CN102074906B - Transformer neutral point combination electric equipment - Google Patents
Transformer neutral point combination electric equipment Download PDFInfo
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- CN102074906B CN102074906B CN2010105848521A CN201010584852A CN102074906B CN 102074906 B CN102074906 B CN 102074906B CN 2010105848521 A CN2010105848521 A CN 2010105848521A CN 201010584852 A CN201010584852 A CN 201010584852A CN 102074906 B CN102074906 B CN 102074906B
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Abstract
The invention discloses a transformer neutral point combination electric equipment, comprising a base which is equipped with an insulation supporting column, a grounding column and a grounding diversion column, wherein the insulation supporting column is equipped with a high-voltage arm and a high-voltage electrode; the high-voltage arm is equipped with a fixed small contact; the grounding column is equipped with a grounding arm and a grounding electrode; the grounding arm is coupled with a grounding sleeve; the grounding sleeve is connected to an opening/closing regulation mechanism; the grounding diversion column is connected to a fixed large contact via a diversion plate; the grounding sleeve is equipped with a movable large contact; the grounding sleeve is passed through the fixed large contact; the end part of the grounding sleeve is correspondingly connected to the fixed small contact; and the movable large contact is correspondingly connected to the fixed large contact. The transformer neutral point combination electric equipment provided by the invention has the advantages that the fixed large contact, the diversion plate and the opening/closing regulation mechanism can be protected by setting a protection cover without changing the position of the diversion plate and the fixed large contact so as to reduce the corrosion caused by the pollutants in the atmosphere to the parts can be reduced, the device is used as a neutral point disconnecting switch; and when the device is in a closed state, the contact resistance of the circuit is more stable.
Description
Technical field
The present invention relates to the power transmission technology category, is the transformer neutral point combined electrical apparatus device to present 110kV, the integrated equipment of required each the equipment item function combinations of 220kV transformer neutral point.
Background technology
Stipulate according to the power industry standard DL/T620-1997 of the People's Republic of China (PRC) " overvoltage protection of alternating-current electric device and insulation coordination "; 110kV, 220kV power network (hereinafter to be referred as electrical network) belong to useful earthing electric network; Promptly the voltage of (greatly) over the ground of neutral point of electric network is " 0 " or approach " 0 " when actual motion; The necessary effective grounding of the neutral point of this type of electrical network, the ground connection of neutral point of electric network is to realize through the ground connection of transformer neutral point in the electrical network.Then adopt selectivity ground connection operational mode during actual motion, i.e. during operation of power networks the neutral point of part transformer through the direct ground connection of neutral point isolating switch of special use, the then earth-free operation of the neutral point of remaining transformer.
So during the design of transformation station:
1, consider direct ground connection of change grounding mode of transformer neutral-point in service or not directly grounded needs, transformer neutral point must be installed the neutral point isolating switch and claim earthed switch again.
2, this type of electrical network forms local ungrounded electric net work because of certain reason is accidental; And when single phase ground fault takes place; Under this unusual service condition, electrical network possibly produce higher power-frequency overvoltage, and the safety of electric equipment in this electrical network is threatened; Press the regulation of DL/T620-1997, the neutral point of earth-free transformer should be installed clavate air conservation gap and claim excellent gap again for this reason.
3, in particular cases, consider the ability to bear of transformer neutral point to Lightning Over-voltage, also need install the neutral point metal oxide arrester, english abbreviation MOA is hereinafter to be referred as MOA at some.
Be commonly referred to as " neutral point equipment " at this equipment that will be installed in this type of transformer neutral point, promptly be installed in the device of transformer neutral point.
At present designing unit when the design of newly-built transformer station or manufacturing enterprise all dispose transformer neutral point equipment when transforming by mentioned above principle at old station; General transformer neutral point must be furnished with neutral point isolating switch and protection gap; Two equipment are in parallel installed with, and are as shown in Figure 1; Special transformer then is in parallel installed with by neutral point isolating switch, protection gap and three equipment of neutral point metal oxide arrester to be formed, as shown in Figure 2.Fig. 1, Fig. 2 are the Design Modes that generally adopts at present, and the left side is the neutral point isolating switch among Fig. 1, and the right side is the protection gap; The left side is the neutral point isolating switch among Fig. 2, and the centre is MOA, and the right side is the protection gap.
Neutral point isolating switch among the figure is generally GW13, and the protection gap has specialized factory to produce or self-control at the scene, the special-purpose MOA of the transformer neutral point that MOA then adopts specialized factory to produce.These devices are installed on the same channel-section steel support, and make it be in suitable height by one or two pillars, are electrically connected then.
There is following subject matter in this conventional design pattern:
1, it is not a Combination Design truly, only is that each function device is bolted together at the scene, and it is bigger to take up room, and equipment is from different manufacturing firms.
2, use the quantity of porcelain element many, as needing among Fig. 1 with three porcelain knobs; Need with four porcelain spares i.e. three porcelain knobs, the insulator of a MOA among Fig. 2.Thereby overall weight is big, and consumption porcelain resource is many.
3, whole device combination back longitudinal length is longer, is not suitable for the use at indoor and underground station such as 110kV.
4, GW13 series neutral point isolating switch is two pivoted arm opposite structures, and contact stabilization is not ideal enough.
5, reach 3.5m when above for the vertical spread length of equipment, must adopt the twin props mounting structure, basis and pillar expense are high.
Chinese invention patent (patent No. CN200920076275.8) discloses a kind of transformer neutral point combined electrical apparatus device for this reason; This device comprises a pedestal; Insulation support column, earthing rod and ground connection diversion column are set respectively on the pedestal, and the insulation support column is provided with a certain contact and a high-field electrode, and earthing rod is provided with a grounding sleeve and a grounding electrode; Grounding sleeve is enclosed within on the grounding electrode and with its insulation and is slidingly connected; Grounding sleeve is connected with an adjusting mechanism, also is provided with a moving contact on the grounding sleeve, and the ground connection diversion column is connected with grounding sleeve through a flexible conductor.This neutral point combined electrical apparatus device in use; Deciliter adjusting mechanism can drive grounding sleeve and move around, and when deciding contact and contact with moving contact, this device is one to be in the neutral point isolating switch of closure state; When deciding contact and separate with moving contact, this device is exactly the excellent gap of a protection.
This device can be combined into one neutral point isolating switch, protection gap and MOA three, and the floor space of equipment is diminished, and therefore the spy is applicable to the indoor substation of limited space system fully or is arranged in underground transformer station.But also there is a shortcoming in this transformer neutral point combined electrical apparatus device; Exactly when grounding sleeve moves around; Flexible conductor need be with the grounding sleeve moved back of coming together, so flexible conductor is difficult for fixingly, also is inconvenient to protect; Generally can only be exposed in the air and move, the contaminated easily and corrosion in the junction between flexible conductor and ground connection diversion column, the grounding sleeve.When serious meteorological disaster weather occurring, will reduce the device reliability of operation, when being in closure state as the neutral point isolating switch simultaneously, loop resistance being increased, and then might influence the normal operation of whole device.
Summary of the invention
To the deficiency of above-mentioned prior art, the technical problem that the present invention will solve provides that a kind of simple in structure, switching mechanism is compact more, the stable transformer neutral point combined electrical apparatus device of loop contact resistance.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of transformer neutral point combined electrical apparatus device; Comprise a pedestal, said pedestal is provided with insulation support column, an earthing rod and a ground connection diversion column, and said insulation support column is connected with a high-field electrode through a high-voltage arm; Said high-voltage arm is provided with one and decides contact for a short time; Said earthing rod is connected with a grounding electrode through a grounding arm, and said grounding electrode and said high-field electrode are positioned on the same horizontal linear and are positioned opposite to each other, socket one grounding sleeve on the said grounding arm; Said grounding sleeve and the insulation of said grounding arm are slidingly connected; Deciliter adjusting mechanism that said grounding sleeve and can make this ground connection pipe box move around is connected, and said ground connection diversion column is decided contact greatly through a baffler and and is connected, and said grounding sleeve is provided with a big moving contact; The end of said grounding sleeve is passed and is saidly decided greatly contact and decide contacts mates and be connected for a short time with said, and said big moving contact is decided contacts mates and is connected greatly with said.
Preferably, be provided with insulating bushing between said grounding arm and the said grounding sleeve, make and realize the electricity isolation between grounding arm and the grounding sleeve.
Preferably, said insulation support column is porcelain knob or metal oxide arrester MOA.
It is preferably, said that little to decide contact, decide contact greatly be Mume flower contact.
Preferably, said high-field electrode is threaded with said high-voltage arm, and said grounding arm is threaded with said grounding electrode.
Preferably; Said deciliter adjusting mechanism comprises a vertical rotating shaft; The upper end of said rotating shaft is fixedly connected with the pivoted arm of a level; One end of pivoted arm is hinged through an end of the tranverse connecting rod of a pivoted arm end pin and a level, and the other end of said tranverse connecting rod is hinged through a sleeve end pin and said grounding sleeve, and the lower end of said rotating shaft is connected with a driving mechanism with a power transmission shaft.
Further, be with the rotating shaft column jecket in the said rotating shaft, said rotating shaft column jecket is connected with said pedestal.
Further again, between said pivoted arm and the said tranverse connecting rod, between said tranverse connecting rod and the grounding sleeve and all be provided with dielectric isolation layer between rotating shaft upper and lower side and the said rotating shaft column jecket.
Preferably, it comprises that also mechanism's protective cover and decides the contact protective cover for a short time, saidly decides contact greatly, baffler reaches a deciliter adjusting mechanism and is positioned at said mechanism protective cover, saidly decides contact and is positioned at the said little contact protective cover of deciding for a short time.
Preferably, said earthing rod is provided with a gap discharge loop current instrument transformer, and said ground connection diversion column is provided with a switch grounded circuit current transformer.
Technique scheme has following beneficial effect: this transformer neutral point combined electrical apparatus device in use; Pedestal is connected with earth mat; High-voltage arm is connected with the neutral point of transformer; When the end of grounding sleeve is decided contacts mates and is connected with little, big moving contact with decide contacts mates greatly when being connected, this device is the neutral point isolating switch of a closure; Move when driving a grounding sleeve through deciliter adjusting mechanism, the end that makes grounding sleeve with decide that contact breaks away from for a short time, big moving contact when deciding the contact disengaging greatly, this device promptly is one to protect excellent gap.The grounding sleeve of this device is in the process that moves around, and it is constant that baffler reaches the fixed-site of deciding contact greatly, so just a protective cover can be set; To decide contact, baffler and a deciliter adjusting mechanism greatly through this protective cover is closed and protects; Pollutant is to the erosion of these parts in the atmosphere to reduce, and this device uses as the neutral point isolating switch like this, when being in closure state; The contact resistance in its loop is more stable, and this device operation is also more reliable.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. specify as after.Embodiment of the present invention is provided by following examples and accompanying drawing thereof in detail.
Description of drawings
Fig. 1 is existing transformer neutral point isolating switch-protection gap on-site consolidation structural representation commonly used.
Fig. 2 is existing transformer neutral point isolating switch-protection gap-MOA on-site consolidation structural representation commonly used.
Fig. 3 is the structural representation that the present invention is in off-state.
Fig. 4 is the structural representation that the present invention is in closure state.
Reference numeral is following:
1, pedestal 20, mounting column
2, insulation support column 21, ground connection band iron
3, ground connection diversion column 22, switch grounded circuit current transformer CT
D
4, rotating shaft column jecket 23, gap discharge loop current instrument transformer CT
J
5, earthing rod 24, decide contact greatly
6, high-voltage connection plate 25, big moving contact
7, for a short time decide contact 26, decide the contact protective cover for a short time
8, high-field electrode 27, mechanism's protective cover
8 ', high-voltage arm N, transformer neutral point
9, grounding electrode J, protection gap
9 ', grounding arm E, ground network
10, grounding sleeve Z, decide contact conductive contact film and grounding sleeve end contact point for a short time
11, insulating bushing Z ', decide contact conductive contact film and big moving contact contact point greatly
12, baffler I
KE, when the neutral point isolating switch is closed by transformer neutral point N
13, the earth current of rotating shaft outflow
14, pivoted arm I
J, flow through gap and last during gap discharge and flow into putting of earth mat
15, pivoted arm end pin electricity electric current
16, the center line of tranverse connecting rod O-O high-field electrode and grounding electrode
17, sleeve end pin O
1-rotating shaft pivot
18, power transmission shaft O
2The hinged center of-pivoted arm end pin and tranverse connecting rod
19, high-voltage connection O
3The hinged center of-sleeve end pin and tranverse connecting rod
Embodiment
Below in conjunction with accompanying drawing preferred embodiment of the present invention is described in detail.
Like Fig. 3, shown in 4, this transformer neutral point combined electrical apparatus device comprises a pedestal 1, on the pedestal 1 from left to right respectively vertical fixing have the insulation support column 2, ground connection diversion column 3 and earthing rod 5.
Top at insulation support column 2 is fixed with high-voltage connection plate 6; High-voltage connection plate 6 left ends link to each other with transformer neutral point N through high-voltage connection 19; The right-hand member of high-voltage connection plate 6 connect the high-voltage arm 8 of a tubulose '; Connect high-field electrode 8 at high-voltage arm 8 ' right-hand member, high-field electrode 8 and high-voltage arm 8 ' between for being threaded.High-voltage connection 19 is fixed on the high-voltage connection plate 6 through screw, and high-voltage connection plate 6 is fixed on the insulation support column 2 through screw.High-voltage arm 8 ' on the little contact 7 of deciding is set, decide contact 7 and be Mume flower contact (or claiming cluster contact) for a short time.
Grounding sleeve 10 also is connected with an adjusting mechanism, deciliter adjusting mechanism can drive grounding sleeve 10 along grounding arm 9 ' axially horizontally slip.This deciliter adjusting mechanism can be preferably a toggle; It comprises the pivoted arm 14 and the tranverse connecting rod 16 of vertical rotating shaft 13, level; Pivoted arm 14 is vertically fixed in the rotating shaft 13; Pivoted arm 14 is hinged with an end of the tranverse connecting rod 16 of level through pivoted arm end pin 15, the other end of tranverse connecting rod 16 through sleeve end pin 17 be hinged on grounding sleeve 10 below.The lower end of rotating shaft 13 links to each other with a power transmission shaft 18, and power transmission shaft 18 is driven by actuating unit, along power transmission shaft 18 self axes O
1Rotation, actuating unit does not draw in the drawings.Rotating shaft 13 is limited in rotating in the rotating shaft column jecket 4, and simultaneously, the rotating shaft column jecket also provides support effect for rotating shaft 13, and rotating shaft column jecket 4 is fixed on the pedestal 1.
A baffler 12 is fixed at the top of ground connection diversion column 3, and baffler 12 and is decided contact 24 greatly and is connected, and deciding contact 24 greatly is a Mume flower contact, decides to constitute between contact 24, baffler 12, the ground connection diversion column 3 favorable conductive greatly and connects.The end of grounding sleeve 10 can be passed this and greatly decide the cavity of contact 24 and horizontally slip.Can be provided with a switch grounded circuit current transformer 22 on the ground connection diversion column 3,
This transformer neutral point combined electrical apparatus device can be divided into " branch ", " closing " two states through the move left and right of grounding sleeve 10.The little contact 7 of deciding is inserted in the end of grounding sleeve 10, and it is that transformer neutral point combined electrical apparatus device is in the state of " closing " that simultaneously big moving contact 25 inserts the state of deciding in the contact 24 greatly.Contact 7 is decided away from little in the end of grounding sleeve 10, and simultaneously big moving contact 25 is that transformer neutral point combined electrical apparatus device is in the state of " branch " away from the state of deciding contact 24 greatly.Wherein when " closing " state, decide the water conservancy diversion loop that contact 24, baffler 12, ground connection diversion column 3 are formed the neutral point isolating switch by high-voltage arm 8 ', little decide to be provided with on big moving contact 25 fixing on contact 7, grounding sleeve 10, the grounding sleeve 10, the baffler 12 big.The first winding contact of switch grounded circuit is formed in little end of deciding contact 7 and grounding sleeve 10, decides the second winding contact that big moving contact fixing on contact 24 and the grounding sleeve 10 25 constitutes the switch grounded circuits greatly.When this transformer neutral point combined electrical apparatus device is in " branch " state, form the protective gap of neutral point discharge loop by high-voltage arm 8 ', high-field electrode 8, grounding electrode 9, grounding arm 9 ', earthing rod 5.
The course of work: as shown in Figure 3, this transformer neutral point combined electrical apparatus device is in " branch " state, and the pivoted arm 14 of deciliter adjusting mechanism and pivoted arm end pin 15 are in low order end, through tranverse connecting rod 16 and sleeve end pin 17 grounding sleeve 10 is locked in low order end simultaneously.This moment is after the instruction that obtains " closing ", and is as shown in Figure 4, and the actuating unit of deciliter adjusting mechanism makes rotating shaft 13 drive pivoted arm 14 through power transmission shaft 18 and pivoted arm end pin 15 rotates in the horizontal plane direction.Pivoted arm end pin 15 drives tranverse connecting rod 16 simultaneously and is moved to the left; Under the drive of tranverse connecting rod 16, promote the axes O-O right-to-left slip of grounding sleeve 10 along grounding electrode 9 and high-field electrode 8 by sleeve end pin 17; Insert until the left part of grounding sleeve 10 and to decide to be mated connection in the contact 7 for a short time; The little conductive contact film of deciding contact 7 is closely contacted with the end of grounding sleeve 10, and keep good electrical contact at the Z point.Simultaneously, big moving contact 25 inserts to be decided to be mated connection in the contact 24 greatly, the conductive contact film of deciding contact 24 is greatly closely contacted with big moving contact 25, and keep good electrical contact at Z ' point.
At this moment rotating shaft 13 stops operating, transformer neutral point N successively through high-voltage connection 19-high-voltage connection plate 6-high-voltage arm 8 '-decide the big moving contact 25-of contact 7-contact point Z-grounding sleeve 10-and decide contact 24-baffler 12-ground connection diversion column 3-pedestal 1-ground connection band iron 21 greatly and directly be connected for a short time with earth mat E.If this moment, transformer neutral point had uneven capacitance current I
KE, this electric current I then
KETo flow into the earth through above-mentioned approach, be enclosed within the switch grounded circuit current transformer CT outside the ground connection diversion column 3 this moment
D22 secondary side has corresponding electric current output.Since very little from the resistance value between the N-E, so the pressure drop over the ground of N point is also little, add the effect I of insulating bushing 11
KECan not flow through earthing rod 5, so gap discharge loop current instrument transformer CT
J23 secondary side does not have electric current output.And this moment protect gap J to be in the tube chamber of grounding sleeve 10, and high-field electrode short circuit over the ground no longer cuts any ice.
Between the sleeve end pin 17 and tranverse connecting rod 16 left-hand end cover of deciliter adjusting mechanism; Between tranverse connecting rod 16 right-hand ends cover and the pivoted arm end pin 15; And all be provided with dielectric isolation layer (do not give among the figure and marking) between rotating shaft 13 upper and lower sides and the rotating shaft column jecket 4, and make insulation between whole toggle and the grounding sleeve 10, be in " closing " state so work as transformer neutral point combined electrical apparatus device; The direct ground connection operation of transformer neutral point N, the neutral ground electric current I
KECan not produce shunting from toggle, this dielectric isolation layer has also played the effect that reduces toggle frictional resistance simultaneously.
As shown in Figure 4, this transformer neutral point combined electrical apparatus device is in " closing " state, when obtaining " branch " instruction; Rotating shaft 13 rotations, lead agency moves in the other direction, at first the end of grounding sleeve 10 is decided to pull out the contact 7 from little; The big moving contact of fixing on the grounding sleeve 10 simultaneously 25 continues pulling grounding sleeve 10 then from deciding to pull out the contact 24 greatly, slides to the right; Move to position shown in Figure 3 until grounding sleeve 10 by Fig. 4; Actuating unit stops operating, and this moment, the neutral point isolating switch of this transformer neutral point combined electrical apparatus device was in off-state, and transformer neutral point N is earth-free; Protection gap J comes into operation automatically, and transformer neutral point N is in the operating state under the gap protection.
Because this moment, high-field electrode 8 protruded from the little contact 7 of deciding to the right; The left end of grounding electrode 9 protrudes from the termination of grounding sleeve 10 left; So to be high pressure extreme and the minimum spacing of ground connection between extremely for protection gap J; If this moment, the high voltage of certain amplitude appearred in transformer neutral point N, gap J is with breakdown in protection, the disruptive discharge electric current I
JWill be successively through grounding electrode 9-grounding arm 9 '-earthing rod 5-pedestal 1-ground connection band iron 21-ground network E, thereby flow into the earth.At this moment be placed in the gap discharge loop current instrument transformer CT outside the earthing rod 5
J23 secondary side will have current signal output.Because grounding electrode 9 insulate with grounding sleeve 10, thereby the gap discharge electric current I
JCan not flow into the earth, so switch grounded circuit current transformer CT successively through deciding contact 24-wire guide plate 12-ground connection diversion column 3 to ground network E greatly
D22 secondary side does not have electric current output.While I
JCan not produce shunting through the crank linkage.
High-field electrode 8 and said high-voltage arm 8 ' for being threaded, said grounding electrode 9 and said grounding arm 9 ' for being threaded.Through rotation high-field electrode 8 or grounding electrode 9, can regulate the distance of two electrodes 8, the protection gap J between 9, thus the discharge voltage value of setting up protection gap J.And high-field electrode 8 can remove from this device with grounding electrode 9, and this device promptly can be used as the transformer neutral point isolating switch use of a platform independent like this.
Insulation support column 2 can be porcelain knob, also can be metal oxide arrester MOA.When insulation support column 2 was porcelain knob, this device was the combination of neutral point isolating switch with protection gap J; When insulation support column 2 was metal oxide arrester MOA, this device was neutral point isolating switch, protection gap J and MOA three's combination.The difference of these two kinds of combinations only is that the device of being selected for use at left side insulation support column 2 is different, no matter but which kind of combination all only need with a support porcelain part---the outer insulator of porcelain knob or MOA.Therefore this apparatus structure is compact, longitudinal size is less, only needs during on-the-spot the installation that pedestal 1 is fixed in mounting column 20 upper ends and get final product, installs very conveniently, is particularly suitable at the indoor substation of limited space system or is arranged in underground transformer station's use.
This device is in the process of " opening ", " closing " state exchange; Grounding sleeve 10 is when moving around, and it is constant that baffler reaches the fixed-site of deciding contact greatly, and can be provided with mechanism's protective cover 27 this moment; To decide contact 24, baffler 12 and a deciliter adjusting mechanism greatly through this mechanism's protective cover 27 covers; Mechanism's protective cover 27 can be protected these parts, to reduce in the atmosphere pollutant to the erosion of these parts, in like manner can be provided with one and decide contact protective cover 26 for a short time; For a short time, decide contact protective cover 26 and decide contact 7 and cover, decide contact 7 and corrode little to prevent in the atmosphere pollutant with little.When this device was closed as the neutral point isolating switch, the contact resistance in its loop can be more stable like this, and this device operation is also more reliable.
More than this transformer neutral point combined electrical apparatus device that the embodiment of the invention provided has been carried out detailed introduction; For one of ordinary skill in the art; According to the thought of the embodiment of the invention, on embodiment and range of application, all can change to some extent, so this description only is used in the embodiment of the invention is described; Should not be construed as limitation of the present invention, all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (9)
1. transformer neutral point combined electrical apparatus device; Comprise a pedestal (1); Said pedestal (1) is provided with insulation support column (2), an earthing rod (5) and a ground connection diversion column (3); Said insulation support column (2) is connected with a high-field electrode (8) through a high-voltage arm (8 '), and said high-voltage arm (8 ') is provided with one and decides contact (7) for a short time, and said earthing rod (5) passes through a grounding arm (9 ') and is connected with a grounding electrode (9); Said grounding electrode (9) and said high-field electrode (8) are positioned on the same horizontal linear and are positioned opposite to each other; Said grounding arm (9 ') is gone up socket one grounding sleeve (10), and said grounding sleeve (10) is slidingly connected with said grounding arm (9 ') insulation, and deciliter adjusting mechanism that said grounding sleeve (10) and can make this ground connection pipe box move around is connected; It is characterized in that: said ground connection diversion column (3) is decided contact (24) greatly through a baffler (12) and and is connected; Saidly greatly decide contact (24) and be fixed on the said ground connection diversion column (3) through baffler (12), said grounding sleeve (10) is provided with a big moving contact (25), and the end of said grounding sleeve (10) is passed and saidly decided contact (24) and saidly decide contact (7) and be connected for a short time greatly; Said big moving contact (25) is greatly decided contact (24) and is connected with said; It also comprises a mechanism's protective cover and a small contact protective cover, saidly decides greatly contact, baffler reaches a deciliter adjusting mechanism and is positioned at said mechanism protective cover, saidly decides contact and is positioned at the said little contact protective cover of deciding for a short time.
2. transformer neutral point combined electrical apparatus device according to claim 1 is characterized in that: be provided with insulating bushing (11) between said grounding arm (9 ') and the said grounding sleeve (10), make and realize the electricity isolation between grounding arm (9 ') and the grounding sleeve (10).
3. transformer neutral point combined electrical apparatus device according to claim 1 is characterized in that: said insulation support column (2) is porcelain knob or metal oxide arrester MOA.
4. transformer neutral point combined electrical apparatus device according to claim 1 is characterized in that: said little to decide contact (7), decide contact (24) greatly be Mume flower contact.
5. transformer neutral point combined electrical apparatus device according to claim 1 is characterized in that: said high-field electrode (8) is threaded with said high-voltage arm (8 '), and said grounding electrode (9) is threaded with said grounding arm (9 ').
6. transformer neutral point combined electrical apparatus device according to claim 1; It is characterized in that: said deciliter adjusting mechanism comprises a vertical rotating shaft (13); The upper end of said rotating shaft (13) is fixedly connected with the pivoted arm (14) of a level; One end of pivoted arm (14) is hinged with an end of the tranverse connecting rod (16) of a level through a pivoted arm end pin (15); The other end of said tranverse connecting rod (16) is hinged through a sleeve end pin (17) and said grounding sleeve (10), and the lower end of said rotating shaft (13) is connected with a driving mechanism with a power transmission shaft (18).
7. transformer neutral point combined electrical apparatus device according to claim 6 is characterized in that: be with rotating shaft column jecket (4) in the said rotating shaft (13).
8. transformer neutral point combined electrical apparatus device according to claim 7 is characterized in that: between said pivoted arm (14) and the said tranverse connecting rod (16), between said tranverse connecting rod (16) and the grounding sleeve (10) and all be provided with dielectric isolation layer between rotating shaft (13) upper and lower side and the said rotating shaft column jecket (4).
9. transformer neutral point combined electrical apparatus device according to claim 1 is characterized in that: said earthing rod (5) is provided with a gap discharge loop current instrument transformer (23), and said ground connection diversion column (3) is provided with a switch grounded circuit current transformer (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105848521A CN102074906B (en) | 2010-12-13 | 2010-12-13 | Transformer neutral point combination electric equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105848521A CN102074906B (en) | 2010-12-13 | 2010-12-13 | Transformer neutral point combination electric equipment |
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| CN102074906A CN102074906A (en) | 2011-05-25 |
| CN102074906B true CN102074906B (en) | 2012-11-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106505521A (en) * | 2016-11-28 | 2017-03-15 | 国家电网公司 | A kind of earthing or grounding means of transformer neutral point Integrated Protection System |
| CN112509857B (en) * | 2020-09-25 | 2023-04-07 | 平高集团有限公司 | Combined high-voltage direct-current bypass switch |
| CN113899996B (en) * | 2021-10-08 | 2023-11-14 | 江苏安靠智能输电工程科技股份有限公司 | On-spot high voltage insulation test device |
| CN113777456B (en) * | 2021-10-08 | 2023-07-04 | 江苏安靠智能输电工程科技股份有限公司 | Full-closed gas-insulated high-voltage switch field insulation test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1155034C (en) * | 1996-08-13 | 2004-06-23 | Abb.专利有限公司 | Isolating/earthing switch for metal-encapsulated, gas-insulated high-voltage switchgear |
| CN2731692Y (en) * | 2004-05-24 | 2005-10-05 | 通用电气公司 | Circuit breaker |
| CN201426015Y (en) * | 2009-06-15 | 2010-03-17 | 上海安越电气工程技术有限公司 | Transformer neutral point composite apparatus device |
| CN201584514U (en) * | 2009-12-25 | 2010-09-15 | 江苏省电力公司无锡供电公司 | Special connector for coaxial cable |
| CN201877706U (en) * | 2010-12-13 | 2011-06-22 | 上海安越电气工程技术有限公司 | Transformer neutral point combined electrical apparatus device |
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| CN102074906A (en) | 2011-05-25 |
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