CN206878312U - A Combined Pin Arrester - Google Patents

Abstract

A kind of combined pin type arrester is the utility model is related to, belongs to electrical equipment technical field.The arrester includes：Hollow silastic material, penetrating electrodes, grounding screw and first, second sparking electrode；First sparking electrode is connected by the first high-voltage resistor with penetrating electrodes；Second sparking electrode connects grounding screw by the second high-voltage resistor with some resistor discs；There is multilayer full skirt outside silastic material.Combined pin type arrester provided by the utility model; built in air gap; when distribution line meets with lightening strikes; sparking electrode plays arrester effect; lightning voltage, electric current are discharged, the insulation of its air gap recovers immediately, blocks follow-up power current; follow-up power current is avoided to the burn of wire and insulator, prevents distribution line outlet protection act tripping operation.Normal condition, arrester flow only through capacitance current, the leakage current of trace such as common porcelain insulator（Airspace insulation produces）, arrester is in off position.

Description

A Combined Pin Arrester

technical field

The utility model relates to a combined pin type lightning arrester, which belongs to the technical field of electric equipment.

Background technique

Practice has proved that the overvoltage protector has a good protective effect on preventing insulated wires from being disconnected by lightning. There are mainly two types of overvoltage protectors: "puncture" and "non-puncture". The purpose of puncture is to make the insulated wire near the insulator bare, so that the arc root of the power frequency arc is transferred, and the "non-puncture" overvoltage protector will not cause damage to the insulated wire by cutting off the power frequency freewheeling. The low insulation level makes it easy to be attacked by induction lightning, which is the main cause of lightning faults in overhead lines.

With the transformation of large-scale urban and rural power grids in my country, a large number of overhead insulated lines are used in urban distribution networks. Insulated wires do solve corridors and safety problems that bare wires cannot solve. Compared with cables, they have the advantages of less investment and faster construction. However, the problem of lightning disconnection is very prominent. Solving lightning disconnection to ensure the safety of overhead insulated lines is one of the main problems currently facing the power system.

Contents of the invention

The technical problems to be solved by the utility model are: to overcome the disadvantages of the above-mentioned technologies; to propose a pin-type arrester integrating the arrester and the insulator.

In order to solve the above technical problems, the technical solution proposed by the utility model is: a combined pin arrester, comprising: a hollow silicone rubber jacket, a piercing electrode installed on the top of the silicone rubber jacket, The grounding screw at the bottom and the opposite and spaced first and second discharge electrodes installed in the silicone rubber jacket; the first discharge electrode is connected to the puncture electrode through a first high voltage resistor; the second The discharge electrode is connected to the ground screw through the second high-voltage resistor and several resistor sheets; the first and second discharge electrodes, the first high-voltage resistor, the second high-voltage resistor, and the resistor sheets are wrapped with epoxy glass fiber tubes; The epoxy glass fiber tube is located inside the silicone rubber jacket; the outside of the silicone rubber jacket has multi-layer sheds.

A further improvement of the above solution is that: the puncture electrode is arranged in a groove; the groove has a wire pressing plate; the wire pressing plate is installed on the top of the silicone rubber casing through bolts.

A further improvement of the above solution is that: the resistance sheet is a zinc oxide resistance sheet.

The combined pin arrester provided by the utility model has a built-in air gap. When the distribution line encounters a lightning attack, the discharge electrode acts as an arrester to release the lightning voltage and current, and the air gap insulation immediately recovers, cutting off the subsequent power frequency current. Avoid the subsequent power frequency current from burning the wires and insulators, and prevent the tripping of the protection action at the outlet of the distribution line. In the normal state, the arrester only flows through the capacitive current and trace leakage current (generated by air gap insulation) like ordinary porcelain insulators. Maintenance free.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a schematic structural diagram of a preferred embodiment of the utility model embodiment.

detailed description

Example

The combined pin arrester of the present embodiment, as shown in Figure 1, includes: a hollow silicone rubber jacket 1, a puncture electrode 6 installed on the top of the silicone rubber jacket 1, a grounding screw 9 installed on the bottom of the silicone rubber jacket 1, and a silicon rubber jacket The opposite and spaced first discharge electrodes 2a and second discharge electrodes 2b in the rubber jacket 1; the first discharge electrodes 2a are connected to the puncture electrodes 6 through the first high voltage resistor 3a; the second discharge electrodes 2b are connected through the second high voltage resistor Connector 3b and several nonlinear zinc oxide resistors 4 are connected to the grounding screw 9; in order to make the connection more reliable, between the first high voltage resistor 3a and the piercing electrode 6, between the nonlinear zinc oxide resistors 4 and the grounding screw 9 are connected Electrode 5 is connected. The connection electrode 5, the first discharge electrode 2a, the second discharge electrode 2b, the first high voltage resistor 3a, the second high voltage resistor 3b and the resistor sheet 4 are wrapped with a high-strength epoxy glass fiber tube 10; the epoxy glass fiber tube 10 is located at The silicon rubber jacket 1 is inside and the empty space therein is filled; the silicone rubber jacket 1 has a multi-layer shed.

The puncture electrode 9 is arranged in a groove; the groove has a wire pressing plate 7; the wire pressing plate 7 is installed on the top of the silicone rubber jacket 1 through bolts 8; the position of the wire pressing plate 7 corresponding to the groove has a protrusion, when the distribution line is When placed in the groove and pressed against the wire pressing plate 7, a seal is created which prevents gas and moisture from entering the position where the distribution wire is punctured.

The combined pin arrester provided in this embodiment integrates the functions of a metal oxide arrester and a composite insulator, and has a built-in air gap. When the distribution line is attacked by lightning, the air between the discharge electrodes is broken down and ionized, and the arrester is turned on, thus acting as an arrester, releasing the lightning voltage and current, and then the air gap insulation immediately recovers, cutting off the subsequent power frequency current, avoiding subsequent The power frequency current burns the wires and insulators, preventing the tripping of the protection action at the outlet of the distribution line.

In the normal state, the arrester only flows through the capacitive current and trace leakage current (generated by air gap insulation) like ordinary porcelain insulators. maintain.

The combined pin arrester provided in this embodiment adopts a silicone rubber jacket, which has good water repellency, aging resistance, tracking resistance and electrical corrosion resistance, and is filled with high-strength epoxy glass fiber tubes 10 , with high tensile and flexural strength.

The combined pin arrester provided in this embodiment is a new generation product replacing the original distribution line overvoltage protector, gapless zinc oxide arrester and porcelain pin insulator. Install one set every 200m in the distribution lines in operation, which can achieve 94% lightning protection effect, greatly reduce the lightning insulation flashover rate of distribution lines, lightning disconnection rate, and tripping rate of substation distribution lines. Improve power supply reliability, reduce maintenance workload and maintenance costs.

The utility model is not limited to the specific technical solutions described in the above embodiments, except for the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement are within the scope of protection required by the utility model.

Claims (3)

1. A combined pin arrester, characterized in that it comprises: a hollow silicone rubber overcoat, a piercing electrode mounted on the top of the silicone rubber overcoat, a grounding screw installed on the bottom of the silicone rubber overcoat, and The opposite and spaced first and second discharge electrodes in the silicone rubber jacket; the first discharge electrode is connected to the puncture electrode through the first high voltage resistor; the second discharge electrode is connected to the puncture electrode through the second high voltage resistor and A number of resistance sheets are connected to the grounding screw; the first and second discharge electrodes, the first high-voltage resistor, the second high-voltage resistor and the resistance sheets are wrapped with epoxy glass fiber tubes; the epoxy glass fiber tubes are located on the Inside the silicone rubber jacket; the outside of the silicone rubber jacket has multi-layer sheds. 2. The combined pin arrester according to claim 1, characterized in that: the piercing electrode is set in a groove; the groove has a wire pressing plate; the wire pressing plate is installed on the Silicone rubber jacket top. 3. The combined pin arrester according to claim 1, characterized in that: the resistance piece is a zinc oxide resistance piece.