Sparks Electrical News July 2021

STANDBY AND EMERGENCY POWER

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Power utility reliability boost from large WEG transformers P recision manufacturing at the WEG Blumenau factory in Brazil allowed Zest WEG to supply two large, custom-built power transformers a month ahead of deadline to a power utility strengthening the reliability of the region’s power system.

raising its level of engagement with power producers and municipalities. Zest WEG’s portfolio includes power distribution equipment such as miniature substations, distribution transformers and power transformers, as well as packaged switchgear and automation solutions such as E-Houses, motor control centres (MCCs) and electrical enclosures. Among its power generation solutions are conventional die- sel generators, combined heat and power generation (CHP) and renewable energy generation. Other offerings relevant to the public sector include the supply of substations and electrical infrastructure, including the design, supply and construction of overhead lines, substation mechanical and electrical construction, and electrical high-voltage and low-voltage reticulation.

The fact that both 500 MVA, 400 kV transformers passed the factory acceptance test (FAT) first time around paved the way to early delivery. This achievement, accord- ing to Jan-Frederik Viljoen, executive transformers at Zest WEG, is a testament to the company’s design and manufacturing quality. The 348 t units are the largest yet produced by WEG – with each unit boasting a power rating of 500 000 kVA and voltage class of 400 kV. This delivery efficiency reinforces Zest WEG’s position in the local market. “Our South African team participated actively in this project, reaffirming WEG’s commitment to the development of our employees and the transfer of skills,” says

The largest transformer yet produced by WEG during manufacturing at the Blumenau factory in Brazil.

Enquiries: www.zestweg.com

Viljoen. “We see this as a vital contribution to the de- velopment of the country, as well as the alleviation of the energy shortage in the region.” He says the benefits of these transformers include robustness, flexibility and reliability – contributing di- rectly to the development of the local economy. They are also an important element of expanded invest- ment in emergency capacity to generate comple- mentary power supply for the region. Zest WEG’s manufacturing operations in South Africa include two transformer factories near Johan- nesburg, which produce and supply the local market with 145 kV voltage class transformers. This contract is an important achievement for Zest WEG, which is deepening its contribution to power generation, transmission and distribution as part of its develop- mental mandate. The company is well-established in the mining and industrial sectors, and is currently O nly high-quality batteries from reputable suppliers should be used for security and other mission critical equipment, to avoid potentially costly failures. This is according to the director of one of the country’s fastest growing bat- tery distributors, Greg Pritchard from GSS Group, who adds that intermittent load shedding and other environmental factors can quickly damage batteries that are not specifically designed and manufactured for these applications. “One of the easiest ways to gauge the quality of a lead acid battery is its weight,” explains Pritchard. “Lead is one of the most expensive components of a battery and is often where some manufactur- ers try to save. Our commonly sold 8 Ah battery, for example, is very heavy and has the required amount of lead to make it one of the most du- rable available. Beneath the skin are other design features that set these batteries apart, such as the type of acid used, layout and design. “Unfortunately for the installer or layman, these facts are not commonly known and it usually falls to trial and error to figure out which batteries are better, last longer and are best able to han- dle mission critical applications under any power conditions. That is where our GSS batteries have performed excellently and is the reason for our company’s rapid growth in the four years we have been trading. “Our batteries have been specified, designed and built according to our own requirements, us- ing knowledge based on thirty years of industry experience. We have applied the lessons learned and come up with a number of different types and sizes of batteries specifically for mission critical applications in South Africa,” he says. When not just any battery will do

Enquiries: +27 (0)10 140 7137

SPARKS ELECTRICAL NEWS

JULY 2021