CN102074906A - Transformer neutral point combination electric equipment - Google Patents
Transformer neutral point combination electric equipment Download PDFInfo
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- CN102074906A CN102074906A CN 201010584852 CN201010584852A CN102074906A CN 102074906 A CN102074906 A CN 102074906A CN 201010584852 CN201010584852 CN 201010584852 CN 201010584852 A CN201010584852 A CN 201010584852A CN 102074906 A CN102074906 A CN 102074906A
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 84
- 238000009413 insulation Methods 0.000 claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 14
- 229910052573 porcelain Inorganic materials 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
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- 238000005260 corrosion Methods 0.000 abstract description 2
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- KJDGFQJCHFJTRH-YONAWACDSA-N 16-Ketoestradiol Chemical compound OC1=CC=C2[C@H]3CC[C@](C)([C@H](C(=O)C4)O)[C@@H]4[C@@H]3CCC2=C1 KJDGFQJCHFJTRH-YONAWACDSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 230000003292 diminished effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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 by 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 may produce higher power-frequency overvoltage; and the safety of electric equipment in this electrical network 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 installed in parallel, as shown in Figure 1; Special transformer then is installed in parallel 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 truly a Combination Design, 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 twin props mounting structure, basis and pillar expense height.
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, the insulation support column is provided with a certain contact and a high-field electrode, 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 be provided with a moving contact on the grounding sleeve, the ground connection diversion column is connected with grounding sleeve by 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 move around together with grounding sleeve, therefore flexible conductor is difficult for fixing, also be 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
At above-mentioned the deficiencies in the prior art, the technical problem to be solved in the present invention 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, described pedestal is provided with an insulation support column, one earthing rod and a ground connection diversion column, described insulation support column is connected with a high-field electrode by a high-voltage arm, described high-voltage arm is provided with one and decides contact for a short time, described earthing rod is connected with a grounding electrode by a grounding arm, described grounding electrode and described high-field electrode are positioned on the same horizontal linear and are positioned opposite to each other, socket one grounding sleeve on the described grounding arm, described grounding sleeve and the insulation of described grounding arm are slidingly connected, deciliter adjusting mechanism that described grounding sleeve and can make this ground connection pipe box move around is connected, described ground connection diversion column is decided contact greatly by a baffler and and is connected, described grounding sleeve is provided with a big moving contact, the end of described grounding sleeve is passed and is describedly decided greatly contact and decide contacts mates and be connected for a short time with described, and described big moving contact is decided contacts mates and is connected greatly with described.
Preferably, be provided with insulating bushing between described grounding arm and the described grounding sleeve, make and realize the electricity isolation between grounding arm and the grounding sleeve.
Preferably, described insulation support column is porcelain knob or metal oxide arrester MOA.
It is preferably, described that little to decide contact, decide contact greatly be Mume flower contact.
Preferably, described high-field electrode is threaded with described high-voltage arm, and described grounding arm is threaded with described grounding electrode.
Preferably, described deciliter adjusting mechanism comprises a vertical rotating shaft, fixedly connected with the pivoted arm of a level in the upper end of described rotating shaft, one end of pivoted arm is hinged by an end of the tranverse connecting rod of a pivoted arm end pin and a level, the other end of described tranverse connecting rod is hinged by a sleeve end pin and described grounding sleeve, and the lower end of described rotating shaft is connected with a driving mechanism with a power transmission shaft.
Further, be with the rotating shaft column jecket in the described rotating shaft, described rotating shaft column jecket is connected with described pedestal.
Further again, between described pivoted arm and the described tranverse connecting rod, between described tranverse connecting rod and the grounding sleeve and all be provided with dielectric isolation layer between rotating shaft upper and lower side and the described rotating shaft column jecket.
Preferably, it comprises that also mechanism's protective cover and decides the contact protective cover for a short time, describedly decides contact greatly, baffler reaches a deciliter adjusting mechanism and is positioned at described mechanism protective cover, describedly decides contact and is positioned at the described little contact protective cover of deciding for a short time.
Preferably, described earthing rod is provided with a gap discharge loop current instrument transformer, and described 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 is decided contacts mates when being connected with big, and this device is the neutral point isolating switch of a closure; Move when driving a grounding sleeve by 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; 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 by 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 solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
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 as follows:
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 the gap during gap discharge and flow into putting of earth mat at last
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.
Shown in Fig. 3,4, 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 by 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 by screw, and high-voltage connection plate 6 is fixed on the insulation support column 2 by 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 by pivoted arm end pin 15, the other end of tranverse connecting rod 16 by 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 a supporting role 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 by 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, as shown in Figure 4, the actuating unit of deciliter adjusting mechanism makes rotating shaft 13 drive pivoted arm 14 by power transmission shaft 18 and pivoted arm end pin 15 rotates in the horizontal plane direction after the instruction that obtains " closing ".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, make insulation between whole toggle and the grounding sleeve 10, so when transformer neutral point combined electrical apparatus device is in " closing " state, 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 25 is from deciding to pull out the contact 24 greatly simultaneously; continue pulling grounding sleeve 10 then; slide 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 described high-voltage arm 8 ' for being threaded, described grounding electrode 9 and described grounding arm 9 ' for being threaded.By rotation high-field electrode 8 or grounding electrode 9, the distance that can regulate the protection gap J between two electrodes 8,9, thereby the discharge voltage value of setting up protection gap J.And high-field electrode 8 and grounding electrode 9 can remove from this device, and this device transformer neutral point isolating switch of promptly can be used as a platform independent uses like this.
This device is " opening "; " close " in the process of state exchange; grounding sleeve 10 is when moving around; it is constant that baffler reaches the fixed-site of deciding contact greatly; can be provided with mechanism's protective cover 27 this moment; to decide contact 24 greatly by this mechanism's protective cover 27; a baffler 12 and a deciliter adjusting mechanism cover; 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 is described in detail; for one of ordinary skill in the art; thought according to the embodiment of the invention; all can change to some extent in specific embodiments and applications; therefore 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 (10)
1. transformer neutral point combined electrical apparatus device, comprise a pedestal (1), described pedestal (1) is provided with an insulation support column (2), one earthing rod (5) and a ground connection diversion column (3), described insulation support column (2) is connected with a high-field electrode (8) by a high-voltage arm (8 '), described high-voltage arm (8 ') is provided with one and decides contact (7) for a short time, described earthing rod (5) is connected with a grounding electrode (9) by a grounding arm (9 '), described grounding electrode (9) and described high-field electrode (8) are positioned on the same horizontal linear and are positioned opposite to each other, described grounding arm (9 ') is gone up socket one grounding sleeve (10), described grounding sleeve (10) is slidingly connected with described grounding arm (9 ') insulation, deciliter adjusting mechanism that described grounding sleeve (10) and can make this ground connection pipe box move around is connected, it is characterized in that: described ground connection diversion column (3) is decided contact (24) greatly by a baffler (12) and and is connected, described grounding sleeve (10) is provided with a big moving contact (25), the end of described grounding sleeve (10) is passed and is describedly decided greatly contact (24) and decide contact (7) and be connected for a short time with described, described big moving contact (25) and describedly decide contact (24) and be connected greatly.
2. transformer neutral point combined electrical apparatus device according to claim 1, it is characterized in that: be provided with insulating bushing (11) between described grounding arm (9 ') and the described 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: described 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: described 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: described high-field electrode (8) is threaded with described high-voltage arm (8 '), and described grounding electrode (9) is threaded with described grounding arm (9 ').
6. transformer neutral point combined electrical apparatus device according to claim 1, it is characterized in that: described deciliter adjusting mechanism comprises a vertical rotating shaft (13), fixedly connected with the pivoted arm (14) of a level in the upper end of described rotating shaft (13), one end of pivoted arm (14) is hinged with an end of the tranverse connecting rod (16) of a level by a pivoted arm end pin (15), the other end of described tranverse connecting rod (16) is hinged by a sleeve end pin (17) and described grounding sleeve (10), and the lower end of described 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 described rotating shaft (13).
8. transformer neutral point combined electrical apparatus device according to claim 7 is characterized in that: between described pivoted arm (14) and the described tranverse connecting rod (16), between described 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 described rotating shaft column jecket (4).
9. transformer neutral point combined electrical apparatus device according to claim 1, it is characterized in that: it also comprises a mechanism's protective cover and a small contact protective cover, describedly decide greatly contact, baffler reaches a deciliter adjusting mechanism and is positioned at described mechanism protective cover, describedly decide contact and be positioned at the described little contact protective cover of deciding for a short time.
10. transformer neutral point combined electrical apparatus device according to claim 1, it is characterized in that: described earthing rod (5) is provided with a gap discharge loop current instrument transformer (23), and described 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105848521A CN102074906B (en) | 2010-12-13 | 2010-12-13 | Transformer neutral point combination electric equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102074906A true CN102074906A (en) | 2011-05-25 |
| CN102074906B CN102074906B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105848521A Expired - Fee Related CN102074906B (en) | 2010-12-13 | 2010-12-13 | Transformer neutral point combination electric equipment |
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| Country | Link |
|---|---|
| CN (1) | CN102074906B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505521A (en) * | 2016-11-28 | 2017-03-15 | 国家电网公司 | A grounding device for a transformer neutral point comprehensive protection system |
| CN112509857A (en) * | 2020-09-25 | 2021-03-16 | 平高集团有限公司 | Combined high-voltage direct-current bypass switch |
| CN113777456A (en) * | 2021-10-08 | 2021-12-10 | 江苏安靠智能输电工程科技股份有限公司 | On-spot insulation test device of totally enclosed gas insulation high voltage switch |
| CN113899996A (en) * | 2021-10-08 | 2022-01-07 | 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 |
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| 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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- 2010-12-13 CN CN2010105848521A patent/CN102074906B/en not_active Expired - Fee Related
Patent Citations (5)
| 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 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505521A (en) * | 2016-11-28 | 2017-03-15 | 国家电网公司 | A grounding device for a transformer neutral point comprehensive protection system |
| CN112509857A (en) * | 2020-09-25 | 2021-03-16 | 平高集团有限公司 | Combined high-voltage direct-current bypass switch |
| CN112509857B (en) * | 2020-09-25 | 2023-04-07 | 平高集团有限公司 | Combined high-voltage direct-current bypass switch |
| CN113777456A (en) * | 2021-10-08 | 2021-12-10 | 江苏安靠智能输电工程科技股份有限公司 | On-spot insulation test device of totally enclosed gas insulation high voltage switch |
| CN113899996A (en) * | 2021-10-08 | 2022-01-07 | 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102074906B (en) | 2012-11-28 |
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