Lightning is one of the most serious natural disasters in nature.
A strong current flows through a lightning strike.
The resulting mechanical force and thermal effect will seriously damage buildings.
And electrical equipment, and even cause personal injury or death.
Therefore, the lightning protection and grounding project is a top priority related to building and personal safety.
Lightning protection grounding refers to an integrated system that intercepts, guides, and finally releases lightning current into the ground.
To prevent direct lightning strikes or lightning pulses. Protection technology to avoid damage to the building itself or its internal equipment.
The effective grounding is to shunt and release the electromagnetic interference of direct lightning and induction lightning.
The grounding device is an important part of the lightning protection device.
It limits the ground voltage of the lightning protection device from being too high by discharging current to the ground.
The grounding device is mainly composed of three parts:
- Lightning receiving device
- Grounding wire
- Grounding device
Among them, the performance of the grounding wire and the grounding device directly affects the quality of lightning protection.
In previous lightning protection projects, the grounding bodies and grounding wires were generally made of steel.
In the construction process of the grounding system, we need a lot of trenches.
However, due to the following reasons, the corresponding national agencies have strict requirements on the grounding resistance in the construction of the grounding system.
First, but with the progress of urbanization in various parts of our country.
Second, in order to ensure the normal operation of the city.
Third, each region has strict restrictions on the excavation of urban roads and the like.
At the same time, in order to ensure the normal operation of the power supply and distribution system in the thunderstorm season.
However, this has brought a lot of trouble to the construction of the grounding system.
In order to alleviate the contradiction between the two, we need a more reasonable and effective grounding system construction architecture.
Next, let’s analyze the difference between the traditional grounding system and the copper-clad steel grounding system.
|Comparison||Traditional Grounding System||Copper Clad Steel Grounding System|
|Project costs||The cost of steel is low, but the construction cost is high||The cost of copper-clad steel is higher, but the construction cost is lower|
|Grounding material||Steel||Copper Clad Steel|
|Connection method||Electric welding: bad welding quality。||Exothermic welding: good welding quality|
|Conductivity||Conductivity is not high。||Conductivity is very good, four times that of steel.|
|Anti-corrosion||Steel: 3-5 years|
Galvanized steel: 6-8 years
|Copper Clad Steel: more than 30 years|
|Grounding effect||Unstable performance, high ground resistance.||Stable performance and stable grounding resistance.|
|Service life||5-7 years||more than 40 years|
To sum up, in modern lightning protection grounding projects, copper-clad steel is used as the grounding body and grounding wire in lightning protection grounding projects.
Not only can greatly improve the lightning protection effect, but also save labor costs.
At the same time, the daily maintenance labor is reduced.