CN205621699U - Combination switch equipment of earthing switch and circuit breaker is kept apart to three stations - Google Patents
Combination switch equipment of earthing switch and circuit breaker is kept apart to three stations Download PDFInfo
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- CN205621699U CN205621699U CN201521108691.3U CN201521108691U CN205621699U CN 205621699 U CN205621699 U CN 205621699U CN 201521108691 U CN201521108691 U CN 201521108691U CN 205621699 U CN205621699 U CN 205621699U
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Abstract
The utility model discloses a combination switch equipment of earthing switch and circuit breaker is kept apart to three stations, include: the top welding of flexible coupling 23 is in the bottom that keeps apart ground connection moving contact 22 to constitute a set of moving contact electrical connection structure, the three moving contact electrical connection structure of group are fixed in side by side and keep apart in the earthing switch insulating housing 21, each is connected the bottom of the three moving contact electrical connection structure's of group flexible coupling 23 with three -phase breaker 1's a circuit breaker incoming wire terminal 13 electricity to each is connected every circuit breaker incoming wire terminal 13 with 23 electricity of a flexible coupling, the isolation ground connection moving contacts 22 of keeping apart 4 drives on the earthing switch main shaft, the three moving contact electrical connection structure of group carry out the switching at isolator static contact 24, unsettled isolation position and earthing switch static contact between 25. The utility model discloses compact structure, save space, reduced adapting unit, improved electrical connection's security, reliability and stability, reduced the trouble and taken place the probability, practiced thrift the cost, improved production efficiency.
Description
Technical field
This utility model relates to switch cubicle technical field, particularly relates to the cubicle switch equipment of a kind of three-station isolating grounding switch and chopper.
Background technology
In existing switch cubicle, chopper, disconnecting switch and earthed switch are all the critical elements in an electric loop.Chopper is mainly made up of parts such as chopper insulating part, arc-extinguishing chamber of circuit breaker, chopper input terminal (also commonly known as terminals on chopper), circuit breaker outlet terminal (also commonly known as terminals under chopper), circuit breaker operation mechanisms, and disconnecting switch and earthed switch are independent disconnecting link structure mostly；Mostly it is connected by the hard bus such as copper bar between chopper with disconnecting switch, and hard between bus and disconnecting switch and be to be attached by spring press structure between bus and chopper firmly.
In order to ABC three-phase electricity is carried out switching simultaneously, be typically provided with in switch cubicle one for the three-phase isolation switch of three-phase electricity deciliter and one for the three-phase breaker to three-phase electricity deciliter；The primary structure of three-phase breaker includes three arc-extinguishing chamber of circuit breaker, three chopper input terminals, three circuit breaker outlet terminals, a breaker main shaft and a set of circuit breaker operation mechanism, the moving contact of three arc-extinguishing chamber of circuit breaker is all connected on breaker main shaft, circuit breaker operation mechanism can drive breaker main shaft to rotate, such that it is able to realize chopper ABC three-phase electricity to be carried out switching simultaneously；The primary structure of three-phase isolation switch includes three static contact isolation switches, three disconnecting switch moving contacts, a disconnecting switch main shaft and a set of isolator operating mechanism, three disconnecting switch moving contacts are all connected on disconnecting switch main shaft by a series of drive disk assemblies, disconnecting switch main shaft can be driven to rotate by isolator operating mechanism, such that it is able to realize disconnecting switch ABC three-phase electricity to be carried out switching simultaneously.
Development along with science and technology, existing switch cubicle uses three-station isolating grounding switch mostly, it incorporates the function of disconnecting switch and earthed switch, it is possible to moves to three different stations by an isolation ground connection moving contact and realizes disconnecting switch combined floodgate, disconnecting switch separating brake and grounding function.The isolation ground connection moving contact of existing three-station isolating grounding switch is made up of two symmetrical blade of knife switch mostly, the top of the two blade of knife switch is for carrying out switching between three different stations, and the bottom of the two blade of knife switch is hinged with moving contact mounting seat, and use elastic hold-down mechanism to compress, so that realize connecting by " face relying on elastic hold-down mechanism contacts " between bottom and the moving contact mounting seat of isolation ground connection moving contact.
By the structure of chopper, disconnecting switch and earthed switch in above-mentioned existing switch cubicle it can be seen that chopper, disconnecting switch and earthed switch in existing switch cubicle at least have the disadvantage in that
First, in existing switch cubicle, chopper, disconnecting switch and earthed switch are separate device mostly, not only take up room big, and connecting link between chopper and disconnecting switch is more, the poor reliability of electrical connection, loop resistance are big, heating is big, there is bigger potential safety hazard.
2nd, is in existing switch cubicle, the disconnecting switch moving contact of disconnecting switch needs just to can connect on isolated switch main axle by a series of drive disk assemblies, and each interconnective position of drive disk assembly is likely to become trouble point, this improves the probability broken down undoubtedly, adds potential safety hazard.
3rd, in existing switch cubicle, the isolation ground connection moving contact of three-station isolating grounding switch needs just to can connect to an electric loop via moving contact mounting seat and moving contact terminals successively, therefore the parts existed between isolation ground connection moving contact and an electric loop are more, and the position that each parts are connected is likely to become trouble point, which not only improves the probability broken down, and add potential safety hazard.
4th, in existing switch cubicle, connected mode between isolation ground connection moving contact and the moving contact mounting seat of three-station isolating grounding switch is " face relying on elastic hold-down mechanism contacts ", if the therefore elastic instability of the holddown spring of elastic hold-down mechanism own, or the compression degree of holddown spring is too small when assembling, or holddown spring is because being heated and flexibility decrease, so between isolation ground connection moving contact and moving contact mounting seat, loose contact easily occurs, contact resistance increases, the problems such as heating change is big, especially when passing through or closing short circuit current, this loose contact may seriously jeopardize equipment and personal security.
4th, in existing switch cubicle, the moving contact mounting seat requirement on machining accuracy of three-station isolating grounding switch is high, and working (machining) efficiency is relatively low.
Summary of the invention
For above-mentioned weak point of the prior art, this utility model provides the cubicle switch equipment of a kind of three-station isolating grounding switch and chopper, not only compact conformation, save chopper, disconnecting switch, the space that earthed switch is shared in switch cubicle, and decrease the connection member between chopper and disconnecting switch and between isolation ground connection moving contact and disconnecting switch main shaft, thus improve the safety of electrical connection between three-station isolating grounding switch self and three-station isolating grounding switch and chopper, reliability and stability, reduce the probability broken down, material cost and processing cost are saved, improve production efficiency.
The purpose of this utility model is achieved through the following technical solutions:
A kind of three-station isolating grounding switch and the cubicle switch equipment of chopper, be used for being connected in a major loop and earth-return circuit, including: three-phase breaker 1, three-station isolating grounding switch 2 and isolation earthing switch main shaft 4；Three-station isolating grounding switch 2 includes isolation earthing switch insulation shell 21, isolation ground connection moving contact 22, be flexible coupling 23, static contact isolation switch 24 and static contact of grounding switch 25；Be flexible coupling 23 top be welded on the bottom of isolation ground connection moving contact 22, thus constitute one group of moving contact connecting structure for electrical equipment；Three groups of moving contact connecting structure for electrical equipment are fixed in side by side in isolation earthing switch insulation shell 21, and often in group moving contact connecting structure for electrical equipment, isolation ground connection moving contact 22 top stretched out by the top of isolation earthing switch insulation shell 21, be flexible coupling 23 bottom stretched out by the bottom of isolation earthing switch insulation shell 21；Three groups of moving contact connecting structure for electrical equipment be flexible coupling 23 bottom respectively electrically connect with a chopper input terminal 13 of three-phase breaker 1, and each chopper input terminal 13 of three-phase breaker 1 each be flexible coupling with one 23 electrically connect；Isolation earthing switch main shaft 4 is fixed on the two ends of isolation earthing switch insulation shell 21, and drives the isolation ground connection moving contact 22 of three groups of moving contact connecting structure for electrical equipment to carry out switching between static contact isolation switch 24, unsettled isolated bit and static contact of grounding switch 25.
Preferably, be flexible coupling 23 bottom directly electrically connected with the chopper input terminal 13 of three-phase breaker 1 by conducting bolt 3.
Preferably, described isolation ground connection moving contact 22 includes plug-in strip folder 22a, studs 22b, clamp nut 22c and holddown spring 22d；The bottom of plug-in strip folder 22a 23 welds together with being flexible coupling, and the top of plug-in strip folder 22a is for contacting with static contact isolation switch 11 and static contact of grounding switch 61；The top of plug-in strip folder 22a includes two symmetrical blade of knife switch；Studs 22b passes two symmetrical blade of knife switch, and studs 22b be respectively arranged at the two ends with one group of clamp nut 22c and holddown spring 22d, thus constitute the elastic hold-down mechanism of plug-in strip folder 22a.
Preferably, be flexible coupling 23 two ends, be flexible coupling 23 the most silver-plated or tin plating with the isolation solder joint of ground connection moving contact 22 and whole isolation ground connection moving contact 22.
Preferably, described it is flexible coupling 23 employing bare copper wires or stannum copper litz wire is colded pressing and formed.
Preferably, static contact isolation switch 24 directly electrically connects with the bus in a major loop or the conductor in sleeve pipe, and static contact of grounding switch 25 directly electrically connects with the earth bus in earth-return circuit.
Preferably, described isolation earthing switch insulation shell 21 includes three moving contact housing 21a and two reel 21b；Often group moving contact connecting structure for electrical equipment is fixed in different moving contact housing 21a, and often in group moving contact connecting structure for electrical equipment, isolation ground connection moving contact 22 top stretched out by the top of moving contact housing 21a, be flexible coupling 23 bottom stretched out by the bottom of moving contact housing 21a；The two ends, left and right of each moving contact housing 21a are equipped with union joint 21c；Three moving contact housing 21a are chained together by union joint 21c, and the moving contact housing 21a of high order end connects fixing by the union joint 21c and a reel 21b of its left end, and the moving contact housing 21a of low order end is connected fixing by the union joint 21c and another reel 21b of its right-hand member；Isolation earthing switch main shaft 4 includes two sections, and the outside with two reel 21b is coaxially fixedly mounted with respectively.
nullThe technical scheme provided by above-mentioned this utility model can be seen that，Three of three-station isolating grounding switch 2 are flexible coupling and 23 directly electrically connect with a chopper input terminal 13 of three-phase breaker 1 respectively by the cubicle switch equipment of the three-station isolating grounding switch that this utility model embodiment is provided and chopper，And the top of each chopper input terminal 13 of three-phase breaker 1 is each to be flexible coupling with one and 23 electrically connects，It is achieved thereby that three-station isolating grounding switch is connected as one with three-phase breaker 1，And be flexible coupling between 23 with chopper input terminal 13 is to electrically connect not over other cables，This not only saves space shared in switch cubicle，And decrease the connection member between three-station isolating grounding switch and three-phase breaker 1，Avoid the shortcomings that " face relying on elastic hold-down mechanism contacts " this connected mode occurs between three-station isolating grounding switch with three-phase breaker 1，It is thus possible to effectively reduce the mechanical shock to an electric loop，The number reduced the fault point，Reduce fault occurrence probability，Improve electrical connection reliability、Stability and safety.Simultaneously, three groups of moving contact connecting structure for electrical equipment of three-station isolating grounding switch 2 are directly fixed in side by side in isolation earthing switch insulation shell 21 by this three-station isolating grounding switch with the cubicle switch equipment of chopper, and isolation earthing switch main shaft 4 is fixed on the two ends of isolation earthing switch insulation shell 21, therefore in addition to isolation earthing switch insulation shell 21, other connection members are not contained between isolation earthing switch main shaft 4 and isolation ground connection moving contact 22, which reduce the connection member between isolation earthing switch main shaft 4 and isolation ground connection moving contact 22, thus be possible not only to improve switching precision and switching speed, and decrease trouble point number, reduce fault occurrence probability.In addition, this three-station isolating grounding switch uses 23 modes welded with isolation ground connection moving contact 22 that are flexible coupling to instead of in prior art based on moving contact mounting seat and the connecting structure for electrical equipment of moving contact terminals with the cubicle switch equipment of chopper, due to be flexible coupling 23 have softness characteristic, therefore when isolating ground connection moving contact 22 and moving with isolation earthing switch main shaft 4,23 need bending in various degree that is flexible coupling welded with isolation ground connection moving contact 22；Which reduce the connection member between isolation ground connection moving contact 22 and three-phase breaker 1, and be flexible coupling between 23 with isolation ground connection moving contact 22 and avoid the shortcomings of employing " face relying on elastic hold-down mechanism contacts " this connected mode, such that it is able to effectively reduce the mechanical shock to an electric loop, reduce fault occurrence probability, improve connection reliability and stability, save production cost.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of this utility model embodiment, in describing embodiment below, the required accompanying drawing used is briefly described, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, from the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawings according to these accompanying drawings.
The structural representation one of the cubicle switch equipment of the three-station isolating grounding switch that Fig. 1 is provided by this utility model embodiment and chopper.
The structural representation two of the cubicle switch equipment of the three-station isolating grounding switch that Fig. 2 is provided by this utility model embodiment and chopper.
The structural representation one of the three-station isolating grounding switch that Fig. 3 is provided by this utility model embodiment.
The structural representation two of the three-station isolating grounding switch that Fig. 4 is provided by this utility model embodiment.
The structural representation three of the three-station isolating grounding switch that Fig. 5 is provided by this utility model embodiment.
The structural representation one of the isolation ground connection moving contact 22 that Fig. 6 is provided by this utility model embodiment.
The structural representation two of the isolation ground connection moving contact 22 that Fig. 7 is provided by this utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on embodiment of the present utility model, the every other embodiment that those of ordinary skill in the art are obtained under not paying creative work premise, broadly fall into protection domain of the present utility model.
Firstly the need of illustrate it is; described in present specification " on ", D score, "left", "right", " top ", " end " etc. with directive words and phrases merely to the relative position relation more clearly from represented between parts; when placement direction changes; on " ", D score, "left", "right", " top ", the direction such as " end " also can change therewith, but this still falls within the protection domain of the application.Below the cubicle switch equipment of three-station isolating grounding switch provided by the utility model with chopper is described in detail.
As shown in Figures 1 to 7, a kind of three-station isolating grounding switch and the cubicle switch equipment of chopper, for being connected in a major loop and earth-return circuit, its concrete structure includes: three-phase breaker 1, three-station isolating grounding switch 2 and isolation earthing switch main shaft 4；Three-station isolating grounding switch 2 includes isolation earthing switch insulation shell 21, isolation ground connection moving contact 22, be flexible coupling 23, static contact isolation switch 24 and static contact of grounding switch 25；Be flexible coupling 23 top be welded on the bottom of isolation ground connection moving contact 22, thus constitute one group of moving contact connecting structure for electrical equipment；Three groups of moving contact connecting structure for electrical equipment are fixed in side by side in isolation earthing switch insulation shell 21, and often in group moving contact connecting structure for electrical equipment, isolation ground connection moving contact 22 top stretched out by the top of isolation earthing switch insulation shell 21, be flexible coupling 23 bottom stretched out by the bottom of isolation earthing switch insulation shell 21；Three groups of moving contact connecting structure for electrical equipment be flexible coupling 23 bottom respectively electrically connect with a chopper input terminal 13 of three-phase breaker 1, and each chopper input terminal 13 of three-phase breaker 1 each be flexible coupling with one 23 electrically connect；Isolation earthing switch main shaft 4 is fixed on the two ends of isolation earthing switch insulation shell 21, and drives the isolation ground connection moving contact 22 of three groups of moving contact connecting structure for electrical equipment to carry out switching between static contact isolation switch 24, unsettled isolated bit and static contact of grounding switch 25.Static contact isolation switch 24 is for directly electrically connecting with the bus in a major loop or the conductor in sleeve pipe, and static contact of grounding switch 25 is for directly electrically connecting with the earth bus in earth-return circuit.
Specifically, the cubicle switch equipment of this three-station isolating grounding switch and chopper can include following embodiment:
(1) as depicted in figs. 1 and 2, the primary structure of three-phase breaker 1 can include 11, three arc-extinguishing chamber of circuit breaker of three chopper insulating parts, 13, three circuit breaker outlet terminals of 12, three chopper input terminals, a breaker main shaft 5 and a set of circuit breaker operation mechanism 7；Arc-extinguishing chamber of circuit breaker 12 and chopper input terminal 13 are located in chopper insulating part 11, and the bottom of chopper input terminal 13 electrically connects with one end of arc-extinguishing chamber of circuit breaker 12, and the top of chopper input terminal 13 is stretched out by the top of chopper insulating part 11；The moving contact of three arc-extinguishing chamber of circuit breaker 12 is all connected on breaker main shaft 5, and circuit breaker operation mechanism 7 can drive breaker main shaft 5 to rotate, such that it is able to realize this three-phase breaker 1 ABC three-phase electricity to be carried out switching simultaneously.nullThree of three-station isolating grounding switch 2 be flexible coupling 23 bottom directly electrically connect with a chopper input terminal 13 of three-phase breaker 1 respectively，And the top of each chopper input terminal 13 of three-phase breaker 1 is each to be flexible coupling with one and 23 electrically connects，It is achieved thereby that three-station isolating grounding switch is connected as one with three-phase breaker 1，And be flexible coupling between 23 with chopper input terminal 13 is to electrically connect not over other cables，This not only reduces the connection member between three-station isolating grounding switch and three-phase breaker 1，And avoid the shortcomings that " face relying on elastic hold-down mechanism contacts " this connected mode occurs between three-station isolating grounding switch with three-phase breaker 1，Can effectively reduce the mechanical shock to an electric loop，The number reduced the fault point，Reduce fault occurrence probability，Improve electrical connection reliability、Stability and safety.
In actual applications, be flexible coupling 23 bottom directly electrically connect with the chopper input terminal 13 of three-phase breaker 1 preferably by conducting bolt 3, this is possible not only to ensure the reliability being electrically connected that is flexible coupling between 23 and chopper input terminal 13, and can effectively reduce the connection member being flexible coupling between 23 and chopper input terminal 13, it also avoid the employing that is flexible coupling between 23 with chopper input terminal 13 " face relying on elastic hold-down mechanism contacts " this connected mode simultaneously, thus be possible not only to ensure that the electrical connection between three-station isolating grounding switch and three-phase breaker 1 is more safe and reliable, and reduce contact resistance, decrease caloric value, this can make the cubicle switch equipment of this three-station isolating grounding switch and chopper reach the dual purpose of electrical safety and energy-saving and emission-reduction.
null(2) such as Fig. 1、Fig. 2、Fig. 3、Shown in Fig. 4 and Fig. 5，Owing to three groups of moving contact connecting structure for electrical equipment of three-station isolating grounding switch 2 are fixed in side by side in isolation earthing switch insulation shell 21，And it is respectively the most non-conductive between group moving contact connecting structure for electrical equipment，And isolation earthing switch main shaft 4 is fixed on the two ends of isolation earthing switch insulation shell 21，Therefore when isolation earthing switch main shaft 4 rotates，Isolation earthing switch insulation shell 21 can rotate under the drive of isolation earthing switch main shaft 4，And the three groups of moving contact connecting structure for electrical equipment being fixed in isolation earthing switch insulation shell 21 can move with isolation earthing switch insulation shell 21 under the drive of isolation earthing switch insulation shell 21，Thus the isolation ground connection moving contact 22 that isolation earthing switch operating mechanism 6 need to drive isolation earthing switch main shaft 4 rotation just can realize three groups of moving contact connecting structure for electrical equipment carries out switching to ABC three-phase electricity simultaneously.In this course, isolation earthing switch main shaft 4 is directly to drive isolation earthing switch insulation shell 21, and isolation earthing switch insulation shell 21 is directly to drive isolation ground connection moving contact 22, therefore in addition to isolation earthing switch insulation shell 21, other connection members are not contained between isolation earthing switch main shaft 4 and isolation ground connection moving contact 22, which reduce the connection member between isolation earthing switch main shaft 4 and isolation ground connection moving contact 22, thus be possible not only to improve this three-station isolating grounding switch switching precision when carrying out three station switchings and switch speed, and reduce the trouble point number between isolation earthing switch main shaft 4 and isolation ground connection moving contact 22, reduce fault occurrence probability, improve electrical connection reliability, stability and safety, also save production cost simultaneously.
(3) as shown in Fig. 3, Fig. 4 and Fig. 5, described isolation earthing switch insulation shell 21 includes three moving contact housing 21a and two reel 21b；Often group moving contact connecting structure for electrical equipment is fixed in different moving contact housing 21a, and often in group moving contact connecting structure for electrical equipment, isolation ground connection moving contact 22 top stretched out by the top of moving contact housing 21a, be flexible coupling 23 bottom stretched out by the bottom of moving contact housing 21a；The two ends, left and right of each moving contact housing 21a are equipped with union joint 21c；Three moving contact housing 21a are chained together by union joint 21c, and the moving contact housing 21a of high order end connects fixing by the union joint 21c and a reel 21b of its left end, and the moving contact housing 21a of low order end is connected fixing by the union joint 21c and another reel 21b of its right-hand member；Isolation earthing switch main shaft 4 includes two sections, and wherein one section is the powered phase axle of isolation earthing switch main shaft 4, and the other end is driven section of axle of isolation earthing switch main shaft 4, and these two sections of axles outside with two reel 21b respectively is coaxially fixedly mounted with.This first one group of moving contact connecting structure for electrical equipment and a moving contact housing 21a are processed as one, moving contact housing 21a, reel 21b and isolation earthing switch main shaft 4 are assembled into the processing mode of a complete three-station isolating grounding switch again, it is possible not only in batch production improve working (machining) efficiency, and this three-station isolating grounding switch can be made to be readily transported, install and safeguard.
(4) due to be flexible coupling 23 have softness characteristic, therefore when isolating ground connection moving contact 22 and rotating with isolation earthing switch main shaft 4,23 need bending in various degree that is flexible coupling welded with isolation ground connection moving contact 22, which overcome in prior art the parts existing for moving contact articulated manner too much, to problems such as an electric loop mechanical shock are excessive, such that it is able to reduce the fault point, reduce probability that this three-station isolating grounding switch breaks down, increase the service life.
In actual applications, it is flexible coupling and 23 colds pressing form preferably with Copper Foil or stannum copper litz wire, these 23 electric currents that can carry bigger load that are possible not only to make to be flexible coupling, and can ensure that to be flexible coupling 23 there is good flexibility, thus when isolating ground connection moving contact 22 and carrying out divide-shut brake action, can effectively reduce the mechanical shock to an electric loop, reduce probability that disconnecting switch breaks down, increase the service life.
(5) as shown in Fig. 5, Fig. 6 and Fig. 7, be flexible coupling 23 top be welded on the bottom (top herein and bottom are the relative position relations described with content shown in Fig. 5) of isolation ground connection moving contact 22, this be possible not only to ensure to be flexible coupling 23 with the connection reliability of isolation ground connection moving contact 22, and can be prevented effectively to be flexible coupling the shortcomings of " face relying on elastic hold-down mechanism contacts " this connected mode occurs between 23 with isolation ground connection moving contact 22.In actual applications, be flexible coupling 23 two ends, be flexible coupling 23 the most silver-plated or tin plating with the isolation solder joint of ground connection moving contact 22 and whole isolation ground connection moving contact 22, this be possible not only to improve isolation ground connection moving contact 22 and be flexible coupling 23 electric conductivity, effectively reduce contact resistance, and can be greatly improved isolation ground connection moving contact 22 and be flexible coupling 23 oxidation resistance, thus reduce fault occurrence probability, increase the service life.
(6) as shown in Fig. 5, Fig. 6 and Fig. 7, described isolation ground connection moving contact 22 includes plug-in strip folder 22a, studs 22b, clamp nut 22c and holddown spring 22d (this holddown spring 22d can use compression spring or disc spring)；The bottom of plug-in strip folder 22a 23 welds together with being flexible coupling, and the top of plug-in strip folder 22a is for contacting with static contact isolation switch 24 and static contact of grounding switch 25；The top of plug-in strip folder 22a includes two symmetrical blade of knife switch；Studs 22b passes two symmetrical blade of knife switch, and studs 22b be respectively arranged at the two ends with one group of clamp nut 22c and holddown spring 22d, thus constitute the elastic hold-down mechanism of plug-in strip folder 22a.When clamp nut 22c is to the middle part precession of studs 22b, holddown spring 22d passes to the pressure of blade of knife switch and increases, and the chucking power of the two blade of knife switch strengthens, such that it is able to improve the chucking power of plug-in strip folder 22a.
In actual applications, when this three-station isolating grounding switch is in disconnecting switch combined floodgate station, static contact isolation switch 24 can be clipped in the middle by two symmetrical blade of knife switch of plug-in strip folder 22a front end, the two blade of knife switch preferably can contact with static contact isolation switch 24 under clamp nut 22c with the inside pressuring action of holddown spring 22d such that it is able to improves the reliability being connected between isolation ground connection moving contact 22 and static contact isolation switch 24.When this three-station isolating grounding switch is in earthed switch combined floodgate station, static contact of grounding switch 25 can be clipped in the middle by two symmetrical blade of knife switch of plug-in strip folder 22a front end, the two blade of knife switch preferably can contact with static contact of grounding switch 25 under clamp nut 22c with the inside pressuring action of holddown spring 22d such that it is able to improves the reliability being connected between isolation ground connection moving contact 22 and static contact of grounding switch 25.
Further, the three-station isolating grounding switch that this utility model embodiment is provided is as follows with the raw material of the cubicle switch equipment of chopper:
null(1) the cubicle switch equipment of this three-station isolating grounding switch and chopper three of three-station isolating grounding switch 2 are flexible coupling 23 bottom directly electrically connect with a chopper input terminal 13 of three-phase breaker 1 respectively，And the top of each chopper input terminal 13 of three-phase breaker 1 is each to be flexible coupling with one and 23 electrically connects，It is achieved thereby that three-station isolating grounding switch is connected as one with three-phase breaker 1，And be flexible coupling between 23 with chopper input terminal 13 is to electrically connect not over other cables，This not only reduces the connection member between three-station isolating grounding switch and three-phase breaker 1，And avoid the shortcomings occurring using " face relying on elastic hold-down mechanism contacts " this connected mode between three-station isolating grounding switch with three-phase breaker 1，Can effectively reduce the mechanical shock to an electric loop，The number reduced the fault point，Reduce fault occurrence probability，Improve electrical connection reliability、Stability and safety.
null(2) three groups of moving contact connecting structure for electrical equipment of three-station isolating grounding switch 2 are directly fixed in side by side in isolation earthing switch insulation shell 21 by this three-station isolating grounding switch with the cubicle switch equipment of chopper，And isolation earthing switch main shaft 4 is fixed on the two ends of isolation earthing switch insulation shell 21，Therefore when isolation earthing switch main shaft 4 rotates，Isolation earthing switch insulation shell 21 can rotate under the drive of isolation earthing switch main shaft 4，And the three groups of moving contact connecting structure for electrical equipment being fixed in isolation earthing switch insulation shell 21 can move with isolation earthing switch insulation shell 21 under the drive of isolation earthing switch insulation shell 21，It is achieved thereby that the isolation ground connection moving contact 22 of three groups of moving contact connecting structure for electrical equipment closes a floodgate in disconnecting switch、Disconnecting switch separating brake、Switching between three stations of ground connection.In addition to isolation earthing switch insulation shell 21, other connection members are not contained between isolation earthing switch main shaft 4 and isolation ground connection moving contact 22, which reduce the connection member between isolation earthing switch main shaft 4 and isolation ground connection moving contact 22, thus be possible not only to improve this three-station isolating grounding switch switching precision when carrying out three station switchings and switch speed, and reduce the trouble point number between isolation earthing switch main shaft 4 and isolation ground connection moving contact 22, reduce fault occurrence probability, improve electrical connection reliability, stability and safety, also save production cost simultaneously.
(3) this three-station isolating grounding switch uses 23 modes welded with isolation ground connection moving contact 22 that are flexible coupling to instead of in prior art based on moving contact mounting seat and the connecting structure for electrical equipment of moving contact terminals with the cubicle switch equipment of chopper, due to be flexible coupling 23 have softness characteristic, therefore when isolating ground connection moving contact 22 and moving with isolation earthing switch main shaft 4,23 need bending in various degree that is flexible coupling welded with isolation ground connection moving contact 22；Which reduce the connection member between isolation ground connection moving contact 22 and three-phase breaker 1, and be flexible coupling and between 23 with isolation ground connection moving contact 22, avoid the shortcomings occurring using " face relying on elastic hold-down mechanism contacts " this connected mode, thus it is possible not only to when isolating ground connection moving contact 22 and carrying out divide-shut brake action, effectively reduce the mechanical shock to an electric loop, and the number that can reduce the fault point, reduce fault occurrence probability, improve connection reliability and stability, requirement to machining accuracy also declines to a great extent, also a saving material cost and processing cost simultaneously, improve production efficiency.
As fully visible, this utility model embodiment not only compact conformation, save the space that chopper, disconnecting switch, earthed switch are shared in switch cubicle, and decrease the connection member between chopper and disconnecting switch and between isolation ground connection moving contact and disconnecting switch main shaft, thus improve the safety of electrical connection, reliability and stability between three-station isolating grounding switch self and three-station isolating grounding switch and chopper, reduce the probability broken down, save material cost and processing cost, improve production efficiency.
The above; it is only this utility model preferably detailed description of the invention; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; the change that can readily occur in or replacement, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (7)
1. a three-station isolating grounding switch and the cubicle switch equipment of chopper, for being connected in a major loop and earth-return circuit, it is characterized in that, including: three-phase breaker (1), three-station isolating grounding switch (2) and isolation earthing switch main shaft (4)；
Three-station isolating grounding switch (2) includes isolation earthing switch insulation shell (21), isolation ground connection moving contact (22), be flexible coupling (23), static contact isolation switch (24) and static contact of grounding switch (25)；The be flexible coupling top of (23) is welded on the bottom of isolation ground connection moving contact (22), thus constitutes one group of moving contact connecting structure for electrical equipment；Three groups of moving contact connecting structure for electrical equipment are fixed in side by side in isolation earthing switch insulation shell (21), and often in group moving contact connecting structure for electrical equipment, the top of isolation ground connection moving contact (22) is stretched out by the top of isolation earthing switch insulation shell (21), and the bottom of be flexible coupling (23) is stretched out by the bottom of isolation earthing switch insulation shell (21)；
The bottom of be flexible coupling (23) of three groups of moving contact connecting structure for electrical equipment respectively electrically connects with a chopper input terminal (13) of three-phase breaker (1), and each chopper input terminal (13) each be flexible coupling with (23) of three-phase breaker (1) electrically connects；
Isolation earthing switch main shaft (4) is fixed on the two ends of isolation earthing switch insulation shell (21), and drives isolation ground connection moving contact (22) of three groups of moving contact connecting structure for electrical equipment to carry out switching between static contact isolation switch (24), unsettled isolated bit and static contact of grounding switch (25).
Three-station isolating grounding switch the most according to claim 1 and the cubicle switch equipment of chopper, it is characterized in that, the bottom of be flexible coupling (23) is directly electrically connected with the chopper input terminal (13) of three-phase breaker (1) by conducting bolt (3).
Three-station isolating grounding switch the most according to claim 1 and 2 and the cubicle switch equipment of chopper, it is characterized in that, described isolation ground connection moving contact (22) includes plug-in strip folder (22a), studs (22b), clamp nut (22c) and holddown spring (22d)；
The bottom of plug-in strip folder (22a) welds together be flexible coupling (23), and the top of plug-in strip folder (22a) is for contacting with static contact isolation switch (11) and static contact of grounding switch (61)；
The top of plug-in strip folder (22a) includes two symmetrical blade of knife switch；Studs (22b) passes two symmetrical blade of knife switch, and studs (22b) be respectively arranged at the two ends with one group of clamp nut (22c) and holddown spring (22d), thus constitute the elastic hold-down mechanism of plug-in strip folder (22a).
Three-station isolating grounding switch the most according to claim 1 and 2 and the cubicle switch equipment of chopper, it is characterized in that, the two ends of be flexible coupling (23), be flexible coupling (23) are the most silver-plated or tin plating with the solder joint of isolation ground connection moving contact (22) and whole isolation ground connection moving contact (22).
Three-station isolating grounding switch the most according to claim 1 and 2 and the cubicle switch equipment of chopper, it is characterised in that described be flexible coupling (23) use bare copper wire or stannum copper litz wire to cold pressing and form.
Three-station isolating grounding switch the most according to claim 1 and 2 and the cubicle switch equipment of chopper, it is characterized in that, static contact isolation switch (24) directly electrically connects with the bus in a major loop or the conductor in sleeve pipe, and static contact of grounding switch (25) directly electrically connects with the earth bus in earth-return circuit.
Three-station isolating grounding switch the most according to claim 1 and 2 and the cubicle switch equipment of chopper, it is characterized in that, described isolation earthing switch insulation shell (21) includes three moving contact housings (21a) and two reels (21b)；
Often group moving contact connecting structure for electrical equipment is fixed in different moving contact housings (21a), and often in group moving contact connecting structure for electrical equipment, the top of isolation ground connection moving contact (22) is stretched out by the top of moving contact housing (21a), and the bottom of be flexible coupling (23) is stretched out by the bottom of moving contact housing (21a)；
The two ends, left and right of each moving contact housing (21a) are equipped with union joint (21c)；Three moving contact housings (21a) are chained together by union joint (21c), and the moving contact housing (21a) of high order end is connected fixing by the union joint (21c) of its left end with a reel (21b), and the moving contact housing (21a) of low order end is connected fixing by the union joint (21c) of its right-hand member with another reel (21b)；
Isolation earthing switch main shaft (4) includes two sections, and the outside with two reels (21b) is coaxially fixedly mounted with respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108691.3U CN205621699U (en) | 2015-12-28 | 2015-12-28 | Combination switch equipment of earthing switch and circuit breaker is kept apart to three stations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108691.3U CN205621699U (en) | 2015-12-28 | 2015-12-28 | Combination switch equipment of earthing switch and circuit breaker is kept apart to three stations |
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| Publication Number | Publication Date |
|---|---|
| CN205621699U true CN205621699U (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521108691.3U Active CN205621699U (en) | 2015-12-28 | 2015-12-28 | Combination switch equipment of earthing switch and circuit breaker is kept apart to three stations |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137024A (en) * | 2019-06-06 | 2019-08-16 | 现代重工(中国)电气有限公司 | A kind of novel high speed grounding switch |
| CN112750648A (en) * | 2020-12-28 | 2021-05-04 | 川铁电气（天津）股份有限公司 | Novel GW7-252 isolating switch conducting structure |
-
2015
- 2015-12-28 CN CN201521108691.3U patent/CN205621699U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110137024A (en) * | 2019-06-06 | 2019-08-16 | 现代重工(中国)电气有限公司 | A kind of novel high speed grounding switch |
| CN112750648A (en) * | 2020-12-28 | 2021-05-04 | 川铁电气（天津）股份有限公司 | Novel GW7-252 isolating switch conducting structure |
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