CN203205258U - Arc extinguishing conversion selector with potential resistor connected in series with vacuum tube - Google Patents
Arc extinguishing conversion selector with potential resistor connected in series with vacuum tube Download PDFInfo
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- CN203205258U CN203205258U CN 201320195747 CN201320195747U CN203205258U CN 203205258 U CN203205258 U CN 203205258U CN 201320195747 CN201320195747 CN 201320195747 CN 201320195747 U CN201320195747 U CN 201320195747U CN 203205258 U CN203205258 U CN 203205258U
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- vacuum tube
- voltage
- moving contact
- arc extinguishing
- change over
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Abstract
The utility model discloses an arc extinguishing conversion selector with a potential resistor connected in series with a vacuum tube, comprising a change-over switch which performs switching between a main winding and a voltage-regulating winding, a moving contact for performing polarity selection to the voltage-regulating winding, and a potential resistor of which one end is connected to a middle part of the voltage-regulating winding. The arc extinguishing conversion selector is characterized by also comprising a vacuum tube, wherein the vacuum tube is connected in series between the potential resistor and a leading-out end of the change-over switch; the vacuum tube is closed before the moving contact is separated from a + end or a - end of a static contact, and the vacuum tube is open after the moving contact is electrically connected with the + end or the - end of the static contact. According to the arc extinguishing conversion selector of the utility model, the vacuum tube undertakes a half of induction voltage of the voltage-regulating winding of the transformer when the contacts are separated and connected, and the undertaken voltage is much lower than a recovery voltage of the whole voltage-regulating winding, thus there is no need to put forward a very high requirement for a voltage withstanding capability of the vacuum tube, and a conventional vacuum tube can be used. According to the arc extinguishing conversion selector of the utility model, an arc only generates in the vacuum tube, no arc generates outside the vacuum tube, thus pollution to transformer oil where the switch locates can not occur.
Description
Technical field:
The utility model includes the on-load shunting switch technical field, particularly a kind of change over selector of current potential resistance serial connection vacuum tube arc extinguishing.
Background technology:
On load tap changer is to have at transformer to carry under the situation about namely not having a power failure, and by changing the tapping that connects transformer, changes the turn ratio of transformer primary and secondary winding, thereby reaches the purpose that changes the transformer output voltage.
Existing combined loaded tap-changer is divided into two parts, i.e. diverter switch and selector two parts.Some transformer requires the scope of pressure regulation bigger, progression is more, can increase by a change over selector in selector portion, polarity by conversion transformer pressure regulation winding or change connection thick, the fine tuning winding reaches the purpose that does not increase transformer pressure regulation tapping number and enlarge the transformer range of regulation.
Change over selector passes through the polarity of conversion transformer pressure regulation winding or changes connection thick, the fine tuning winding, and namely thickness is turned and changed selector and polarity change over selector.This operation can only be carried out in the centre position of whole range of regulation, and as Fig. 1, namely the moving contact of coarse adjustment change over selector and polarity change over selector carries out thickness mediation polarity conversion adjusting in the position of K.
Polarity change over selector shown in Fig. 1 a, Fig. 1 b and Fig. 1 c, the operation of polarity change over selector are on tap " centre position ", and namely tap selector is on " K " position and carries out.During the polarity conversion, moving contact 1 leaves the moment of "+" or "-", and the pressure regulation winding 2 of transformer breaks away from main winding 3, and pressure regulation winding 2 is in " suspension " state of current potential.
The operation of the coarse adjustment change over selector shown in Fig. 2 a, Fig. 2 b and Fig. 2 c is on tap " centre position ", and namely tap selector is on " K " position and carries out.During conversion, moving contact 10 leaves the moment of "+" or "-", and the pressure regulation winding 20 of transformer breaks away from main winding 10, and pressure regulation winding 20 is in " suspension " state of current potential.
Owing to there is voltage to exist on the winding adjacent with the pressure regulation winding, and pressure regulation winding and adjacent winding, and adjacent earth electrode between the coupling capacitance that exists, a new current potential that is different from before coarse adjustment change over selector or the action of polarity change over selector appears on the pressure regulation winding in instantaneous the making of throwing off, and the moving contact of coarse adjustment change over selector or polarity change over selector still is on the original current potential, and the potential difference between these two is called as displacement voltage (also have be called offset voltage).This voltage acts on the fracture between the fixed contact of the moving contact of coarse adjustment change over selector or polarity change over selector and "+" or "-" simultaneously, then is known as recovery voltage.When the numerical value of recovery voltage surpass the ability that change over selector can bear (〉=35Kv) time, discharge may appear on the above-mentioned fracture of change over selector.
The intensity of capacitance current and recovery voltage depends on electric capacity and the ratio between system voltage, coil arrangement and the coil.For given coil arrangement and coil capacity, have no idea to reduce capacitance current.
In order to limit recovery voltage, prior art adopts following several schemes usually:
1. between pressure regulation winding 2 middle parts and diverter switch K exit, install and fix the current potential resistance R
P(referring to Fig. 3).This method is simple in structure, but the current potential resistance R
PThrough-flow for a long time, waste electric power also plays the effect of heating to transformer oil, is unfavorable for the operation of transformer.
2. referring to Fig. 4 a, Fig. 4 b and Fig. 4 c, the level switch M of current potential resistance R serial connection one and moving contact 1 interlock, only level switch M just connects the current potential resistance R when conversion operations, this method makes change over selector structure more complicated, in superhigh pressure and ultra high voltage circuit, the recovery voltage at switch M place still might produce arc phenomenon.
Patent ZL201220224564.X-" vacuum extinction change over selector " is a technical scheme that solves above-mentioned prior art deficiency, referring to Fig. 5, the vacuum tube 4 of this scheme is in parallel with moving contact 1, moving contact 1 leaves the moment of "+" or "-", is born the full recovery voltage of pressure regulation winding 2 by vacuum tube 4.But often surpass 35Kv owing to need bear the full recovery voltage of pressure regulation winding 2, this proposes very high requirement just for vacuum 4 pipes, and conventional vacuum tube withstand voltage properties has not reached requirement, the form that needs specific customization or take to connect.
The utility model content:
Technical problem to be solved in the utility model is to provide at the existing in prior technology deficiency a kind of change over selector of current potential resistance serial connection vacuum tube arc extinguishing.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
The change over selector of current potential resistance serial connection vacuum tube arc extinguishing, be included in the diverter switch of switching between main winding and the pressure regulation winding, and the moving contact that the pressure regulation winding is carried out the polarity selection, and one end be connected the current potential resistance at pressure regulation winding middle part, it is characterized in that, also comprise a vacuum tube, described vacuum tube is serially connected between current potential resistance and the diverter switch exit; Described vacuum tube close at described moving contact and fixed contact+or-before head separates, cut-off described moving contact and fixed contact+or-after being electrically connected.
The utility model is at the moving contact of change over selector+or-the position time, vacuum tube is in the off-state that contact separates, current potential resistance does not have electric current, consumed power can not produce heat certainly yet.
The moving contact of change over selector and fixed contact+or-before being about to separate, the vacuum tube that is connected in series with current potential resistance is under the control action of cam, contact in the vacuum tube is connected, the moving contact of change over selector and fixed contact+or-the pressure regulation winding can not be in the electric potential floating state when separating, the moving contact that makes change over selector and fixed contact+or-can not produce recovery voltage when separating, just can not produce electric arc yet; In like manner, the moving contact of change over selector and fixed contact+or-can not produce recovery voltage when connecting yet, can not produce electric arc.The moving contact of change over selector and fixed contact+or-after connecting, the vacuum tube that be connected in series with current potential resistance under the control action of cam, the contact disconnection in the vacuum tube.
The separation of vacuum tube contact of the present utility model will be born half induced voltage of transformer pressure regulation winding with closed, and the recovery voltage of whole relatively pressure regulation winding is much lower, does not just need the requirement too high to the withstand voltage proposition of vacuum tube.
From above-mentioned transfer process as can be seen, electric arc of the present utility model only occurs in the vacuum tube, and the outer no electric arc of pipe takes place, and also just can the transformer oil at switch place not polluted.
Because the utility model has adopted technique scheme, compared with prior art, have following remarkable advantage: the requirement of withstand voltage to vacuum tube is not high, available conventional vacuum tube.
Description of drawings:
Fig. 1 a among Fig. 1, Fig. 1 b and Fig. 1 c are the linear polarity change over selector circuit diagram of transferring.
Fig. 2 a among Fig. 2, Fig. 2 b and Fig. 2 c are that thickness is turned and changed the selector circuit schematic diagram.
Fig. 3 is the change over selector circuit diagram of band fixed potential resistance.
Fig. 4 a among Fig. 4, Fig. 4 b and Fig. 4 c are the change over selector circuit diagram of current potential resistance serial connection one with the moving contact linked switch.
Fig. 5 is the circuit diagram of patent ZL201220224564.X vacuum circuit interrupter change over selector.
Fig. 6 is the electric principle schematic of the change over selector of the utility model current potential resistance serial connection vacuum tube arc extinguishing.
Embodiment
Following embodiment further describes the utility model, but described embodiment only is used for explanation the utility model rather than restriction the utility model.
Referring to Fig. 6, provided the electrical schematic diagram of the change over selector of current potential resistance serial connection vacuum tube arc extinguishing among the figure, as can be seen from the figure, it is included in the diverter switch K that switches between main winding 100 and the pressure regulation winding 200, and the moving contact 300 that pressure regulation winding 200 is carried out the polarity selection, and one end be connected the current potential resistance R p at pressure regulation winding 200 middle parts, it also comprises a vacuum tube 400, vacuum tube 400 is serially connected between current potential resistance R p and the diverter switch K exit; Vacuum tube 400 close at moving contact 300 and fixed contact+or-before head separates, cut-off moving contact 300 and fixed contact+or-after being electrically connected.
Moving contact 300 at change over selector is in+or-the position time, vacuum tube 400 is in the off-state that contact separates, current potential resistance R p does not have electric current, consumed power can not produce heat certainly yet.
The moving contact 300 of change over selector and fixed contact+or-before being about to separate, under the vacuum tube 400 control action of cam that are connected in series with current potential resistance R p, contact in the vacuum tube 400 is connected, the moving contact 300 of change over selector and fixed contact+or-when separating, pressure regulation winding 200 can not be in the electric potential floating state, the moving contact 300 that makes change over selector and fixed contact+or-can not produce recovery voltage when separating, just can not produce electric arc yet; In like manner, moving contact 300 and the fixed contact of change over selector+or-can not produce recovery voltage when connecting yet, can not produce electric arc.The moving contact 300 of change over selector and fixed contact+or-after connecting, the vacuum tube 400 that be connected in series with current potential resistance R p under the control action of cam, the contacts disconnection in the vacuum tube 400.
Above content shows and has described basic principle of the present utility model, principal character and advantage of the present utility model.The personnel of the industry should understand; the utility model is not subjected to the restriction of above-mentioned example; that describes in above-mentioned example and the explanation just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all will fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. current potential resistance is connected in series the change over selector of vacuum tube arc extinguishing, be included in the diverter switch of switching between main winding and the pressure regulation winding, and the moving contact that the pressure regulation winding is carried out the polarity selection, and one end be connected the current potential resistance at pressure regulation winding middle part, it is characterized in that, also comprise a vacuum tube, described vacuum tube is serially connected between current potential resistance and the diverter switch exit; Described vacuum tube close at described moving contact and fixed contact+or-before head separates, cut-off described moving contact and fixed contact+or-after being electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320195747 CN203205258U (en) | 2013-04-17 | 2013-04-17 | Arc extinguishing conversion selector with potential resistor connected in series with vacuum tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320195747 CN203205258U (en) | 2013-04-17 | 2013-04-17 | Arc extinguishing conversion selector with potential resistor connected in series with vacuum tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203205258U true CN203205258U (en) | 2013-09-18 |
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ID=49149341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320195747 Expired - Lifetime CN203205258U (en) | 2013-04-17 | 2013-04-17 | Arc extinguishing conversion selector with potential resistor connected in series with vacuum tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203205258U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016034439A1 (en) * | 2014-09-04 | 2016-03-10 | Maschinenfabrik Reinhausen Gmbh | Switching arrangement for a control transformer, in particular polarity switching means |
-
2013
- 2013-04-17 CN CN 201320195747 patent/CN203205258U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016034439A1 (en) * | 2014-09-04 | 2016-03-10 | Maschinenfabrik Reinhausen Gmbh | Switching arrangement for a control transformer, in particular polarity switching means |
| RU2699820C2 (en) * | 2014-09-04 | 2019-09-11 | Машиненфабрик Райнхаузен Гмбх | Switching device for control transformer, in particular polarity switch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI HUAMING HIGH-VOLTAGE SWITCHGEAR CO., LTD. Effective date: 20140716 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140716 Address after: 200333 Shanghai city Putuo District No. 977 in the same way Patentee after: SHANGHAI HUAMING POWER EQUIPMENT Co.,Ltd. Patentee after: SHANGHAI HUAMING HIGH-VOLTAGE SWITCHGEAR Co.,Ltd. Address before: 200333 Shanghai city Putuo District No. 977 in the same way Patentee before: SHANGHAI HUAMING POWER EQUIPMENT Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |