The Econosub is typically a miniature substation where the customer requires an oil ring main unit (RMU). The housing is 1260mm in height compared to the SF6 ring main unit enclosure of 1500mm in height. 

Each econo miniature substation is designed and custom made and a full range of optional accessories are available to ensure that each and every individual customer’s requirements are met.

All our miniature substations carry the SABS mark.

The „Beachfront“ miniature substation‘s enclosure is manufactured from hot dip galvanised mild steel, whilst the tank is manufactured from corrosion resistant 3CR12 Steel. This unit is fitted with stainless steel tube radiators with a 3CR12 corrosion resistant steel header. This offers maximum protection for miniature substations located in highly corrosive environments.

All our miniature substations carry the SABS mark. 

The standard colour for miniature substations is Avocado C12 as specified in SANS 1097, but can be painted in various colours according to the customer requirements. Miniature substations are designed and custom built according to individual customer specifications and requirements.

High risk miniature substations manufactured by SGB-SMIT POWER MATLA are identical to the standard miniature substations with the below-mentioned differences:

• The MV and LV miniature substation doors are flush mounted.
• The miniature substation enclosure is manufactured from 6mm Mild Steel.
• All doors are re-enforced using additional steel strength members diagonally welded from corner to corner on the inside of the door.
• All doors are fitted with heavy duty hinges.
• A four point locking mechanism (top-centre, bottom-centre, left-centre and right centre) is operated using bars, and is fitted with a heavy duty door handle.

SGB-SMIT POWER MATLA is one of only two suppliers approved by ESKOM to supply this high risk unit. 

The high risk miniature substation is designed to reduce vandalism and prevent access to live chambers, which could cause serious injuries or result in fatalities. 

Each high risk miniature substation is designed and custom made and a full range of optional accessories are available to ensure that each and every individual customer’s requirements are met.