Views: 8245 Author: Site Editor Publish Time: 2020-06-18 Origin: Site
During the hydropower renovation, the decoration master will ground the line, but many people do not understand what this line is. In order to save money, sometimes the ground line is saved. This is clearly incorrect. In this article we will understand what a ground wire is and why it is important.
The ground wire is the wire directly connected to the earth, which can also be called the safety circuit wire. When it is dangerous, it directly passes the high voltage to the earth, which is regarded as a lifeline.
Due to poor insulation performance or wet environment, household appliances will cause a certain static electricity in their housings, and serious electric shocks will occur. In order to avoid accidents, a wire can be connected to the metal casing of the appliance, and the other end of the wire should be connected to the ground. Once the appliance has a leakage, the ground wire will bring static electricity into the ground and release it. In addition, when electrical appliance maintenance personnel use an electric soldering iron to solder the circuit, sometimes the electrical circuit in the electric appliance is damaged due to the electric charge of the electric soldering iron, which is more important. Friends who use computers sometimes ignore the grounding of the mainframe. In fact, connecting a ground wire to the mainframe of the computer can prevent the occurrence of crashes to a certain extent.
Ground wire in the power system: it is an important tool to ensure workers when unexpected voltages occur on the equipment and lines that have been powered off. According to ministerial regulations, the ground wire must be made of bare copper flexible wire with a diameter of 25mm 2 or more.
In electrical appliances, the ground wire is a line that is connected to the electrical equipment shell and other parts in time, to lead out unsafe electric charges or leakage current due to various reasons.
The role of the high-voltage grounding line: the high-voltage grounding line is used for line and substation construction, in order to prevent the electrostatic induction of the nearby charged body from causing electric shock or mis-closing to ensure safety.
High-voltage grounding wire structure: portable high-voltage grounding wire consists of insulated operating rod, wire clamp, short-circuit wire, ground wire, ground terminal, bus clamp, and ground clamp.
High-voltage grounding wire manufacturing process: excellent manufacturing process-the wire clamp and grounding clamp are made of high-quality aluminum alloy die-casting; the operating rod is made of epoxy resin colored tube, which has good insulation performance, high strength, light weight, bright colors and smooth appearance. The soft copper wire is twisted with multiple high-quality soft copper wires and covered with a soft, high-temperature-resistant transparent insulation coating, which can prevent the wear of the grounded copper wire during use. The copper wire meets the fatigue test requirements and ensures operators safety in operation.
Grounding wire specifications: according to the regulations of the Ministry, the grounding wire must be made of bare copper flexible wire with a diameter of 25mm 2 or more.
The components of the grounding method can be divided into two parts: electrical equipment and power distribution system. The grounding part of electrical equipment includes a grounding body, an exposed conductive part, a main ground terminal board, a protective wire (PE), a ground wire, and an equipotential bonding. Ground wire connects the main ground terminal board or the exposed conductive part directly to the protective wire of the ground body. The ground wire that connects multiple ground terminal boards is called the ground trunk. The grounding part of the power distribution system is the phase (L), neutral (N), protective neutral (PEN) and power ground points.
A terminal is an accessory product used to achieve electrical connections, and is industrially divided into the category of connectors. The terminal is used to facilitate the connection of the wires. It is actually a piece of metal sheet enclosed in an insulating plastic. There are holes at both ends to insert the wires and screws for fastening or loosening. For example, two wires sometimes need to be connected and sometimes need to be disconnected. At this time, they can be connected with terminals and can be disconnected at any time without having to weld or entangle them, which is very convenient and quick. And it is suitable for a large number of wire interconnections. In the power industry, there are special terminal blocks, terminal boxes, all of which are terminal blocks, single-layer, double-layer, current, voltage, ordinary, breakable and so on. A certain crimping area is to ensure reliable contact and to ensure sufficient current can be passed.
The terminal classification can be roughly divided into the following categories: plug-in type, fence type, spring type, rail installation, rail type, through-wall type, WMSTB, insurance terminal, test terminal, universal type. As a kind of connector, a terminal is an important component in the electrical industry. It plays an irreplaceable and non-negligible role, because engineers and technicians first check from the interface when repairing, that is, starting with the terminal. Therefore, the design of the terminal is particularly important.
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