CN205452136U - Three -station isolation grounding switch - Google Patents
Three -station isolation grounding switch Download PDFInfo
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- CN205452136U CN205452136U CN201521108645.3U CN201521108645U CN205452136U CN 205452136 U CN205452136 U CN 205452136U CN 201521108645 U CN201521108645 U CN 201521108645U CN 205452136 U CN205452136 U CN 205452136U
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- moving contact
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- isolation
- flexible coupling
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Abstract
The utility model discloses a three -station isolation grounding switch, include: the top welding of flexible coupling (25) is in the bottom that keeps apart ground connection moving contact (21) to constitute a set of moving contact electrical connection structure, three group's moving contact electrical connection structures are fixed in in insulating housing (5) side by side to it stretches out by insulating housing (5) top to keep apart ground connection moving contact (21) top, the both ends of insulating housing (5) are fixed in in driving spindle (4) to it carries out the switching to drive isolation ground connection moving contact (21) between isolator static contact (11), unsettled isolation position and earthing switch static contact (61), during the bottom of isolator static contact (11) and flexible coupling (25) is connected to major loop, and earthing switch static contact (61) are connected to among the ground loop. The utility model discloses reduce " face contact " link and adapting unit, improved electrical connection's security, reliability and stability, reduced the probability that breaks down, practiced thrift the cost, improved production efficiency.
Description
Technical field
This utility model relates to switch cubicle technical field, particularly relates to a kind of three-station isolating grounding switch.
Background technology
In switch cubicle, disconnecting switch and earthed switch are all the critical elements in an electric loop, especially disconnecting switch, it not only needs to carry rated continuous current, specified KA Rms and specified making current, and needs to meet requirements such as connecting reliably, stability is high, contact resistance is little.
In traditional switch cubicle, disconnecting switch and earthed switch are independent cutter brake structure mostly.As it is shown in figure 1, the concrete structure of disconnecting switch may include that static contact 11, static contact terminals 12, static contact supports insulative 13, moving contact 21, moving contact terminals 22, moving contact supports insulative 23, moving contact mounting seat 24 and base 3；Static contact supports insulative 13 and moving contact supports insulative 23 are each attached on base 3；Static contact 11 is fixed on the top of static contact supports insulative 13, and static contact terminals 12 are fixed on static contact 11, and static contact 11 is connected to an electric loop by static contact terminals 12；The tail end of moving contact 21 is hinged with moving contact mounting seat 24, and moving contact mounting seat 24 is fixed on the top of moving contact supports insulative 23, moving contact terminals 22 are fixed in moving contact mounting seat 24, and the hinged end of moving contact 21 is connected to an electric loop via moving contact mounting seat 24 and moving contact terminals 22.In order to enable disconnecting switch ABC three-phase electricity be carried out switching simultaneously, switch cubicle is typically provided with disconnecting switch drive shaft, ABC three-phase electricity carries out switching by different moving contacts respectively, and three moving contacts 21 are all connected in disconnecting switch drive shaft by a series of actuating device, thus only need to rotate disconnecting switch drive shaft and just can realize ABC three-phase electricity being 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；Moving contact mounting seat is clipped in the middle by two blade of knife switch of isolation ground connection moving contact, and a studs passes the two blade of knife switch and moving contact mounting seat, thus by hinged with moving contact mounting seat for the tail end of isolation ground connection moving contact；The two ends of studs are typically provided with the elastic hold-down mechanism being made up of holddown spring and clamp nut such that it is able to enable two blade of knife switch of isolation ground connection moving contact preferably to contact with moving contact mounting seat.But in this connecting structure for electrical equipment of existing three-station isolating grounding switch, the hinged end of isolation ground connection moving contact needs just to can connect to an electric loop via moving contact mounting seat and moving contact terminals successively, and isolating the electric connection mode that have employed " face contacts " between two blade of knife switch of ground connection moving contact and moving contact mounting seat, this at least has the disadvantage in that
First, the contact pressure between blade of knife switch and the moving contact mounting seat of isolation ground connection moving contact can be had a strong impact on by holddown spring outside blade of knife switch；If elastic poor or the holddown spring when assembling the compression degree of holddown spring itself is too small 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, the problems such as contact resistance increases, heating change is big, especially when passing through or closing short circuit current, this loose contact may seriously jeopardize equipment and personal security.
Second, 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, and this improves the probability broken down, and potential safety hazard is big.
3rd, the moving contact mounting seat requirement on machining accuracy of existing 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 a kind of three-station isolating grounding switch, not only reduce " face contact " link between isolation ground connection moving contact and an electric loop, and decrease the connection member between isolation ground connection moving contact and an electric loop, thus improve the safety of this three-station isolating grounding switch electrical connection, reliability and stability, reduce the probability that isolation earthing switch breaks down, save material cost and processing cost, improve production efficiency.
The purpose of this utility model is achieved through the following technical solutions:
A kind of three-station isolating grounding switch, is connected in a major loop and the earth-return circuit of switch cubicle, including: static contact isolation switch 11, isolation ground connection moving contact 21, be flexible coupling 25, drive shaft 4, insulation shell 5 and static contact of grounding switch 61；Be flexible coupling 25 top be welded on the bottom of isolation ground connection moving contact 21, 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 insulation shell 5, and often group moving contact connecting structure for electrical equipment in, isolation ground connection moving contact 21 top stretched out by the top of insulation shell 5, be flexible coupling 25 bottom stretched out by the bottom of insulation shell 5；Drive shaft 4 is fixed on the two ends of insulation shell 5, and drives the isolation ground connection moving contact 21 of three groups of moving contact connecting structure for electrical equipment to carry out switching between static contact isolation switch 11, unsettled isolated bit and static contact of grounding switch 61；Static contact isolation switch 11 and be flexible coupling 25 bottom be connected in a major loop, and static contact of grounding switch 61 is connected in earth-return circuit.
Preferably, described isolation ground connection moving contact 21 includes plug-in strip folder 211, studs 212, clamp nut 213 and holddown spring 214；The bottom of plug-in strip folder 211 25 welds together with being flexible coupling, and the top of plug-in strip folder 211 is for contacting with static contact isolation switch 11 and static contact of grounding switch 61；The top of plug-in strip folder 211 includes two symmetrical blade of knife switch；Studs 212 through two symmetrical blade of knife switch, and studs 212 be respectively arranged at the two ends with one group of clamp nut 213 and holddown spring 214, thus constitute the elastic hold-down mechanism of plug-in strip folder 211.
Preferably, be flexible coupling 25 two ends, be flexible coupling 25 the most silver-plated or tin plating with the isolation solder joint of ground connection moving contact 21 and whole isolation ground connection moving contact 21.
Preferably, be flexible coupling 25 bottom directly electrically connect with the conductor in bus, chopper, on-load switch, voltage transformer, current transformer or the sleeve pipe in an electric loop.
Preferably, described it is flexible coupling 25 employing bare copper wires or stannum copper litz wire is colded pressing and formed.
Preferably, static contact isolation switch 11 directly electrically connects with the bus in a major loop or the conductor in sleeve pipe；And static contact of grounding switch 61 directly electrically connects with the earth bus in earth-return circuit.
Preferably, described insulation shell 5 includes three moving contact housings 51 and two reels 52；Often group moving contact connecting structure for electrical equipment is fixed in different moving contact housings 51, and often in group moving contact connecting structure for electrical equipment, isolation ground connection moving contact 21 top stretched out by the top of moving contact housing 51, be flexible coupling 25 bottom stretched out by the bottom of moving contact housing 51；The two ends, left and right of each moving contact housing 51 are equipped with union joint 53；Three moving contact housings 51 are chained together by union joint 53, and the moving contact housing 51 of high order end is connected fixing by the union joint 53 of its left end with a reel 52, and the moving contact housing 51 of low order end is connected fixing by the union joint 53 of its right-hand member with another reel 52；Drive shaft 4 includes two sections, and the outside with two reels 52 is coaxially fixedly mounted with respectively.
The technical scheme provided by above-mentioned this utility model can be seen that, three isolation ground connection moving contacts 21 have directly been fixed in insulation shell 5 by three-station isolating grounding switch that this utility model embodiment is provided side by side, and drive shaft 4 is fixed on the two ends of insulation shell 5, therefore, when Spin Control drive shaft 4, insulation shell 5 can drive isolation ground connection moving contact 21 to carry out switching between static contact isolation switch 11, unsettled isolated bit and static contact of grounding switch 61；This is possible not only to improve this three-station isolating grounding switch switching precision between disconnecting switch combined floodgate, disconnecting switch separating brake, three stations of ground connection and switch speed, and required parts are less, simple in construction, easy to operate, decrease trouble point, reduce fault occurrence probability.nullSimultaneously，This three-station isolating grounding switch uses 25 modes welded with isolation ground connection moving contact 21 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，Which reduce the studs between isolation ground connection moving contact 21 and an electric loop、Holddown spring、Clamp nut、Moving contact mounting seat 24、The connection members such as moving contact terminals 22，And be flexible coupling and between 25 with isolation ground connection moving contact 21, avoid the shortcomings of employing " face contacts "，Thus be possible not only to when isolating ground connection moving contact 21 and carrying out divide-shut brake action，Effectively reduce the mechanical shock to an electric loop，And the number of trouble point can be decreased，Reduce fault occurrence probability，Improve connection reliability and stability，Material cost and processing cost are saved，Improve production efficiency.
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.
Fig. 1 is the structural representation of disconnecting switch in prior art.
The structural representation one of the three-station isolating grounding switch that Fig. 2 is provided by this utility model embodiment.
The structural representation two of the three-station isolating grounding switch that Fig. 3 is provided by this utility model embodiment.
The structural representation three of the three-station isolating grounding switch that Fig. 4 is provided by this utility model embodiment.
The moving contact connecting structure for electrical equipment schematic diagram one of the three-station isolating grounding switch that Fig. 5 is provided by this utility model embodiment.
The moving contact connecting structure for electrical equipment schematic diagram two of the three-station isolating grounding switch that Fig. 6 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; "left", "right" described in present specification, " top ", " end " etc. with directive words and phrases merely to the relative position relation more clearly from represented between parts; when placement direction changes; the direction such as "left", "right", " top ", " end " also can change therewith, but this still falls within the protection domain of the application.Below three-station isolating grounding switch provided by the utility model is described in detail.
Embodiment one
As shown in Figures 2 to 6, a kind of three-station isolating grounding switch, being connected in a major loop and the earth-return circuit of switch cubicle, its concrete structure includes: static contact isolation switch 11, isolation ground connection moving contact 21, be flexible coupling 25, drive shaft 4, insulation shell 5 and static contact of grounding switch 61；Be flexible coupling 25 top be welded on the bottom of isolation ground connection moving contact 21, 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 insulation shell 5, and respectively organize between moving contact connecting structure for electrical equipment the most non-conductive；In often organizing moving contact connecting structure for electrical equipment, isolation ground connection moving contact 21 top stretched out by the top of insulation shell 5, be flexible coupling 25 bottom stretched out by the bottom of insulation shell 5；Drive shaft 4 is fixed on the two ends of insulation shell 5, and drives the isolation ground connection moving contact 21 of three groups of moving contact connecting structure for electrical equipment to carry out switching between static contact isolation switch 11, unsettled isolated bit and static contact of grounding switch 61；Static contact isolation switch 11 and be flexible coupling 25 bottom be connected in a major loop, and static contact of grounding switch 61 is connected in earth-return circuit.
Specifically, this three-station isolating grounding switch can include following embodiment:
(1) static contact isolation switch 11 directly electrically connects with the bus in a major loop of switch cubicle or the conductor in sleeve pipe, and static contact of grounding switch 61 directly electrically connects with the earth bus in the earth-return circuit of switch cubicle.Owing to isolation ground connection moving contact 21 has directly been fixed in insulation shell 5 by this three-station isolating grounding switch side by side, and drive shaft 4 is fixed on the two ends of insulation shell 5, therefore when Spin Control drive shaft 4, insulation shell 5 also can concomitant rotation, and drive isolation ground connection moving contact 21 between static contact isolation switch 11, unsettled isolated bit and static contact of grounding switch 61, carry out switching；Such as: as in figure 2 it is shown, when isolating ground connection moving contact 21 and contacting with static contact isolation switch 11, this three-station isolating grounding switch is in disconnecting switch combined floodgate station；If now rotating counterclockwise drive shaft 4, then insulation shell 5 also can drive isolation ground connection moving contact 21 to rotate counterclockwise, and when isolating ground connection moving contact 21 and moving to unsettled isolated bit, this three-station isolating grounding switch enters disconnecting switch separating brake station；If now continuing to rotate counterclockwise drive shaft 4, so insulation shell 5 also can drive isolation ground connection moving contact 21 to continue to rotate counterclockwise, when isolating ground connection moving contact 21 and moving to contact with static contact of grounding switch 61, this three-station isolating grounding switch enters ground connection station.Drive shaft 4, insulation shell 5 and this attachment structure isolating ground connection moving contact 21, it is possible not only to improve this three-station isolating grounding switch switching precision between disconnecting switch combined floodgate, disconnecting switch separating brake, three stations of ground connection and switch speed, and required parts are less, simple in construction, easy to operate, decrease trouble point, reduce fault occurrence probability.
(2) as shown in Figure 2, Figure 3 and Figure 4, insulation shell 5 includes three moving contact housings 51 and two reels 52；Often group moving contact connecting structure for electrical equipment is fixed in different moving contact housings 51, and often in group moving contact connecting structure for electrical equipment, isolation ground connection moving contact 21 top stretched out by the top of moving contact housing 51, be flexible coupling 25 bottom stretched out by the bottom of moving contact housing 51；The two ends, left and right of each moving contact housing 51 are equipped with union joint 53；Three moving contact housings 51 are chained together by union joint 53, and the moving contact housing 51 of high order end is connected fixing by the union joint 53 of its left end with a reel 52, and the moving contact housing 51 of low order end is connected fixing by the union joint 53 of its right-hand member with another reel 52；Drive shaft 4 includes two sections, and wherein one section is the powered phase axle of drive shaft 4, and the other end is driven section of axle of drive shaft 4, and these two sections of axles outside with two reels 52 respectively is coaxially fixedly mounted with.This first one group of moving contact connecting structure for electrical equipment and a moving contact housing 51 are processed as one, moving contact housing 51, reel 52 and drive 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.
(3) due to be flexible coupling 25 have softness characteristic, therefore when isolating ground connection moving contact 21 and rotating with drive shaft 4,25 need bending in various degree that is flexible coupling welded with isolation ground connection moving contact 21, 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 25 colds pressing form preferably with Copper Foil or stannum copper litz wire, these 25 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 25 there is good flexibility, thus when isolating ground connection moving contact 21 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.
(4) as shown in Figure 4, Figure 5 and Figure 6, be flexible coupling 25 top be welded on the bottom (top herein and bottom are the relative position relations described with content shown in Fig. 4) of isolation ground connection moving contact 21, this be possible not only to ensure to be flexible coupling 25 with the connection reliability of isolation ground connection moving contact 21, and can be prevented effectively to be flexible coupling the shortcomings of " face contacts " occurs between 25 with isolation ground connection moving contact 21.In actual applications, be flexible coupling 25 two ends, be flexible coupling 25 the most silver-plated or tin plating with the isolation solder joint of ground connection moving contact 21 and whole isolation ground connection moving contact 21, this be possible not only to improve isolation ground connection moving contact 21 and be flexible coupling 25 electric conductivity, effectively reduce contact resistance, and can be greatly improved isolation ground connection moving contact 21 and be flexible coupling 25 oxidation resistance, thus reduce fault occurrence probability, increase the service life.
(5) as shown in Figure 4, Figure 5 and Figure 6, be flexible coupling 25 bottom (bottom herein be with content shown in Fig. 4 describe relative position relation) can first carry out compaction treatment, and silver-plated or tin plating, more directly electrically connect with the conductor in bus, chopper, on-load switch, voltage transformer, current transformer or the sleeve pipe in an electric loop；The electrical connection being flexible coupling between bottom and an electric loop of 25 can use welds, the connected mode of " face contact " can also be used, such as: be flexible coupling 25 bottom directly can weld (such as: use argon arc welding of the prior art or brazing technology to weld) with the conductor in bus, chopper, on-load switch, voltage transformer, current transformer or the sleeve pipe in an electric loop, such that it is able to constitute an electric loop together with other electrical equipment.
(6) as shown in Figure 4, Figure 5 and Figure 6, isolation ground connection moving contact 21 can include plug-in strip folder 211, studs 212, clamp nut 213 and holddown spring 214 (this holddown spring 214 can use compression spring or disc spring)；The bottom of plug-in strip folder 211 25 welds together with being flexible coupling, and the top of plug-in strip folder 211 is for contacting with static contact isolation switch 11 and static contact of grounding switch 61；The top of plug-in strip folder 211 includes two symmetrical blade of knife switch；Studs 212 through two symmetrical blade of knife switch, and studs 212 be respectively arranged at the two ends with one group of clamp nut 213 and holddown spring 214, thus constitute the elastic hold-down mechanism of plug-in strip folder 211；When clamp nut 213 is to the middle part precession of studs 212, holddown spring 214 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 211.
In actual applications, when this three-station isolating grounding switch is in disconnecting switch combined floodgate station, plug-in strip presss from both sides two symmetrical blade of knife switch of 211 front ends and can be clipped in the middle by static contact isolation switch 11, the two blade of knife switch preferably can contact with static contact isolation switch 11 under clamp nut 213 with the inside pressuring action of holddown spring 214 such that it is able to improves the reliability being connected between isolation ground connection moving contact 21 and static contact isolation switch 11.When this three-station isolating grounding switch is in earthed switch combined floodgate station, plug-in strip presss from both sides two symmetrical blade of knife switch of 211 front ends and can be clipped in the middle by static contact of grounding switch 61, the two blade of knife switch preferably can contact with static contact of grounding switch 61 under clamp nut 213 with the inside pressuring action of holddown spring 214 such that it is able to improves the reliability being connected between isolation ground connection moving contact 21 and static contact of grounding switch 61.
Further, the principle of the three-station isolating grounding switch that this utility model embodiment is provided is as follows:
(1) three isolation ground connection moving contacts 21 have directly been fixed in insulation shell 5 by this three-station isolating grounding switch side by side, and drive shaft 4 is fixed on the two ends of insulation shell 5, therefore, when Spin Control drive shaft 4, insulation shell 5 can drive isolation ground connection moving contact 21 to carry out switching between static contact isolation switch 11, unsettled isolated bit and static contact of grounding switch 61；This is possible not only to improve this three-station isolating grounding switch switching precision between disconnecting switch combined floodgate, disconnecting switch separating brake, three stations of ground connection and switch speed, and required parts are less, simple in construction, easy to operate, decrease trouble point, reduce fault occurrence probability.
(2) this three-station isolating grounding switch uses 25 modes welded with isolation ground connection moving contact 21 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, due to be flexible coupling 25 have softness characteristic, therefore when isolating ground connection moving contact 21 and moving with drive shaft 4,25 need bending in various degree that is flexible coupling welded with isolation ground connection moving contact 21；Which reduce the studs between isolation ground connection moving contact 21 and an electric loop, holddown spring, clamp nut, moving contact mounting seat 24, the connection members such as moving contact terminals 22, and be flexible coupling and between 25 with isolation ground connection moving contact 21, avoid the shortcomings of employing " face contacts ", thus it is possible not only to when isolating ground connection moving contact 21 and carrying out divide-shut brake action, effectively reduce the mechanical shock to an electric loop, and the number of trouble point can be decreased, reduce fault occurrence probability, improve connection reliability and stability, requirement to machining accuracy declines to a great extent, material cost and processing cost are saved, improve production efficiency.
As fully visible, this utility model embodiment not only reduces " face contact " link between isolation ground connection moving contact and an electric loop, and decrease the connection member between isolation ground connection moving contact and an electric loop, thus improve the safety of this three-station isolating grounding switch electrical connection, reliability and stability, reduce the probability that isolation earthing switch breaks 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, it is connected in a major loop and the earth-return circuit of switch cubicle, it is characterized in that, including: static contact isolation switch (11), isolation ground connection moving contact (21), be flexible coupling (25), drive shaft (4), insulation shell (5) and static contact of grounding switch (61)；
The be flexible coupling top of (25) is welded on the bottom of isolation ground connection moving contact (21), 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 insulation shell (5), and often in group moving contact connecting structure for electrical equipment, the top of isolation ground connection moving contact (21) is stretched out by the top of insulation shell (5), and the bottom of be flexible coupling (25) is stretched out by the bottom of insulation shell (5)；
Drive shaft (4) is fixed on the two ends of insulation shell (5), and drives isolation ground connection moving contact (21) of three groups of moving contact connecting structure for electrical equipment to carry out switching between static contact isolation switch (11), unsettled isolated bit and static contact of grounding switch (61)；
The bottom of static contact isolation switch (11) and be flexible coupling (25) is connected in a major loop, and static contact of grounding switch (61) is connected in earth-return circuit.
Three-station isolating grounding switch the most according to claim 1, it is characterized in that, described isolation ground connection moving contact (21) includes plug-in strip folder (211), studs (212), clamp nut (213) and holddown spring (214)；
The bottom of plug-in strip folder (211) welds together be flexible coupling (25), and the top of plug-in strip folder (211) is for contacting with static contact isolation switch (11) and static contact of grounding switch (61)；
The top of plug-in strip folder (211) includes two symmetrical blade of knife switch；Studs (212) passes two symmetrical blade of knife switch, and studs (212) be respectively arranged at the two ends with one group of clamp nut (213) and holddown spring (214), thus constitute the elastic hold-down mechanism of plug-in strip folder (211).
Three-station isolating grounding switch the most according to claim 1 and 2, it is characterized in that, the two ends of be flexible coupling (25), be flexible coupling (25) are the most silver-plated or tin plating with the solder joint of isolation ground connection moving contact (21) and whole isolation ground connection moving contact (21).
Three-station isolating grounding switch the most according to claim 1 and 2, it is characterized in that, the bottom of be flexible coupling (25) directly electrically connects with the conductor in bus, chopper, on-load switch, voltage transformer, current transformer or the sleeve pipe in an electric loop.
Three-station isolating grounding switch the most according to claim 1 and 2, it is characterised in that described be flexible coupling (25) 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, it is characterised in that static contact isolation switch (11) directly electrically connects with the bus in a major loop or the conductor in sleeve pipe；And static contact of grounding switch (61) directly electrically connects with the earth bus in earth-return circuit.
Three-station isolating grounding switch the most according to claim 1 and 2, it is characterised in that described insulation shell (5) includes three moving contact housings (51) and two reels (52)；
Often group moving contact connecting structure for electrical equipment is fixed in different moving contact housings (51), and often in group moving contact connecting structure for electrical equipment, the top of isolation ground connection moving contact (21) is stretched out by the top of moving contact housing (51), and the bottom of be flexible coupling (25) is stretched out by the bottom of moving contact housing (51)；
The two ends, left and right of each moving contact housing (51) are equipped with union joint (53)；Three moving contact housings (51) are chained together by union joint (53), and the moving contact housing (51) of high order end is connected fixing by the union joint (53) of its left end with a reel (52), and the moving contact housing (51) of low order end is connected fixing by the union joint (53) of its right-hand member with another reel (52)；
Drive shaft (4) includes two sections, and the outside with two reels (52) is coaxially fixedly mounted with respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108645.3U CN205452136U (en) | 2015-12-28 | 2015-12-28 | Three -station isolation grounding switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521108645.3U CN205452136U (en) | 2015-12-28 | 2015-12-28 | Three -station isolation grounding switch |
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| CN205452136U true CN205452136U (en) | 2016-08-10 |
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| CN201521108645.3U Withdrawn - After Issue CN205452136U (en) | 2015-12-28 | 2015-12-28 | Three -station isolation grounding switch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405703A (en) * | 2015-12-28 | 2016-03-16 | 北京合纵科技股份有限公司 | Three-position isolating and grounding switch |
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2015
- 2015-12-28 CN CN201521108645.3U patent/CN205452136U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105405703A (en) * | 2015-12-28 | 2016-03-16 | 北京合纵科技股份有限公司 | Three-position isolating and grounding switch |
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