CN204794072U - Arc suppressing coil series connection switching formula self preservation protects damping device - Google Patents
Arc suppressing coil series connection switching formula self preservation protects damping device Download PDFInfo
- Publication number
- CN204794072U CN204794072U CN201520437721.9U CN201520437721U CN204794072U CN 204794072 U CN204794072 U CN 204794072U CN 201520437721 U CN201520437721 U CN 201520437721U CN 204794072 U CN204794072 U CN 204794072U
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- main contacts
- contact lever
- type contactor
- arc suppression
- transformer
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Abstract
The utility model relates to an arc suppressing coil series connection switching formula self preservation protects damping device. Its purpose is in order to provide the arc suppressing coil damping device that the operation is reliable, the degree of safety is high. The utility model discloses a transformer, two contactors and damping resistance, power transmission system is gone into to side joint in the transformer, and the neutral point of transformer is connected through the one end that first wire and arc suppressing coil once inclined, and the other end series connection that the arc suppressing coil once inclined has current transformer and damping resistance, and closed type contactor and open type contactor connect in parallel respectively at the damping resistance both ends. Be provided with a voltage transformer on the first wire, a voltage transformer and current transformer's signal output part is connected with the signal input part of switching box respectively. The arc suppressing coil secondary side is provided with the 2nd voltage transformer, and the 2nd voltage transformer's the signal output part and the signal input part of switching box are connected, and the control end of switching box is connected with the power end of closed type contactor and open type contactor respectively.
Description
Technical field
The utility model relates to electric field, particularly relates to a kind of arc suppression coil series connection open and close type self-shield damping device.
Background technology
The effect of arc suppression coil is when neutral point resonance grounding net generation single phase ground fault, provides inductance current compensation of ground point capacitance current, earth point residual flow is diminished, thus electric arc is extinguished naturally.It seems from raising extinguishing arc effect, the absolute value of tuning-off degree is the smaller the better, is preferably in full compensating coefficient, namely be tuned on resonance point, but when electrical network normally runs, be tuned to the full arc suppression coil compensated and can produce dangerous series resonance over-voltage, this is unallowed.In order to solve this contradiction, turn-adjusting arc-extinguishing winding is direct series damping resistor usually, thus increase electrical network ratio of damping, when electrical network is normally run, series resonance over-voltage is less than 15% of specified phase voltage value, so just arc suppression coil can be tuned to close to full compensating coefficient when electrical network normally runs, after there is single-phase earthing, by damping resistance short circuit or excision, thus realize the optimal compensation.Current turn-adjusting arc-extinguishing winding is usually at primary side series damping resistor, and primary side occurs that any circuit question is all easy to cause burning of series damping resistor.Therefore, main contacts open type contactor carries out short circuit to damping resistance and becomes the method relatively commonly used, and main contacts open type contactor is only under the state of normal work, after receiving control signal, contact just can close, short circuit could be carried out to damping resistance, if main contacts open type contactor breaks down, send control signal in time and also cannot carry out short circuit to damping resistance.Once system earth and damping resistance cannot short circuits, so within the short time (5 to 10 minutes), just can burn out damping case, thus cut off the grounded circuit of arc suppression coil, produce arc overvoltage, all can cause damage to whole system, consequence is very serious.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of reliable, arc suppression coil that compact conformation, degree of safety are high series connection open and close type self-shield damping device.
The utility model arc suppression coil series connection open and close type self-shield damping device, comprise transformer, arc suppression coil, main contacts closed type contactor, main contacts open type contactor and damping resistance, transformer primary side access transmission system, the neutral point of transformer is connected with one end of arc suppression coil primary side by the first wire, the other end of arc suppression coil primary side is connected with zero potential point by privates, privates is in series with current transformer and damping resistance successively, damping resistance two ends are parallel with main contacts closed type contactor and main contacts open type contactor respectively, first wire is provided with the first voltage transformer, the signal output part of the first voltage transformer is connected with the signal input part of switching box, the signal output part of current transformer is connected with the signal input part of switching box, arc suppression coil secondary side is provided with the second voltage transformer, the signal output part of the second voltage transformer is connected with the signal input part of switching box, and the control end of switching box is connected with the power end of main contacts closed type contactor and main contacts open type contactor respectively.
The utility model arc suppression coil series connection open and close type self-shield damping device, wherein said main contacts closed type contactor comprises the first contact lever, second contact lever, first copper bar, second copper bar, transmission crank arm, first electromagnet core, second magnet and ceramic package, transmission crank arm comprises again horizontal conveyor arm and vertical transmission arm, first contact lever and the second contact lever are vertically arranged at Ceramic shell internal, first contact lever is connected with one end of the first copper bar and the second copper bar respectively with on the second contact lever, the other end of the first copper bar and the second copper bar is connected with the wire between secondary coil and damping resistance respectively, the contact head of the first contact lever bottom contacts at Ceramic shell internal with the contact head on the second contact lever top, the top of the first contact lever is stretched out from ceramic package top and is fixedly connected with ceramic package, the bottom of the second contact lever is stretched out from ceramic package bottom and is connected with the touch spring top vertically arranged, touch spring bottom is connected with insulating part top, the left side edge of insulating part and horizontal conveyor arm is hinged, on the left of vertical transmission arm, outer wall is fixed with the second magnet, the position relative with the second magnet is fixed with the first electromagnet core, the outer felt of the first electromagnet core is wound with solenoid.
The utility model arc suppression coil series connection open and close type self-shield damping device; wherein said Ceramic shell internal vacuum; be tightly connected between first contact lever and the top of ceramic package; second contact lever of Ceramic shell internal is arranged with bellows; bellows bottom is connected with ceramic package bottom inner wall sealing; Ceramic shell internal is also provided with radome, and the contact head of the first contact lever and the contact head of the second contact lever are all positioned at radome inside.
The utility model arc suppression coil series connection open and close type self-shield damping device; wherein said main contacts closed type contactor also comprises insulation board; insulation board is vertically arranged on position relative with vertical transmission arm on the left of vertical transmission arm; be provided with switching-in spring in the horizontal direction between insulation board and vertical transmission arm, the first electromagnet core is fixed on the medium position of insulation board outer right wall.
The utility model arc suppression coil series connection open and close type self-shield damping device; wherein said first wire is also provided with single-phase isolating switch; the second wire is also drawn between single-phase isolating switch and arc suppression coil; the other end of the second wire is connected with zero potential point, and the second wire is provided with overvoltage protection device.
The utility model arc suppression coil series connection open and close type self-shield damping device difference from prior art is: the utility model is by the primary winding of damping resistance series connection access arc suppression coil, and at damping resistance two ends parallel connection access main contacts closed type contactor and main contacts open type contactor, main contacts closed type contactor and the short circuit of main contacts open type contactor to damping resistance is adopted to ensure, when transmission system normally works, the contact of main contacts closed type contactor and main contacts open type contactor all disconnects, in damping resistance place in circuit; When transmission system generation single phase ground fault, the contact of main contacts closed type contactor and main contacts open type contactor is all closed, carries out short circuit to damping resistance, ensure that the reliability of plant running.While transmission system generation single phase ground fault, even if also break down in contactor loop, main contacts closed type contactor and main contacts open type contactor are all in power failure state, the contact of main contacts closed type contactor is also be in closure state, also short circuit can be carried out to damping resistance, provide a kind of completely new approach of short circuit damping resistance, further avoid the appearance of arc overvoltage phenomenon.By the second voltage transformer or the first voltage transformer summation current transformer two kinds of different modes, main contacts closed type contactor and main contacts open type contactor are controlled in addition, short circuit is carried out to damping resistance, ensure that the reliability of plant running.
Below in conjunction with accompanying drawing, the utility model arc suppression coil series connection open and close type self-shield damping device is described further.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the utility model arc suppression coil series connection open and close type self-shield damping device;
Fig. 2 is the front sectional view of main contacts closed type contactor in the utility model arc suppression coil series connection open and close type self-shield damping device.
Embodiment
As shown in Figure 1; the circuit structure diagram of the utility model arc suppression coil series connection open and close type self-shield damping device, comprises transformer 19, arc suppression coil LF, Current Transmit, the first voltage transformer pt 1, second voltage transformer pt 2, main contacts closed type contactor 22, main contacts open type contactor 23 and damping resistance R.Transformer 19 primary side access transmission system; the neutral point N of transformer 19 is connected with one end of arc suppression coil LF primary side by the first wire; first wire is provided with single-phase isolating switch G; the second wire is drawn between single-phase isolating switch G and the neutral point N of transformer 19; the other end of the second wire is connected with zero potential point GND, and the second wire is provided with overvoltage protection device MOA.The other end of arc suppression coil LF primary side is connected with zero potential point GND by privates, privates is in series with Current Transmit and damping resistance R successively, is parallel with main contacts closed type contactor 22 and main contacts open type contactor 23 at damping resistance R two ends respectively.The signal output part being provided with the first voltage transformer pt 1, first voltage transformer pt 1 between single-phase isolating switch G and the neutral point N of transformer 19 is connected with the signal input part of switching box KH; The signal output part of Current Transmit is connected with the signal input part of switching box KH, arc suppression coil LF secondary side is provided with the second voltage transformer pt 2, the signal output part of the second voltage transformer pt 2 is connected with the signal input part of switching box KH, the control end of switching box KH is connected with the power end of main contacts closed type contactor 22 and main contacts open type contactor 23 respectively, is controlled the charged situation of the solenoid of main contacts closed type contactor 22 and main contacts open type contactor 23 by switching box KH.
As shown in Figure 2; for the front sectional view of main contacts closed type contactor in the utility model arc suppression coil series connection open and close type self-shield damping device, comprise transmission crank arm, insulation board 12, first electromagnet core 16, second magnet 17, solenoid 15, ceramic package 6, first copper bar 1 and the second copper bar 2.Ceramic package 6 inner vacuum, the top being vertically provided with the first contact lever 4 and the second contact lever 5, first contact lever 4 in the inside of ceramic package 6 respectively reaches above ceramic package 6, and the first contact lever 4 is fixedly connected with between the top of ceramic package 6.The contact head on the second contact lever 5 top is positioned at ceramic package 6 inside and contacts with the contact head of the first contact lever 5 bottom, and the bottom of the second contact lever 5 reaches below ceramic package 6.Radome 7 is covered with above the contact point of inner two contact heads of ceramic package 6, the contact point of two contact heads is positioned at radome 7 inside, second contact lever 5 of ceramic package 6 inside is arranged with bellows 8, and bellows 8 bottom is connected with ceramic package 6 bottom inner wall sealing.Above ceramic package 6, be provided with the first copper bar 1, the first contact lever 4 be positioned at above ceramic package 6 is connected with the left side of the first copper bar, the right side access external circuit of the first copper bar.Be fixedly connected with connecting plate 11 being positioned on the second contact lever 5 below ceramic package 6, the right side of connecting plate 11 is provided with the second copper bar 2, and the right sidewall of connecting plate 11 is connected with the left side of the second copper bar, the right side access external circuit of the second copper bar.Insulating part 12 is provided with below the second contact lever 5, second contact lever 5 bottom be vertically provided with touch spring 10 top and be connected, touch spring 10 bottom is connected with insulating part 12 top, the transmission crank arm that cross section is L shape is provided with on the right side of insulating part 12, transmission crank arm comprises again horizontal conveyor arm 13 and vertical transmission arm 14, left side edge and the insulating part 12 of horizontal conveyor arm 13 are hinged, the right side edge of horizontal conveyor arm 13 is connected with the bottom of vertical transmission arm 14, horizontal conveyor arm 13 and the tie point place of vertical transmission arm 14 are provided with rotating shaft 18, transmission crank arm can be rotated along rotating shaft 18.Position relative with vertical transmission arm 14 on the left of vertical transmission arm 14 is vertically provided with insulation board 3, be provided with switching-in spring 9 in the horizontal direction between insulation board 3 top and vertical transmission arm 14 top, the two ends, left and right of switching-in spring 9 are connected with outer wall on the left of vertical transmission arm 14 and insulation board 3 outer right wall respectively.The first electromagnet core 16 is fixed with at the medium position of insulation board 3 outer right wall, the outer felt of the first electromagnet core 16 is wound with solenoid 15, on the left of the vertical transmission arm 14 relative with the first electromagnet core 16 position, outer wall is fixed with the second magnet 17, after solenoid 15 is energized, the first electromagnet core 16 can adsorb the second magnet 17.
The operation principle of main contacts closed type contactor 22 is: the first copper bar 1 and the second copper bar 2 are distinguished in place in circuit, when work is carried out in the load in circuit, solenoid 15 is not energized, not adhesive between first electromagnet core 16 and the second magnet 17, transmission crank arm does not rotate, and automatically closes between the contact of the first contact lever 4 and the contact of the second contact lever 5; When the load in circuit does not need to carry out work, be energized to solenoid 15, magnetic force is produced between first electromagnet core 16 and the second magnet 17, adhesive is there is between first electromagnet core 16 and the second magnet 17, second magnet 17 drives transmission crank arm with rotating shaft 18 for the point of rotation rotates, thus the horizontal conveyor arm 13 in transmission crank arm drives insulating part 12 to move downward, insulating part 12 drives the second contact lever 5 to move downward by touch spring 10, make the separated of the contact of the contact of the first contact lever 4 and the second contact lever 5, load power down stops carrying out work.
Main contacts open type contactor 23 described in the utility model is existing equipment.
The course of work of the utility model arc suppression coil series connection open and close type self-shield damping device is: single-phase isolating switch G closes, and arc suppression coil drops in transmission system and carries out work.When transmission system normally works, damping resistance R connects and accesses the primary side of arc suppression coil, and the solenoid being controlled main contacts closed type contactor 22 by switching box KH is charged, and contact disconnects; The solenoid dead electricity of main contacts open type contactor 23, contact disconnects.When transmission system generation single phase ground fault, can adopt and adopt magnitude of voltage in Acquisition Circuit and current value in two ways: first kind of way is gathered the magnitude of voltage on bus and current value by the first voltage transformer pt 1 summation current transformer CT, the magnitude of voltage collected and current value are transferred to switching box KH, switching box KH controls to control main contacts closed type contactor 22 and main contacts open type contactor 23 according to the magnitude of voltage preset and current value, make the solenoid dead electricity of main contacts closed type contactor 22, contact closure; The solenoid of main contacts open type contactor 23 is charged, and contact closure now completes the short circuit to damping resistance R, and the ratio of damping of transmission system reduces, thus makes arc suppression coil realize full compensation.The second way is by being gathered by the magnitude of voltage of the second voltage transformer pt 2 pairs of arc suppression coil secondary sides, the magnitude of voltage collected is transferred to switching box KH, switching box KH controls main contacts closed type contactor 22 and main contacts open type contactor 23 according to the magnitude of voltage of arc suppression coil secondary side, make the solenoid dead electricity of main contacts closed type contactor 22, contact closure; The solenoid of main contacts open type contactor 23 is charged, and contact closure now completes the short circuit to damping resistance R, and the ratio of damping of transmission system reduces, thus makes arc suppression coil realize full compensation.While transmission system generation single phase ground fault, even if also break down in contactor loop, main contacts closed type contactor 22 and main contacts open type contactor 23 are all in power failure state, the contact of main contacts closed type contactor 22 is also be in closure state, also can carry out short circuit to damping resistance R, avoid occurring arc overvoltage.The operating voltage of main contacts closed type contactor 22 and main contacts open type contactor 23 can be provided by secondary coil N2.
The utility model arc suppression coil series connection open and close type self-shield damping device, damping resistance R is connected and accesses the primary winding N1 of arc suppression coil, and at damping resistance R two ends parallel connection access main contacts closed type contactor 22 and main contacts open type contactor 23, the short circuit of main contacts closed type contactor 22 and main contacts open type contactor 23 couples of damping resistance R is adopted to ensure, when transmission system normally works, the contact of main contacts closed type contactor 22 and main contacts open type contactor 23 all disconnects, in damping resistance R place in circuit; When transmission system generation single phase ground fault, the contact of main contacts closed type contactor 22 and main contacts open type contactor 23 is all closed, carries out short circuit to damping resistance R, ensure that the reliability of plant running.While transmission system generation single phase ground fault, even if also break down in contactor loop, main contacts closed type contactor 22 and main contacts open type contactor 23 are all in power failure state, the contact of main contacts closed type contactor 22 is also be in closure state, also short circuit can be carried out to damping resistance R, provide the completely new approach of a kind of short circuit damping resistance R, further avoid the appearance of arc overvoltage phenomenon.By the second voltage transformer pt 2 or the first voltage transformer pt 1 summation current transformer CT two kinds of different modes, main contacts closed type contactor 22 and main contacts open type contactor 23 are controlled in addition, short circuit is carried out to damping resistance R, ensure that the reliability of plant running.The utility model is reliable, compact conformation, degree of safety are high, compared with prior art has obvious advantage.
Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection range that the utility model claims determine.
Claims (5)
1. an arc suppression coil series connection open and close type self-shield damping device, it is characterized in that: comprise transformer (19), arc suppression coil (LF), main contacts closed type contactor (22), main contacts open type contactor (23) and damping resistance (R), transformer (19) primary side access transmission system, the neutral point (N) of transformer (19) is connected by the first wire one end with arc suppression coil (LF) primary side, the other end of arc suppression coil (LF) primary side is connected with zero potential point (GND) by privates, privates is in series with current transformer (CT) and damping resistance (R) successively, damping resistance (R) two ends are parallel with main contacts closed type contactor (22) and main contacts open type contactor (23) respectively, first wire is provided with the first voltage transformer (PT1), the signal output part of the first voltage transformer (PT1) is connected with the signal input part of switching box (KH), the signal output part of current transformer (CT) is connected with the signal input part of switching box (KH), arc suppression coil (LF) secondary side is provided with the second voltage transformer (PT2), the signal output part of the second voltage transformer (PT2) is connected with the signal input part of switching box (KH), and the control end of switching box (KH) is connected with the power end of main contacts closed type contactor (22) and main contacts open type contactor (23) respectively.
2. arc suppression coil series connection open and close type self-shield damping device according to claim 1, it is characterized in that: described main contacts closed type contactor (22) comprises the first contact lever (4), second contact lever (5), first copper bar (1), second copper bar (2), transmission crank arm, first electromagnet core (16), second magnet (17) and ceramic package (6), transmission crank arm comprises again horizontal conveyor arm (13) and vertical transmission arm (14), first contact lever (4) and the second contact lever (5) are vertically arranged in ceramic package (6) inside, first contact lever (4) is connected with one end of the first copper bar (1) and the second copper bar (2) respectively with on the second contact lever (5), the other end of the first copper bar (1) and the second copper bar (2) is connected with the wire between secondary coil N2 and damping resistance R respectively, the contact head of the first contact lever (4) bottom and the contact head on the second contact lever (5) top are at ceramic package (6) interior contact, the top of the first contact lever (4) is stretched out from ceramic package (6) top and is fixedly connected with ceramic package (6), the bottom of the second contact lever (5) is stretched out from ceramic package (6) bottom and is connected with the touch spring vertically arranged (10) top, touch spring (10) bottom is connected with insulating part (12) top, insulating part (12) is hinged with the left side edge of horizontal conveyor arm (13), vertical transmission arm (14) left side outer wall is fixed with the second magnet (17), the position relative with the second magnet (17) is fixed with the first electromagnet core (16), the outer felt of the first electromagnet core (16) is wound with solenoid (15).
3. arc suppression coil series connection open and close type self-shield damping device according to claim 2, it is characterized in that: described ceramic package (6) inner vacuum, be tightly connected between the top of the first contact lever (4) and ceramic package (6), the second contact lever (5) that ceramic package (6) is inner is arranged with bellows (8), bellows (8) bottom is connected with ceramic package (6) bottom inner wall sealing, ceramic package (6) inside is also provided with radome (7), it is inner that the contact head of the first contact lever (4) and the contact head of the second contact lever (5) are all positioned at radome (7).
4. arc suppression coil series connection open and close type self-shield damping device according to claim 2; it is characterized in that: described main contacts closed type contactor (22) also comprises insulation board (3); insulation board (3) is vertically arranged on the position relative with vertical transmission arm (14), vertical transmission arm (14) left side; be provided with switching-in spring (9) between insulation board (3) and vertical transmission arm (14) in the horizontal direction, the first electromagnet core (16) is fixed on the medium position of insulation board (3) outer right wall.
5. arc suppression coil series connection open and close type self-shield damping device according to claim 1; it is characterized in that: described first wire is also provided with single-phase isolating switch (G); the second wire is also drawn between single-phase isolating switch (G) and arc suppression coil; the other end of the second wire is connected with zero potential point (GND), and the second wire is provided with overvoltage protection device (MOA).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520437721.9U CN204794072U (en) | 2015-06-24 | 2015-06-24 | Arc suppressing coil series connection switching formula self preservation protects damping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520437721.9U CN204794072U (en) | 2015-06-24 | 2015-06-24 | Arc suppressing coil series connection switching formula self preservation protects damping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794072U true CN204794072U (en) | 2015-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520437721.9U Expired - Fee Related CN204794072U (en) | 2015-06-24 | 2015-06-24 | Arc suppressing coil series connection switching formula self preservation protects damping device |
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| CN (1) | CN204794072U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109936125A (en) * | 2019-04-01 | 2019-06-25 | 广州市雷斯盾电气科技发展有限公司 | A kind of arc suppression coil device with disconnecting structure |
| CN113097970A (en) * | 2021-05-24 | 2021-07-09 | 广东科瑞德电气科技有限公司 | Novel distribution safety power consumption device |
-
2015
- 2015-06-24 CN CN201520437721.9U patent/CN204794072U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109936125A (en) * | 2019-04-01 | 2019-06-25 | 广州市雷斯盾电气科技发展有限公司 | A kind of arc suppression coil device with disconnecting structure |
| CN113097970A (en) * | 2021-05-24 | 2021-07-09 | 广东科瑞德电气科技有限公司 | Novel distribution safety power consumption device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20180624 |