Communication, Mobile Base Station, Network Room

Successful Cases of Copper Clad Ground Wire in Communication, Mobile Base Station, Network Room

Case	Relation products
China telecom of Nanchan	Chemical ground rod, welding powder, resistrance reducing agent
China Mobile Communications GroupNanchang branch	Chemical ground rod, welding powder, resistrance reducing agent
China Mobile Communications GroupGuangdong branch	Chemical ground rod, welding powder, resistrance reducing agent
Gantong Communication Co., Ltd.	Chemical ground rod, welding powder, resistrance reducing agent
Hangzhou Tianhong Communication Co.,Ltd	Copper bonded ground rod, welding powder, resistrance reducing agent
Rectification of communication room in Beilun Power Plant	Copper bonded ground rod, welding powder, resistrance reducing agent

Grounding range in mobile base station

The following parts of the communication equipment should be grounded with copperweld ground rod.
(1) DC power supply, communication equipment rack, housing, metal sheath or shield of the incoming communication cable.
(2) AC distribution panels, rectifier panels and other power supply equipment exposed conductive parts.
(3) the exposed conductive part of the DC power distribution screen.
(4) AC and DC dual-use communication equipment rack, frame and rack frame is not insulated from the exposed conductive part of the power supply rectifier plate.
(5) cables, overhead lines and related parts need to be grounded.
(6) metal wire frame and battery rack and other exposed conductive parts.

The role of positive or negative grounding of the communication station battery pack

Before the adoption of electronic components in modern switches, a large number of relay components were used. In order to protect the normal durable use of relays, artificial telephone bureau or carrier use of various voltage levels of the battery pack are positive grounding, the purpose is to reduce the effect of galvanic corrosion due to poor insulation of the relay coil or cable metal sheath, so that the damage to the relay and cable metal sheath is reduced.

Functions of communication grounding of copper clad steel grounding conductor

(1) In the telephone call circuit, the positive pole of the battery pack is grounded to reduce the crosstalk caused by poor insulation of the user line to ground
The lowering of the insulation resistance of the user line to ground may cause crosstalk, and a large number of user lines in a telephone bureau due to moisture or other reasons, so that the insulation resistance to ground is reduced is often occurring, and sometimes there are multiple user lines at the same time to ground the lowered insulation resistance. By grounding one pole of the battery bank of the telephone office, part of the leaked voice will flow through the soil to the ground pole of the battery, thus reducing the crosstalk level, and the degree of reduction depends on the effect of grounding and the resistivity of the soil.
According to several investigations, if the grounding resistance of the positive pole of the battery pack is lower than 20W, it is possible to keep the crosstalk within the appropriate limit; however, this limit cannot be taken as a universally tolerated value, because it varies with different telephone systems and also depends on the capacity of the line, insulation standards, etc.
(2) In the telephone and public telegraph communication circuit, the use of earth to complete the communication signal circuit
In communications engineering, a common earth circuit is often used as a single-line circuit for signal circuits. All grounded parts are connected to each other to form a network with low impedance, and the potential difference between direct current and alternating current in the earth is small and suitable as a reference potential plane. In the surroundings between communication equipment installed in different geographical locations, it is necessary to use the earth as a stable reference potential in order to act as an earth loop and prevent galvanic corrosion. Of course, since the earth is used as a common circuit, there is also the possibility of interference, especially from power circuits.

Definition of joint grounding

The different grounding methods of various types of communication equipment of communication stations, including the working grounding of communication equipment, protective grounding, shield grounding, anti-static grounding, information equipment logical ground and building metal components and each part of the lightning protection device, lightning protector protection grounding connected together, and with the building lightning protection grounding common grounding of the building's foundation grounding body and peripheral grounding system grounding method. The so-called joint grounding can also become public grounding.
Joint grounding is the basic measure to realize the equal pressure equipotential of the communication station. The meaning of joint grounding is the foundation grounding body and other special grounding body of each building in the communication station form a common ground network with each other, building lightning protection grounding and indoor grounding system are led by a common ground network. At the same time the building electronic equipment protection grounding, logic grounding, shielding grounding, anti-static grounding, etc. share a set of grounding system, the bureau of each switch power supply work ground also to connect with the copper clad steel grounding conductor of grounding system to obtain the same potential reference point.

Composition of joint grounding system

For the communication grounding system with copper bonded steel conductor, generally by the "earth", grounding body, grounding wire and so on. For the communication station grounding system, that is, the joint grounding system, in addition to the grounding body, grounding introduction line, should also include different levels of grounding convergence line and grounding wire, etc. composed of.
The "earth" refers to the grounding body contact soil. Soil conductivity is a basic physical properties of the soil, any point can be seen as zero potential. The electrical conductivity of the soil is determined by the resistivity of the soil.
The "grounding body" is also called the ground electrode. For the purpose of connection to the ground, a conductor or group of conductors that are in close contact with the soil and provide an electrical connection to the soil is called a grounding body. Grounding body generally use galvanized angle, steel, flat steel and other metal materials, special circumstances can use steel or copper plate, etc..
The "grounding conductor" is also called the grounding conductor. In the system, device or equipment at a given point and the grounding pole or grounding network between the conductor to provide a conductive path or part of the conductive path.
"Grounding wire" is divided into vertical grounding wire and horizontal grounding wire.
The "grounding line" is referred to as the ground wire. Mainly refers to the grounding end of the system or equipment to the sink connection wire. The connection point of both ends of the grounding line should ensure good electrical contact, and should be anti-corrosion treatment.