Drop arrester/removable arrester structure

The standard model is HY5WS-17/50DL-TB, surge arrester manufacturer

The drop arrester is a high-voltage combined electrical appliance that is easy to disassemble and uninterrupted. It is used in 6kv, 10kv, and 35kv high-voltage power lines. The product performance solves the disadvantages of the original installation and disassembly of the lightning arrester, and the necessity of power outage. The main advantages are convenient disassembly, assembly and maintenance, safety and reliability, no need to power off during disassembly and assembly, and at the same time it can reduce the labor intensity of the staff.

Background technique

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. It can release lightning or both can release the power system operation. Voltage energy is an electrical device that protects electrical equipment from instantaneous overvoltage hazards, and can also cut off the continuous current, and will not cause a system grounding short circuit. The arrester is usually connected between the live wire and the ground, and is connected in parallel with the protected equipment. When the overvoltage value reaches the specified operating voltage, the arrester will act immediately, and the charge will flow to limit the amplitude of the overvoltage and protect the equipment insulation; when the voltage value is normal, the arrester will quickly restore its original state to ensure the normal power supply of the system.

The main types of lightning arresters include protective gaps, valve-type arresters and zinc oxide arresters, and cold-shrinkable cable terminals. The protective gap is mainly used to limit the atmospheric overvoltage, and is generally used for the protection of the power distribution system, the line and the incoming line of the substation. Valve-type arresters and zinc oxide arresters are used for the protection of substations and power plants. In systems of 500KV and below, they are mainly used to limit atmospheric overvoltages. In ultra-high voltage systems, they will also be used to limit overvoltages or as backup protection for overvoltages. .

When the lightning arrester fails or is damaged, it is necessary to have a breakaway mechanism to disconnect the arrester from the grounding line to prevent the further expansion of the accident and facilitate maintenance personnel to find out and perform maintenance in time.

In view of this, the present invention provides a detachable lightning arrester. When the arrester fails or is damaged, the arrester can be disconnected from the grounding line to ensure circuit safety.

Its structural design is mainly provided with a lightning arrester and an insulating installation pillar. The lightning arrester is electrically connected with the upper end of the insulating installation pillar through a moving contact, and the lightning arrester is electrically connected with the lower end of the insulating installation pillar through a static contact. One end is a "Z"-shaped connecting end, the lower end of the insulating mounting post is provided with a screw hole, the "Z"-shaped connecting end of the static contact is screwed to the screw hole at the lower end of the insulating mounting post through a bolt, and the front end of the "Z"-shaped connecting end is also provided There is a grounding plate; the lower end of the arrester is also provided with a disconnector, and the disconnector is provided with a disconnection component that can separate the static contact from the disconnector, and the movable contact is also provided with a high-voltage side terminal.

The disconnector is a hot-melt type disconnector, and the disconnection component that can separate the static contact from the disconnector is an alloy frit arranged between the disconnector and the static contact.

The positive effects are:

The power distribution type zinc oxide arrester is refitted and cleverly installed on the drop-out mechanism of the drop-out fuse, so that in the case of uninterrupted power, the arrester can be easily detected, repaired and replaced with the help of an insulating pull ring, which not only guarantees The line is unblocked, and the work intensity and time of power maintenance personnel are greatly reduced. It is especially suitable for places where power outages are not suitable, such as post 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 arrester's rapid separation from the insulating installation pillar, so that the maintenance personnel Find the fault arrester in time, replace and maintain it.

Yichang Hengyuan Technology Co., Ltd. is a professional manufacturer of European-style cable connectors, plug connectors, cable branch boxes, American elbows, high-voltage vacuum circuit breakers, high-voltage load switches, lightning arresters, zinc oxide arresters, tank arresters, overvoltage protectors, Counters, monitors, heat-shrinkable cable accessories, cold-shrinkable cable accessories, T-heads, wall bushings, European cable accessories, American cable joints, transformer neutral point protection devices, fuses, isolating switches, PT cable heads, elbows Manufacturers of type cable joints, 10kV outdoor terminals, switch cabinets, cable intermediate joints, cable accessories and other products