Door interlock device for switchboard

Abstract

The present invention relates to a door interlock device for a switchboard and, more specifically, to a door interlock device for a switchboard, which in a situation where opening of a switchboard door is restricted, can selectively release a door interlock function so as to open the door. By the door interlock device for a switchboard, according to the present invention, in a situation where opening of a switchboard door is restricted by the door interlock device, the interlock function of the door interlock device can be selectively released so that the switchboard door can be opened.

Description

Door interlock device of distribution panel

[0001] The present invention relates to a door interlock device for a distribution panel, and more specifically, to a door interlock device for a distribution panel that can release the door interlock function so as to selectively open the door in a situation where opening of the distribution panel door is restricted.

[0002] In general, a distribution panel is a device used to monitor, control, and protect the power system. The distribution panel houses and uses various electrical devices such as circuit breakers and current transformers for the operation or control of power plants and substations, and the operation of motors.

[0003] Here, a circuit breaker is an electrical device installed in a part of a power system to open and close a load or cut off a circuit in the event of an accident such as a grounding or short circuit. Among these circuit breakers, vacuum circuit breakers are mainly used in high-voltage power systems. A vacuum circuit breaker is a type of circuit breaker installed in a high-voltage power system to protect the power system by cutting off the circuit in the event of a dangerous situation such as a short circuit or overcurrent. It is designed to take advantage of its excellent insulation performance and arc extinguishing ability in a vacuum state. In other words, a vacuum circuit breaker is a product that protects people and load equipment by cutting off the circuit in a vacuum extinguishing method at a vacuum interrupter (VI) inside the circuit breaker by a separate external relay when an abnormal current such as an overcurrent, short circuit, or ground fault occurs in an extra-high voltage / high voltage distribution line.

[0004] Inside the distribution panel, the circuit breaker body's bus (power side) and load (load side) terminals are connected to the cradle's bus (power side) and load (load side) terminals, thereby supplying voltage and current. There is also an operating position (Service position, Connected position) where the circuit breaker body's terminals are separated from the cradle's terminals, thereby allowing only inspection of the circuit breaker's operating status.

[0005] When the circuit breaker is in the operating position, it operates when an accident current such as a short circuit or ground fault occurs to prevent secondary accidents. However, when the circuit breaker is in the test position, it does not operate, so a separate grounding switch is installed at the rear of the distribution board to ensure human and material safety and prevent accidents.

[0006] At this time, a safety device is installed to allow the circuit breaker to be inserted or removed while the switchboard door is closed for the operator's safety. In other words, the switchboard is equipped with a door interlock device that prevents the door from being opened when the circuit breaker is in the operating position and allows the door to be opened only when the circuit breaker is in the test position.

[0007] Figure 1 shows the circuit breaker room of the distribution panel, and shows a cradle (or distribution panel case) (11) for the circuit breaker and a door (12).

[0008] Figures 2 to 4 illustrate a cradle (11) and a circuit breaker (13). The circuit breaker (13) is placed in three standardized positions within the cradle (11), namely, a 'Disconnected' position, a 'Test' position, and a 'Connected' position.

[0009] Here, Fig. 2 shows a state in which the circuit breaker (13) is in a disconnected position within the cradle (11), Fig. 3 shows a state in which the circuit breaker (13) is in a test position within the cradle (11), and Fig. 4 shows a state in which the circuit breaker (13) is in a connected position within the cradle (11).

[0010] Figure 2 shows a case where a circuit breaker (13) is placed in a disconnected position within a cradle (11). In the disconnected position, the control wiring is not connected, so the circuit breaker (13) cannot be electrically operated, and the circuit breaker (13) and the main line are not connected, so the current-carrying function through the circuit breaker (13) is not realized.

[0011] Figure 3 shows a case where a circuit breaker (13) is placed in a test position within a cradle (11), and is connected to the control wiring so that the electrical operation of the circuit breaker (13) is possible. However, since the circuit breaker (13) and the main bus are not connected, power from the main bus, which is in a live state, cannot be supplied to the circuit breaker (13). At this time, the opening operation of the door must be restricted for safety reasons.

[0012] Fig. 4 shows a case where a circuit breaker (13) is placed in a connected position within a cradle (11). The connected position is a position where the circuit breaker (13) is fully inserted into the cradle (11), electrical control is possible, and the circuit breaker terminal (15) is connected to the bushing terminal (19) so that power from the main line can be passed to the circuit breaker.

[0013] Figure 5 shows the inside of a circuit breaker room, where components related to the present invention are arranged.

[0014] Since there is a possibility of explosion when the bushing terminal (19) and the circuit breaker (13) are in contact in a live state, for the protection of the user, the insertion / withdrawal operation of the circuit breaker (13) must be performed while the door (12) is closed, and when the circuit breaker (13) is in a transient state of insertion / withdrawal or is fully inserted, the shutter (14) of the shutter assembly (18) may be opened, exposing the user to the risk of electric shock. Therefore, when the insertion / withdrawal operation is performed, the door (12) must be restricted from being opened.

[0015] The door interlock assembly (16) has a function of restricting the door (12) from being opened arbitrarily when the circuit breaker (13) is moved inward from the cradle (11).

[0016] Fig. 6 shows a door interlock assembly (16), in which a door interlock link (21) and a door interlock plate (22) are fastened with bolts (23).

[0017] The pin bolt (24) at the rear end of the door interlock link (21) is assembled to the side plate of the cradle (11), and the protrusion (27) at the rear end of the door interlock link (21) is positioned adjacent to the circuit breaker (13) so that when the circuit breaker (13) is moved to a specific position, the door interlock assembly (16) is moved.

[0018] Referring to Figures 7, 8, and 9, the structure and operation of the door (12) are as follows.

[0019] When the door handle (31) is operated in the operating direction (a) of Fig. 9 to open the door (12), the door lock plate (32) moves in the operating direction (b) of Fig. 9. When the door lock protrusion (33) completely leaves the locking part (17) of the cradle (11), the door (12) can be opened.

[0020] When closing the door (12), the door is closed by pulling the door handle (31) in the operating direction (a) so that the door lock protrusion (33) does not interfere with the locking part (17) at the front edge of the cradle (11) as in the above method.

[0021] Figure 10 illustrates the door handle and related parts.

[0022] Since the insertion groove opening / closing plate (37) is assembled to the door lock plate (32), it operates in the same direction (b), and when the door handle (31) is operated, the door interlock plate passage groove (38) of the door cover corner (36) is blocked by the insertion groove opening / closing plate (37), so that the door interlock plate (22) can no longer pass through.

[0023] The insertion groove opening / closing plate (37) is assembled with an assembly bolt (39). In order to release the door interlock function when the door is closed, the rubber cap (40) inserted into the door (12) must be removed, and then the assembly bolt (39) must be disassembled to remove the insertion groove opening / closing plate (37) of the door interlock plate portion (35).

[0024] Figures 10 to 17 show a state in which a circuit breaker (13) is placed within a cradle (11).

[0025] In the disconnected positions of FIGS. 11, 12, and 13, the door interlock plate (22) does not interfere with the insertion groove opening / closing plate (37), so the door lock plate (32) can be operated freely, allowing the door (12) to be opened and closed, and the circuit breaker (13) to be freely taken out.

[0026] Figures 14, 15, and 16 show when the circuit breaker (13) reaches the test position, and when the circuit breaker (13) is moved from the disconnected position to the test position, the interlocking plate (26) interlocked with the circuit breaker (13) rotates clockwise around the rotation axis (24), and accordingly, the door interlock assembly (16) moves forward.

[0027] The door interlock plate (22) is inserted into the door interlock plate passage groove (38), and the opening of the door (12) is restricted by interference between the door interlock plate (22) and the insertion groove opening / closing plate (37), and the door can be opened at that position only when the assembly bolt (39) is disassembled.

[0028] Fig. 17 shows a situation in which the door (12) is closed when the door interlock assembly (16) is operated. That is, it describes a method of closing the door after inserting the circuit breaker (13) while the door (12) is open.

[0029] In order to close the door (12), the door handle (31) must be opened so that there is no interference between the locking part (17) of the cradle (11) and the door lock protrusion (33).

[0030] At this time, the insertion groove opening / closing plate (37) raised by the operation of the handle (31) faces the protruding door interlock plate (22), so the door (12) cannot be closed due to interference between the two parts. The door interlock assembly (16) must be returned to its original position, or the insertion groove opening / closing plate (37) must be removed by dismantling the assembly bolt (39) through the through hole (12a) of the door (12) to close the door (12) (see Fig. 10).

[0031] In actual use of circuit breakers, depending on the user's operating environment, the door may need to be opened for maintenance or other reasons while the circuit breaker is in operation. Furthermore, circuit inspections may require the door to be opened and then the door closed.

[0032] In conventional technology, it is difficult to close a door when the circuit breaker is inserted in the test or operating position, or when the circuit breaker is in an excessively moving state. In this case, closing the door requires removing the door interlock interlock plate, thereby disabling the door interlock function, which is inconvenient.

[0033] Meanwhile, since the insertion groove opening plate and bolt cannot be reassembled while the door is closed, there is an inconvenience in that the circuit breaker must be moved to the disconnected position and then the door must be opened to reassemble the insertion groove opening plate in order to restore the door interlock function.

[0034] As prior art related to the present invention, reference may be made to Korean Patent Application No. 10-2021-0096572 entitled “Shutter assembly, locking device and distribution board including same” and Korean Utility Model Application No. 20-2021-0002397 entitled “Distribution board door.”

[0035] The present invention has been devised to solve the above-mentioned problem, and its purpose is to provide a door interlock device of a distribution panel that can release the door interlock function so that the door can be selectively opened in a situation where the opening of the distribution panel door is restricted.

[0036] In addition, a door interlock device of a distribution board is provided that allows the door to be closed when the circuit breaker is in the operating position while the door is open.

[0037] According to one embodiment of the present invention, a door interlock device of a distribution panel includes: a distribution panel door having a door interlock plate insertion groove; a door interlock plate that restricts opening of the distribution panel door when inserted into the door interlock plate insertion groove; and a door interlock rod to which the door interlock plate is coupled and which moves in conjunction with the insertion and withdrawal of a circuit breaker; wherein the door interlock plate is slidably coupled to the door interlock rod, such that in a disconnected position of the circuit breaker, the door interlock plate is separated from the interlock plate insertion groove, and in a test position or an operating position of the circuit breaker, the door interlock plate is inserted into the interlock plate insertion groove, and when the door interlock plate is pushed rearward, the door interlock plate is withdrawn from the door interlock plate insertion groove.

[0038] Here, the door interlock rod is provided with an interlock guide member that guides the movement of the door interlock plate, and a sliding hole is formed in the door interlock plate into which the interlock guide member is coupled so as to be able to slide.

[0039] Additionally, the interlock guide member is composed of a pin or a bolt.

[0040] Additionally, a door interlock plate return member is provided between the door interlock rod and the door interlock plate.

[0041] In addition, the door interlock rod is provided with a first return member mounting portion on which one end of the door interlock plate return member is installed, and the door interlock plate is provided with a second return member mounting portion on which the other end of the door interlock plate return member is installed.

[0042] Additionally, the door interlock plate includes a sliding joint that is slidably connected to the interlock guide member and an extension that extends from the sliding joint in an “L” shape.

[0043] Additionally, a locking portion is formed at the front end of the extension portion that extends forward and can be inserted into the door interlock plate insertion groove.

[0044] In addition, a linkage plate is provided on one side of the circuit breaker, which rotates according to the movement of the circuit breaker, and to which the door interlock rod is connected, and when the circuit breaker is brought into the test position, the linkage plate rotates so that the door interlock rod moves along the length direction, and the locking part is inserted into the door interlock plate insertion groove.

[0045] Additionally, an emergency opening hole is formed in the switchboard door to allow access to the door interlock plate.

[0046] In addition, the above distribution panel door is provided with an insertion groove opening / closing plate that opens and closes the door interlock plate insertion groove while moving up and down according to the action of the door handle.

[0047] According to the door interlock device of the distribution panel according to the present invention, in a situation where the opening of the distribution panel door is restricted by the door interlock device, the interlock function of the door interlock device can be selectively released to open the distribution panel door.

[0048] The user can easily release the interlock function of the door interlock device by pushing the door interlock plate backward through the emergency opening hole in the distribution panel door.

[0049] Accordingly, the door interlock device operates normally in normal times to protect workers, and in special cases such as maintenance, the interlock function of the door interlock device can be released to perform necessary work.

[0050] Additionally, if the door is opened while the circuit breaker is in operation, the door can be closed simply by opening the handle of the switchboard door without stopping the circuit breaker. In other words, the door can be closed in the same way as it would normally be closed. In this case, the door interlock function of the door interlock device is immediately restored without any additional action.

[0051] That is, the door can be opened regardless of the position of the circuit breaker or closed without changing the operating status of the circuit breaker.

[0052] Figure 1 is a perspective view of a distribution panel according to the prior art.

[0053] Figure 2 is a perspective view showing the switchboard of Figure 1 with the door and switchboard side panel removed and the circuit breaker positioned in the disconnect position.

[0054] Figure 3 is a perspective view showing the circuit breaker placed at the test position in the distribution panel of Figure 2.

[0055] Fig. 4 is a perspective view showing the circuit breaker positioned in the connected position in the distribution panel of Fig. 2.

[0056] Fig. 5 is a perspective view showing the circuit breaker removed from the distribution panel of Fig. 2.

[0057] FIG. 6 is a perspective view illustrating a door interlock assembly according to one embodiment of the present invention.

[0058] FIG. 7 is a drawing showing the back surface of a door cover according to one embodiment of the present invention.

[0059] Figures 8 and 9 are drawings showing the door sliding plate and door handle portion illustrated in Figure 7.

[0060] Figure 10 is a drawing showing the disassembled configuration of some parts of the door cover.

[0061] FIGS. 11 to 13 are drawings showing a circuit breaker in a disconnected position in a distribution panel according to one embodiment of the present invention.

[0062] Figures 14 to 16 are drawings showing a circuit breaker in a test position in a distribution panel according to one embodiment of the present invention.

[0063] Figure 17 is a drawing showing the circuit breaker moved to the connected position (driving position) in the door open state.

[0064] Fig. 18 is a perspective view of a distribution panel according to one embodiment of the present invention.

[0065] Fig. 19 is a perspective view showing the door and the side panel of the distribution board of Fig. 18 removed and the circuit breaker positioned in the disconnect position.

[0066] Fig. 20 is a perspective view showing the circuit breaker placed in the test position in the distribution panel of Fig. 19.

[0067] Fig. 21 is a perspective view showing the circuit breaker placed in a connected position in the distribution panel of Fig. 19.

[0068] Fig. 22 is a perspective view showing the circuit breaker removed from the distribution panel of Fig. 19.

[0069] Figure 23 is a perspective view from another direction showing the distribution panel of Figure 18 with the distribution panel side panel removed and the circuit breaker positioned in the disconnect position.

[0070] Fig. 24 is a drawing showing the back surface of a door cover according to one embodiment of the present invention.

[0071] Figures 25 and 26 are drawings showing a door sliding plate and a door handle portion.

[0072] FIG. 27 is a perspective view of a door interlock assembly according to one embodiment of the present invention.

[0073] Fig. 28 is a plan view of the door interlock plate portion in Fig. 27.

[0074] Fig. 29 is a perspective view of the door interlock plate in Fig. 27.

[0075] FIG. 30 and FIG. 31 are drawings showing a circuit breaker in a disconnected position in a distribution panel according to one embodiment of the present invention.

[0076] FIG. 32 and FIG. 33 are drawings showing a circuit breaker in a test position in a distribution panel according to one embodiment of the present invention.

[0077] Figures 34a to 34d are diagrams showing the operation of the door interlock function and the door interlock function release.

[0078] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, these drawings are intended to provide a detailed description sufficient to enable those skilled in the art to easily practice the invention, and are not intended to limit the technical spirit or scope of the present invention.

[0079] The terms “absence” or “part” used to refer to components in the present invention are not used for any limiting purpose and may be omitted.

[0080] Referring to the drawings, a door interlock device of a distribution panel according to each embodiment of the present invention will be described in detail.

[0081] FIG. 18 is a perspective view of a distribution board according to an embodiment of the present invention, FIG. 19 is a perspective view of the distribution board of FIG. 18 with a door and a distribution board side panel removed and a circuit breaker positioned in a disconnect position, FIG. 20 is a perspective view of the distribution board of FIG. 19 with a circuit breaker positioned in a test position, FIG. 21 is a perspective view of the distribution board of FIG. 19 with a circuit breaker positioned in a connected position, FIG. 22 is a perspective view of the distribution board of FIG. 19 with a circuit breaker removed, and FIG. 23 is a perspective view of the distribution board of FIG. 18 with a circuit breaker positioned in a disconnect position when viewed from another direction.

[0082] A door interlock device of a distribution panel according to one embodiment of the present invention comprises: a distribution panel door (300) having a door interlock plate insertion groove (311a); A door interlock device (400) having a door interlock plate (490) that restricts the opening of the distribution panel door (300) when inserted into the door interlock plate insertion groove (311a) and a door interlock rod (480) to which the door interlock plate (490) is coupled and which moves in conjunction with the insertion and withdrawal of the circuit breaker (150); wherein the door interlock plate (490) is slidably coupled to the door interlock rod (480), so that in the disconnected position (first state) of the circuit breaker (150), the door interlock plate (490) is separated from the interlock plate insertion groove (311a), and in the test position (second state) or the operating position (third state) of the circuit breaker, the door interlock plate (490) is inserted into the interlock plate insertion groove (311a), and when the door interlock plate (490) is pushed backward, the door interlock It is characterized in that the plate (490) is withdrawn from the door interlock plate insertion groove (311a).

[0083] A distribution panel (1000) according to one embodiment of the present invention includes a distribution panel case (or circuit breaker room or cradle) (100), a distribution panel door (300), and a door interlock device (400).

[0084] The distribution panel enclosure (100) may be formed as a rectangular box structure. The distribution panel enclosure (100) is provided with a side plate (102).

[0085] The distribution panel enclosure (100) is manufactured to accommodate a circuit breaker (150). The circuit breaker (150) moves to a disconnected position (first state), a test position (second state), and a connected position (third state) within the distribution panel enclosure (100). In this way, when the circuit breaker (150) is provided in the distribution panel enclosure (100), the distribution panel compartment at this time is called a circuit breaker room. Meanwhile, a case or enclosure manufactured for storing a circuit breaker is also called a cradle. The front of the enclosure (100) of the cradle can be opened.

[0086] A distribution panel door (300) is provided on the front of the distribution panel case (100). The distribution panel door (300) is provided with a hinge at one corner and is connected to one corner of the distribution panel case (100) with a hinge structure, and can be rotated like a swing door to open and close the opening of the distribution panel case (100).

[0087] The circuit breaker body (151) may include a vacuum interrupter that opens and closes a current path by having a movable contact portion and a fixed contact portion inside a vacuum container.

[0088] Inside the distribution panel case (100), a distribution panel terminal (110), a circuit breaker entry rail (160), a circuit breaker transfer unit (170), etc. can be placed.

[0089] The distribution panel terminal (110) is arranged on the back of the distribution panel case (100). The distribution panel terminal (110) is connected to a power source or a load. When the circuit breaker body (151) is moved to the rear of the distribution panel case (100), i.e., the operating position (connected position, service position), the circuit breaker terminal (155) is connected to the distribution panel terminal (110), so that current can be supplied from the power source to the load side through the main circuit of the circuit breaker (150).

[0090] In addition, when the circuit breaker body (151) is moved to the front of the distribution panel case (100), i.e., to the test position, the circuit breaker terminal (155) is separated from the distribution panel terminal (110), so that the current supply from the power source to the load through the main circuit of the circuit breaker (150) can be cut off.

[0091] The circuit breaker transfer unit (170) moves the circuit breaker (150) forward and backward within the distribution panel enclosure (100). The circuit breaker transfer unit (170) can move the circuit breaker (150) to a disconnected position, a test position, and an operating position.

[0092] The circuit breaker transport unit (170) is provided with a moving frame (153) for supporting the lower part of the circuit breaker (150) and moving wheels (158) on both side corners of the moving frame (153), so that the circuit breaker (150) can be smoothly transported in the front-back direction within the distribution panel enclosure (100).

[0093] The circuit breaker entry rail (160) can guide the child wheel (158) of the moving frame (153) of the circuit breaker (150) during the process of moving the circuit breaker (150) by the circuit breaker transfer unit (170). The moving wheel (158) moves along the circuit breaker entry rail (160).

[0094] Meanwhile, a switchboard case hole (103a) may be formed at the front edge (103) of the switchboard case (100). The switchboard case hole (103a) provides a space through which a door interlock plate (490), which is part of a door interlock device (400), can move toward the switchboard door (300) as the interlock plate (470) rotates due to movement of the circuit breaker (150) inside the switchboard case (100).

[0095] Referring to Fig. 22, a door interlock plate (490) of a door interlock device (400) can pass through a hole (103a) of a distribution panel case formed at a front edge (103) of a distribution panel case (100).

[0096] The distribution panel door (300) is placed on the front of the distribution panel case (100). Referring to Fig. 18, the distribution panel door (300) is placed to cover the distribution panel case (100).

[0097] In addition, the distribution panel door (300) can be installed so that one side is fixed to the distribution panel case (100) and the other side can be rotated to open and close.

[0098] FIG. 24 shows a back surface of a door cover according to one embodiment of the present invention, FIGS. 25 and 26 show a door sliding plate and a door handle portion, and FIG. 27 shows a perspective view of a door interlock assembly according to one embodiment of the present invention.

[0099] The distribution panel door (300) includes a door cover (310). A hinge member (312) for fixing to the distribution panel case (100) may be installed on one side of the door cover (310). The door cover (310) may rotate relative to the distribution panel case (100) around the hinge member (312). That is, the door cover (310) rotates around the hinge member (312).

[0100] On the opposite side where the hinge member (312) of the door cover (310) is arranged, the door cover corner portion (311) protrudes toward the inside of the door cover (310).

[0101] A door interlock plate insertion groove (311a) is formed in the corner portion (311) of the door cover through which a door interlock plate (490) to be described later can pass. The door interlock plate (490) can be inserted into or withdrawn from the door interlock plate insertion groove (311a) described above. At this time, the door interlock plate insertion groove (311a) is formed at a position corresponding to the door interlock rod (480) in the corner portion (311) of the door cover.

[0102] When the door interlock plate (490) is inserted into the door interlock plate insertion groove (311a), the movement of the door sliding plate (340) is restricted, so that the door handle portion (320) cannot be opened or closed. When the door interlock plate (490) is withdrawn from the door interlock plate insertion groove (311a), the movement of the door sliding plate (340) is not restricted, so that the door handle portion (320) can be opened or closed.

[0103] A door handle portion (320) is arranged on the opposite side of the door cover (310) on which the hinge portion (312) is installed. The door handle portion (320) is installed on the opposite side to the side on which the hinge portion (312) is installed. By opening and closing the door handle portion (320), i.e., by opening or closing the door handle portion (320), the door cover (310) is closed or opened with respect to the distribution panel enclosure (100).

[0104] The upper part of the door handle (320) is hinge-connected to the distribution panel door (300), and its lower part is structured to be rotatable forward. The door handle (321) of the door handle (320) can be pulled forward by the user's hand. In addition, when the door handle (320) is released, it can be moved to its original position by a motion recovery means, such as a spring, built into the door handle (320).

[0105] The distribution panel door (300) further includes a door sliding plate (340) that moves up and down in conjunction with the opening and closing operation of the door handle (320).

[0106] The door sliding plate (340) moves upward when the door handle (321) of the door handle portion (320) is opened, and moves downward when the door handle (321) of the door handle portion (320) is closed. In other words, the door sliding plate (340) is configured to be able to move in either the up or down direction in conjunction with the opening or closing operation of the door handle portion (320).

[0107] A plurality of door lock pins (341) may be provided on the door sliding plate (340). The door lock pins (341) may have a shape that protrudes downward from a plurality of concave grooves (340a) provided spaced apart from each other vertically on the door sliding plate (340).

[0108] The door lock pin (341) can be inserted into the insertion hole (121) of the door lock pin insertion portion (120) provided at the front edge (103) of the distribution panel case (100) as the door sliding plate (340) moves downward. When the door lock pin (341) is inserted into the door lock pin insertion portion (120), the distribution panel door (300) is fixed to the distribution panel case (100) and closed.

[0109] By inserting the door lock pin (341) of the door sliding plate (340) into the door lock pin insertion groove (121) formed in the door lock pin insertion portion (120) placed in the distribution panel case (100), the door cover (310) and the distribution panel case (100) can be locked to each other.

[0110] That is, after the door cover (310) is closed by being pressed against the distribution panel case (100), the door handle part (320) of the door cover (310) is closed, thereby allowing the door sliding plate (340) to move downward. As the door sliding plate (340) moves downward, the door lock pin (341) of the door sliding plate (340) is inserted into the door lock pin insertion groove (121). Accordingly, the door cover (310) and the distribution panel case (100) can be locked to each other. In order to separate the door cover (310) from the distribution panel case (100), the reverse order of operations may be followed.

[0111] The shutter assembly (200) will be described in relation to the action according to the position movement of the circuit breaker (150). Reference may be made to FIGS. 19 to 23, FIGS. 30 to 33, etc.

[0112] The shutter assembly (200) opens and closes the shutter (211) located inside the distribution panel case (100) as the circuit breaker (150) moves inside the distribution panel case (100), thereby allowing or restricting access to the distribution panel terminal (110).

[0113] Depending on the position of the circuit breaker (150), it can be changed to a first state in which it is placed in a disconnected state inside the distribution panel case (100), a second state in which it is placed in a test state, and a third state in which it is placed in a connected state connected to the distribution panel terminal (110).

[0114] The shutter assembly (200) blocks the distribution board terminal (110) depending on the position of the circuit breaker (150) (disconnect position (first state), test position (second state) and connect position (third state)), and also releases the blocking of the distribution board terminal (110) so that the distribution board terminal (110) is connected to the circuit breaker (150).

[0115] Specifically, when the circuit breaker (150) is in the disconnect position and the test position, the shutter assembly (200) acts to block the distribution panel terminal (110) to prevent an accident that may occur when current flows through the distribution panel terminal (110).

[0116] And, the shutter assembly (200) is released so that the switchboard terminal (110) that was blocked during the process of the circuit breaker (150) moving from the test position to the connected position (service position, energized position) can be connected to the circuit breaker (150).

[0117] The shutter locking device (290) restricts the rotation of the shutter assembly (200) in the disconnected state and the test state. In addition, when the circuit breaker (150) moves inside the switchboard case (100) and advances to the operating position, the shutter locking device (290) rotates the shutter assembly (200) to open the switchboard terminal (110).

[0118] That is, the shutter locking device (290) can lock or unlock the rotation of the shutter assembly (200) so that the shutter assembly (200) can rotate or not rotate. Through this, it is possible to prevent accidents from occurring due to the shutter assembly (200) rotating in an uncontrolled situation.

[0119] The shutter assembly (200) is configured and functions to open and close the distribution panel terminal (110) placed inside the distribution panel case (100).

[0120] Specifically, the shutter assembly (200) includes a plurality of shutter plates (210; 211, 212), a plurality of shutter levers (220; 221, 222), and a plurality of connecting links (240; 241, 242). In addition, the shutter assembly (200) may include a main link (260).

[0121] The shutter plate (210) is configured to open and close the distribution panel terminal (110). The shutter plate (210) can be placed in front of the distribution panel terminal (110) to block the distribution panel terminal (110).

[0122] Referring to FIGS. 20 and 21, the shutter plate (210) can be rotated toward the top or bottom of the distribution board terminal (110) so that the front of the distribution board terminal (110) is exposed as another component (e.g., the main link (260)) rotates. By rotating the shutter plate (210), the distribution board terminal (110) can be opened to a state in which it can conduct current with the circuit breaker terminal (155).

[0123] The plurality of shutter plates (210) may include an upper shutter plate (211) that blocks the distribution panel terminal (110) (e.g., power side terminal) arranged at the top and a lower shutter plate (212) that blocks the distribution panel terminal (110) (e.g., load side terminal) arranged at the bottom (see FIG. 31).

[0124] The shutter lever (220) is connected at one end to the shutter plate (210) and is configured to be rotatable.

[0125] The shutter lever (220) may include an upper shutter lever (221) connected to the upper shutter plate (211) and a lower shutter lever (222) connected to the lower shutter plate (212).

[0126] The shutter lever (220), i.e., the upper shutter lever (221) and the lower shutter lever (222), are configured to allow the plurality of shutter plates (210) to rotate in different directions. The upper shutter lever (221) and the lower shutter lever (222) rotate in different directions toward the upper and lower sides, respectively. Through this, the distribution panel terminal (110) can be opened.

[0127] The connecting link (240) connects a plurality of shutter levers (220) and a main link (260), and is configured to be movable so that the shutter lever (220) rotates according to the action of the main link (260).

[0128] The connecting link (240) may include an upper connecting link (241) connecting the upper shutter lever (221) and the lower shutter lever (222) and a lower connecting link (242) connecting the lower shutter lever (222) and the main link (260).

[0129] The upper connecting link (241) connects the upper shutter lever (221) and the lower shutter lever (222). In addition, the lower connecting link (242) can connect the lower shutter lever (222) and the main link (260).

[0130] At this time, the lower connecting link (242) can be connected to the lower shutter lever (222) at the point where the upper connecting link (241) is connected to the lower shutter lever (222). That is, the upper connecting link (241) and the lower connecting link (242) can be connected at the same point of the lower shutter lever (222).

[0131] The main link (260) is connected to the connecting link (240), and as the circuit breaker (150) is introduced, the connecting link (240) can be moved downward. However, the connecting link (240) can also be moved downward using a configuration other than the main link (260). When the lower connecting link (242) is moved downward, the upper connecting link (241) and the lower connecting link (242) can move and rotate, thereby rotating the upper shutter plate (211) and the lower shutter plate (212) in different directions, respectively.

[0132] The main link (260) may be arranged in a path through which the circuit breaker (150) is inserted into the distribution panel (1000), and as the circuit breaker (150) is inserted, the main link (260) may be pressurized by at least a portion of the circuit breaker so as to rotate around one axis.

[0133] According to one embodiment, the main link (260) may be arranged in a path through which the circuit breaker (150) is inserted into the distribution panel enclosure (100), and as the circuit breaker (150) is inserted, the main link (260) may be pressed by a wheel provided at the bottom of the circuit breaker (150) so that the main link (260) rotates around one axis.

[0134] The operation of the shutter assembly (200) is described with reference to the above-described configuration as follows.

[0135] When the circuit breaker (150) is placed in the disconnected position (first state) and the test position (second state), the main link (260) does not rotate. At this time, the shutter plate (210) of the shutter assembly (200) is placed to block the distribution board terminal (110). Refer to FIGS. 19, 20, and 30 to 33. Here, FIGS. 30 and 31 show the disconnected position of the circuit breaker, and FIGS. 32 and 33 show the test position of the circuit breaker.

[0136] In the process of the circuit breaker (150) moving to the connected position (third state), the circuit breaker wheel (158) presses downward against the catch (263) of the main link (260) and enters. Accordingly, the main link (260) can rotate around one axis.

[0137] Accordingly, the connecting link (240) connected to the main link (260) can be moved downward. Since the lower connecting link (242) and the upper connecting link (241) are connected, the lower connecting link (242) and the upper connecting link (241) are moved downward.

[0138] Accordingly, the upper shutter lever (221) rotates upward, and the lower shutter lever (222) rotates downward. Then, the upper shutter plate (211) connected to the upper shutter lever (221) and the lower shutter plate (212) connected to the lower shutter lever (222) rotate upward and downward, respectively. The open state of the shutter assembly can be seen with reference to FIG. 21.

[0139] And, when the circuit breaker (150) moves from the third state to the second state and the first state again, the main link (260) returns upward and the shutter lever (220) also moves upward, so that the shutter plate (210) rotates in the opposite direction to shield the distribution board terminal (110) again.

[0140] According to a shutter assembly (200) and a distribution board (1000) according to one embodiment of the present invention, as the circuit breaker (150) enters the inside of the distribution board case (100), the circuit breaker body (151) presses the shutter assembly (200), so that the shutter assembly (200) can shield or open the distribution board terminal (110).

[0141] The shutter locking device (290) is arranged inside the distribution board (1000) and is configured to lock or unlock the shutter assembly (200) that opens and closes the terminal of the distribution board terminal (110).

[0142] Referring to FIG. 22, the shutter locking device (290) may include a rotating part (291, 292, 295), a shutter locking plate (294), a linkage plate (470), and a connecting rod (296).

[0143] The rotating portion (291, 292, 295) is arranged adjacent to the shutter plate (210) of the shutter assembly (200) and is configured to be rotatable. The rotating portion can lock or unlock the shutter plate (210) through rotation and interference with the shutter locking plate (294). The rotating portion may include a fixed plate (291), a rotating rod (292), and a rotating portion plate (295).

[0144] The shutter locking plate (294) is coupled to the rotating part and rotates together with the rotating part. Specifically, when the circuit breaker body (151) presses the linkage plate (470), the linkage plate (470) rotates. Accordingly, the rotating part plate (295) rotates through the connecting rod (296) connected to the linkage plate (470). In addition, the shutter locking plate (294) connected to the rotating part plate (295) can rotate.

[0145] The interlocking plate (470) will now be described. FIG. 27 illustrates a perspective view of a door interlock assembly and an interlocking plate according to one embodiment of the present invention. For details on the operation of the interlocking plate (470), please refer to FIGS. 30 and 32.

[0146] The linkage plate (470) is connected to the shutter locking device (290) on one side and to the door interlock device (400) on the other side. The linkage plate (470) rotates when the engaging portion (478) is pressed by the circuit breaker body (151) during the process of inserting the circuit breaker (150) into the interior of the distribution board (1000), thereby operating the shutter locking device (290) and the door interlock device (400).

[0147] The linkage plate (470) rotates around the plate rotation axis (471). An axis hole (471a) to which the plate rotation axis (471) is coupled is formed in the linkage plate (470).

[0148] A first fastening member (472) is provided to connect one end of the linkage plate (470) and the connecting portion (481) of the door interlock rod (480). A first fastening hole (472a) to which the first fastening member (472) is connected is formed in the linkage plate (470).

[0149] A plate return member (473) is provided at one end of the linkage plate (470).

[0150] At the other end of the linkage plate (470), a plate catch (478) that catches the front end of the circuit breaker body (151) is protrudingly formed.

[0151] A second fastening member (474) is provided to connect the other end of the connecting plate (470) and the connecting rod (296). A second fastening hole (474a) to which the second fastening member (474) is connected is formed in the connecting plate (470).

[0152] The connecting rod (296) has one end connected to the rotating plate (295) and the other end connected to the linkage plate (470). The connecting rod (296) rotates the rotating plate (295) as the linkage plate (470) rotates.

[0153] The shutter locking plate (294) is placed in a position to prevent rotation of the shutter plate (210) before the linkage plate (470) is pressed and rotated by the breaker (150). That is, the shutter locking plate (294) restricts the movement of the shutter plate (210) in the disconnected position and the test position.

[0154] Referring to FIGS. 30 and 31, the circuit breaker (150) is in a first state (disconnected position) inside the distribution panel case (100). In this case, the circuit breaker (150) does not pressurize the interlock plate (470). Accordingly, the shutter locking device (290) and the door interlock device (400) do not operate.

[0155] Referring to FIGS. 32 and 33, the circuit breaker (150) is in a second state (test position) inside the distribution panel case (100). In this case, the circuit breaker (150) presses the interlocking plate (470) to rotate it clockwise by a predetermined angle. Accordingly, the shutter locking device (290) and the door interlock device (400) operate. (However, the shutter assembly (200) is not yet in operation. The shutter assembly (200) operates when the circuit breaker (150) moves from the second state to the third state.)

[0156] As the connecting plate (470) is pressurized, the connecting rod (296) moves toward the shutter plate (210). Accordingly, the rotating plate (295) connected to the connecting rod (296) rotates. Meanwhile, the door interlock device (400) operates.

[0157] Let's explain in detail the part related to door interlock.

[0158] First, the part related to the distribution panel door (300) will be described. Refer to FIGS. 24 to 26.

[0159] The door sliding plate (340) of the distribution panel door (300) may further include a door interlock plate portion (350) that can be positioned to cover or not cover the door interlock plate insertion groove (311a) of the front edge portion (311) of the door as the door sliding plate (340) moves up and down.

[0160] The door interlock plate portion (350) may include an insertion groove opening / closing plate (351), a connecting plate (352), and a connecting member (353).

[0161] The insertion groove opening / closing plate (351) is coupled to the door sliding plate (340). Accordingly, the insertion groove opening / closing plate (351) can be moved in the direction in which the door sliding plate (340) moves.

[0162] The insertion groove opening / closing plate (351) may have a roughly rectangular shape that is elongated vertically. However, this is not limited to this, and the shape that can open / close the door interlock plate insertion groove (311a) described above may have various shapes such as a square, triangle, or pentagon.

[0163] The connecting plate (352) is a connecting member for connecting the insertion groove opening / closing plate (351) and the door sliding plate (340) to each other. One end of the connecting plate (352) is connected to the door sliding plate (340), and moves together as the door sliding plate (340) moves up and down. The connecting plate (352) is connected to the door sliding plate (340) by a fastening member (354).

[0164] The door sliding plate (340) may have a plate shape with a long side in one direction. In addition, the door cover corner portion (311) may have a plate shape with a long side in a direction perpendicular to the direction in which the long side of the door sliding plate (340) is located.

[0165] Accordingly, the insertion groove opening / closing plate (351) having a roughly square plate shape must be positioned with its long side (i.e., main plane) facing the door interlock plate insertion groove (311a) formed in the corner portion (311) of the door cover so as to cover the door interlock plate insertion groove (311a).

[0166] Accordingly, the connecting plate (352) may be a plate having two sides bent at a 90-degree angle. However, it is not limited to this shape, and may be bent less than 90 degrees or more than 90 degrees depending on the design.

[0167] A plurality of connecting members (353) may be provided. Some connecting members (353) connect the door sliding plate (340) and the connecting plate (352). In addition, other connecting members (353) connect the connecting plate (352) and the insertion groove opening / closing plate (351). Through this, the door sliding plate (340), the connecting plate (352), and the insertion groove opening / closing plate (351) can be moved as one unit.

[0168] The door sliding plate (340) can rise along the door sliding plate (340) when the door handle part (320) is opened, and can descend along the door sliding plate (340) when the door handle part (320) is closed.

[0169] Referring to Fig. 25, the insertion groove opening / closing plate (351) is positioned downward so that the door interlock plate insertion groove (311a) opens when the door sliding plate (340) is lowered. The position where the insertion groove opening / closing plate (351) opens the door interlock plate insertion groove (311a) is referred to as the first position.

[0170] And, referring to Fig. 26, the insertion groove opening / closing plate (351) is moved upward and positioned to cover the door interlock plate insertion groove (311a) when the door sliding plate (340) rises. The position where the insertion groove opening / closing plate (351) closes the door interlock plate insertion groove (311a) is referred to as the second position.

[0171] The opening and closing operation of the door interlock plate (490) and the distribution panel door (300) is described.

[0172] When the door handle portion (320) is open, the insertion groove opening / closing plate (351) closes the door interlock plate insertion groove (311a). Then, when the door handle portion (320) is closed, the insertion groove opening / closing plate (351) opens the door interlock plate insertion groove (311a).

[0173] If the door interlock plate insertion groove (311a) is closed by the insertion groove opening / closing plate (351), the door interlock plate (490) cannot enter the door interlock plate insertion groove (311a). That is, when the door handle portion (320) is open, the door interlock plate (490) cannot enter the door interlock plate insertion groove (311a). Therefore, when the door handle portion (320) is open, the entry of the circuit breaker is restricted.

[0174] Conversely, when the door interlock plate (490) is inserted into the door interlock plate insertion groove (311a), the insertion groove opening / closing plate (351) cannot be raised. In the process of raising the insertion groove opening / closing plate (351), the insertion groove opening / closing plate (351) is caught by the door interlock plate (490) inserted into the door interlock plate insertion groove (311a), so that the insertion groove opening / closing plate (351) can no longer be raised. Accordingly, the opening of the door handle portion (320) is restricted, and the opening of the distribution panel door (300) is restricted.

[0175] In other words, in order for the insertion groove opening / closing plate (351) to rise, the door handle part (320) must change from a closed state to an open state, but when the door interlock plate (490) is inserted into the door interlock plate insertion groove (311a), the door handle part (320) cannot change from a closed state to an open state.

[0176] The door interlock device (400) will be described. Fig. 27 is a perspective view of a door interlock assembly according to one embodiment of the present invention, Fig. 28 is a plan view of a door interlock plate portion in Fig. 27, and Fig. 29 is a perspective view of the door interlock plate in Fig. 27.

[0177] The door interlock device (400) includes a door interlock rod (480) connected to a linkage plate (470) and a door interlock plate (490) slidably coupled to the door interlock rod (480).

[0178] The door interlock rod (480) is connected to the linkage plate (470) and is installed on the side plate (102) so as to be able to move forward and backward.

[0179] The door interlock rod (480) has a connecting portion (481) protruding to one side to be coupled with a linkage plate (470) at one end. The door interlock rod (480) has a door interlock plate (490) at the other end.

[0180] The connecting portion (481) is connected to the linkage plate (470) by the first fastening member (472). When the linkage plate (470) rotates, the door interlock rod (480) moves in conjunction therewith.

[0181] A guide member (483) and a guide member hole (482) are provided to guide the movement of the door interlock rod (480). The guide member (483) is fixed to the side plate (102) of the distribution panel case (100). A guide member hole (482) is formed in the body of the door interlock rod (480) so that the guide member (483) can slide. The guide member (483) is installed in the side plate (102) by penetrating the guide member hole (482) of the door interlock rod (480). A plurality of guide members (483) and guide member holes (482) may be provided. The guide member hole (482) is formed as a long hole so that the door interlock rod (480) can slide along the guide member (483) of the guide member hole (482).

[0182] Meanwhile, a load return member (484) is provided at one end of the door interlock rod (480), and when the force applied to the door interlock rod (480) is removed, the door interlock rod (480) is returned to its original position by the load return member (484).

[0183] In addition, the door interlock rod (480) is configured to move in the opposite direction to the connecting rod (296) when the linkage plate (470) rotates. That is, the door interlock rod (480) and the connecting rod (296) are connected to opposite sides based on the rotation axis (471) of the linkage plate (470), so that they move in opposite directions when the linkage plate (470) rotates. For example, when the linkage plate (470) moves clockwise, the door interlock rod (480) moves forward and the connecting rod (296) moves backward.

[0184] The other end (front end) of the door interlock rod (480) is provided with an interlock guide member (485) that supports the door interlock plate (490) and guides its movement. The interlock guide member (485) is inserted into a sliding hole (495) described later and fixed to the body of the door interlock rod (480). The interlock guide member (485) may be composed of a pin or a bolt.

[0185] A first return member mounting portion (486) for elastically supporting a door interlock plate (490) is formed by bending at the front end of the door interlock rod (480). A door interlock plate return member (498) is provided at the first return member mounting portion (486). When the force for moving the door interlock plate (490) is removed, the door interlock plate (490) is moved to its original position by the door interlock plate return member (498).

[0186] The door interlock device (400) further includes a door interlock plate (490) extending in a direction parallel to the longitudinal direction of the door interlock rod (480).

[0187] The door interlock plate (490) may include a sliding connection portion (491) that is slidably connected by a door interlock rod (480) and an interlock guide member (485), and an extension portion (492) that extends from the sliding connection portion (491) in the shape of an “L.” However, the door interlock plate (490) is not limited to being divided into the sliding connection portion (491) and the extension portion (492) described above, and may be formed integrally or in a different shape.

[0188] A plurality of sliding holes (495) are formed in the sliding joint (491) into which interlock guide members (485) are inserted for forward and backward movement of the door interlock plate (490). The door interlock plate (490) can slide along the interlock guide members (485) inserted and positioned in the sliding holes (495).

[0189] A second return member mounting portion (494) on which a door interlock plate return member (498) can be installed is formed by bending in the sliding joint portion (491).

[0190] A door interlock plate return member (498) is installed between the return member first mounting portion (486) of the door interlock rod (480) and the return member second mounting portion (494) of the door interlock plate (490). The door interlock plate return member (498) may be provided as a compression spring. Therefore, the door interlock plate return member (498) acts in a direction in which the door interlock rod (480) and the door interlock plate (490) move away from each other. Therefore, in FIG. 27, when the door interlock rod (480) is maintained in a fixed state, the door interlock plate (490) is placed in a forward direction unless an external force is applied.

[0191] If the user pushes the door interlock plate (490) in a backward direction, elastic force is stored in the door interlock plate return member (498), and when the user's force disappears, the door interlock plate (490) returns to its original position by the restoring force of the door interlock plate return member (498).

[0192] A locking portion (492a) is formed at the front end of the extension portion (492) and extends forward, and can be inserted into a door interlock plate insertion groove (311a) formed in the distribution panel door (300).

[0193] As the linkage plate (470) rotates, the door interlock plate (490) moves in the longitudinal direction of the door interlock rod (480), so that the locking portion (492a) is inserted into the door interlock plate insertion groove (311a) formed in the distribution panel door (300).

[0194] The door interlock plate (490) moves in the longitudinal direction of the door interlock rod (480) when the linkage plate (470) is rotated by the circuit breaker body (151). That is, the door interlock rod (480) moves forward toward the distribution panel door (300).

[0195] When the door interlock rod (480) moves in the direction toward the distribution panel door (300), the locking portion (492a) of the door interlock rod (480) penetrates at least a portion of the distribution panel door (300).

[0196] Specifically, referring to FIG. 22, etc., the door interlock plate (490) can first be pulled out of the distribution panel case (100) through the distribution panel case hole (103a) formed at the front edge (103) of the distribution panel case (100).

[0197] And, referring to FIG. 25 or FIG. 33, the door interlock plate (490) pulled out through the distribution panel outer case hole (103a) can protrude toward the door cover (310) along the door interlock plate insertion groove (311a) formed in the corner portion (311) of the door cover.

[0198] The door interlock plate (490) of the door interlock load (480) passes through the door interlock plate insertion groove (311a) during the process in which the circuit breaker (150) moves from the disconnected position (first state) to the test position (second state).

[0199] When the locking portion (492a) of the door interlock plate (490) is inserted into the door interlock plate insertion groove (311a), the insertion groove opening / closing plate (351) is restricted from moving from the first position to the second position. That is, when the door interlock plate (490) protrudes toward the door cover (310), the door handle (321) of the door handle portion (320) cannot be opened.

[0200] As described above, when the door handle (321) is opened (pulled), the insertion groove opening / closing plate (351) moves upwards and the insertion groove opening / closing plate (351) moves to the second position. However, when the circuit breaker (150) is in the operating position, the door interlock plate (490) is inserted into the door interlock plate insertion groove (311a), so that the insertion groove opening / closing plate (351) that is trying to rise upwards is restricted by the door interlock plate (490). Therefore, when the circuit breaker (150) is in the test position or the operating position, the door handle portion (320) is not opened and the switchboard door (300) is prevented from being opened arbitrarily.

[0201] The operation of the switchboard door (300) in the switchboard (1000) according to one embodiment of the present invention is summarized as follows.

[0202] By opening or closing the door handle (320) placed on the distribution panel door (300), the distribution panel door (300) can be unlocked or locked to the distribution panel case (100).

[0203] Referring to FIG. 25 or FIG. 31, the door handle portion (320) is in a closed state. At this time, the insertion groove opening / closing plate (351) is not covering (closing) the door interlock plate insertion groove (311a) formed in the door cover corner portion (311). That is, when the door handle portion (320) is in a closed state, the insertion groove opening / closing plate (351) is located in a first position that opens the door interlock plate insertion groove (311a).

[0204] When the door handle part (320) is in the closed state, the door sliding plate (340) is inserted into the door lock pin insertion groove (121) of the door lock pin insertion part (120), thereby restricting the opening of the door handle part (320) and restricting the door cover (310) from being opened from the distribution panel case (100).

[0205] And, referring to Fig. 26, the door handle portion (320) is in an open state. At this time, the insertion groove opening / closing plate (351) is in a state of covering (closing) the door interlock plate insertion groove (311a) formed in the door cover corner portion (311). That is, when the door handle portion (320) is in an open state, the insertion groove opening / closing plate (351) is located in a second position that closes the door interlock plate insertion groove (311a).

[0206] When the door handle part (320) is in the open state, the door sliding plate (340) is pulled out from the door lock pin insertion groove (121) of the door lock pin insertion part (120), thereby allowing the door cover (310) to be opened from the distribution panel case (100).

[0207] Next, we will explain the operation of the door interlock device.

[0208] When the switchboard door (300) is locked to the switchboard case (100), i.e., the door cover (310) is coupled to the switchboard case (100) and the door handle portion (320) is locked, the door handle portion (320) can be locked from being opened as the door interlock rod (480) penetrates at least a portion of the switchboard door (300). As the door handle portion (320) is locked from being opened, the door cover (310) is locked from being opened from the switchboard case (100).

[0209] When the circuit breaker (150) is brought into the second or third state, the door interlock plate (490) is inserted into the door interlock plate insertion groove (311a) formed in the door cover corner portion (311) and is placed on top of the insertion groove opening / closing plate (351). Accordingly, the insertion groove opening / closing plate (351) inserted into the door interlock plate insertion groove (311a) restricts movement of the insertion groove opening / closing plate (351).

[0210] In other words, as the circuit breaker (150) is inserted, the door interlock plate (490) is inserted into the door cover (310), thereby locking the door handle portion (320) from being switched from a locked state to an open state. Through this, depending on the position of the circuit breaker (150) inside the distribution panel case (100), the door handle portion (320) can be restricted from switching from a locked state to an open state, thereby locking the distribution panel door (300).

[0211] Next, a special case is described in which the interlock function of the door interlock device is temporarily released while the door interlock device is restricting the opening of the door.

[0212] An emergency opening hole (315) is formed in the door cover (310). The user can access the door interlock plate (490) through the emergency opening hole (315). Therefore, the door interlock plate (490) can be pushed backward using a tool or the like while it is inserted into the door interlock plate insertion groove (311a). In this case, the insertion groove opening / closing plate (351) is not obstructed by the door interlock plate (490), so it can move upward, and the switchboard door (300) can be opened. That is, even when the circuit breaker (150) is in an operating state, the user can open the switchboard door (300) by pushing the door interlock plate (490) in special cases such as an emergency situation or maintenance.

[0213] When a user pushes the door interlock plate (490), the door interlock plate (490) slides along the interlock guide member (485) and moves backward. At this time, the door interlock rod (480) remains in place. The door interlock plate return member (498) extends to store elastic force, and when the force applied to the door interlock plate (490) is removed, the restoring force is activated and the door interlock plate (490) returns to its original position.

[0214] Accordingly, the door sliding plate (340) can be raised, and the door handle portion (320) can be changed from a closed state to an open state. That is, the door lock pin (341) inserted into the door lock pin insertion groove (121) is pulled out, and the door cover (310) is separated from the distribution panel case (100), so that the distribution panel door can be opened.

[0215] In other words, the distribution board (1000) according to one embodiment of the present invention can move the door sliding plate (340) up and down by pushing the door interlock plate (490) backward through the emergency opening hole (315). That is, by removing the door interlock plate (490) from the door interlock plate insertion groove (311a), the door handle portion (320) locked by the door interlock plate (490) can be unlocked.

[0216] That is, when the door handle part (320) is in a locked state by the door interlock rod (480) and the door interlock plate (490), the door handle part (320) can be unlocked by pushing the door interlock plate (490) inward through the emergency opening hole (315) formed in the door cover (310).

[0217] Through this, when the door handle part (320) is in a locked state due to the arrangement of the circuit breaker (150) inside the distribution panel case (100), but there is a need to separate the door cover (310) from the distribution panel case (100) in a special situation, there is an advantage in that the door interlock plate (490) can be withdrawn from the door interlock plate insertion groove (311a) through the emergency opening hole (315) formed in the door cover (310), thereby releasing the locked state of the door handle part (320) in a simple manner.

[0218] The operation of the distribution panel door (300) and the door interlock device (400) according to the position of the circuit breaker (150) will be explained.

[0219] The disconnected state of the circuit breaker is shown in FIG. 30 and FIG. 31.

[0220] The circuit breaker body is moved forward, and the interlock plate (470) is in its original position. The door interlock rod (480) is moved backward, and the door interlock plate (490) is in a position spaced apart from the door interlock plate insertion groove (311a). Since there is no restriction on the movement of the door sliding plate (340), the distribution panel door (300) can be opened and closed.

[0221] The test status of the circuit breaker is shown in FIG. 32 and FIG. 33.

[0222] The circuit breaker body is moved rearward a predetermined distance, and the linkage plate (470) is pushed against the side of the circuit breaker body and rotated around its axis. The door interlock rod (480) is moved forward so that the door interlock plate (490) is in a position inserted into the door interlock plate insertion groove (311a). Since the movement of the insertion groove opening / closing plate (351) is restricted, the movement of the door sliding plate (340) is restricted, and accordingly, the opening of the distribution panel door (300) is restricted.

[0223] Referring to FIGS. 34a to 34c, we will examine releasing the door interlock function in a switchboard door opening restriction state as in FIG. 32.

[0224] Fig. 34a illustrates a case where the circuit breaker is in the test position or the operating position. The door interlock device (400) is activated, and the door interlock plate (490) is in a position where it is inserted into the door interlock plate insertion groove (311a). The movement of the insertion groove opening / closing plate (351) is restricted by the door interlock plate (490), so that the door lock pin (341) cannot be removed from the door lock pin insertion portion (120). Accordingly, the door handle portion (320) is not opened, and the opening of the distribution panel door (300) is restricted.

[0225] Figure 34b shows a state in which a user has pushed the door interlock plate (490) forward through the emergency opening hole (315). The door interlock rod (480) of the door interlock device (400) remains in place, but the door interlock plate (490) has moved rearward (left in the drawing) and is in a position pulled out from the door interlock plate insertion groove (311a). Therefore, the movement of the insertion groove opening / closing plate (351) is not restricted, allowing the door sliding plate (340) to move.

[0226] Figure 34c shows a state in which the door handle portion (320) is opened while the user has pushed out the door interlock plate (490). The insertion groove opening / closing plate (351) rises, the door lock pin (341) is released from the door lock pin insertion portion (120), and the door handle portion (320) is opened. Accordingly, the distribution panel door (300) can be opened, allowing access to the interior of the distribution panel even when the circuit breaker is inserted.

[0227] That is, in special cases, even in the test state or operating state of the circuit breaker (150), the user can push the door interlock plate (490) to release the door interlock function and open the distribution panel door (300).

[0228] Next, we will explain the state of closing a door that is temporarily open when the circuit breaker is in the incoming state.

[0229] Figure 34d shows the switchboard door (300) in an open state at the test position or operating position of the circuit breaker. To close the door, the door handle portion (320) is opened.

[0230] When the user closes the door by opening the door handle (320) after completing the inspection of the inside of the distribution panel while the circuit breaker is in the inlet state, the door interlock plate (490) is protruded toward the distribution panel door (300) as shown in the drawing, and the insertion groove opening / closing plate (351) is in a raised state. At this time, when the distribution panel door (300) is pushed closed, the insertion groove opening / closing plate (351) pushes out the door interlock plate (490). That is, the state of FIG. 34c is achieved. Thereafter, when the door handle (320) is released, the door handle (320) returns to the closed state, and the insertion groove opening / closing plate (351) descends. The door lock pin (341) is inserted into the door lock pin insertion portion (120), so that the distribution panel door (300) is locked to the distribution panel case (100). That is, the state of FIG. 34b is achieved.

[0231] At this time, as the insertion groove opening / closing plate (351) descends, the door interlock plate (490) is again protruded forward (toward the distribution panel door) by the door interlock plate return member (498) and inserted into the door interlock plate insertion groove (311a). Accordingly, the door interlock plate (490) returns to a state in which it restricts the movement of the insertion groove opening / closing plate (351) and thus restricts the opening of the distribution panel door (300). That is, the state of Fig. 34a is achieved.

[0232] According to the door interlock device of the distribution panel according to the present invention, in a situation where the opening of the distribution panel door is restricted by the door interlock device, the interlock function of the door interlock device can be selectively released to open the distribution panel door.

[0233] The user can easily release the interlock function of the door interlock device by pushing the door interlock plate backward through the emergency opening hole in the distribution panel door.

[0234] Accordingly, the door interlock device operates normally in normal times to protect workers, and in special cases such as maintenance, the interlock function of the door interlock device can be released to perform necessary work.

[0235] Additionally, if the door is opened while the circuit breaker is in operation, the door can be closed simply by opening the handle of the switchboard door without stopping the circuit breaker. In other words, the door can be closed in the same way as it would normally be closed. In this case, the door interlock function of the door interlock device is immediately restored without any additional action.

[0236] That is, the door can be opened regardless of the position of the circuit breaker or closed without changing the operating status of the circuit breaker.

[0237] The embodiments described above are illustrative of the best possible implementations of the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention. Therefore, these embodiments are not intended to limit the technical spirit of the present invention, but rather merely to illustrate it. Therefore, it should be understood that the scope of the technical spirit of the present invention is not limited by these embodiments. In other words, the scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included within the scope of the rights of the present invention.

[0238] [Explanation of symbols]

[0239] 100 distribution panel enclosure

[0240] 110 distribution board terminal

[0241] 120 Door lock pin insert

[0242] 150 circuit breaker

[0243] 151 Circuit breaker body

[0244] 160 circuit breaker entry rail

[0245] 170 Circuit Breaker Transfer Unit

[0246] 200 shutter assembly

[0247] 290 Shutter locking device

[0248] 300 distribution panel door

[0249] 310 door cover

[0250] 311 Door cover corner

[0251] 311a door interlock plate insertion groove

[0252] 320 door handle

[0253] 340 door sliding plate

[0254] 341 Door lock pin

[0255] 350 door interlock plate

[0256] 351 Insertion groove opening plate

[0257] 400 door interlock device

[0258] 470 interlocking plate

[0259] 471 Rotation axis

[0260] 472 First fastening member

[0261] 473 Plate Return Member

[0262] 474 Second fastening member

[0263] 480 Door Interlock Load

[0264] 481 connection

[0265] 483 Absence of guide

[0266] 482 Guide Absence Hole

[0267] 484 Road Return Absence

[0268] 485 Interlock guide absence

[0269] 486 Return member 1st mounting part

[0270] 490 Door Interlock Plate

[0271] 491 sliding joint

[0272] 492 extension

[0273] 492a locking part

[0274] 494 Return member 2nd attachment

[0275] 495 sliding hole

[0276] 498 Door Interlock Plate Return Element

Claims

1. Distribution panel door having a door interlock plate insertion groove; A door interlock device having a door interlock plate that restricts the opening of the switchboard door when inserted into the door interlock plate insertion groove and a door interlock rod in which the door interlock plate is combined and moves in conjunction with the insertion and withdrawal of the circuit breaker; The above door interlock plate is slidably connected to the above door interlock rod, In the disconnected position of the circuit breaker, the door interlock plate is spaced from the interlock plate insertion groove, A door interlock device of a distribution board, characterized in that, in the test position or operating position of the circuit breaker, the door interlock plate is inserted into the interlock plate insertion groove, and when the door interlock plate is pushed backward, the door interlock plate is pulled out from the door interlock plate insertion groove.

2. In paragraph 1, The above door interlock rod is provided with an interlock guide member that guides the movement of the door interlock plate, A door interlock device for a distribution panel, characterized in that a sliding hole is formed in the door interlock plate to which the interlock guide member is slidably coupled.

3. In paragraph 2, A door interlock device of a distribution panel, characterized in that the interlock guide member is composed of a pin or a bolt.

4. In paragraph 3, A door interlock device for a distribution panel, characterized in that a door interlock plate return member is provided between the door interlock rod and the door interlock plate.

5. In paragraph 4, The above door interlock load is provided with a first return member mounting portion on which one end of the door interlock plate return member is installed, A door interlock device for a distribution panel, characterized in that the door interlock plate is provided with a second return member mounting portion on which the other end of the door interlock plate return member is installed.

6. In paragraph 2, The above door interlock plate, A sliding joint slidably connected to the above interlock guide member, and A door interlock device for a distribution panel, characterized in that it includes an extension part extending in an “L” shape from the above sliding joint part.

7. In paragraph 6, A door interlock device for a distribution panel, characterized in that a locking portion is formed at the front end of the extension portion so as to extend forward and be insertable into the door interlock plate insertion groove.

8. In paragraph 7, A linkage plate is provided on one side to which the door interlock rod is connected, and rotates according to the movement of the above circuit breaker. A door interlock device of a distribution board, characterized in that when the circuit breaker is brought into the test position, the interlock plate rotates so that the door interlock rod moves along the length direction, and the locking part is inserted into the door interlock plate insertion groove.

9. In paragraph 1, A door interlock device for a distribution panel, characterized in that an emergency opening hole is formed in the distribution panel door to allow access to the door interlock plate.

10. In paragraph 1, A door interlock device for a distribution panel, characterized in that the distribution panel door is provided with an insertion groove opening / closing plate that opens and closes the door interlock plate insertion groove while moving up and down according to the operation of the door handle.

Images