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Electrical installation for platinum mine expansion

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

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Electrical installation for platinum mine expansion

The construction is taking place at various areas existing North Concentrator Plant within the Mogalakwena mine, which is located in Limpopo province.


The Electrical Control Instrumentation (ECI) package is being led by Eben Kleynhans, E&I electrical project engineer from DRA Global.


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,” said 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 2 MVA transformers, stepping down from 11 kV to 550V, and a 630 kVA 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 630 kVA capacity and the other 330 kVA.


“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,” said Fisher. “The new transformer bay will be constructed next to the MCC, also with a roof over the transformer.”


About 70 km of cable will be laid – ranging from low to medium voltage cable – as well as 3,300 terminations and almost 2.5 km of cable racking. The various structures that Zest WEG will install require some 9t 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.


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