Safe use and maintenance of high-voltage arrester manufacturers
Insulators play two basic roles in overhead transmission lines. High-voltage arresters are to support conductors and prevent current from returning to the ground. These two functions of disk-type suspension insulators must be guaranteed. Insulators should not fail due to various electromechanical stresses caused by changes in environmental and electrical load conditions. Otherwise, the insulators will not play a significant role and will damage the use and operating life of the entire line.
Surge arrester, also known as: surge arrester, is an electrical device whose high-voltage insulator can release lightning or over-voltage energy in power system operation, protect electrical equipment from instantaneous over-voltage hazards, and cut off freewheeling to prevent system grounding short circuit. The lightning arrester is usually connected between the live conductor and the ground, and is connected in parallel with the protected equipment. When the overvoltage value reaches the specified operating voltage, the arrester immediately acts, flows through the charge, limits the overvoltage amplitude, and protects the insulation of the equipment; after the voltage value of the high-voltage fuse becomes normal, the arrester quickly returns to its original state to ensure the normal power supply of the system. Closely related to the degree of contamination of insulators is the size of their leakage current. Therefore, the detection of leakage current of high-voltage insulators by high-voltage load switches has practical engineering significance.
Lightning arrester manufacturer is a device used in substations to protect equipment from lightning shock waves. High-voltage wall bushing When the lightning shock wave introduced into the substation along the line exceeds the protection level of the arrester, the high-voltage current-limiting fuse arrester discharges first. The high-voltage wall bushing safely introduces the lightning current to the earth through a good conductor. The grounding device is used to limit the lightning voltage amplitude below the lightning impact level of the protected equipment, so that the electrical equipment is protected. According to the order of their development, arresters can be divided into: protective gap - the simplest form of arrester; tubular arrester - also a protective gap, but it can self-extinguish arc after discharge; valve type arrester - divides a single discharge gap into many short series gaps, while adding non-linear resistance to improve protection performance; magnetic blow arrester - uses magnetic blow spark gap to improve arc extinguishing ability, bell type anti-fouling suspension insulation The arrester also has the ability to limit internal overvoltage; zinc oxide arrester - takes advantage of the ideal volt-ampere characteristics of zinc oxide valves (very high nonlinearity, high-voltage fuses have low resistance characteristics at large currents, overhead power lines use tensioned insulators to limit the voltage on the arrester, and have high resistance characteristics at normal power frequency voltage). The high-voltage load switch has the advantages of no gap, no freewheeling and low residual voltage. It can also limit internal overvoltage and is widely used.
Yichang Hengyuan Technology Co., Ltd. specializes in the production of European-style cable joints, plug-and-pull heads, cable branch boxes, American-style elbow joints, high-voltage vacuum circuit breakers, high-voltage load switches, arresters, zinc oxide arresters, tank arresters, over-voltage protectors, counters, monitors, heat-shrinkable cable accessories, Manufacturer of cold shrink cable accessories, T-heads, wall bushings, European cable accessories, American cable joints, transformer neutral point protection devices, fuses, isolating switches, PT cable heads, elbow cable joints, 10kV outdoor terminals, switch cabinets, cable intermediate joints, cable accessories and other products
