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The tower crane is a metal component. It is only necessary to connect the tower crane on the ground at the exit point of the construction foundation, and then dismantle it after completion of the construction. Tower grounding techniques include tower crane foundation grounding, tower crane repeated grounding and lightning protection grounding. The following is a detailed introduction:

Tower grounding techniques 1: Tower Crane Foundation Grounding Method

1. Dig a circular trench (60-80 cm deep and 60 cm wide) around the tower crane foundation at a distance of about 1 meter.
2. (Horizontal grounding body) A circle of galvanized flat steel is enclosed in the trench.
3. (Vertical grounding body) Put a grounding rod into the trench every 2.5-3 meters, and weld the top with flat steel.
4. No less than 2 points of flat steel are welded to the foundation.

Tower grounding techniques 2: Tower Crane Repeated Grounding and Lightning Protection Grounding Method

1.Flash receiving: The tower crane is generally located on the outside of the building, and higher than the building under construction. Because its main body is mostly steel structure, it can use itself as a flash receiving device.
2. Lightning-proof lead-down line: The main body is also steel structure, and can use itself as lead-down line (of course, it is best to set up two lead-down lines which is not less than 50 square).
3. Grounding: Connect the base or track with the grounding grid of the building foundation reliably and form an equipotential body. It is better to install three centralized divergent vertical grounding bodies near the tower crane foundation, and the grounding resistance is not more than 10 ohms.
4. Some tower cranes will be fixed with staircase hoops. At this time, the hoops should be reliably welded with the pressure equalizing ring of the floor.

Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd located in Ningbo, Zhejiang, it is a professional enterprice, who focus on R&D, production, sales copper clad steel series grounding and copperweld ground rod products.

Points for Attention in Design of Tank Grounding System in Gas Station:

1. Oil tanks should be lightning-proof grounding, and grounding points should not be less than two.

2. The buried oil tank should be electrically connected with the process pipeline exposed to the ground and it should be grounded.

3. The information system of gas station should be equipped with armoured copper earthing cable or wire through steel pipe. Both ends of the metal skin of the distribution cable and the protective steel pipe should be grounded.

4. The joint grounding device of anti-static electricity and Anti-induction lightning should be installed at the beginning, end and branch of oil pipeline laid on the ground or pipe trench, and its grounding resistance should not be greater than 30 Ω.

5. Anti-static grounding device for unloading of petrol tanker should be installed in unloading site of petrol tanker station, and electrostatic grounding instrument should be installed to detect cross-connection and monitor the status of grounding device.

6. Metal wires should be used to connect flanges and rubber pipes in explosive dangerous areas. When the connecting bolts of flanges are not less than 5, they can not be spanned in non-corrosive environment.

7. The grounding resistance of anti-static grounding device should not be greater than 100 Ω.

8. Lightning belts (nets) should be used to protect gas stations from direct lightning strikes when buildings such as station buildings and shelters need to be protected.

9. Overvoltage (surge) protectors corresponding to the withstand voltage level of electronic devices should be installed when the head and end of distribution line of gas station information system are connected with electronic devices.

10. 380/220V power supply and distribution system should adopt TN-S system, and both ends of cable metal cover or cable metal protective tube of power supply system should be grounded. Overvoltage (surge) protectors should be installed at the power supply end of the power supply and distribution system in accordance with the voltage withstanding level of the equipment.

There are four common electrical grounding methods:

1.Working Grounding

Working grounding, also known as system grounding, is grounding a certain point of the network according to the needs of the normal operation of the power system. For example, the neutral point of three-phase system is grounded to stabilize the potential of the grid to the ground, thus reducing the insulation to the ground. It can also make the flashover or breakdown of ground insulation easy to detect, and is conducive to the implementation of relay protection measures.

2. Protective grounding

Protective grounding is also called safe grounding. The metal case of electrical devices, the structure of distribution devices and the tower of transmission lines may be charged due to insulation damage. The grounding is set up to prevent it from endangering the safety of people and equipment.

3. Lightning Protection and Grounding

This is to make the strong lightning current safely into the ground, to reduce the potential rise caused by the outdated lightning current, such as lightning rod, lightning wire and arrester grounding.

4.Antistatic Grounding

Grounding is designed to prevent the dangerous effects of static electricity on flammable and explosive substances such as flammable oil, natural gas storage tanks and pipelines.

Generally speaking, the function of grounding can be divided into two parts: The one protecting personnel and equipment from damage is called protective grounding; The one ensuring the normal operation of equipment is called working grounding. The classification here refers to various requirements considered in the design and construction of grounding engineering, and does not mean that each "ground" needs to be separated. On the contrary, in addition to the special reasons such as anti-interference of geoelectric signals and special requirements of equipment itself, we advocate the joint grounding scheme as far as possible.

Beisuda located in Ningbo, Zhejiang, it is a professional enterprice, who focus on R&D, production, sales copper clad steel series grounding and copper clad rod products.

Classification of Equipment Grounding

Earthing refers to the connection between neutral points of power system and electrical devices, exposed conductive part of electrical equipment and outer conductive part of equipment. Equipment grounding can be divided into working grounding, lightning protection grounding and protective grounding.

Protective grounding is designed to prevent equipment from being charged due to insulation damage which endangers personal safety, such as metal enclosures, reinforced concrete poles and metal poles and towers of power equipment. Protective grounding can only have current when the insulation of the equipment is damaged, and its value can be changed in a large range.

Function of Equipment Grounding

1. Preventing Persons from Being Shocked by Electric Shocks

In order to protect the safety of human body, a good metal connection is made between the non-electrified metal part of electrical equipment and the grounding electrode under normal conditions. For electrical equipment with grounding devices, when insulation is damaged and the housing is charged, the grounding current will flow along both the grounding electrode and the human body.

The current flowing through each path will be inversely proportional to its resistance. The smaller the resistance of the grounding pole, the smaller the current flowing through the human body. When the grounding resistance is very small, the current flowing through the human body tends to be zero. The human body therefore avoids the danger of electric shock. Therefore, in any case, the grounding resistance should be guaranteed not to exceed the grounding resistance specified in the design or regulation.

2.Guarantee the Normal Operation of Electrical System

The grounding of power system is generally neutral point grounding, so the potential between neutral point and ground is close to zero. When the phase line touches the shell or grounding, the other two relative ground voltages will rise to twice the phase voltage in the neutral point insulation system. In neutral grounded systems, it is close to the phase voltage. Because of the neutral grounding wire, the reliability of relay protection can be guaranteed.

DC power supply in communication system usually adopts positive grounding, which can prevent noise from entering and ensure the normal operation of communication equipment.

Beisuda located in Ningbo, Zhejiang, it is a professional enterprice, who focus on R&D, production, sales copper clad steel series grounding and copper clad earth rod products.

Exothermic Welding Products

Exothermic welding, also called hot melt welding, fire-clay welding, thermite welding and explosion welding, is a high-heat principle that utilizes the redox reaction between metals, the operation of which is simple, easy to learn, safe and efficient, and it has significant results in the production of high quality permanent welded joints between homogeneous metals and metals of different materials and is now well known to the public, becoming more popular in more and more architectural designs, and widely required to replace the connection method using conventional metal fixtures.

Exothermic Welding Supplies require high-quality graphite to form a cavity mold with a certain shape, such as line style (butt), T-joint (three-way), cross-type joint (four-way) and so on. The mold can be used multiple times, effectively saving costs.

Exothermic Welding Advantanges:

1. Good electrical conductivity: the current-carrying capacity of the welded joint surface is almost the same as that of the metal conductor, and the electrical conductivity is strong.

Experiments have shown that the the change rate of DC resistance before and after welding is close to zero, which is incomparable with any traditional connection mode.

2. Long and durable life: due to the high temperature fusion between the metal conductors during exothermic welding, an integrated permanent joint is formed, which is very strong and difficult to break and damage.
3. Strong corrosion resistance: the material of the welded point is mainly copper, and the corrosion resistance is almost the same as that of copper.
4. The operation is convenient and simple with no need for professionals but can be performed only after pepole are simply trained by professionals.
5. The requirement for operating environment is low, and no external power source or heat source is required for welding.

Operation flow of hot-melt welding

1. First, the mold and the welded conductor joint should be cleaned, and then the welded conductor should be fixed at the center of the mold cavity.
2. Close the mold and steadily place a metal protective gasket on the bottom of the mold furnace.
3. Pour in the exothermic welding flux, and evenly spread the starting powder on the surface of the flux and place it in an environmentally friendly starting powder.
4. Cover the mold, expose a part of the pyrophoric wrap at the mold opening, and then ignite the starting powder with an igniter.
5. After the hot-melt flux is ignited, a high temperature reaction occurs in the mold.
6. After the reaction is completed and cooled, the mold is opened and the welded conductor has been permanently connected.

Exothermic Welding for Grounding Precautions Flammable and explosive articles shall not be placed within 2 meters of the site during construction operation. Unrelated personnel shall not stay and operators must wear heat insulation gloves and related protective equipment.

Zhejiang, it is a professional enterprice, who focus on production and sales of copper clad earth rod. We welcome merchants from all over the world to cooperate with our factory for mutual benefit and win-win, and jointly create a better future.

Copper clad ground wire is a new material developed by Ningbo Zhenhai Beisuda Petrochemical Equipment Co.,Ltd. to replace pure copper. Copper-clad copperweld steel copper clad rod has the following advantages:

With high strength

With low price

High corrosion resistance

High electrical conductivity of copper

APPLICATIONS OF CCS GROUNDING GROUND CONDUCTORS

In recent years, the copper coated grounding wire has been widely applied to UHV lines, petrochemicals, nuclear power, high-speed rail, especially key projects. Copper-clad steel: A material in which the surface of a steel core is uniformly coated with copper, including copper-clad steel bars (for vertical grounding only), copper-clad steel flat steel, and copper-clad steel wire (including copper-clad steel round wire and copper-clad steel stranded wire).

Exothermic welding, also called hot melt welding, fire-clay welding, thermite welding and explosion welding, is a high-heat principle that utilizes the redox reaction between metals, the operation of which is simple, easy to learn, safe and efficient, and it has significant results in the production of high quality permanent welded joints between homogeneous metals and metals of different materials and is now well known to the public, becoming more popular in more and more architectural designs, and widely required to replace the connection method using conventional metal fixtures.

Exothermic welding products require high-quality graphite to form a cavity mold with a certain shape, such as line style (butt), T-joint (three-way), cross-type joint (four-way) and so on. The mold can be used multiple times, effectively saving costs.

Exothermic Welding Advantanges:

1. Good electrical conductivity: the current-carrying capacity of the welded joint surface is almost the same as that of the metal conductor, and the electrical conductivity is strong.

Experiments have shown that the the change rate of DC resistance before and after welding is close to zero, which is incomparable with any traditional connection mode.

2. Long and durable life: due to the high temperature fusion between the metal conductors during exothermic welding, an integrated permanent joint is formed, which is very strong and difficult to break and damage.
3. Strong corrosion resistance: the material of the welded point is mainly copper, and the corrosion resistance is almost the same as that of copper.
4. The operation is convenient and simple with no need for professionals but can be performed only after pepole are simply trained by professionals.
5. The requirement for operating environment is low, and no external power source or heat source is required for welding.

Operation flow of hot-melt welding

1. First, the mold and the copper clad steel groundingshould be cleaned, and then the welded conductor should be fixed at the center of the mold cavity.
2. Close the mold and steadily place a metal protective gasket on the bottom of the mold furnace.
3. Pour in the exothermic welding flux, and evenly spread the starting powder on the surface of the flux and place it in an environmentally friendly starting powder.
4. Cover the mold, expose a part of the pyrophoric wrap at the mold opening, and then ignite the starting powder with an igniter.
5. After the hot-melt flux is ignited, a high temperature reaction occurs in the mold.
6. After the reaction is completed and cooled, the mold is opened and the welded conductor has been permanently connected.

Welding For Grounding Precautions Flammable and explosive articles shall not be placed within 2 meters of the site during construction operation. Unrelated personnel shall not stay and operators must wear heat insulation gloves and related protective equipment.

We can provide you various exothermic welding supplies, RFQ today!

Performance characteristics and working principle of Chemical Ground Electrode:

1. Chemical ground electrode
2. Existing soil
3. Special filler
4. Ions diffuse around
5. Expand the conductive range of the soil

installation earth electrode is a new type of grounding system suitable for all kinds of places with high grounding requirements and difficult grounding engineering.

The chemial grounding electrode system  consists of advanced alloy compounds, with a copper tube on the outside to ensure maximum conductivity and long service life. The filling material inside the conductor contains special ionic compounds, which can absorb moisture in the air adequately. Active ions can be effectively released into the soil through the deliquescence, and interact with the moisture in the soil and air to further promote the external slow release and drag reduction of conductors, and to maintain the long-term stability of the resistance value. Compounds in conductors are gradually combined in colloidal transparency over time.

By utilizing the conductivity of the colloidal compound, the entire system can be ion-exchanged for a long time, thus forming an ideal electrolytic ion grounding system. After the slow-release filler in the conductor is embedded, the grounding resistance will gradually decrease, reaching a stable value within six months to one year, and the embedded slow-release process can last for several years. The main connecting parts of the ion grounding electrode are hot-melt welded, which has overcome other connection methods and easy connection loosening.

The connecting wire is a copper clad steel copperweld stranded wire with a section of 95 mm2 and a length of 3 m and is crimped to the grounding terminal/copper lug to facilitate connection with the copper clad steel grounding.

Chemical Ground Rod Specification and models

The grounding electrode of BEISUDA COMPANY electrolytic ion fully meets the requirements of grounding protection equipment such as UL, NEC, ANS, lEC, BC and other international standards.

Chemical Ground Electrode application range

Lightning protection and grounding works for petrochemicals, oil storage, power plants, substations, communication base stations, airports and network computer rooms, etc.