Description
UZZ should be installed in areas of hazardous influence of alternating current sources from overhead and cable power lines with a voltage of 110 kV and above, as well as AC electrified railways, namely:
- where the pipeline runs parallel to overhead lines (OHL), cable lines (CL), and AC electrified railways;
- at pipeline crossings with OHL, CL, and AC electrified railways;
- at locations where pipelines approach or diverge from OHL, CL, and AC electrified railways.
The grounding device consists of horizontal and vertical grounding electrodes or a combination of both.
The horizontal grounding electrode consists of interconnected galvanized steel strips (sections) (40×4 mm, length 2 meters) laid in a line.
The vertical grounding electrode consists of interconnected galvanized steel rods (sections) (Ø16 mm, length 1.5 meters).
At the Customer’s request, the grounding device may be made of stainless steel.
The number of vertical grounding electrodes, as well as the number of sections in each, is determined by the design documentation.
