CN101478140B

CN101478140B - Self-disengaging three phase combined over-voltage protector

Info

Publication number: CN101478140B
Application number: CN2009101160806A
Authority: CN
Inventors: 茅东; 郭耀华
Original assignee: ANHUI GUOKE ELECTRIC POWER EQUIPMENT CO LTD
Current assignee: ANHUI HEKAI ELECTRIC TECHNOLOGY CO., LTD.
Priority date: 2009-01-16
Filing date: 2009-01-16
Publication date: 2012-05-02
Anticipated expiration: 2029-01-16
Also published as: CN101478140A

Abstract

The invention relates to a self-release three-phase combined type overvoltage protector which comprises four zinc oxide valve plates FR, wherein, one end of the first zinc oxide valve plate FR1, the second zinc oxide valve plate FR2 and the zinc oxide valve plate FR3 is respectively connected with the phase-A end, the phase-B end and the phase-C end of a protected device, the other end of the first zinc oxide valve plate FR1, the second zinc oxide valve plate FR2 and the zinc oxide valve plate FR3 is respectively connected with the fourth zinc oxide valve plate FR4 in series, the other end of the zinc oxide valve plate FR4 is grounded, a release device BK is connected among the first zinc oxide valve plate FR1, the second zinc oxide valve plate FR2, the zinc oxide valve plate FR3 and a discharging gap CG in series, and the release device BK is sleeved on the first zinc oxide valve plate FR1, the second zinc oxide valve plate FR2 and the zinc oxide valve plate FR3. By modifying the release device, and on the basis of the original space, the release device is sleeved on the zinc oxide valve plates, so that the defect of limitation caused by the insufficient scene space is overcome, and the installation is convenient.

Description

A kind of self-disengaging three phase combined over-voltage protector

Technical field

The present invention relates to a kind of self-disengaging three phase combined over-voltage protector.

Background technology

At present, though indoor combination overvoltage protector can resolution system alternate and relatively superpotential problem, can not thoroughly realize the purpose of system safety; Combination overvoltage protector causes the phase fault accident owing to the aging resonance overvoltage that exists can let protector collapse, and causes the combination overvoltage protector blast; Therefore, it is necessary using combination overvoltage protector, for the safety of system; Make protector withdraw from fault, promptly the disengaging function of protector is important too.

Though the scheme comparative maturity of overvoltage protection device series connection release; Can solve overvoltage protection device because of aging problem of exploding; But it is implemented the place and only is confined to the open air, for the overvoltage protection device of indoor use; Especially combination overvoltage protector, the scene does not have the installing space of release.Present release roughly is divided into drop type, heat explosion type and hot melten type, and the former two belongs to has the motion space demand, and the overvoltage protection device that has only hot melten type (promptly using current limiting fuse) notion to meet in the cabinet uses; But because the constraint in on-the-spot space, the current limiting fuse of arbitrary form all can't be implemented to install at present.Therefore, on the solution of overvoltage protection, because site space can't be accomplished complete enforcement.

Summary of the invention

The object of the present invention is to provide and a kind ofly can overcome the self-disengaging three phase combined over-voltage protector that spatial constraints, inside are equipped with current limiting fuse.

For realizing above-mentioned purpose; A kind of self-disengaging three phase combined over-voltage protector provided by the invention comprises four zinc oxide valve plates, and wherein an end of first, second and third zinc oxide valve plate connects respectively by A, B, the C three phase terminals of protection equipment; The other end of first, second and third zinc oxide valve plate is connected with the discharging gap assembly respectively; The other end of discharging gap assembly is connected with the 4th zinc oxide valve plate, the other end ground connection of the 4th zinc oxide valve plate, the release unit of connecting between described first, second and third zinc oxide valve plate and the discharging gap assembly; Release unit comprises first, second and third fuse; Fuse comprises tubular bracket, and the melt helical form of fuse is looped around on the outer surface of support, and first, second and third fuse is set in respectively on first, second and third zinc oxide valve plate.

The present invention, is set in release unit on the zinc oxide valve plate on the former basis that has living space through release unit is improved, and has overcome because of the not enough restriction that is brought of site space, is convenient to install.

Description of drawings

Fig. 1 is the structural representation of fuse among the present invention;

Fig. 2 is an external structure sketch map of the present invention;

Fig. 3 is the A-A cutaway view of Fig. 2;

Fig. 4 is the left view of Fig. 2;

Fig. 5 is an electrical schematic diagram of the present invention;

Fig. 6 is the present invention and extraneous sketch map of communicating by letter.

Embodiment

A kind of self-disengaging three phase combined over-voltage protector; Comprise four zinc oxide valve plate FR; Wherein the end of first, second and third zinc oxide valve plate FR1, FR2, FR3 connects respectively by A, B, the C three phase terminals of protection equipment; The other end of first, second and third zinc oxide valve plate FR1, FR2, FR3 is connected with discharging gap assembly CG respectively, and the other end of discharging gap assembly CG is connected with the 4th zinc oxide valve plate FR4, the other end ground connection of the 4th zinc oxide valve plate FR4; Release unit BK connects between described first, second and third zinc oxide valve plate FR1, FR2, FR3 and the discharging gap assembly CG; Release unit BK comprises first, second and third fuse BK1, BK2, BK3, and fuse comprises pipe shape support 2, and melt 4 helical forms of fuse are looped around on the outer surface of support 2; It is last that first, second and third fuse BK1, BK2, BK3 are set in first, second and third zinc oxide valve plate FR1, FR2, FR3 respectively, like Fig. 3, shown in 5.

In conjunction with Fig. 1,2,3; Described release unit BK comprises first, second and third fuse BK1, BK2, BK3; Fuse comprises the square shell 1 of hollow, and pipe shape support 2 is set in the shell 1, and shell 1 is the flame retardant plastics member with support 2; The outside of shell 1 is provided with single-stage high voltage cable 5 downwards and draws, and upwards is provided for the fusing indication 6 of indicating fuse state.

The outer surface of support 2 is provided with spiral helicine protruding 3; Along being interrupted the layout bayonet socket in the raceway groove of protruding 3 formations; Banded non-constant section melt 4 be stuck on the bayonet socket and in the shape of a spiral shape be looped around on the outer surface of support 2, banded non-constant section melt 4 has narrow neck at interval, narrow neck quantity is by the predetermined pressure relative set of moving; The radial dimension of support 2 hollow parts and the radial dimension of zinc oxide valve plate FR match, and the line between zinc oxide valve plate FR and the fuse is through the insulating barrier between the two.This nested structure has strengthened the diameter of fuse on the one hand, is guaranteeing enough drop-out voltages, promptly under the enough situation of fusible core length, has reduced the height of fuse; On the other hand, shell 1 and support 2 are set to hollow form, it can be applied mechanically with zinc oxide valve plate FR, reduced overall height, when accomplishing over-voltage protection function, in limited space, arrange fuse simply and easily.

In conjunction with Fig. 2,3,4; Described release unit BK and in the zinc oxide valve plate FR that inlays all be arranged in the housing 10; First, second and third zinc oxide valve plate FR1, FR2, FR3 upwards are provided with respectively and the terminal 11 that joins that is linked to each other by protection equipment; The terminal 11 that joins is emerging in the top of housing 10, and the 4th zinc oxide valve plate FR4 draws the ground binding post 12 that is connected with ground, and ground binding post 12 is emerging in the side of housing 10.

In conjunction with Fig. 2,3,4; Described discharging gap assembly CG is formed in parallel by first, second, third and fourth discharging gap CG1, CG2, CG3, CG4, first, second and third discharging gap CG1, CG2, CG3 be arranged in first, second and third fuse BK1, BK2, BK3 under.The side of first, second and third discharging gap CG1, CG2, CG3 is provided with sample resistance 13; Sample resistance 13 is fixed in the housing 10; Also set firmly launch-box 14 in the housing 10 and be used to receive the receiving box 15 that 14 of launch-box send signal; Also be provided with the LED lamp on the housing 10, be used for the state of indicating fuse, its effect is equal to fusing indication 6.When the LED lamp is bright, show that fuse does not fuse; When the LED lamp goes out, show fuse blows.Install leakage current sample resistance 13 additional at the discharging gap place; The leakage current of an artificial faint microampere order of manufacturing is collected its energy through launch-box 14, and launch-box sends a signal to receiving box 15 on the one hand; For the LED lamp provides power supply, adopt intermittent mode to light the LED lamp on the other hand.

Do further description below in conjunction with Fig. 5,6 couples of the present invention.

Sample resistance 13 takes out energy and sends in the launch-box 14, and launch-box 14 minutes three tunnel stores energy respectively, and intermittence is lighted corresponding LED lamp respectively; As characterization; Wherein the LED lamp can be used as directly flicker on housing 10 of light source, also can be used as the source ends of optical fiber, through optical fiber light signal is sent to optical-electrical converter; Optical-electrical converter is through the state monitor of the internal data line output signal of telecommunication to outside; Make outside state monitor possess discharge counting, the disconnector break-make function of indication in real time, outside state monitor utilizes communication interface and fieldbus again, and the signal of telecommunication is delivered to computer background; Can realize the real-time detection of operating state of the present invention, avoid field condition and patrol and examine the asynchronous guard mode mistakes and omissions problem that causes.

In a word, core of the present invention is that the structure of fuse is set to hollow form, and fuse is set on the zinc oxide valve plate FR, has realized the nested arrangement of fuse and zinc oxide valve plate FR, has overcome the spatial constraints of overvoltage protection device to fuse.

Claims

1. self-disengaging three phase combined over-voltage protector; Comprise four zinc oxide valve plates (FR); Wherein an end of first, second and third zinc oxide valve plate (FR1, FR2, FR3) connects respectively by A, B, the C three phase terminals of protection equipment; The other end of first, second and third zinc oxide valve plate (FR1, FR2, FR3) is connected with discharging gap assembly (CG) respectively; The other end of discharging gap assembly (CG) is connected with the 4th zinc oxide valve plate (FR4), and the other end ground connection of the 4th zinc oxide valve plate (FR4) is characterized in that: the release unit (BK) of connecting between described first, second and third zinc oxide valve plate (FR1, FR2, FR3) and the discharging gap assembly (CG); Release unit (BK) comprises first, second and third fuse (BK1, BK2, BK3); Fuse comprises tubular bracket (2), and the melt of fuse (4) helical form is looped around on the outer surface of support (2), and first, second and third fuse (BK1, BK2, BK3) is set in respectively on first, second and third zinc oxide valve plate (FR1, FR2, FR3).

2. self-disengaging three phase combined over-voltage protector according to claim 1; It is characterized in that: described fuse comprises the square shell (1) of hollow; Support (2) is set in the shell (1), and the outer surface of support (2) is provided with spiral helicine convexity (3), along being interrupted the layout bayonet socket in the raceway groove of protruding (3) formation; Melt (4) is banded non-constant section shape and is stuck on the bayonet socket that the radial dimension of support (2) hollow part and the radial dimension of zinc oxide valve plate (FR) match.

3. self-disengaging three phase combined over-voltage protector according to claim 2 is characterized in that: described banded non-constant section melt (4) has narrow neck at interval.

4. self-disengaging three phase combined over-voltage protector according to claim 2; It is characterized in that: described shell (1) is the flame retardant plastics member with support (2); The outside of shell (1) is provided with single-stage high voltage cable (5) downwards and draws, and upwards is provided for the fusing indication (6) of indicating fuse state.

5. self-disengaging three phase combined over-voltage protector according to claim 2; It is characterized in that: described release unit (BK) and in the zinc oxide valve plate (FR) inlayed all be arranged in the housing (10); First, second and third zinc oxide valve plate (FR1, FR2, FR3) upwards is provided with respectively and the terminal that joins (11) that is linked to each other by protection equipment; The terminal (11) that joins is emerging in the outside of housing (10); The 4th zinc oxide valve plate (FR4) is drawn ground binding post (12), and ground binding post (12) is emerging in the side of housing (10).

6. self-disengaging three phase combined over-voltage protector according to claim 1 and 2; It is characterized in that: described discharging gap assembly (CG) is formed in parallel by first, second, third and fourth discharging gap (CG1, CG2, CG3, CG4), first, second and third discharging gap (CG1, CG2, CG3) be arranged in first, second and third fuse (BK1, BK2, BK3) under.

7. self-disengaging three phase combined over-voltage protector according to claim 6; It is characterized in that: the side of described first, second and third discharging gap (CG1, CG2, CG3) is provided with sample resistance (13); Sample resistance (13) is fixed in the housing (10); The receiving box (15) that also sets firmly launch-box (14) in the housing (10) and be used to receive launch-box (14) signal that sends, housing is provided with the LED lamp on (10).