Lightning protection grounding
resistance reducing material
Address: Wuluohou Industrial Zone, Weicun Town, Qingyuan District, Baoding City, Hebei Province
The copper-clad steel strand is made of a certain number of copper-clad steel single wires.
Copper-clad steel, as its name implies, is a copper-clad steel wire, so it is a composite wire with a copper layer wrapped around the steel wire. It uses the skin effect of low-voltage and high-frequency signals to walk along the surface in the high-frequency area. Signals in a certain frequency range can be guaranteed to be transmitted. Copper plays a role in conducting weak electrical signals, while steel wires play a supporting role. According to the different methods of copper coating to steel wire, it is mainly divided into electroplating, coating, hot casting/dipping and electroforming. The product not only has the strength and toughness of steel, but also has the good electrical conductivity and corrosion resistance of copper. Compared with copper single wire, it has the advantages of low density, high strength and low cost. It is an updated product of traditional pure copper single wire. 
Military coated wire conductors; electric power industry ground rods; braided shielded wires of power cables; connectors of various electronic components; reinforced conductive cores of special cables; overhead wires for power transmission and telephone lines; parallel twin-core telephone user communication lines Conductor; Electrified railway, rail transit line bearing cable and sliding contact line; Cable TV subscriber line and entrance line coaxial cable inner conductor material; Computer LAN, access network cable, field cable inner conductor material
Common specifications and models:
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Reference weight( kg/km )
Scope of application
Copper-clad steel stranded wire is widely used in lightning protection grounding, anti-static grounding, protective grounding, power and petrochemical system grounding in high-frequency coaxial cables, steel network communications, electrified railways, subway light rail, railways, airports, network communications and other places Line etc. Compared with copper stranded wire, it has the advantages of low density, high strength and low cost. It is an updated product of traditional pure copper stranded wire. [1-2]
Identification of Copper Clad Steel Stranded Wire
To identify the copper-clad steel stranded wire, you must first understand its internal structure. Because the copper layer is coated on the outside, it is difficult to identify the quality with the naked eye, but special testing equipment can be used to detect the conductivity and the thickness of the copper layer. 
Measures for Copper Clad Steel Stranded Wire
In order to prevent electromagnetic induction, the power cord and signal line of the camera along the pole should be passed through the metal pipe to achieve the shielding effect, and both ends of the shielding metal pipe should be grounded. To prevent lightning waves from invading the front-end equipment along the line, Install suitable lightning arresters on each line before, such as power line (DC24V or 220V), video line, signal line and pan/tilt control line. The signal line has a long transmission distance, low voltage resistance, and is easily damaged by lightning current. For equipment, in order to transfer the lightning current from the signal transmission line to the ground, the signal overvoltage protector must respond quickly. The actual situation must be considered when designing the protection of the signal transmission line, according to the signal transmission rate, signal level, starting voltage and lightning flux Select the correct lightning protection equipment and other parameters. Front-end equipment such as the camera should be placed within the effective protection range of the lightning rod (lightning rod or other lightning conductor). When the camera is set up independently, in principle, to prevent lightning rods and down conductors The lightning rod is 3 to 4 meters away from the camera. If it is difficult, the lightning rod can also be erected on the support pole of the camera. The down conductor can directly use the metal pole itself or choose Φ 8 galvanized round steel.
How to connect copper clad steel strand and copper clad steel ground electrode
First, install the copper-clad steel grounding electrode according to the design drawings. The distance between the copper-clad steel grounding electrodes must be arranged in strict accordance with the requirements. The tails of the copper-clad steel grounding electrodes that are driven into the ground should be generally high without too much difference. The copper-clad steel ground electrode is laid with copper-clad steel stranded wire. After all preparations are completed, the connection between the copper-clad steel ground electrode and the copper-clad steel strand is started. The next step is to prepare for the connection. First, prepare the exothermic welding mold, solder powder, ignition gun, cleaning brush, and all appliances. When ready, start cleaning the copper clad steel strand and the copper clad steel ground electrode. Pollutants.
The connection adopts high-temperature exothermic welding, and the solder powder adopts the high-purity exothermic solder powder produced by Baoding Changdi Electric Power Equipment Manufacturing Co., Ltd. The high-purity exothermic solder powder has no residues and will not appear corrosive. The surface copper layer is thicker (average thickness is greater than 0.3mm) and has strong corrosion resistance, long service life (more than 30 years) and maintenance-free.
How to re-check copper clad steel strand
In order to prevent the copper-clad steel stranded wire from generating overvoltage due to lightning strikes, the power supply continues to push a larger current into the short-circuit point, resulting in high heat and fire. This kind of accident can usually be avoided by a thermal fusion point in series with the varistor. The thermal fusion joint should have a good thermal coupling with the resistor body, and it will not be disconnected when the impact current flows, but it will be disconnected when the temperature exceeds the upper limit working temperature of the resistor body. The research results show that if the varistor has manufacturing defects, it is prone to early failure. The multiple effects of low-strength electric shocks will also accelerate the aging process and make the aging failure appear early.
Copper-clad steel strands, like selenium photovoltaic cells, have a very limited ability to handle surges. The insulation level of various equipment should be able to meet the insulation requirements of the voltage for the equipment, and the equipment should be strictly checked during the ordering and factory test of the equipment. When the surge is large, the insulation withstand voltage level of the equipment should be ensured in accordance with the requirements of the regulations and the building’s own protection The lightning performance directly affects the lightning protection of the internal electrical equipment, so first of all, we must pay attention to the lightning protection of the building itself. To prevent lightning damage. The lightning protection device of the building itself is a barrier for the lightning protection of the electrical equipment and systems in the building, and only the varistor really plays a role.
Copper clad steel strand installation height
The copper-clad steel strand has not undergone proper line attenuation. Because it is relatively sharp, that is, the area of the two-electrode plates of the capacitor is small, and the capacitance is also small, which means that it can hold very little charge. And it accumulates most of the electric charge, so when there are more electric charges on the cloud layer, the air between the lightning rod and the cloud layer is easily broken down and becomes a conductor. In this way, the charged clouds form a path with the lightning rod, and the lightning rod is grounded. Lightning rods can lead the charge on the clouds to the ground so that it does not pose a danger to high-rise buildings.
The protection level of copper-clad steel strands does not match. It must exceed the high point of the house. The general arrangement is to surround the roof with steel bars. For example, only a 20kV line is used for lightning protection, and the four corners are erected. A 1 to 2 meter steel bar is connected to the ground on the side where no one goes in and out, and an iron plate of about one square meter is welded at the grounding position. The lightning wave invades more than 60kV, and the result is that the lightning protector is damaged and buried in the ground. This is definitely safe. The lightning rod accumulates most of the charge. The lightning rod and these charged clouds form a capacitor, and the lightning protection measures that cannot play a protective role have no practical effect. To ensure its safety.