Drop arrester/detachable arrester structure
The standard model is HY5WS-17/50DL-TB, lightning arrester manufacturer
The drop-type arrester is an easy-to-disassemble, non-stop high-voltage combined electrical appliance, which is used on 6kv, 10kv, and 35kv high-voltage power lines. The product performance solves the original problem of difficulty in installing and disassembling arresters and the necessity of power outage. The main advantages are that it is convenient for disassembly, assembly and maintenance, is safe and reliable, does not require power outage during the disassembly and assembly process, and can reduce the labor intensity of the staff.
Background technology
The role of zinc oxide arrester is to protect various electrical equipment in the power system from damage caused by lightning overvoltage, operating overvoltage, and power frequency transient overvoltage impact. It is an electrical device that can release lightning or both release the operating overvoltage energy of the power system, protect electrical equipment from instantaneous overvoltage hazards, and can cut off the freewheeling current 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 operates, charges flow, limits the overvoltage amplitude, and protects the insulation of the equipment; when the voltage value becomes normal, the arrester quickly returns to its original state to ensure the normal power supply of the system.
The main types of arresters include protection gaps, valve-type arresters, zinc oxide arresters, and cold-shrink cable terminals. The protection gap is mainly used to limit atmospheric overvoltage, and is generally used to protect power distribution systems, lines and substation incoming line sections. Valve type arresters and zinc oxide arresters are used for the protection of substations and power plants. They are mainly used to limit atmospheric overvoltage in systems of 500KV and below. In ultra-high voltage systems, they will also be used to limit overvoltage or serve as backup protection for overvoltage.
When the arrester fails or is damaged, a disengagement mechanism is required to disconnect the arrester from the grounding line to prevent further expansion of the accident and make it easy for maintenance personnel to find and perform maintenance in time.
In view of this, the present invention provides a detachable arrester. When the arrester fails or is damaged, the arrester can be disconnected from the grounding line to ensure circuit safety.
Its structural design mainly includes a lightning arrester and an insulation installation pillar. The upper end of the lightning arrester and the insulation installation pillar are electrically connected through a movable contact. The arrester and the lower end of the insulation installation pillar are electrically connected through a static contact. Among them, one end of the static contact is hinged on the arrester, and the other end is a "Z" shaped connection end. The lower end of the insulation installation pillar is equipped with a There are screw holes, and the "Z"-shaped connection end of the static contact is screwed to the screw hole at the lower end of the insulation installation support through bolts. The front end of the "Z"-shaped connection end is also equipped with a grounding plate; the lower end of the arrester is also equipped with a disconnector, and the disconnector is equipped with a disconnection component that can separate the static contact from the disconnector. There is also a high-voltage side terminal on the moving contact.
The disconnector is a hot-melt disconnector, and the disconnection component that can separate the static contact from the disconnector is an alloy fusion chip disposed between the disconnector and the static contact.
The positive effects are:
The distribution-type zinc oxide arrester is modified and cleverly installed on the drop-type mechanism of the drop-type fuse. In the case of uninterrupted power, the arrester can be easily detected, repaired and replaced with the help of the insulating pull ring. It not only ensures the smooth flow of lines, but also greatly reduces the work intensity and time of power maintenance personnel. It is especially suitable for use in places where power outages are not suitable, such as postal and telecommunications, airport stations, hospitals, and bustling commercial areas.
The cold shrinkable cable terminal and disconnector can increase the power frequency current according to the transformation of the zinc oxide arrester, and use the short-circuit current flowing through the failed arrester to fuse the alloy fuse in the disconnector to achieve the rapid separation of the arrester from the insulating installation pillar, allowing maintenance personnel to promptly find faulty arresters and replace and maintain them.
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
