CN102723708A

CN102723708A - Graphite type arrester

Info

Publication number: CN102723708A
Application number: CN2012102266481A
Authority: CN
Inventors: 熊整建
Original assignee: SHENZHEN XINSEN ZHONGNENG TECHNOLOGY CO LTD
Current assignee: SHENZHEN XINSEN ZHONGNENG TECHNOLOGY CO LTD
Priority date: 2012-07-03
Filing date: 2012-07-03
Publication date: 2012-10-10

Abstract

The invention discloses a graphite type arrester. A circuit device portion comprises a graphite main discharging loop portion, a capacitor ignition circuit portion and an auxiliary C-grade loop portion which is added on the base of a lightning protection B-grade loop. The graphite main discharging loop portion is composed of an upper connection strip, a lower connection strip and a connection screw. The upper connection strip and the lower connection strip are connected through the connection screw and are respectively provided with an electrode. Graphite is installed between the upper connection strip and the lower connection strip. The auxiliary C-grade loop is added on the base of the B-grade loop, a B+C-grade loop can be combined through energy matching, a graphite gap can be started even under surge lower than 2000 volts after a B+C circuit is adopted, and devices can be effectively protected under the lower voltage condition. In addition, a long distance discharging structure with an arming device is adopted to ensure that no follow current is generated in discharging, and discharging is triggered by high voltage, so that residual voltage consistency and ignition voltage consistency are good.

Description

A kind of graphite mould lightning arrester

Technical field

The present invention relates to a kind of lightning arrester, what be specifically related to is a kind of graphite mould lightning arrester.

Background technology

Lightning arrester can discharge thunder and lightning or hold concurrently and can discharge power system operation overvoltage energy, and the protection electrical equipment is avoided instantaneous overvoltage harm, can block afterflow again, the unlikely electrical installation that causes the system earth short circuit.Lightning arrester is connected between live wire and the ground usually, with parallelly connected by protection equipment.When overvoltage value reached specified action voltage, lightning arrester moved immediately, flow through electric charge, and the over-voltage amplitude is protected apparatus insulated; After magnitude of voltage was normal, lightning arrester restored to the original state rapidly again, to guarantee system's normal power supply.Some problems below most of at present gap module of using exists: present graphite gap all is to adopt the capacitance point ignition circuit; Such circuit needs the voltage of 2000-3000V by the real discharge in graphite gap; Surge below 2000V; Present graphite gap all can not start, and can not protect equipment in low voltage condition like this; A lot of products say that all arc-rupturing capacity is strong, can interdict afterflow, but accomplish that really the product that does not have afterflow does not have at present.

Summary of the invention

To the problems referred to above, the present invention aims to provide a kind of life-span length, no afterflow and the low graphite mould lightning arrester of deboost.

For realizing this technical purpose; Scheme of the present invention is: a kind of graphite mould lightning arrester; Comprise the circuit arrangement part that box body and box body are inner, said circuit arrangement partly comprises graphite main discharge circuit part, capacitance point ignition circuit part, lightning protection device B level loop composition; On the basis in said B level loop, increased auxiliary C level loop feature; Said B+C level loop feature combines through the energy cooperation; Said graphite main discharge circuit part is made up of last intercell connector, following intercell connector and connecting screw rod; Said intercell connector up and down connects through said connecting screw rod, and said intercell connector up and down all is equipped with electrode, is being equiped with graphite between the intercell connector up and down.

As preferably, said capacitance point ignition circuit part is made up of electric capacity.

As preferably, said graphite electrode has adopted 11.

As preferably, said electric capacity is nine.

As preferably, be equiped with retarder at the medial surface of said box body.

This programme on the basis in B level loop, increases auxiliary C level loop and B+C level loop combines through the energy cooperation; Adopt the surge that makes behind the B+C circuit below 2000V; The graphite gap all also can start, and in low voltage condition equipment is effectively protected like this; In addition, adopt the discharging structure of remote band percussion lock, can guarantee when discharge, not produce afterflow, and discharge is to lean on the high voltage percussion, can accomplish that therefore the consistency of consistency and ignition voltage of residual voltage is very good.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 puts back to the circuit loop structural representation for graphite master of the present invention;

Fig. 3 is an auxiliary C level loop circuit sketch map of the present invention.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the present invention is explained further details.

As shown in Figure 1, a kind of graphite mould lightning arrester of best specific embodiment of the present invention according to shown in Figure 2, assembles two electrodes and upper and

lower intercell connector

2 and 5 earlier, and the connecting screw rod 9 with insulation connects then, is installed in the bottom of box body 1 again; Said box body 1 inside is made up of three parts: said circuit arrangement comprises that partly graphite main discharge circuit part, capacitance point ignition circuit part, lightning protection device B level loop form; On the basis in said B level loop, increased auxiliary C level loop feature; Said B+C level loop feature cooperates through energy and combines, and said graphite main discharge circuit part is by last intercell connector 2, intercell connector 5 and insulation connecting screw rod 9 are formed down, and said upper and lower intercell connector 2 is connected through said connecting screw rod 9 with 5; Said

intercell connector

2 and 5 up and down all is equipped with electrode; Between upper and

lower intercell connector

2 and 5, be equiped with graphite flake in parallel 3, said graphite flake 3 is 11, nine gaps; Mainly be for the discharge in do not produce afterflow, between graphite flake 3 returning apparatus insulation spacer 8; Said capacitance point ignition circuit part is made up of condenser network 4; The electric capacity of said condenser network 4 is nine; Condenser network 4 elements are placed on the correspondence position of circuit board, and weld, be fixed on the top of box body 1; Be connected on the corresponding graphite flake 3 with the corresponding aperture of nine springs then, can lower the starting resistor in each gap circuit; Said auxiliary C level loop is pressure-sensitive with the RV1 of C level circuit 7, FU Temperature protection, V1 gas discharge tube, L1 inductance are welded on respectively on the corresponding position; With lead C level circuit 7 is connected with 5 with upper and lower intercell connector 2; At last box body 1 is covered, this has just accomplished the installation of module; As better scheme,, guaranteed the logic and the cleaning of outer conductor in the box body 1 at the medial surface increase retarder 6 of box body 1.

The function in auxiliary C level loop is in order to eliminate afterflow, and the distance of electrode need be accomplished enough big, and ignition voltage is very high like this, and the increase subsidiary loop can reduce ignition voltage.Physical circuit is seen Fig. 3. auxiliary C level loop can reduce the response voltage of gap greatly.Therefore, the gap of protecting as the first order not only has high discharge capability, has kept low-response voltage simultaneously.The starting resistor of the ratio main discharge circuit of the starting resistor of subsidiary loop design is low.When surge voltage arrives, at first be that auxiliary circuit starts earlier like this, when being elevated to the starting resistor of main discharge circuit along with surge voltage, main discharge circuit is breakdown.At this moment the voltage at main discharge circuit two ends is by clamped, and clamped voltage is lower than the starting resistor of auxiliary circuit.At this moment auxiliary circuit is failure to actuate, at the big auxiliary circuit of effectively having protected when through-flow.

This lightning arrester should not have the live metal body arc spraying passage (front or rear) 150mm planted agent greater than 50mm with metal box sidewall distance during installation, when existence exposes electrified body, should adopt isolation (insulation) to cover measure.When current supply circuit fuse (or air switch) rated current＞250A, need on lightning arrester parallel branch (live wire), install the fuse (or air switch) below the 250A additional, otherwise then do not need.This lightning arrester need not special maintenance.

The electrodes use of this lightning arrester module is at a distance with the discharging structure of percussion lock, and such structure does not produce afterflow when can guarantee just discharge.Because its discharge is to lean on the high voltage percussion, therefore can accomplish very good of consistency of consistency and the ignition voltage of residual voltage, can simplify production technology and reduction manufacturing cost greatly.Adopt the surge that makes behind the B+C circuit below 2000V, the graphite gap all also can start, and in low voltage condition equipment is effectively protected like this.

The above; Be merely preferred embodiment of the present invention; Not in order to restriction the present invention, every foundation technical spirit of the present invention to any trickle modification that above embodiment did, be equal to replacement and improve, all should be included within the protection range of technical scheme of the present invention.

Claims

1. a graphite mould lightning arrester comprises the circuit arrangement part that box body and box body are inner, it is characterized in that: said circuit arrangement partly comprises graphite main discharge circuit part, capacitance point ignition circuit part, lightning protection device B level loop composition; On the basis in said B level loop, increase by an auxiliary C level loop feature; Said B+C level loop feature cooperates combination through energy; Said graphite main discharge circuit part is made up of last intercell connector, following intercell connector and connecting screw rod; Said intercell connector up and down connects through said connecting screw rod, and said intercell connector up and down all is equipped with electrode, is being equiped with graphite between the intercell connector up and down.

2. graphite mould lightning arrester according to claim 1 is characterized in that: said capacitance point ignition circuit part is made up of electric capacity.

3. graphite mould lightning arrester according to claim 1 is characterized in that: said graphite electrode has adopted 11.

4. graphite mould lightning arrester according to claim 3 is characterized in that: said electric capacity is nine.

5. according to each described graphite mould lightning arrester in the claim 1 to 4, it is characterized in that: the medial surface at said box body is equiped with retarder.