Back channel cooling saves energy and operating costs at Kolomela Mine, South Africa Case story By employing VLT® drives with back channel cooling, the mine saves approximately 80 kW of electrical power. This benefit exceeds the power savings achieved by using high-efficiency motors instead of standard efficiency motors on the site. Substation installation At the Kolomela iron ore mine in South Africa, three 710 kW VLT® drives are inst

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