Chimney installation lightning rod steel structure anti-corrosion

Chimney installation lightning rod steel structure anti-corrosionHongshun Construction Engineering Co., Ltd. is located in a flammable and explosive field. All mechanical devices, metal pipelines, electrical equipment, including building metal structures, must be grounded, and crossing lines must be buried at the joints of each pipeline; In order to prevent danger when measuring the grounding resistance of the measuring equipment, measures should be taken locally, or corresponding measures should be taken to pull the measuring terminal to a non hazardous location for measurement;
There should be at least 2 points connecting the grounding body and the grounding main line, and the grounding bodies should be connected at both ends of the building; In grounding lines with a neutral point of less than 1kV, current protection must be used for the line. Assuming that the line needs to pass through a fuse, the safety factor of the protective device used for the line must be above 4. If a circuit breaker is used, the safety factor must be above 2. The grounding body should be installed outside the wall of the substation, at a distance of more than 3 meters from the wall. The depth of the grounding grid must be higher than the thickness of the frozen soil and cannot be thinner than 0.6 meters. For grounding equipment, the grounding body should be laid horizontally. The grounding body should be a round steel with a length of 2.5m and a diameter of 12mm or more, or a steel pipe or angle steel with a thickness of 4mm or more, circular in shape, and the edge angle must be curved; Adopt protective grounding and working grounding for the main transformer of the substation, and both need to be connected to the artificial grounding grid; The lightning rod must be independently equipped with a grounding device. Usually, metals are severely chemically corroded under the action of direct current.
Causing its contact resistance to become increasingly high. So in order to install grounding devices on DC lines and ensure their good operation, these measures must be taken. The thickness of the artificial grounding body on the DC should be at least 5mm, and its erosion condition should be checked regularly; The grounding device on the DC line cannot be used as a PE wire with a grounding body or natural grounding body that is reused for grounding, nor can it be directly connected to the natural grounding body. Check for damage, corrosion, breakage, and good contact at all connection points of the grounding device; Before the rainy season, when the soil resistivity is high, measure the grounding resistance of the grounding equipment and analyze and compare the measurement results. Check whether the grounding body within 500mm underground in areas with strong acid, alkali, and salt in the soil is severely corroded; Check if the electrical equipment is connected to the grounding wire, if the grounding wire is connected to the grounding grid, and if the grounding wire is connected to the grounding main line; For repaired electrical equipment.
Further check if the grounding wire connection is secure. The grounding equipment of the distribution (substation) is usually inspected once a year; Grounding equipment used for lightning protection must be inspected once a year before the arrival of thunderstorm season; Depending on the specific situation of the building or workshop, inspect the overall operation of the grounding wire 1-2 times a year; For grounding devices installed in corrosive soil, observe the specific operation and check the grounding body underground every 3-5 years; Measure the grounding resistance of the grounding equipment every 1-3 years; Check the grounding wire of mobile and handheld electrical equipment before each use. Electrical fires are usually caused by factors such as insulation aging, loose joints, overload or short circuit of electrical equipment leading to overheating. Especially in flammable and explosive places, the above-mentioned electrical circuit hazards pose greater risks. To prevent electrical fires, fire prevention measures must be taken. Regularly check the operation of electrical equipment, check for loose joints, and detect any electrical sparks.
Whether the overload and short-circuit protection devices are reliable in performance, and whether the equipment insulation is good. Reasonably select electrical equipment. When installing and using electrical equipment in places with flammable and explosive materials, explosion-proof electrical appliances should be selected, and insulated wires must be sealed and laid inside steel pipes. Electrical equipment should be selected and installed according to the level of hazardous locations. Maintain a safe installation position. Maintaining a necessary safety distance is an important measure for electrical fire prevention. To prevent electrical sparks and dangerous high temperatures from causing fires, flammable and explosive materials should not be stacked around electrical equipment that can generate sparks and dangerous high temperatures. Maintain the normal operation of electrical equipment. Sparks and dangerous high temperatures generated during the operation of electrical equipment are important causes of electrical fires. To control excessive work sparks and dangerous high temperatures, and ensure the normal operation of electrical equipment, it should be operated, used, and maintained by trained and qualified personnel. improve air circulation Electrical equipment operating in flammable and explosive hazardous areas should have good ventilation to reduce the concentration of sexual mixtures.
The ventilation system should comply with relevant requirements. Grounding. The grounding requirements in flammable and explosive hazardous areas are higher than those in general places. Regardless of the voltage, normally non charged devices should be reliably grounded according to relevant regulations. When electrical equipment catches fire, the appliances that catch fire. Reply 24 hours a day
When there are no special requirements, a general grounding body should adhere to the principle of equipotential connection, connecting the metal pipes and components of the building to the general grounding body; To ensure equipment and personal safety, all electrical equipment must be grounded according to standards. And the protective grounding wire is only used for the specified protective grounding or working grounding, and cannot be used for other purposes; For grounding systems with special requirements, such as medium voltage systems and weak current systems, when grounded through small resistors or neutral points, they must be implemented in accordance with the corresponding special regulations; The artificial main grounding body must not be located inside the building. When grounding, the grounding resistance of the main grounding body must be set according to the requirements of the small grounding resistance.

Chimney installation lightning rod steel structure anti-corrosion