Mining electrical equipment manufacturer Emis Sales 2002 has completed upgrade projects comprising the design and installation of communication, automation and protection systems at South African anthracite producer and exporter Zululand Anthracite Colliery (ZAC), in KwaZulu-Natal, to improve productivity. The initial project at the MacNelly plant was the upgrade of the 11 kV plant substation, which involved replacing outdated equipment, old circuit breakers and a ring main unit during a planned shutdown, says Emis Sales 2002 MD Frikkie Quirk.
