economic Leaders for Tomorrow (2014 and 2015) andGet price

An arc quenching system - NASA/ADS

An arc-quenching system is described which is used to automatically extinguish arcs caused by transient or statistical flashover of a high voltage system. A crossed-field interrupter tube (XFT) is employed in a novel manner to activate a low-voltage commutation circuit which interrupts the arc current and reapplies the voltage to the system after a suitable delay. <P /Get price

The African commute: city transport trends - Medium

May 03, 2018 · There are socio-economic differences in how transit is used in African cities, as elsewhere globally. More than 75 percent of total daily trips made by Africa’s poor are by walking, compared 45Get price

Application Areas - Arcteq

The AQ-1000 arc quenching system is designed to limit the total arcing time to 5 ms and to minimize (or even eliminate) the damaging effects caused by the arc fault’s temperature and pressure. In most applications this will result in an energy release of less than 1 cal/cm². AQ-1000 is fully reusable which allows for full system testing on site. AQ-1000 is used in conjunction with the AQ-100 arc protection system.Get price

What China Is Really Up To In Africa - Forbes

Nothing Without InfrastructureDebt Trap?What Does China Get Out of this?As Chinese President Xi Jinping once pointed out, “Inadequate infrastructure is believed to be the biggest bottleneck to Africa’s development.” Collectively, the countries of Africa would need to spend $130-170 billion per year to meet their infrastructure needs, but, according to the African Development Bank, they are coming up $68-$108 billion short. Closing Africa’s infrastructure gap has been the obsession of multiple waves of colonists, and China is the next in line to reach into the heart of the continent with railroads, highways, and airports. “Europeans built infrastructure in Africa at the turn of the century, purportedly also for local economic development, but in essence the projects were used for natural resource extraction. The predecessor of both the Nairobi-Mombasa and Addis Ababa-Djibouti railways can be categorized as such. Both connect inland regions with mineral deposits with major ports on the Indian Ocean,” wrote Xiaochen Su on The Diplomat. Infrastructure is wh...Get price

Methods of Arc Extinction in Circuit Breaker

Therefore, dielectric strength of the medium between the contacts can be increased by cooling the arc (iv) blast effect : If the ionised particles between the contacts are swept away and replaced by un-ionised particles, the dielectric strength of the medium can be increased consider-ably. This may be achieved by a gas blast directed along theGet price

How Arc-Quenching Switchgear Improves Safety | Pumps Systems

Passive ProtectionActive ProtectionCurrent-Limiting Arc-Quenching SystemsConclusionSince the introduction of arc-resistant electrical equipment, the design paradigm has been to create a method of containing the energy from an arc flash event and redirecting it away from the operator. These methods typically include heavily reinforcing the electrical equipment enclosure using thicker-gauge steel, reinforced hinges and multipoint door latches to contain the arc energy and prevent enclosure fragmentation and burn-through. Mounted on top of the gear, plenums connected to ducts serve to redirect the arc gasses through the top of the equipment and out of the room. Such designs benefit from simplicity and acquisition costs. These passive arc-resistant designs require no electronics or electrical power to function. Minimal technological advancements were required to develop these designs. All that was needed was a more robust equipment enclosure. The incremental costs of such arc-resistant equipment remain relatively low, requiring only the addition of more steel and more...Get price

Arc flash protection study

of busbar protection. The different medium voltage levels encoun-tered at a typical power station like Kendal are 3,3 kV, 6,6 kV and 22 kV. It is important to understand the type of protection applied on the incomers to each MV or LV board as the speed of operation is essential in clearing the fault.Get price

List of radio stations in Africa - Wikipedia

The widest reach (number of transmitters throughout the country) of any Namibian radio station (except Namibian Broadcasting Corporation). Katutura Community Radio: Broadcasts on 106.2 FM in Windhoek. A community radio station based in a Windhoek suburb - Katutura. Kudu FM; Omulunga Radio; 99FM: English medium, commercial radio station.Get price

Sulfur hexafluoride circuit breaker - Wikipedia

Sulfur hexafluoride circuit breakers protect electrical power stations and distribution systems by interrupting electric currents, when tripped by a protective relay. Instead of oil, air, or a vacuum, a sulfur hexafluoride circuit breaker uses sulfur hexafluoride gas to cool and quench the arc on opening a circuit. Advantages over other media include lower operating noise and no emission of hot gases, and relatively low maintenance. Developed in the 1950s and onward, sf6 gas circuit breakers are widGet price

What is an Arc ? | Arc in Circuit Breaker | Electrical4U

Feb 24, 2012 · Before going through details of arc quenching or arc extinction technologies employed in circuit breaker we should know first what is arc actually.. What is an Arc? During opening of current carrying contacts in a circuit breaker the medium in between opening contacts become highly ionized through which the interrupting current gets low resistive path and continues to flow through this pathGet price

Africa′s quiet cryptocurrency revolution | Africa | DW | 08

Oct 08, 2020 · Africabiggest economy Nigeria is leading the way, having recently made cryptocurrency legal and issuing regulatory guidelines for digital currencies and crypto-based companies or start-ups.Get price

Arc Flash Protection System Market Size, Share, Forecast 2028

The lack of will among small and medium scale companies in developing countries to invest in safety equipment is going to hamper the arc flash protection system market. Also, the company has to bear the additional cost of providing safety equipment, and training is retarding the growth of the arc flash protection system market.Get price

Arc Quenching | Low Voltage Switchgear | Eaton

Arc Quenching Device is a UL Recognized Component per UL 2748. Short circuit withstand rating up to 85 kA at 635 V ac. Short-time withstand current rating, 85 kA for 30 cycles. <4 ms arc quenching time. Current limiting – at least 25% reduction in peak fault current. At least 44% reduction in peak system stress.Get price

Nation - Breaking News, Kenya, Africa, Politics, Business

May 08, 2021 · Nation.Africa brings the Latest News from Kenya, Africa and the World. Get live news and latest stories from Politics, Business, Technology, Sports and more.Get price

Google

Search the worldinformation, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.Get price

Obesity Was Rising as Ghana Embraced Fast Food. Then Came KFC

Oct 02, 2017 · Ghana, a coastal African country of more than 28 million still etched with pockets of extreme poverty, has enjoyed unprecedented national prosperity in the last decade, buoyed by offshore oil.Get price

Advertising industry costs South Africa | Statista

Mar 15, 2021 · The entire advertising market in South Africa in 2019 is estimated to be worth 30.4 billion South African rand (approximately 2.05 billion U.S. dollars), and TV and video advertising spending isGet price

The Economist - World News, Politics, Economics, Business

Middle East Africa Abubakar Shekau, Boko Haram’s vicious leader, is said to be dead. This time it is probably true. Graphic detail English clubs are dominating European football once again.Get price

Contact Corporate Office

P.O. Box 8783, Pretoria, 0001, SOUTH AFRICA GPS Coordinates: S 25° 44' 55. 8" E 28° 14' 14. 0" Enquiries: Public Relations or Webmaster Reception: +27 (0)12 427 9700 ~ Fax: +27 (0)12 430 5814. Directions to ARC in Hatfield, Pretoria from Johannesburg:Get price

Zodiak Broadcasting Station -ZBS TV - Home | Facebook

The Duke and Duchess of Sussex will head to South Africa together, while Harry will also visit Angola, Malawi and Botswana between September 23 and October 2, Buckingham Palace revealed on Friday. It will be their first official overseas trip as a family, as Meghan returns from maternity leave, and will focus on "community, grassrootsGet price

Surf Trip South Africa - Home | Facebook

Surf Trip South Africa, Uvongo Beach, Kwazulu-Natal, South Africa. 539 likes · 2 were here. We offer guided surfing trips on the East Coast of South Africa. Starting from the KZN South Coast to...Get price

WFP boosts assistance in Lebanon as economic crisis deepens

May 26, 2021 · The World Food Program says it is tripling its assistance to Lebanon, offering cash assistance to nearly 300,000 people amid an unparalleled financial and economic crisisGet price

Pipeline Ransomware Attack Fuels Gas Station Shortages, Long

May 11, 2021 · And the gas station I always get gas at is out. Fun to find out about this whole hack job when you’re sitting at 40 miles til E ‍♀️ — Mandy Edwards (@memktgservices) May 10, 2021. This gas station in Robbinsville is all out of gas. Clerk said manager told her it could be five days before they have gas again.Get price

Chinaelectric car strategyimplications for U.S. energy

Oct 22, 2020 · China Economy Chinaelectric car strategy is starting to go global – and the U.S. is lagging behind Published Thu, Oct 22 2020 7:00 PM EDT Updated Thu, Oct 22 2020 7:09 PM EDTGet price