We all know that the conventional grounding system is divided into two types: grounding wire and ground electrode. What is the difference between the two? What are the characteristics of using them for grounding? Let us learn together.
The ground wire is a connecting wire that connects current or voltage to the grounding grid, or a conductor that connects the ground electrode into a whole. The ground electrode is a discharge channel that connects current or voltage to the earth. In order to reduce the grounding resistance, the electrodes that form the grounding network are usually used in groups. The grounding of the ground wire actually constitutes a loop, but if the contact is poor, the electrical appliance will not work properly and it is easy to cause electric shock. Therefore, the neutral wire should be used to form the loop. The end of the neutral wire is on the transformer side, which is actually grounded, but its grounding It is guaranteed, so generally only the ground wire is used to prevent electrification of the equipment shell and electric shock, and the neutral wire is used to form a working circuit.
The ground electrode has parallel and vertical ground electrodes, a section of angle steel or flat steel buried in the ground. The earth ground wire is not necessarily vertical. Just like the upper part of the grounding busbar of the concrete pole is at the bottom of the concrete pole, there is a bolt fixed to the connecting line, and the lower end is welded to the grounding pole, part is vertical, part is parallel, and there is also a bent part.
The summary is that the grounding pole is a point where lightning leaks (into) the earth; the grounding wire is a line, and the channel that the lightning current leaks into the earth, which is the same as the electric current channel of wire and cable. The lightning is led into the ground through the lightning protection grounding material process: the lightning passes through the lightning rod, the air-termination device, the down conductor, the ground bus, and the ground electrode, and finally flows into the earth.
Floor 8, No.8 Shunye Street, Zhenhai District, Ningbo 315202,China