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2505 Xingfu East Road, Hongqiao Town, Yueqing City, Zhejiang Province
Zhejiang Leisheng Electronics Co., Ltd. is a professional manufacturer and designer of surge protection device (lightning arrester) accessories and mold, at the same time, we also provide design, manufacturing, processing, production, sales services of other precise plastic mold and stamping mold.
The company was founded in March 2005. After several years of development, it has become a leading enterprise in the surge protector accessories industry and a backbone force of many domestic lightning protection leading enterprises.
Leisheng's purpose: Committed to the research and development, design, manufacturing, production, processing, sales, and support of lightning protection information and related high-precision electrical products in the lightning protection industry.
Leisheng's mission: to provide customers with uncompromising quality, create a harmonious and mutually respectful work atmosphere for employees, and provide a fair, reasonable, and mutually beneficial work platform for business partners.
Leisheng's core values:serve customers, business realistic, pursuing excellence, and integrity.
Leisheng's service philosophy: Striving for excellence in quality, striving for the perfect combination of craftsmanship, and providing standardized and efficient services. Let Lei Sheng persists in the same career and dream!
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The routine check and regular maintenance for the installed power surge arrester include the following aspects:1. Appearance inspection:Check the lightning arrester casing regularly for damage, deformation or corrosion, and confirm that the markings are clearly visible.Check whether the connecting bolts are loose and whether the screws at the wiring terminals are tightened to ensure reliable electrical connection.2.Check the IndicatorIf the lightning arrester is equipped with a indication window (such as a green/red indication window) or a remote signal contact, its working status should be checked regularly. Under normal circumstances, the indicator should show no action or standby status; once the color changes or the remote signal contact is closed, it means that the lightning arrester may have been activated and further processing is required.3. Ground resistance test:For the grounding system of the lightning arrester, check the grounding resistance periodically to ensure that it is within the specified range to ensure that the lightning current can be effectively discharged to the ground.4.Performance testing:For some power surge arresters that are detachable or have self-test functions, performance testing and replacement of internal components (such as MOV, GDT, etc.) can be carried out periodically according to the instructions or recommends provided by the manufacturer.5. Record and track:Record the results of each inspection, including the date, problems found and how they were handled, and create equipment usage files to track equipment condition and service life over the long term.6.Annual maintenance and professional inspection:It is recommended that a comprehensive inspection be carried out by professionals at least once a year, including testing of parameters such as the current carrying capacity and response time of the lightning arrester, as well as necessary preventive replacement based on actual conditions.7.TroubleshootingWhen the lightning arrester has an abnormality (such as indicator color change, protection system alarm, etc.), the cause should be promptly identified and appropriate measures should be taken. If necessary, please ask professional technicians to repair or replace the failed parts.In short, correct daily inspection and regular maintenance are essential to ensure the continued effectiveness of power surge arresters and extend their service life. At the same time, it can also timely detect potential safety hazards and reduce the risk of equipment damage caused by lightning or other overvoltages.
In modern buildings and electronic facilities, the correct installation location of lightning arresters is crucial to achieve optimal lightning protection. The following is a detailed discussion on how to select and arrange lightning arresters to ensure optimal protection.First,based on the principle of lightning protection zone1. **LPZ0 zone**: This is the area directly exposed to the risk of lightning strikes, mainly including the roof of the building, antennas, overhead cable entrances, etc. Type I lightning arresters (external lightning arresters), such as lightning arresters (lightning rods, lightning strips) and down conductor systems, should be installed here. Their function is to attract and guide lightning current into the underground grounding system to initially discharge lightning energy.2. **LPZ1 area**: In this area, lightning arresters need to be installed at the locations where power lines, signal lines, and data lines are introduced into the building to prevent lightning waves from invading the room. Here, select appropriate surge protective devices (SPDs) and signal lightning arresters to limit the remaining lightning overvoltage to a lower level through layered protection.3. **Subsequent protection zone (LPZ2 and above)**: As the protection level deepens, the lightning arrester should be installed closer to sensitive equipment, especially at the power inlet and signal input and output ports of key electronic equipment to achieve refined protection. Appropriate lightning arresters should be selected for each level of protection, and graded voltage limiting should be used to ensure that the voltage that finally reaches the equipment is not enough to cause damage.Second,Consider the geographical environment and building characteristics- **Geographic location**: When a building is located on a mountain top, in an open area, or without any shelter around it, the probability of lightning strike increases. The installation location of the lightning arrester should pay more attention to the capture and guidance of external lightning.- **Building height and structure**: Tall buildings such as high-rise buildings, communication base stations and antenna towers should have lightning rods installed on the top, and ensure that there is enough distance and good electrical connection between the lightning rods and the lightning arrester.- **Grounding system**: The lightning arrester should be closely connected to the main grounding grid of the building, and the grounding resistance should meet the regulatory requirements to ensure that the lightning current can be smoothly introduced into the earth and reduce the risk of strike back.Thirdly,Selection of line access point- **Power lines**: Power lightning arresters should be installed on the main incoming line, floor main box and the front end of the terminal equipment to ensure the step-by-step discharge of lightning energy from high voltage to low voltage. - **Signal lines**: For weak current signal lines such as telephone lines, network lines, TV signal lines, and monitoring lines, corresponding signal lightning arresters should be installed at the entrance to the building and the front end of the equipment to prevent the intrusion of lightning electromagnetic pulses (LEMP).Fourth,Installation details and precautions- **Wiring specifications**: The connecting wires of the lightning arrester should be as short and thick as possible to reduce the inductance effect and ensure that the lightning energy can be quickly released at the moment of lightning strike.- **Easy maintenance and inspection**: The lightning arrester should be installed in a location that is easy to maintain and inspect, so that its working status can be regularly tested and failed parts can be replaced in time.In short, the installation location of the lightning arrester not only depends on the division of the lightning protection zone, but also needs to be combined with the actual geographical environment, building structure and the characteristics of various lines. Only through scientific and reasonable design and installation can the lightning arrester play its best role, effectively prevent lightning disasters, and protect the safety of various facilities and personnel. At the same time, regular maintenance and testing are also an indispensable part of maintaining the effectiveness of the lightning protection system.
When selecting a lightning arrester, you need to consider a number of factors to ensure that it can both effectively prevent damage from lightning strikes and work reliably in daily operations. Here are some suggestions:1. Determine the type of power distribution system:First, clarify the type of power distribution system in the area, such as TT, TN or IT system. Different power distribution systems determine the configuration and protection mode of the lightning arrester.2. Choose the appropriate level and category:Select an appropriate level 1, level 2 or level 3 lightning arrester based on the lightning protection level of the building or facility, the importance of the protected lines and equipment, and the degree of risk of lightning strike.3. Voltage protection level (Up):Select the appropriate voltage protection level according to the impulse voltage level of the protected equipment, and ensure that the Up value is lower than the withstand voltage value of the equipment. In this way, when a lightning strike occurs, the lightning arrester can effectively clamp the voltage to prevent excessive voltage from damaging the equipment.4. Rated voltage (Un) and current (In)The rated voltage of the lightning arrester should be consistent with the rated voltage of the protected circuit, and for the rated current,should take into account the maximum operating current that may occur in the actual circuit to ensure that the lightning arrester will not overheat and be damaged when overloaded.5. Surge protector type:For power supply systems, choose SPD (Surge Protective Device) suitable for AC or DC. For signal systems, such as network, video, telephone and other weak current signals, choose dedicated signal lightning arresters.6. Manufacturer Qualification and Certification:Choose products with certification from authoritative organizations, such as UL, TUV, CE, CCC, etc., to ensure that the quality of the lightning arrester meets relevant international or domestic standards.7. Core component quality:The core components of lightning arresters are usually zinc oxide varistors or gas discharge tubes. Attention should be paid to the quality and stability of these components, and manufacturers with a good reputation and mature technology should be selected.8. Response speed and residual pressure characteristics:Consider the response time, energy absorption capacity and residual voltage characteristics of the lightning arrester, which directly affect whether the lightning arrester can be started in time and effectively reduce the damage of lightning current to the protected equipment.9. Installation and maintenance convenience:Consider whether the installation method of the lightning arrester is easy to operate, maintain and replace, and whether it has good supporting accessories such as remote signal alarm, fault display, etc.10. After-sales service and technical support:Choose a supplier with complete after-sales service and technical support so that you can get timely technical guidance and maintenance services when the lightning arrester fails.By considering and comparing all the above aspects, you can choose a lightning arrester product that is both economical and practical and meets safety regulations.
2024-04-30The main functions and design purposes of installing lightning arrester include the following:1. Lightning protection: The basic function of a lightning arrester is to prevent high voltage and high current generated by direct lightning strikes or lightning induction from entering electrical systems and electronic equipment, and to protect buildings, transmission lines, communication systems and various sensitive electronic equipment from damage by lightning.2. Overvoltage protection: In addition to lightning protection, lightning arresters are also used to suppress overvoltages caused by grid operation, surges, switching transients, etc., to ensure safe operation of equipment.3. Energy diversion: By diverting excess current energy to the ground, the lightning arrester can effectively limit the voltage entering the protected equipment and reduce the risk of damage.4. Signal protection: For signal line lightning arresters (such as network, telephone, and TV signal line lightning arresters), their design purpose also includes protecting signal integrity and ensuring that data communications are not interfered with.5. Electrical system stability: Surge arresters help maintain the stability and reliability of electrical systems and reduce power outages and system failures caused by lightning strikes or overvoltage.6. Comply with safety regulations: Lightning arresters are also installed to meet national and regional building electrical installation regulations and industry safety standards to ensure compliance with facility operations.7. Economic considerations: Although installing lightning protectors requires an initial investment, in the long run, it can significantly reduce repair costs and equipment replacement costs caused by lightning and overvoltage, making it a cost-effective preventive measure.8. Personal safety: By preventing fire and electric shock accidents caused by damage to the electrical system, lightning arresters also indirectly protect personnel safety.In summary, the installation of lightning arresters is a key component of the protection strategy for electrical systems and electronic equipment, aimed at ensuring the normal operation of equipment and systems and the safety of personnel during lightning activities and other overvoltage events.
2024-04-30The VDE-tested MCF75 and MCF100 combined arresters (Class I+II) meet the requirements for surge protection and save up to 25% of space.To prevent personal injury or property damage caused by surge voltages, all new or expanded buildings and all new electronic facilities have been surge protected in accordance with the mandatory regulations of VDE 0100-443 since October 2016. Not only direct electric shock can cause serious damage to electronic equipment and systems, but surge voltages generated by electric shocks within a range of up to two kilometers are more common.The new MCF Compact type I+II combined lightning arrester effectively protects equipment and systems from lightning and surge voltages. Installed in the main distribution box of the building, the device ensures the safety of industrial plants as well as offices, commercial facilities or residential buildings. It can be used in buildings with lightning protection levels 1 to 4 and provides system fuse protection up to 315 A without the need for additional spare fuses.The combined arrester is available in 3-pole (TNC grid) and 4-pole (TT and TNS grid) versions. The remote signaling function with potential-free changeover contact is available for all versions at no extra charge.A colored, non-leakage current status indicator also signals to the end customer whether the device is still functioning.Installation is quick and easy: just snap the combined arrester into the mounting rail of the control cabinet. In addition, the MCF Compact is 25% smaller than conventional devices, so it saves more space and is easier to use in the power supply unit/control cabinet.The QR code on the device allows quick access to technical information from the OBO website via a smartphone or tablet PC.
2024-04-30
2505 Xingfu East Road, Hongqiao Town, Yueqing City, Zhejiang Province
+86 17858071033
ED@cnleisheng.com
+86 13968769182
sword@cnleisheng.com