The Zest WEG Group has extended its market reach into a new arena with the successful handover to Eskom’s Central Region of four 22 kV/11 kV mobile distribution switching stations, conceptualised and manufactured by Zest Energy. These one-of-a-kind fully integrated units were engineered to suit specific Eskom requirements including the ability to be used in different configurations.
The mobile stations can be deployed to site and quickly connected to support substation maintenance or emergency circumstances, improving the availability of Eskom’s electrical network. These units were also manufactured in accordance with South African road ordinance requirements to eliminate the need for special transportation permits.
“Zest Energy is involved in different types of substation and reticulation project work including fixed type conventional outdoor substations (typically up to 275 kV) as well as mobile substation solutions with a variety of configurations and voltages to meet different customer needs,” says Alastair Gerrard, Zest Energy projects manager.
“Part of the integrated solution is that all protection systems are on-board, together with the supporting systems that enable the operation of switchgear in a safe and controlled environment. This is essentially a fully-fledged switching station on wheels that runs on external auxiliary power supplied by the customer. It is a truly mobile solution that can easily be moved to site as and when the need arises.”
Each mobile distribution switching station comprises two compartments: a medium voltage (MV) switchgear compartment and a switching control compartment, separated by an internal wall. Both compartments can be accessed directly from the outside of the trailer through fold-down single lever operated doors with fully incorporated handrails and steps. There are also sliding doors behind each main door to facilitate safe use of the switching station during extreme weather conditions.
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