In circuit systems, grounding wires are very necessary. So, what is the function of a grounding wire? Below, the editor of graphite grounding will introduce the function of grounding wire.

Shelter grounding

Shelter grounding is a protective assembly set up to prevent insulation damage from causing equipment to be electrified and endangering personal safety. It has two methods: grounding and grounding. According to the electricity regulations, for systems that use three-phase four wire power supply, the neutral wire should be grounded, so the neutral wire method should be adopted. The metal casing of the equipment should be connected to the neutral wire through a process conductor, and direct grounding of the equipment casing is not allowed. This is the switch equipment in the distribution room of the broadcasting and television system, including the intermediate air conditioning unit

transmitter

power supply

It is particularly common in switchgear and high power consuming equipment. When planning, the grounding bus should be led from the grounding grid to each equipment, and then the rigid shell should be connected to the grounding bus with a conductor. It is worth noting that the grounding wire should be connected to the grounding common terminal of the equipment, and the other end is best welded.

Accidentally, the equipment shell may become numb to the touch, which is caused by the exchange of leaked electricity and the equipment shell not being connected to zero. Generally, you can unplug the power plug and change the position of the grounding wire before inserting it. In some frequently moved recording equipment, due to the negligence of connecting the neutral line, some operators may use both hands to fight with and without neutral equipment, which may cause the above phenomenon.

Overvoltage protection grounding is a grounding protection assembly designed to prevent lightning strikes. The most commonly used lightning protection devices are lightning rods and lightning arresters. The lightning rod enters the ground through the steel bars of the process tower or building, while the lightning arrester enters the ground through the process common ground wire. Lightning arresters must be inspected before the arrival of the lightning and drought season every year to prevent them from becoming effective. If our hotline's Delufeng connector is struck by lightning, it is because of the telephone line

surge arrester

Effective now. Never connect the grounding wires of other equipment on the lightning protection down conductor. The lightning protection down conductor can only enter the ground directly, otherwise lightning will damage other equipment through the down conductor. If a satellite TV receiver has been struck by lightning several times, the original cause was the insulation damage caused by friction between the feeder and the metal guardrail on the roof. The metal guardrail was welded to the lower body of the lightning rod, causing lightning to enter and damage the receiver.

Barrier area

A protective step of grounding the metal outer skin of visual and audio lines, the metal shell of electronic equipment, the barrier cover, and the metal barrier network of buildings (such as barrier rooms for measuring activity, selectivity, and other targets) to prevent electromagnetic sensing. Among all grounding methods, barrier grounding is the most complex, with a feeling of indescribable and unclear. Due to the barrier's ability to prevent external disturbances and its potential to cause disturbances to the outside world, electromagnetic disturbances must also be prevented between various components within the equipment.

Flag and signal ground

All types of electronic circuits have a reference potential point, which is the signal ground. Its effect is to ensure that the circuit has a common reference potential, so as not to float and cause signal deviation.

The connection between the signal output terminal and the signal input terminal of the same equipment cannot be connected together, but should be separated; The input ground of the preceding stage (equipment) only needs to be connected to the output ground of the succeeding stage (equipment). Otherwise, the signal may form feedback through the process ground wire, causing the signal to float. In the testing of equipment, the adjacency of the signal ground requires special attention to detail.

The above is the introduction made by the editor of graphite grounding about the role of grounding wire.