Solid-insulated switchgear equipped with a circuit breaker position indicator

Abstract

The solid-insulated switchgear equipped with a position indicator according to the present invention displays the current position and inlet / outlet status of the circuit breaker on the outside of the enclosure through an operation display panel and a front display unit that operate mechanically in conjunction with the positional movement of the circuit breaker, thereby allowing an operator to check the position and operating status of the circuit breaker without opening the enclosure door. Furthermore, when the circuit breaker is in the test position, the connection to the release lever and push rod is kinematically cut off even if the operating solenoid is activated, so that the release lever and push rod do not operate even if power is connected to the operating solenoid due to a failure of the detection switch, etc., thereby providing an effect of eliminating risk factors for safety accidents such as electric shock even under unexpected situations.

Description

Technology Field

[0001] The present invention relates to a solid-insulated switchgear equipped with an indicator for indicating the position of a circuit breaker, and more specifically, to a solid-insulated switchgear equipped with an indicator for indicating the position of a circuit breaker that is installed inside an enclosure and mechanically displays the position on the outside of the enclosure when the solid-insulated circuit breaker reaches a predetermined position among a connected position, a test position, and a moving position, thereby allowing the current position of the circuit breaker to be easily checked without opening the door. Background Technology

[0002] In power plants, substations, or buildings equipped with electrical facilities, switchboards are installed to protect electrical components such as generators, transformers, and loads when power is sent to or received from multiple locations, and circuit breakers, switches, or disconnectors (hereinafter referred to as "circuit breakers") are installed in the switchboards to open or close the electrical circuits.

[0003] A solid-insulated switchgear is a device in which a vacuum circuit breaker and a circuit connection busbar are built inside a solid-insulated housing. Furthermore, among solid-insulated switchgear, there is an inlet and outlet type solid-insulated switchgear in which a circuit breaker with a second solid-insulated housing is slidably installed relative to an enclosure with a first solid-insulated housing.

[0004] These solid-insulated switchgear compactly incorporate components such as circuit breakers (CB), disconnecting switches (DS), and earthing switches (ES) in a package type. Unlike metal-clad switchgear (MCSG), there are no exposed conductive parts, so electric shock accidents caused by contact do not occur. Furthermore, it eliminates the need for periodic maintenance and inspection due to the use of SF6 gas in conventional GIS, and can protect power distribution by enabling rapid fault isolation and minimizing power outage time.

[0005] In particular, the circuit breaker (CB) can be mechanically opened using a manual handle or manual lever, and is designed to be mounted on a bogie and pulled forward from within the enclosure to facilitate testing, maintenance, and inspection.

[0006] This technology is disclosed in Korean Registered Patent Publication No. 10-1768868 (published on August 10, 2017), which describes an inlet / outlet type solid-insulated switchgear, comprising an enclosure having a first solid-insulated housing connected to the power source side, and a bogie equipped with a second solid-insulated housing that slides within the enclosure to be inserted and withdrawn and is connected to the load side.

[0007] Therefore, although a worker can push the bogie to bring the contact of the second solid insulation housing into contact with the contact of the first solid insulation housing, and pull the bogie to separate the contact of the second solid insulation housing from the contact of the first solid insulation housing, this configuration has a problem in that it is difficult to determine the position of the bogie, that is, the open and closed state of the circuit breaker, when the door is not opened, so there is a high risk of safety accidents such as electric shock if the door is opened while the circuit breaker is in the closed state.

[0008] To solve these problems, Korean Registered Patent Publication No. 10-2594090 (published on October 26, 2023) discloses an 'indicator for indicating the position of a circuit breaker in a solid-insulated switchgear'.

[0009] The door (10) of the ‘indicator for indicating the position of a circuit breaker of a solid-insulated switchgear’ disclosed in the above-mentioned registration publication is intended to open and close the front of the enclosure (C), and has a vertical slot (11) formed on the inside to guide the operation indicator plate so that it can be exposed to the front of the door or inserted into the inside of the enclosure (C).

[0010] In addition, the frame forming the enclosure (C) is manufactured by bending rolled steel plate, galvanized steel plate, stainless steel plate, aluminum plate, etc., thereby strengthening structural rigidity to maintain a robust assembly state and stable posture, and reducing the displacement response ratio during vibration and reducing the acceleration applied to the internal electrical equipment.

[0011] The interior of the outer casing (C) is formed of a cage-shaped frame assembled three-dimensionally by connecting multiple frames together by bolting. The carriage (20) is installed to slide back and forth along a guide rail (22) within the outer casing (C) by the rotation of a lead screw (21), while being equipped with a circuit breaker (CB) for switching load current and blocking fault current. When a worker manually rotates the lead screw (21), which is installed from the carriage (20) to the door (10), using an operating tool (handle), the sliding screw (ball nut) fitted into the lead screw (21) moves in a straight line without vibration, thereby allowing the wheels attached to the front and rear sides of the carriage (20) to slide back and forth along the guide rail (22).

[0012] In addition, the circuit breaker (CB) may adopt a structure in which, as the movable rod descends, the movable contact connected to the lower end comes into contact with the fixed contact inside the vacuum interrupter, thereby forming a closed state, and as the movable rod rises, the movable contact separates from the fixed contact inside the vacuum interrupter, thereby forming an open state.

[0013] In addition, although the current position of the circuit breaker—i.e., the connection / extraction status—can be easily checked without opening the door by mechanically marking on the exterior of the enclosure when the breaker of the solid-insulated switchgear reaches a predetermined position among the service position (connected position), test position, and moving position, there is a problem in that the release lever releases the action of pushing the push rod and presses the electrical contact of the detection switch to transmit an electrical signal to the controller, and the controller is configured to cause the solenoid plunger to pull the link; since this structure makes it difficult to operate in the event of a failure of the detection switch or solenoid, there is a high risk of safety accidents, such as electric shock, if the door is opened while the breaker is in the closed state. Prior art literature

[0014] Korean Registered Patent Publication No. 10-1768868 Korean Registered Patent Publication No. 10-2594090 The problem to be solved

[0015] The present invention aims to solve the aforementioned problems by providing a solid-insulated switchgear equipped with a circuit breaker position indicator that enhances safety, wherein in the connected position and moving position, the release lever and the driving part of the operating solenoid are connected to transmit power from the operating solenoid to the release lever and the push rod, and in the test position, even if the operating solenoid is operated, the connection to the release lever and the push rod is kinematically disconnected.

[0016] In addition, the installed position indicator is equipped with a warning sign during movement, allowing the operator to visually confirm the service position (connected position) and test position, thereby improving safety. This relates to a solid-insulated switchgear equipped with a circuit breaker position indicator. means of solving the problem

[0017] A solid-insulated switchgear equipped with a position indicator according to the present invention has the following features.

[0018] In an indicator for positioning a circuit breaker installed for opening and closing a circuit of a power distribution panel, the circuit breaker position indicator (100) comprises: a door (10) that opens and closes the front of an enclosure (C) and has a vertical slot (11) formed inside; a carriage (20) that is capable of sliding back and forth along a guide rail (22) within the enclosure (C) by the rotation of a lead screw (21) and is equipped with a solid-insulated circuit breaker (CB) for opening and closing a circuit; a release lever (23) fixed to one side of the carriage (20); a bracket (110) fixed to the inside of the door (10) and having a load guide (111) formed on its upper part; an operation display plate (130) in which the bracket (110) and the lower part are connected by an axial joint via a rotation axis (120) and are exposed forward through the slot (11) when rotated around the rotation axis (120); and the A solenoid actuator (200) is provided, which is mounted on the lower end of one side (112) of the bracket (110) and rotates the operation indicator plate (130) around the rotation axis (120).

[0019] It is composed of a detection switch (24) installed within the enclosure (C) facing the release lever (23) and detecting the position of the release lever (23) to transmit an electrical signal to a controller (25), a controller (25) that controls the operation of the solenoid actuator (200) according to the opening / closing signal of the detection switch (24), a load bar (400) that slides forward according to the guidance of the load guide (111) by the pushing action of the release lever (23) to rotate the rotation axis (120) and protrude the operation display plate (130) forward of the door (10), and an elastic spring (410) mounted between the load guide (111) and the load bar (400) and having an elastic force that causes the load bar (400) to return to its original position when the pushing action of the release lever (23) is released.

[0020] A driving unit (300) is provided to convert the linear mechanical motion of the plunger (210) of the solenoid actuator (200) into the rotational motion of the rotation axis (120).

[0021] The above driving unit (300) is provided with a transmission link (220) that transmits the linear mechanical motion of the plunger (210) of the solenoid actuator (200), and a crank pin (310) that transmits the linear motion of the transmission link (220) to the rotational motion of the rotational shaft (120) on one side (121) of the rotational shaft.

[0022] In addition, the transmission link (220) and crank pin (310) are characterized by having a power cutoff part (260) that is mechanically cut off in the test position.

[0023] Additionally, the power cutoff section (260) is connected to the plunger (210) of the solenoid actuator (200), and one side (230) of the transmission link (220) is connected to the link pin (240), and the other side (240) is formed as a stopper (250) capable of tensioning the crank pin (310). A guide hole (280) in the shape of an elongated hole is provided in the center of the transmission link (220) so that the stopper (250) can be spaced apart from the crank pin (310) so that power is not transmitted in the test position section, and a guide rod (290) is provided to guide the guide hole (280) and is fixed to one side (112) of the bracket (110).

[0024] The lower side (281) of the guide hole (280) is formed closer to the outer casing (C) than the upper side (282).

[0025] In addition, the guide hole (280) is formed from the upper side (282) to the lower side (281) of the guide hole (280) in a straight line from 0 to 45 degrees in section (b), and the shape from section (b) to section (a) has an inward inclination angle so that the lower side (281) is formed closer to the outer casing (C) side than the upper side (282), so that when the guide rod (290) is positioned on the lower side (281), the stopper (250) is formed to be separated from the crank pin (310) so that power is not transmitted.

[0026] In addition, a moving warning sign (131) formed of a reflector is further provided on the inner side of the operation display board (130).

[0027] The carriage (20) moves by the rotation of the lead screw (21), and the release lever (23) pushes the load bar (400) to press the pressure rotation pin (420), thereby rotating the rotation shaft (120) fixed to the pressure rotation pin (420) to protrude the operation indicator plate (130) forward of the door (10).

[0028] An elastic spring (410) is provided between the load bar (400) and the load guide (111) so that the release lever (23) can be pressed when the above circuit breaker moves from the test position to the connected position.

[0029] The above pressure rotating pin (420) is configured so that it does not come into contact with the load bar (400) in the service position (connected position) and can be operated only by the solenoid actuator (200).

[0030] Additionally, the bracket (110) is provided with a return mold (500) so that the rotation axis (120) can be positioned in a moving position, and the return mold (500) is provided with a return spring so that the rotation axis (120) can be positioned in a moving position and pressurizes the rotation axis to move from a connected position or a test position to a moving position. Effects of the invention

[0031] In the solid-insulated switchgear equipped with a position indicator according to the present invention, when the circuit breaker is in the test position, the connection between the release lever and the push rod is kinematically cut off even when the operating solenoid is operated, so that the release lever and the push rod do not operate even if power is connected to the operating solenoid due to a failure of the detection switch, etc., thereby preventing risk factors for safety accidents such as electric shock even under unexpected situations.

[0032] In addition, at the test position, a visually verifiable moving warning sign is provided on the side of the release lever, allowing the insertion / extraction status to be easily checked and thereby eliminating risk factors for safety accidents. Brief explanation of the drawing

[0033] FIG. 1 is a schematic perspective view of a device equipped with an indicator for indicating the position of a circuit breaker in a solid-insulated switchgear according to the present invention. FIG. 2 is a perspective view showing a part of a device equipped with an indicator for indicating the position of a circuit breaker of a solid-insulated switchgear according to the present invention. FIG. 3 is a perspective view showing an indicator for indicating the position of a circuit breaker in a solid-insulated switchgear according to the present invention. FIG. 4 is a diagram to help understand the operating state of the circuit breaker position indicator of a solid-insulated switchgear according to the present invention from the service position (connected position) to the test position of the circuit breaker. FIG. 5 is a diagram to help understand the operating state of the circuit breaker position indicator of the solid-insulated switchgear according to the present invention from the test position to the connected position of the circuit breaker. Specific details for implementing the invention

[0034] Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings.

[0035] Prior to this, it is specified that the terms described below are defined in consideration of their functions in the present invention, and that they should be interpreted in accordance with the concept consistent with the technical spirit of the present invention and the meaning commonly accepted or recognized in the relevant technical field.

[0036] In addition, descriptions of known configurations and conventionally known matters related to the present invention are omitted or simplified to clarify the gist of the present invention.

[0037] It is stated that the attached drawings may be partially exaggerated or simplified for the purpose of explaining the configuration, operation, and operating principles of the technology, as well as for ease of understanding and clarity of the technology, and that each component in the drawings does not exactly correspond to the actual size and shape.

[0038] Furthermore, terms such as top, bottom, upper surface, lower surface, or upper, lower, upper side, lower side, front and back, left and right, etc., used in this invention are used for convenience to distinguish the relative positions of each component. For example, the upper part of a drawing may be named or referred to as the upper part and the lower part as the lower part, and the length direction may be named or referred to as the front-back direction and the width direction as the left-right direction.

[0040] In addition, terms such as "first," "second," etc. used in the present invention may be used to describe various components. That is, terms such as "first," "second," etc. may be used solely for the purpose of distinguishing one component from another.

[0041] The main elements constituting the circuit breaker position indicator of a solid-insulated switchgear according to an embodiment of the present invention are provided with an enclosure (C), a door (10), a carriage (20), a release lever (23), a bracket (110), a rotating shaft (120), an operation display board (130), a controller (25), and a detection switch (24), as shown in FIGS. 2 to 5.

[0042] The above operation display plate (130) is moved to a connected position and includes a driving unit (300) equipped with a solenoid actuator (200), a plunger (210), and a transmission link (220), and the operation display plate (130) moved to the connected position is moved by the rotation of the lead screw (21) and the carriage (20) is moved, and the release lever (23) pushes the load bar (400) to press the pressure rotating pin (420), thereby rotating the rotation shaft (120) fixed to the pressure rotating pin (420) and protruding the door (10) forward, and includes a protrusion pressing unit (600).

[0043] If I explain the main components and operation method in detail

[0044] As illustrated in FIGS. 1 and 2, the present invention relates to an indicator for indicating the position of a circuit breaker equipped in a device for opening and closing a circuit of a switchboard.

[0045] The door (10) of the solid-insulated switchgear is intended to open and close the front of the enclosure (C), and a vertical slot (11) is formed on the inside, and the slot (11) serves to guide the operation indicator (130) so that it can be exposed to the front of the door (10) or inserted into the inside of the enclosure (C).

[0046] The interior of the enclosure (C) is formed of a cage-shaped frame assembled three-dimensionally by connecting multiple frames together by bolting, and the carriage (20) is installed to slide back and forth along the guide rail (22) within the enclosure (C) by the rotation of the lead screw (21), while being equipped with a circuit breaker (CB) for switching load current and blocking fault current.

[0047] Additionally, the release lever (23) is identical to the conventional technology in that it opens and closes the electrical contact of the detection switch (24) or pushes the load bar (400) according to the movement of the carriage (20).

[0048] As shown in FIGS. 2 to 5, the circuit breaker position indicator of the present invention is fixed to the inside of the door (10) and is provided with a bracket (110) having a rod guide (111) on its upper side, and is provided with an operation display plate (130) fixed to a rotation axis (120) on the lower side of the bracket (110) and exposed or concealed forward through the slot (11) when the rotation axis (120) rotates around the rotation axis (120).

[0049] The process of the above solid-insulated switchgear being cut off involves a carriage (20) that slides forward along a guide rail (22) within the enclosure (C) by the rotation of a lead screw (21), and as the carriage (20) moves, a release lever (23) switches a detection switch (24) and pushes a load bar (400).

[0050] As the above load bar (400) moves forward, it presses and moves the pressure rotating pin (420) fixed to the rotation axis (120), and as the pressure rotating pin (420) moves, the rotation axis (120) rotates, and the operation display plate (130) is exposed forward through the slot (11) and moves to the test position.

[0051] Between the above-mentioned load guide (111) and the load bar (400), an elastic spring (410) is provided, which exerts an elastic force to return the load bar (400) to its original position when the pushing action of the release lever (23) is released.

[0052] The above elastic spring (410) has a compressive force due to the pushing action of the release lever (23).

[0053] Additionally, when the operation display board (130) moves from the test position to the connected position, it is operated by rotating the rotation shaft (120) with the operating force of the solenoid actuator (200), and is equipped with a drive unit (300) that converts the linear mechanical motion of the plunger (210) of the solenoid actuator (200) into the rotational motion of the rotation shaft (120).

[0054] The above drive unit (300) is a mechanism that converts linear motion into rotational motion and consists of a link that performs linear motion and a crank that converts the linear motion transmitted from the link into rotational motion.

[0055] The above driving unit (300) is provided with a transmission link (220) that transmits the linear mechanical motion of the plunger (210) of the solenoid actuator (200), and a crank pin (310) that converts and transmits the linear motion of the transmission link (220) into the rotational motion of the rotational shaft (120) on one side (121) of the rotational shaft, so that the linear mechanical motion of the plunger (210) is transmitted into rotational motion by the transmission link (220) and the crank pin (310).

[0056] In addition, the transmission link (220) and crank pin (310) further include a power cutoff part (260) that is mechanically cut off in the test position.

[0057] As shown in FIG. 5, the power cutoff section (260) is connected to the plunger (210) of the solenoid actuator (200), and one side (230) of the transmission link (220) is connected to the link pin (240), and the other side (240) is provided with a locking projection (250) capable of tensioning the crank pin (310).

[0058] Additionally, an elongated guide hole (280) is formed in the center of the transmission link (220), and a guide rod (290) is provided in the path along which the transmission link (220) moves, which is fixed to one side (112) of the bracket (110) and inserted into the guide hole (280) to guide the path of the transmission link (220).

[0059] One side (230) of the above transmission link (220) is connected to the plunger (210) and link pin (240) of the solenoid actuator (200) to allow linear motion to proceed, and the position of the locking projection (250) capable of tensioning the crank pin (310) on the other side (240) is changed according to the shape of the guide hole (280), so that the crank pin (310) and the locking projection (250) can be connected or separated and mechanically blocked depending on the position of the crank pin (310) provided on the rotation axis and the position of the locking projection (250).

[0060] If the lower side [281; the side connected by the plunger (210) and the link pin (240)] of the guide hole (280) is formed closer to the outer casing (C) side than the upper side (282), the locking projection (250) on the other side (240) is formed to be farther from the rotation axis when the transmission link (220) moves upward, so that in the test position, it is spaced apart from the crank pin (310) provided on the rotation axis, and thus power is not transmitted even when the transmission link (220) moves downward.

[0061] The guide hole (280) is formed from the upper side (282) to the lower side (281) of the guide hole (280) in a straight line from 0 to 45 degrees in section (b), and the shape from section (b) to section (a) has an inward inclination angle so that the lower side (281) is formed closer to the outer casing (C) than the upper side (282), so that when the guide rod (290) is positioned on the lower side (281), the stopper (250) is formed to be separated from the crank pin (310) so that power is not transmitted.

[0062] In addition, in the test position, the crank pin (310) provided on the rotation axis is moved upward from the horizontal line and positioned at an angle of 90 degrees or less, so that the distance between the stopper (250) and the crank pin (310) becomes larger.

[0063] In this way, when the operation indicator (130) is deployed to the test position, the solenoid actuator (200) cannot rotate the rotation shaft (120) even if it operates incorrectly electrically, thereby improving stability.

[0064] On the inner side of the above operation display board (130), a moving warning sign (131) formed of a reflector is further provided.

[0065] Various types of light-emitting materials, such as reflectors and fluorescent materials, are installed on the inner surface of the above operation display board (130) so that the position of the operation display board can be confirmed by the unfolded shape of the operation display board (130) and the reflectors.

[0066] Additionally, the carriage (20) moves by the rotation of the lead screw (21), and the release lever (23) pushes the load bar (400) to press the pressure rotation pin (420), thereby rotating the rotation shaft (120) fixed to the pressure rotation pin (420) to protrude the operation indicator plate (130) forward of the door (10).

[0067] An elastic spring (410) is provided between the load bar (400) and the load guide (111) so that the release lever (23) can be pressed when the above circuit breaker moves from the test position to the connected position.

[0068] The above pressure rotating pin (420) is configured so that it does not come into contact with the load bar (400) in the service position (connected position) and can be operated only by the solenoid actuator (200).

[0069] Even if the load bar (400) moves toward the pressure rotating pin (420) due to kinematic abnormality, the load bar (400) and the pressure rotating pin (420) do not come into contact when the solenoid actuator (200) has rotated the rotation axis (120) to the connected position, thereby improving stability.

[0070] In addition, the bracket (110) is provided with a return mold (500) so that the rotation axis (120) can be positioned at a moving position (45-degree position), and

[0071] The above return mold (500) is equipped with a return spring so that the rotation axis (120) can be positioned in a moving position, and the rotation axis (120) is pressed and moved to move from a connected position or test position to a moving position.

[0072] The above solenoid actuator (200) can move to a connected position or a test position only when the rotation axis (120) is open to move to a moving position.

[0073] In the test position, when the circuit breaker (CB) moves to the connected position by the rotation of the lead screw (21), the load bar (400) moves forward, and when the rotation axis (120) moves to the moving position by the return mold (500), the crank pin (310) provided on the rotation axis moves from the upper side of the horizontal line to a position of 90 degrees or less, and the crank pin (310) is caught on the catch (250), and at the same time, the load bar (400) moves to the connected position by the solenoid actuator (200) and the carriage (20) moves by pushing the release lever (23) by the elastic spring (410).

[0075] The present invention is not limited to the specific preferred embodiments described above, and any person skilled in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0076] 10 : Door 11 : Slot 20: Carriage 21: Lead screw 22: Guide rail 23: Release lever 24: Detection switch 100 : Indicator for circuit breaker position 110 : Bracket 111 : Load guide 120 : Rotation axis 130 : Operation indicator 200: Solenoid actuator 210: Plunger 220 : Forwarding link 230 : One side of the forwarding link 240 : Link pin 250 : Locking tab 260 : Power disconnection unit 300 : Drive unit 310 : Crank pin 400 : Road bar 410 : Elastic spring 500 : Return mold C : Enclosure CB: Solid-insulated circuit breaker

Claims

Claim 1 In an indicator for indicating the position of a circuit breaker provided in a solid-insulated circuit breaker (CB) for opening and closing a circuit of a power distribution panel, the indicator (100) comprises: a door (10) that opens and closes the front of an enclosure (C) and has a vertical slot (11) formed inside; a carriage (20) that is capable of sliding back and forth along a guide rail (22) within the enclosure (C) by the rotation of a lead screw (21) and is equipped with a solid-insulated circuit breaker (CB) for opening and closing a circuit, a release lever (23) fixed to one side of the carriage (20), a bracket (110) fixed to the inside of the door (10) and having a rod guide (111) formed on its upper part, and the bracket (110) and its lower part are connected by an axial connection via a rotation axis (120), and when rotated around the rotation axis (120), the bracket (110) is exposed forward through the slot (11). An operation indicator (130), a solenoid actuator (200) mounted on the lower end of one side (112) of the bracket (110) and rotating the operation indicator (130) around the rotation axis (120), a detection switch (24) installed in the enclosure (C) facing the release lever (23) and detecting the position of the release lever (23) and transmitting an electrical signal to a controller (25); and a controller (25) controlling the operation of the solenoid actuator (200) according to the opening / closing signal of the detection switch (24).A rod bar (400) that slides forward according to the guidance of the rod guide (111) by the pushing action of the release lever (23) to rotate the rotation axis (120) and protrude the operation indicator plate (130) forward of the door (10), and an elastic spring (410) mounted between the rod guide (111) and the rod bar (400) and having an elastic force applied so that the rod bar (400) returns to its original position when the pushing action of the release lever (23) is released, and a driving unit (300) that converts the linear mechanical motion of the plunger (210) of the solenoid actuator (200) into the rotational motion of the rotation axis (120) is provided, and the driving unit (300) is provided with a transmission link (220) that transmits the linear mechanical motion of the plunger (210) of the solenoid actuator (200) and the on one side (121) of the rotation axis A solid-insulated switchgear equipped with a position indicator, characterized by being provided with a crank pin (310) that transmits the linear motion of a transmission link (220) to the rotational motion of a rotation axis (120), and furthermore, the transmission link (220) and the crank pin (310) are provided with a power cutoff part (260) that is mechanically cut off at a test position. Claim 2 In claim 1, the power cutoff part (260) is connected to the plunger (210) of the solenoid actuator (200), and one side (230) of the transmission link (220) is connected to the link pin (240), and the other side (240) is formed as a stopper (250) capable of tensioning the crank pin (310); the stopper (250) is provided with an elongated guide hole (280) in the center of the transmission link (220) so that it can be spaced apart from the crank pin (310) so that power is not transmitted in the test position section, and a guide rod (290) is provided to guide the guide hole (280) and is fixed to one side (112) of the bracket (110), wherein the lower side (281) of the guide hole (280) is formed closer to the outer casing (C) than the upper side (282). Equipped solid-insulated switchgear. Claim 3 A solid-insulated switchgear equipped with a position indicator, characterized in that, in the first paragraph, a moving warning sign (131) formed of a reflector is further provided on the inner surface of the operation display board (130). Claim 4 A solid-insulated switchgear equipped with a position indicator, characterized in that, in claim 1, the carriage (20) moves by the rotation of the lead screw (21) and the release lever (23) pushes the load bar (400) to press the pressure rotating pin (420), thereby rotating the rotation shaft (120) fixed to the pressure rotating pin (420) to protrude the operation indicator plate (130) forward of the door (10), and an elastic spring (410) is provided between the load bar (400) and the load guide (111) so that the release lever (23) can be pressed when the circuit breaker moves from the test position to the connected position, and the pressure rotating pin (420) does not come into contact with the load bar (400) in the connected position and can be operated only by the solenoid actuator (200).

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