EARTHING OF STEEL REINFORCED CONCRETE POLES

1. Заземление на стоманобетонни стълбове, при което в единия край на стълба е разположена първа планка, а в другия му край, над повърхността на земята, е разположена втора планка, свързана с арматурата към първата планка, характеризиращо се с това, че под втората планка (3) на стълба е разположен пръстен с конична форма (1), свързан към арматуратана стълба. Earthing is used in civil engineering, the extension and repairs of electric distribution LV networks. Earthing itself is performed simultaneously with the erection of the pole thus eliminating any need for mounting of separate earthing and its supervision during the operation of the electrical network. As the pole is mounted sufficiently deep in the ground, the problem of earthing the electrical network is solved as from the time of its making and erection. In this way it is safe and lasting, and economy is made of labour, time and materials. Earthing consists of one or several rings at some distance between, fixed by welding to a rod of the RC network of the pole by means of a plate. Galvanized plate for connection to the neuter wire of the network and the earthing is welded to the upper part of the steel rod before centrifuging, or vibration, respectively.