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Electrical installation by Zest WEG at Platinum Expansion

The two backup generators, one of 630kVA capacity and the other 330kVA, supplied by Zest WEG

Storage containers being offloaded as part of site establishment

Transformer and racking installation for cables to be installed to supply the MCCs

Cable racking being installed

Containerised Motor Control Centres form part of Zest WEG’s scope of supply

27th July 2021

     

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Zest WEG is installing a range of electrical control and instrumentation equipment at Anglo American Platinum’s Mogalakwena mine in Limpopo province, working closely with engineering group DRA Global.

The construction is taking place within the Mogalakwena mine’s existing North Concentrator Plant, around various plant areas. The Electrical Control Instrumentation (ECI) package is being led by Eben Kleynhans, E&I electrical project engineer from DRA.

According to Calvin Fisher, electrical and instrumentation construction proposals manager at Zest WEG, the Zest WEG work is being conducted for the mine’s Coarse Particle Rejection (CPR) plant, and will be completed in the second half of 2021.

“In addition to applying the highest level of workmanship and professionalism, we are carrying out the project in line with our client’s Mining Charter requirements on local procurement,” says Fisher. “This means that over 70% of people involved in our scope of work will be drawn from local communities, and we are sourcing a significant level of our supplies from local businesses.”

Equipment to be installed includes three 2MVA transformers, stepping down from 11kV to 550V, and a 630kVA mini substation for lighting and small power requirements. Containerised Motor Control Centres (MCCs), complete with Variable Speed Drives (VSDs), an HVAC unit, cable racking, cables, lighting and small power also form part of the scope of supply. In addition, two backup generators will be installed – one of 630kVA capacity and the other 330kVA.

“The three new containerised MCCs and VSD sets will be placed on plinths near the CPR feed tank, CPR process water area and CPR building and a steel roof structure erected over the containers,” he says. “The new transformer bay will be constructed next to the MCC, also with a roof over the transformer.”

About 70km of cable will be laid – ranging from low voltage to medium voltage cable – as well as 3300 terminations and almost 2,5km of cable racking. The various structures that Zest WEG will install require some 9 tonnes of steel. The instrumentation to be installed will comprise about 170 instruments including flow transmitters, pressure gauges, level switches, temperature gauges and density transmitters. There will also be around 250 lights installed, mainly outdoors.

Fisher notes that the electrical installation specialists are typically among the last contractors on a project, and must be quite flexible to accommodate certain modifications that may have been required in the civils, structural and mechanical work completed beforehand.

“Wherever necessary, we work closely with the client to implement the plan smoothly while meeting their need for safe access to the equipment being installed, to allow maintenance to be readily conducted,” he says.

In addition to the installation contract, Zest WEG is supplying some of the actual items of equipment for the expansion project, including WEG motors and containerised generators. The electrical installation work is expected to take about six months.

“We are proud of the high level of quality that we bring to projects like this, where we apply our successful model of procurement to support our clients in meeting their critical local expenditure targets,” he says. “This also allows Zest WEG to make a valuable contribution to uplift local companies wherever we can.”

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Edited by Creamer Media Reporter

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