Compact substations are widely used in areas where underground power reticulation is required, such as in residential, commercial and industrial developments. Compact substations fully enclose a transformer,HV and LV connections or switchgear, and are shipped to site fully assembled. A compact substation is a cost effective and aesthetically pleasing solution.
Many standard and pre-engineered compact substation arrangements are available. All styles are fully rated in their enclosures, which are:
Inline kiosk (HV, transformer, LV) with oil containment In line kiosk (HV, transformer, LV) without oil containment Pad mount style (HV and LV on one side of transformer) without oil containment. Enclosures vary depending on the application, but are made from mild steel, Galvabond, marine grade aluminium, stainless steel or fibre glass. The most cost effective solution to avoid corrosion and early maintenance costs can be recommended. The base arrangement varies depending on the application and whether oil containment is required. Many HV and LV connection and switchgear arrangements are available and include:
HV direct or loop connected with and without fusing on the transformer Various types of air, oil and SF6 HV switchgear configurations LV direct connect Fused LV boards with transformer isolators and DIN or BS fusing Circuit breakers and/or or isolator boards for heavier current applications.