Zambia 35kV-500kV open substation generally consists of high-voltage equipment substation, low-voltage equipment substation, the main transformer, 35kV distribution area (room), 10kV distribution room, ancillary facilities (garage, warehouse, gatehouse, pools, etc.), cable trench, independent lightning rods, building, control room (part of the substation control room and the comprehensive building is called the main control building) and other components.

Substation grounding is mainly divided into three parts: primary grounding, secondary grounding and lightning grounding (anti-static grounding belongs to the secondary grounding part).

Primary grounding network consists of horizontal grounding main network (grid composed of horizontal grounding pole), vertical grounding pole and structural equipment grounding lead wire. Structural equipment grounding lead is divided into two parts: above ground and underground. The secondary grounding mainly includes equalization of the indoor part and the grounding of the control room panel. The broad secondary grounding also includes the equalization conductor in the cable trench, also known as the open grounding trunk, which is connected to the indoor grounding network through the cable shaft.

Lightning protection grounding includes the centralized grounding device of the lightning protection belt, lightning rods and independent lightning rods of the main control building and other buildings. Lightning rod grounding and the main grounding network is too close. It is only necessary to lay a sufficiently close grounding pole at the corresponding location and increase the vertical grounding pole.