KR100771673B1 - Gas insulated switchgear - Google Patents

Abstract

A gas insulated switchgear is provided to simplify the operation of the switchgear by driving a circuit breaker and a ground switchgear using a single driving unit. An insulation gas is filled in an external case. A ground switchgear and a circuit breaker are installed inside the external case. A first rotating lever(410) is rotatably installed on a fixing shaft inside the external case and driven for a selective conduction of the ground switchgear. A second rotating lever(420) is rotatably installed on the fixing shaft and driven for a selective conduction of the circuit breaker. A rotation shaft is rotated by an external power. A cam unit is shaft-coupled with the rotation shaft and selectively drives one of the first and second rotating levers according to a rotation direction of the rotation shaft.

Description

Gas insulated switchgear

1 is a configuration diagram shown to explain a state at the neutral state of the gas insulated switchgear according to an embodiment of the present invention

2 is a cross-sectional view taken along line II of FIG. 1.

3 to 5 is a block diagram showing a process for inputting the grounding switch of the gas insulated switchgear according to an embodiment of the present invention

6 to 8 is a configuration diagram illustrating a process for inserting the disconnecting device of the gas insulated switchgear according to an embodiment of the present invention.

Explanation of symbols for the main parts of the drawings

100. Enclosure 120. Movable conductor

130. Conductor for bus bar 140. Fixed shaft

150. Rotating shaft 151. Manipulator

210. Fixed contactor for earth breaker 220. First mover

310. Fixed contactor for disconnector 320. Second enabler

410. 1st lever lever 420. 2nd lever lever

411,421. Mounting part 412,422. Lever

413,423. Concave groove 414,424. Home

431,432. Link 500. Cam

510. Cam body 521. First indentation protrusion

522. Second indentation protrusion 523. Roller

531. Upper Cam 532. Lower Cam

The present invention relates to a gas insulated switchgear, and in particular, the breaker and the ground switch can be driven by using a single drive and a power source, and the size of the unit of the three-position disconnector (3PDS; 3 Position DS). The present invention relates to a new type of gas insulated switchgear that minimizes the possibility of foreign substances and maximizes cost reduction and product reliability.

In general, a gas insulated switchgear (GIS) uses an insulating gas (SF6) having excellent insulation performance and extinguishing function in a metal sealed container (tank) as an insulating medium to accommodate conductors and various protective devices, thereby improving reliability. As a facility, various components such as a circuit breaker, a disconnector, and a grounding switch are formed in a complex manner.

Among the gas insulated switchgear, the 3 Position DS (3PDS) for driving the disconnector and the ground breaker is mainly applied to a single driving structure to reduce the manufacturing cost, and according to the method of driving the mover Type driving method, link type driving method and gear type driving method.

Here, the blade type driving method is fixed to a rotating shaft as described in Japanese Patent Application Laid-Open No. Hei 10-334776, Korean Patent Application Laid-Open No. 10-2005-98360 and No. 10-0347363. One blade is configured to be connected to the fixed contactor of the disconnector or to the fixed contactor of the grounding switch while rotating together with the rotary shaft, so that the supply and interruption of the main power supply and the selective grounding of the charging current are made.

In addition, in the link type driving method, as described in European Patent EP1082791, the mover for the disconnector and the mover for the ground breaker are connected to the lever fixed to the rotating shaft, respectively, so that the respective movers move linearly by the rotation of the lever. While being selectively connected to a fixed contactor of a disconnector or a grounding switch.

In addition, the gear-type drive system is configured to selectively connect the mover to the disconnector or the grounding switch by operating the mover having the rack gear in the lateral direction, such that the pinion gear rotating together with the rotating shaft as described in US Pat. will be.

However, each driving scheme for the three-position disconnector of the conventional gas insulated switchgear has caused various problems as described below.

First, in the case of the blade-type driving method, foreign matters generated in the process of connecting the blade to the fixed contactor of the disconnector or the stator of the grounding switch have a problem that the insulation performance is degraded due to the enclosure.

In addition, there is a problem that the size of the overall product is inevitably increased because sufficient space must be secured for the blade to rotate.

Second, in the case of the link-type driving method, since both the movers are moved at once, sufficient space for each mover to move smoothly must be secured inside the conductor to which the movable part is assembled, thereby increasing the size of the conductor. Problems that did not exist are caused. That is, the unnecessary space existing in the conductor was inevitably large.

In addition, since each mover is operated collectively in all situations such as the operation of the disconnector and the operation of the ground breaker, foreign matters are generated largely due to the arc caused when connecting or disconnecting the mover to each fixed contactor due to many operations. There is a problem that there is a problem, because of this, the possibility of lowering the insulation performance is large.

Third, in the case of the gear-type driving method, a large amount of foreign matters is caused by the friction driving between the pinion gear and the rack gear, and thus, there is a problem in that the insulation performance is greatly reduced.

Fourth, each driving method for the above-described conventional gas insulated switchgear has a problem of low operation reliability according to the external environment.

In other words, when the blade or link flows due to the influence of external vibration or self-weight, unwanted motion may occur, but the structure that solves this problem has not been made at all.

The present invention has been made to solve the above-described various problems, the object of the present invention is to minimize the operation of the 3PDS to minimize the generation of foreign substances according to the operation and the resulting degradation of the insulation performance It is to provide a new type of gas insulated switchgear that can be prevented in advance and the overall size of the moving part can be reduced by eliminating unnecessary strokes.

According to the gas insulated switchgear of the present invention for achieving the above object is an enclosure filled with insulating gas; A grounding switch and disconnecting unit installed inside the enclosure; A first pivot lever rotatably installed on a fixed shaft inside the enclosure and operated for selective energization of the ground switch; A second pivoting lever rotatably installed on a fixed shaft inside the enclosure and operated for selective energization of the disconnector; A rotating shaft installed inside the enclosure and rotated by receiving external power; And a cam unit which selectively rotates the first pivot lever or the second pivot lever according to the rotation direction while being rotated together with the rotation shaft while being axially coupled to the rotation shaft.

Here, the grounding switch is installed so as to enable a linear reciprocating movement so that the fixed contactor for the grounding switch is fixed inside the enclosure, and the other end thereof is selectively connected to the fixed contactor for the grounding switch with one end connected to the first pivot lever. The disconnector is a straight contact so that the disconnector is fixed to the disconnector fixed to the inside of the enclosure, and the other end is selectively connected to the fixed contactor for the disconnector with one end connected to the second pivoting lever. And a second mover installed to reciprocate, wherein the fixed contactor for the grounding switch and the fixed contactor for the disconnector are respectively installed at positions symmetrical to each other based on the directions in which the rotational centers of the pivot lever and the cam part are arranged. It is characterized by.

At this time, each of the rotation lever and each of the mover is characterized in that connected to each other by a link.

In addition, the first pivot lever and the second pivot lever is characterized in that it is installed so as to be rotated separately from each other while being sequentially coupled in the axial direction of the fixed shaft.

In addition, each of the pivoting levers is provided with a mounting portion which is installed on the fixed shaft and rotated by the operation of the cam portion, and a lever portion protruding outward from the circumferential surface of the mounting portion, and the portion of the circumferential surface of the mounting portion formed with the lever portion; Is formed at each side of the opposite side is formed in the recessed groove long toward the center of rotation, respectively, when the portion in which the recessed groove is rotated toward any direction with respect to the center of rotation the lever portion relative to the center of rotation It is characterized in that it is configured to rotate in the opposite direction.

In addition, the cam portion is configured to include a cam body axially coupled to the rotary shaft, and a projection projection so as to protrude in the circumferential portions of the upper surface and the bottom surface of the cam body, respectively to selectively indent into the recess groove of the respective rotation lever. It features.

In this case, each of the concave projections are formed at positions perpendicular to each other when viewed relative to the axial center of the cam body, the rollers for rolling motion around the concave projections on the circumferential surface of each of the concave projections is further provided. It is characterized by.

In addition, the upper and lower inner surface of the cam body is further formed with a circular cam with the rotation axis around the axis of the concave indentation only the portion facing the position of the concave projection, among the circumferential surface of each rotation lever Both side portions of the concave groove is characterized in that the mounting groove in which the circumferential surface of the cam is selectively concaved to correspond to the circumferential surface shape of the cam.

Hereinafter, a preferred embodiment of the above-described gas insulated switchgear of the present invention will be described with reference to FIGS. 1 to 8.

First, Figures 1 and 2 attached shows the internal structure of the gas insulated switchgear according to a preferred embodiment of the present invention.

As described above, the gas insulated switchgear according to the embodiment of the present invention includes an enclosure, a ground switch, a disconnecting device, a first rotation lever and a second rotation lever, a rotation shaft, and a cam part.

This will be described in more detail as follows.

First, the enclosure 100 is a portion that forms the exterior of the gas insulated switchgear, and an insulating gas (eg, SF6) is filled therein, and is formed entirely of a metal material.

In addition, four openings 101, 102, 103, and 104 are formed in the enclosure 100 to facilitate assembly and inspection and to secure an insulation distance between the grounds. Each of the openings 101, 102, 103, and 104 is formed of an insulating material spacer 111, 112, 113, and a cover. The state closed by 114 is maintained.

Next, the ground switch includes a fixed contactor 210 for a ground switch, which is fixed inside the enclosure 100, and a first mover 220 selectively connected to the fixed contactor 210 for the ground switch. It is configured by.

In this case, the first mover 220 is a ground breaker mover that is selectively connected to the fixed contactor 210 for the ground breaker in a state capable of linear reciprocating movement inside the enclosure 100, the ground breaker The charges charged in the movable part conductor 120 and the conductors electrically connected together with the fixed contactor 210 may be bypassed to the ground through the enclosure 100.

Next, the disconnecting device includes a fixed contactor 310 for disconnecting unit fixed inside the enclosure 100 and a second mover 320 selectively connected to the fixed contacting unit 310 for disconnecting unit. .

The disconnecting contactor 310 is different from the fixed contactor 210 for the grounding switch based on a direction in which rotation centers of the pivoting levers 410 and 420 and the cam unit 500, which will be described later, of the inside of the enclosure 100 are arranged. It is fixed at a symmetrical position and is installed such that the direction in which the second mover 320 is connected is directed in a direction perpendicular to the moving direction of the first mover 220.

In addition, the second actuator 320 is installed in the fixed contactor 310 for the disconnector in a state in which the linear reciprocating movement is installed in the enclosure 100 in a direction perpendicular to the first actuator 220. As a disconnector mover that is selectively connected, it is a series of configurations such that the movable part conductor 120 and the bus bar conductor 130 are energized with each other with the fixed contactor 310 for the disconnector.

Next, the first pivoting lever 410 and the second pivoting lever 420 may rotate on the fixed shaft 140 provided between the fixed contactor 310 for the disconnecting device and the fixed contactor 210 for the ground breaker. It is installed in order to selectively operate the first actuator 220 of the grounding switch and the second actuator 320 of the disconnector.

Each of the pivot levers 410 and 420 includes mounting parts 411 and 421 installed on the fixed shaft 140 and lever parts 412 and 422 protruding outward from a circumferential surface of the mounting parts 411 and 421. In the portion of the circumferential surface of the circumferential surface of the opposite side of the lever portion (412,422) is formed in the recessed grooves (413, 423) are formed in the long groove toward the center of rotation (site coupled to the fixed shaft), respectively, the recess groove ( When the portion on which the 413 and 423 are formed is rotated in one direction (eg, left direction) with respect to the rotation center, the lever parts 412 and 422 rotate in opposite directions (eg, right direction) with respect to the rotation center. It is configured to be.

In addition, the pivot levers 410 and 420 and the movable members 220 and 320 are configured to interlock with each other by links 431 and 432, and the links 431 and 432 are the movable members 220 and 320 and the pivot levers. Both ends of the lever portions 412 and 422 of the 410 and 420 are rotatably installed, respectively. The structure of the links 431 and 432 is to improve the reliability according to the operation between the rotation levers (410, 420) and each of the movers (210, 220).

In particular, the rotation levers 410 and 420 are axially coupled sequentially along the axial direction of the fixed shaft 140, and are configured to prevent the operation from interfering with each other when operating with each other. That is, the first pivot lever 410 is rotatably installed on the outside of the fixed shaft 140, and the second pivot lever 420 is relatively rotatably installed on the inside of the fixed shaft 140. Will be.

Next, the rotation shaft 150 is an axis configured to rotate by receiving external power, and is installed at a portion adjacent to a position where the respective rotation levers 410 and 420 are installed between the ground switch and disconnector.

At this time, the rotation shaft 150 is configured to rotate by receiving the driving force of the manipulator 151 installed on the outside of the enclosure (100).

Next, the cam unit 500 is a series of configurations to selectively operate the rotation levers 410, 420 in accordance with the rotation direction while being rotated together with the rotation shaft 150.

The cam 500 is protruded to the cam body 510 and the cam body 510 is coupled to the rotary shaft 150, the circumferential side portions of the upper and lower surfaces of the cam body 510, respectively, of the pivot levers 410 and 420. The first concave protrusion 521 and the second concave protrusion 522 may be configured to include a first concave protrusion 521 and a second concave protrusion 522 to selectively rotate the pivot levers 410 and 420.

At this time, each of the concave protrusions (521, 522) is preferably formed at positions perpendicular to each other when viewed based on the axis center of the cam body 510. This is a series of configurations for allowing the rotation of the cam unit 500 to be minimized while allowing the rotation of the pivot levers 410 and 420 to be selectively and accurately performed. That is, the cam unit 500 is to rotate each of the rotation levers (410, 420) by rotating only 90 degrees clockwise or counterclockwise in the neutral position.

In particular, the peripheral surface of each of the concave projections (521, 522) is further provided with a roller 523 for rolling motion around the concave projections (521, 522), the roller 523 is each of the concave projections (521, 522) And a series of configurations for minimizing frictional resistance caused by contact between the recessed grooves 413 and 423 of the pivot levers 410 and 420.

On the other hand, in the embodiment of the present invention, the upper and lower surfaces of the cam body 510 is further formed with a circular cam (531, 532) which is rotated while having the rotation axis 150 around the axis, respectively, the rotation lever ( The mounting grooves 414 and 424 in which the circumferential surfaces of the cams 531 and 532 are selectively recessed are formed at both sides of the recessed grooves 413 and 423 in the circumferential surfaces of the 410 and 420 to correspond to the shape of the circumferential surface of the cams 531 and 532. present. At this time, each of the cams 531 and 532 is formed in a shape in which only the portions of the circumferential surfaces of the cams 531 and 532 opposite to the positions of the respective convex protrusions 521 and 522 are inwardly concave compared to other portions.

The series configuration as described above is to allow the cams 531 and 532 to limit the rotation distance of the pivot levers 410 and 420. For example, when the first pivot lever 410 is completely rotated in one side direction, that is, when the first movable member 220 is operated to be connected to the fixed contactor 210 for a ground breaker, the cam body 510 may be rotated. The circumferential surface of the cam (hereinafter referred to as “top cam”) 531 formed on the upper surface coincides with the seating groove 414 of the first pivoting lever 410 so that the first pivoting lever 410 is no longer rotated. It is not allowed. When the second pivot lever 420 is completely rotated in one side direction, that is, when the second movable member 320 is operated to be connected to the fixed contactor 310 for the disconnector, the bottom surface of the cam body 510 The circumferential surface of the cam (hereinafter referred to as “lower cam”) 532 formed in the same position as the seating groove 424 of the second pivoting lever 420 prevents the second pivoting lever 420 from being rotated any more. It is not allowed. In this case, the inwardly indented portions of the cams 531 and 532 may be formed around the circumferential surfaces of the mounting portions 411 and 421 that may be caused during the insertion of the indentation protrusions 521 and 522 into the indentation grooves 413 and 423 of the pivot levers 410 and 420. It is a series of configurations to prevent interference.

In the following, the operation of each situation for the gas insulated switchgear according to the preferred embodiment of the present invention described above will be described.

First, the attached FIG. 1 shows a neutral state of the gas insulated switchgear.

At this time, the first operator 220 is in a state in which the first contactor 220 is released from the fixed contactor 210 for the ground breaker, and the second operator 320 is released from the fixed contactor 310 for the disconnector.

If the ground switch is to be operated in the above state, while the operation of the manipulator 151 is performed, the rotation shaft 150 is rotated by about 90 ° clockwise in the drawing.

That is, when the rotary shaft 150 is rotated as shown in FIG. 3, the cam unit 500 axially coupled to the rotary shaft 150 is also rotated together with the rotary shaft 150, by the rotation of the cam unit 500. The first recessed protrusion 521 formed on the upper circumferential side of the cam body 510 is also rotated clockwise in the drawing.

In this process, the first recessed protrusion 521 is gradually inserted into the recess groove 413 formed on the circumferential surface of the mounting portion 411 of the first pivoting lever 410 as shown in FIGS. 4 and 5. As a result, the first pivot lever 410 is rotated counterclockwise in the drawing about the fixed shaft 140.

Therefore, the first movable member 220 connected to the lever 412 of the first pivot lever 410 by the link 431 is linearly moved in the left direction in the drawing and inserted into the fixed contactor 210 for the grounding switch. The connection is made.

The cam portion 500 continues to rotate until its first recessed projection 521 reaches a position approximately 90 ° from the initial position, wherein the first recessed projection 521 is the first pivot lever ( At the point where the 410 is rotated 90 ° counterclockwise, the 410 is taken out from the concave groove 413 of the first pivot lever 410, and the circumferential surface of the upper cam 531 constituting the cam part 500. Is in a state seated in the mounting groove 414 formed on the circumferential surface of the mounting portion 411 of the first pivot lever 410.

Accordingly, the first rotation lever 410 is not rotated any more and is not rotated in the opposite direction and remains fixed. That is, while the upper cam 531 serves as a stopper, the first rotation lever 410 is prevented from flowing due to external vibration or other factors.

When the operation of the grounding switch is completed by the above-described series of processes, an electric conduction path is formed from the movable part conductor 120 to the enclosure 100, and the charges charged in the movable part conductor 120 and the bus bar conductor 130 are stored in the enclosure. Discharge to ground through 100.

In addition, since the circumferential surface of the lower cam 532 is continuously positioned in the mounting groove 424 formed on the circumferential surface of the mounting portion 421 of the second pivoting lever 420 while the operation of the disconnector as described above is in progress. The second pivot lever 420 is continuously maintained without being rotated together with the first pivot lever 410.

On the other hand, if you want to operate the disconnector in the neutral state as shown in Figure 1 attached to the rotation axis 150 is rotated by approximately 90 ° counterclockwise while the operation of the manipulator 151 is made.

That is, when the rotary shaft 150 is rotated as shown in FIG. 6, the cam unit 500 axially coupled to the rotary shaft 150 is also rotated together with the rotary shaft 150, by the rotation of the cam unit 500. The second recessed protrusion 522 formed on the bottom circumferential side of the cam body 510 is also rotated counterclockwise in the drawing.

In this process, the second recessed protrusion 522 is gradually inserted into the recessed groove 423 formed on the circumferential surface of the mounting portion 421 of the second pivoting lever 420 as shown in FIGS. 7 and 8. As a result, the second pivot lever 420 is rotated in a clockwise direction about the fixed shaft 140.

Accordingly, the second mover 320 connected to the lever 422 of the second pivot lever 420 by the link 432 is inserted into the fixed contactor 310 for the disconnecting device while being linearly moved downward in the drawing. The connection is made.

The cam portion 500 is continuously rotated until its second recessed projection 522 reaches a position approximately 90 ° from the initial position, wherein the second recessed projection 522 is the second pivot lever At the point where the 420 is rotated 90 ° in the clockwise direction, the circumferential surface of the lower cam 532 constituting the cam part 500 is formed, being formed out of the recess groove 423 of the second pivoting lever 420. Is formed in the mounting groove 424 formed on the circumferential surface of the mounting portion 421 of the second pivoting lever 420. Accordingly, the second pivoting lever 420 is not rotated any more and is not rotated in the opposite direction and remains fixed. That is, the lower cam 532 serves as a stopper to prevent the second pivot lever 420 from flowing due to external vibration or other factors.

When the operation of the disconnector is completed by the above-described series of processes, current flows to the load through the movable part conductor 120, the second mover 320, and the fixed contactor 310 for the disconnector.

In addition, since the circumferential surface of the upper cam 531 is continuously positioned in the seating groove 414 formed in the circumferential surface of the mounting portion 411 of the first pivoting lever 410 during the operation of the disconnector as described above. The first pivot lever 410 is continuously maintained without being rotated together with the second pivot lever 420.

On the other hand, the tip of each mover 220,320 constituting the disconnector and the grounding switch maintains a fixed state at the position coinciding with the tip of the shield at the neutral position, so that unwanted motion does not occur and operation performance is advantageous and unnecessary. Since the sliding is reduced, the possibility of foreign substances can be minimized.

As described above, the gas insulated switchgear according to the present invention has various effects as described below.

First, in the neutral state, the mover of the disconnector is operated only when the disconnector is operated, and the mover of the ground breaker is operated only when the ground switch is operated. Can have the effect.

Second, since the disconnecting device and the grounding switch are driven by the same driving device, the manufacturing cost can be reduced.

Third, since the rotation lever for the closing operation of the disconnecting unit and the rotation lever for the closing operation of the grounding switch are provided separately from each other, the reliability of the operation can be maximized.

In particular, since the space for the operation of the respective rotation lever is minimized, the size of the conductor can be minimized.

Fourth, since each rotation lever is always fixed by the cam until the operation by the cam portion is made, there is an effect that the malfunction of each mover due to the influence of external vibration or self-weight can be prevented.

Fifth, the tip of each mover 220 and 320 constituting the disconnector and the ground breaker is fixed at a position consistent with the tip of the shield at the neutral position, so that unwanted motion does not occur and operation performance is advantageous and unnecessary. Since the sliding is reduced, the possibility of foreign matter generation can be minimized.

Claims (9)

An enclosure filled with insulating gas; A grounding switch and disconnecting unit installed inside the enclosure; A first pivot lever rotatably installed on a fixed shaft inside the enclosure and operated for selective energization of the ground switch; A second pivoting lever rotatably installed on a fixed shaft inside the enclosure and operated for selective energization of the disconnector; A rotating shaft installed inside the enclosure and rotated by receiving external power; And, Gas insulated switchgear, characterized in that it comprises a cam portion that is rotated with the rotary shaft in the state coupled to the rotary shaft and selectively operating the first pivot lever or the second pivot lever in accordance with the rotation direction . The method of claim 1, The ground switch is a fixed contactor for the grounding switch is fixed to the inside of the enclosure, the first end is connected to the first rotation lever, the other end is installed so as to be linear reciprocating movement so as to be selectively connected to the fixed contactor for the grounding switch It consists of one mobile worker, The disconnector is a fixed contactor for the disconnector is fixed to the inside of the enclosure, and the second mover is installed to be capable of linear reciprocating movement so that the other end is selectively connected to the fixed contactor for the disconnector with one end connected to the second pivoting lever. Including, And the fixed contactor for the grounding switch and the fixed contactor for the disconnector are respectively installed at positions symmetrical with respect to the direction in which the rotation centers of the pivot levers and the cam units are arranged. The method of claim 2, Gas insulated switchgear, characterized in that between the pivoting lever and each of the movers are connected to each other by a link. The method according to claim 1 or 2, The first rotation lever and the second rotation lever is a gas insulated switchgear, characterized in that it is installed so as to be rotated separately from each other while being sequentially coupled in the axial direction of the fixed shaft. The method according to claim 1 or 2, Each of the pivot levers includes a mounting part which is installed on the fixed shaft and rotated by the operation of the cam part, and a lever part which protrudes outward from a circumferential surface of the mounting part. In the peripheral portion of the mounting portion is formed on the opposite side of the portion formed on the side of the lever portion is formed in each of the recessed grooves long elongated toward the center of rotation, so that the portion of the recessed groove formed toward the direction of the rotation center When the lever unit is rotated, the gas insulated switchgear, characterized in that configured to rotate in the opposite direction relative to the center of rotation. The method of claim 5, The cam portion A cam body axially coupled to the rotating shaft, A gas insulated switchgear, characterized in that it comprises a concave projection to protrude in the circumferential side portions of the upper and lower surfaces of the cam body to selectively infiltrate into the concave groove of the respective rotation lever. The method of claim 6, And each concave protrusion is formed at a position perpendicular to each other when viewed from the axial center of the cam body. The method of claim 6, Gas insulated switchgear, characterized in that the peripheral surface of each of the concave projections further comprises a roller for rolling movement around the concave projections. The method of claim 6, The upper and lower inner surface of the cam body is further formed with a circular cam that is inwardly indented only the portion having the rotation axis around the axis and the position opposite to the position of the indentation projections, Gas insulating opening and closing device, characterized in that the seating groove in which the circumferential surface of the cam is selectively recessed in the circumferential surface of each of the pivoting lever to correspond to the shape of the circumferential surface of the cam.

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