Switchboard having compartment-interlocking door interlock device

Abstract

The present invention relates to a switchboard having a compartment-interlocking door interlock device and, more specifically, to a switchboard having a compartment-interlocking door interlock device, which restricts opening of a plurality of compartment doors when a circuit of a first compartment is connected in a switchboard having a plurality of compartments. In the switchboard having the compartment interlocking type door interlock device, according to the present invention, when the circuit of the first compartment is connected by the compartment-interlocking door interlock device, the opening of the doors of all compartments is restricted.

Description

Distribution board with compartment-linked door interlock device

[0001] The present invention relates to a switchboard having a compartment-linked door interlock device, and more particularly, to a switchboard having a compartment-linked door interlock device that restricts the opening of doors of a plurality of compartments when a circuit of a first compartment is connected in a switchboard having a plurality of compartments.

[0002] In general, a distribution panel is a device used to monitor, control, and protect a power system. A distribution panel houses and uses various power devices such as circuit breakers, current transformers, and instrument transformers to supply or control power and operate motors.

[0003] Among these power devices, the circuit breaker is the most crucial. Installed in certain parts of the power system, the circuit breaker switches the load or interrupts the circuit in the event of a fault such as a ground fault or short circuit.

[0004] In the operation of a circuit breaker, there is an operating position (Service position, Connected position) where the power terminal and load terminal of the circuit breaker body are connected to the power terminal and load terminal of the cradle (or the casing of the distribution panel) so that voltage and current are supplied, a test position (Test position) where the terminal of the circuit breaker body is separated from the terminal of the cradle so that only the operating status of the circuit breaker can be checked, and a disconnected position (Disonnected position) where the terminal of the circuit breaker body is completely separated from the terminal of the cradle.

[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] When moving the circuit breaker to each position in this manner, a safety device is provided to ensure that the circuit breaker can be inserted or removed while the switchboard door is closed for operator safety. Specifically, 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 or disconnected position.

[0007] Figure 1 shows an example of a distribution panel according to the prior art.

[0008] The distribution board shall be provided with multiple compartments to accommodate power devices according to their intended use, and each compartment shall have shielding and insulation performance as prescribed by law.

[0009] The plurality of compartments may include a circuit breaker room (1) where circuit breakers are stored, a cable room (2) where inlet / outlet booths or cables enter, a bus room (3) where bus lines pass, a transformer room (4) where instrument transformers are stored, and a low-voltage equipment room (5) where low-voltage equipment is stored.

[0010] At this time, it is common for the frames or fixed power components of each compartment to be connected to each other by bolts.

[0011] Power devices housed in the distribution board include a circuit breaker (6), an instrument transformer (7), an instrument current transformer (8), a busbar in a bus room (9), a busbar in a cable room (10), an instrument transformer busbar (11), a distribution board terminal (12) that is connected to the busbar and can be connected to a circuit breaker, a circuit breaker tulip-shaped terminal (13), and a drawer handle (14) for moving the circuit breaker body.

[0012] When the circuit breaker (6) is stored in the test position in the circuit breaker room (1) as shown in Fig. 1, voltage and current do not flow between the power source and the load.

[0013] If the circuit breaker (1) is brought into the operating position, current and voltage are supplied to the circuit, and the circuit breaker enables connection or interruption of current.

[0014] Here, the circuit breaker (1) is moved to the test position or the operating position by the pull-out handle (14).

[0015] When the instrument transformer (7) is stored in the test position of the transformer room (4) as shown in Fig. 1, it does not measure voltage, and when it is brought into the operating position, it can be connected to the distribution panel terminal (15) connected to the instrument transformer bus bar (11) to provide control power to the power devices.

[0016] At this time, the method of moving the instrument transformer (7) to the test position or operating position is the same as that of moving the circuit breaker.

[0017] However, as transformer capacities in high-voltage switchboards increased, the fuse and instrument transformer, previously manufactured as a single unit, became separate components. Consequently, it became difficult to accommodate the transformer room in a single compartment, leading to the development of a switchboard with a separate transformer panel. The transformer panel features one compartment for the fuses and another for the instrument transformer.

[0018] A transformer panel of this type is illustrated in FIGS. 2 and 3. FIGS. 2 and 3 are side views of an instrument transformer panel of a distribution board according to the prior art. FIG. 2 shows a state in which the fuse carriage of the first compartment is in the Off position, and FIG. 3 shows a state in which the fuse carriage of the first compartment is in the On position.

[0019] The transformer panel (50) is provided with a fuse compartment (51) and a control power transformer compartment (CPT compartment) (61) on the front side, and a bus bar (75) and a cable room (76) configured with a high voltage applied bus bar (75) on the rear side.

[0020] Here, the primary circuit is connected to the fuse room (51), and the primary circuit and the secondary circuit are connected to the instrument transformer room (61). In other words, in the fuse room (51), the high-voltage bus bar (75) and the primary bus bar (54) are connected or disconnected by the fuse carrier (55), and in the instrument transformer room (61), the current from the primary bus bar (54) is converted into secondary current by the instrument transformer (65), and the secondary current is connected to or disconnected as a load by the wiring circuit breaker (80).

[0021] A fuse truck (55) is installed in the fuse room (51) and can move forward and backward.

[0022] A fuse (56) is installed in the fuse carriage (55) between the high voltage bus bar (75) and the primary bus bar (54). The fuse (56) connects the high voltage bus bar (75) and the primary bus bar (54). When the fuse carriage (55) moves rearward, the fuse (56) is inserted, connecting the high voltage bus bar (75) and the primary bus bar (54) to conduct electricity to the circuit, and when the fuse carriage (55) moves forward, the fuse (56) is pulled out, disconnecting the connection between the high voltage bus bar (75) and the primary bus bar (54) to cut off the circuit.

[0023] A high voltage bus bar (75) is connected to the fuse room terminal (53). The high voltage bus bar (75) is positioned at the rear of the panel. The high voltage bus bar (75) is installed penetrating the bus room (71) or cable room (76). The high voltage bus bar (75) is positioned penetrating a plurality of adjacently arranged panels.

[0024] The fuse carrier (55) is provided with a first terminal (57) and a second terminal (58) that are respectively connected to both ends of the fuse (56). When the fuse carrier (55) is inserted, the first terminal (57) is connected to the high-voltage bus bar (75), and the second terminal (58) is connected to the primary bus bar (54).

[0025] An instrument transformer (65) is installed in the instrument transformer room (61) to convert the primary current into secondary current. The instrument transformer (65) converts the current flowing in the primary circuit from high voltage to low voltage and supplies power to devices (relays, measuring instruments, etc.) that use low voltage power.

[0026] A primary bus bar (62) is extended into the instrument transformer room (61). The primary bus bar (62) is connected to the primary coil of the instrument transformer (65).

[0027] A wiring circuit breaker (80) is connected to the secondary coil of an instrument transformer (65). A first terminal (power side terminal) (82) of the wiring circuit breaker (80) is connected to the secondary coil of the instrument transformer (65), and a second terminal (load side terminal) (83) of the wiring circuit breaker (80) is connected to a load. The wiring circuit breaker (80) supplies or blocks current flowing in the secondary circuit to an internal device requiring control power.

[0028] Meanwhile, a remote operation handle (90) is provided to remotely operate the wiring circuit breaker (80) from outside the instrument transformer room (61).

[0029] Figures 4 to 7 illustrate a conventional instrument transformer room (61) and a wiring circuit breaker (80). Figures 4 and 5 are perspective views of the second compartment in Figure 2. Figure 4 shows the door closed, and Figure 5 shows the door open.

[0030] Figures 6 and 7 show the operating states of the circuit breaker for wiring in Figure 5. Figure 6 is in the open state (Off), and Figure 7 is in the closed state (On).

[0031] A remote control handle (90) is provided on the outside of the door (64) of the instrument transformer room (61).

[0032] By pulling the remote lever (91) of the remote control handle (90), the switch lever (81) is operated through the control lever (86) installed on the circuit breaker (80) via a wire (93). In this way, the circuit breaker (80) can be turned on and off by the remote control handle (90).

[0033] An instrument transformer (65) and a wiring circuit breaker (80) are installed in the instrument transformer room (61), which is the lower compartment of the transformer panel (50). Care must be taken to prevent safety accidents from occurring when turning the wiring circuit breaker (80) on and off.

[0034] If maintenance is required, such as when a transformer is damaged or a fuse is blown due to an accident occurring during operation, the user can protect himself from danger by performing maintenance work with the fuse carrier (55) pulled out. At this time, the fuse carrier (55) must be pulled out while the secondary circuit is disconnected. Furthermore, if the instrument transformer room door (64) is opened arbitrarily while working, there is a risk of exposure to high voltage and other hazards, which could lead to an accident.

[0035] The basic operating sequence of the transformer panel (50) is as follows.

[0036] First, the operating sequence upon input is as follows.

[0037] Close the fuse room (51) door and the instrument transformer room (61) door.

[0038] Connect the primary circuit by bringing the fuse carrier (55) into the operating position.

[0039] Turn the switch of the wiring circuit breaker (80) to the on position to connect the secondary circuit.

[0040] Next, the driving sequence when opening is as follows.

[0041] Turn the switch of the wiring circuit breaker (80) to the off position to open the secondary circuit.

[0042] The fuse cartridge (55) is pulled out to the disconnected position to open the primary circuit.

[0043] Open the fuse room (51) door and the instrument transformer room (61) door.

[0044] Failure to follow this order may result in a safety hazard.

[0045] Therefore, in order to prevent a safety accident, it is not permitted to connect the primary circuit or secondary circuit while the door of the transformer panel (50) is open.

[0046] Meanwhile, it is possible to connect the secondary circuit without connecting the primary circuit while each compartment door of the transformer panel (50) is closed. This case corresponds to the test mode.

[0047] Additionally, it is not permitted to connect the primary circuit, which is the high voltage circuit, while the secondary circuit is connected, i.e., the low voltage circuit and the load are connected.

[0048] Additionally, opening the door while the primary or secondary circuit is connected is not permitted.

[0049] Also, it is not permitted to disconnect the primary circuit while the secondary circuit is connected.

[0050] These matters are also stipulated in laws.

[0051] Interlock devices are necessary to comply with these regulations and protect drivers.

[0052] As previously mentioned, connecting or disconnecting the primary or secondary circuits while the compartment door is open must be avoided due to the risk of arc current-induced accidents. In other words, connecting or disconnecting the primary or secondary circuits is only permitted while the compartment door is closed.

[0053] However, in a case where the transformer panel (50) is provided separately as above and the fuse room (51) and the instrument transformer room (61) are separated, an interlock structure is not provided to prevent the opening of the compartment doors of both compartments when the primary circuit is connected.

[0054] Therefore, a door interlock device is required that links the first and second compartments.

[0055] 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.”

[0056] The present invention has been devised to solve the above-mentioned problem, and its purpose is to provide a switchboard having a compartment-linked door interlock device that restricts the opening of multiple compartment doors when a circuit of a first compartment is connected in a switchboard having multiple compartments.

[0057] A distribution board having a compartment-linked door interlock device according to one embodiment of the present invention comprises: a first compartment in which a power device connecting a primary circuit is arranged; a second compartment adjacent to the first compartment and to which a secondary circuit is connected; a first interlock rod installed in the first compartment to move forward and backward and moves in an opposite direction according to the forward and backward movement of the power device to restrain or allow opening of the first compartment door; a second interlock rod installed in the second compartment to move forward and backward and restrain or allow opening of the second compartment door; and a connecting member connecting the first interlock rod and the second interlock rod so as to move in the same direction.

[0058] Here, the connecting member includes a fixed connecting rod that fixedly connects the first interlock load and the second interlock load.

[0059] In addition, the connecting member further includes a first gripper member having one end rotatably connected to the first interlock rod; and a second gripper member having one end rotatably connected to the second interlock rod and the other end rotatably connected to the other end of the first gripper member, wherein the first gripper member and the second gripper member rotate in opposite directions.

[0060] Additionally, a torsion spring is provided at the portion where the first and second clamp leg members are combined.

[0061] In addition, the connecting member includes a first rotation link that is rotatably installed in the first compartment and has one end connected to the first interlock rod; a second rotation link that is rotatably installed in the second compartment and has one end connected to the second interlock rod; and an intermediate link that is connected between the other end of the first rotation link and the other end of the second rotation link.

[0062] In addition, the first rotation link is formed by extending a first link first arm portion to which the first interlock rod is connected and a first link second arm portion connected to one end of the intermediate link, which are extended at a predetermined angle from each other, and the second rotation link is formed by extending a second link first arm portion to which the second interlock rod is connected and a second link second arm portion connected to the other end of the intermediate link, which are extended at a predetermined angle from each other.

[0063] Additionally, a hole is formed in the first arm portion of the first link and the first arm portion of the second link.

[0064] Additionally, a first return spring is provided between the first arm portion of the first link and the first interlock rod, and a second return spring is provided between the first arm portion of the second link and the second interlock rod.

[0065] Additionally, the intermediate link includes a first intermediate link having one end connected to the first interlock load; and a second intermediate link having one end connected to the second interlock load and the other end connected to the other end of the first intermediate link.

[0066] Additionally, the first intermediate link and the second intermediate link are arranged to have a predetermined angle with each other.

[0067] Additionally, the first rotation link and the second rotation link are arranged on opposite sides with respect to the longitudinal direction of the intermediate link.

[0068] Additionally, the first rotation link is disposed below the first interlock rod, and the second rotation link is disposed above the second interlock rod.

[0069] Additionally, a door interlock mechanism is installed in the first compartment to transmit force to the first interlock rod by making contact when the power device moves.

[0070] And, a first interlock bracket to which the first rotation link is rotatably connected is installed in the first compartment, and a second interlock bracket to which the second rotation link is rotatably connected is installed in the second compartment.

[0071] According to a distribution board having a compartment-linked door interlock device according to the present invention, when the circuit of the first compartment is connected by the compartment-linked door interlock device, the opening of the doors of all compartments is restricted.

[0072] When the power device in the first compartment is brought into the operating position, the first interlock rod moves to a position where it restricts the opening of the first compartment door. At this time, the first interlock rod that restricts the opening of the first compartment door and the second interlock rod that restricts the opening of the second compartment door operate simultaneously through a connecting mechanism, so that when the power device in the first compartment is connected, the opening of not only the first compartment door but also the second compartment door is automatically restricted.

[0073] Therefore, it protects users from arc currents caused by the separation of the primary circuit, etc. and satisfies regulations.

[0074] Figure 1 is a side view of a multi-stage distribution panel according to the prior art.

[0075] Figures 2 and 3 are side views of an instrument transformer panel of a distribution board according to the prior art. Figure 2 shows a state in which the fuse carriage of the first compartment is in the Off position, and Figure 3 shows a state in which the fuse carriage of the first compartment is in the On position.

[0076] Figures 4 and 5 are perspective views of the second compartment in Figure 2. Figure 3 shows the door closed, and Figure 4 shows the door open.

[0077] Figures 6 and 7 show the operating states of the circuit breaker for wiring in Figure 5. Figure 6 is in the open state (Off), and Figure 7 is in the closed state (On).

[0078] Figures 8 to 28 are drawings of a distribution panel according to each embodiment of the present invention.

[0079] Here, FIG. 8 is a perspective view of a transformer panel for a distribution panel according to one embodiment of the present invention.

[0080] Figures 9 and 10 are side views of Figure 8. Only the fuse carriage compartment and the instrument transformer compartment are shown. Figure 9 shows the fuse carriage in the extended state (primary circuit open state), and Figure 10 shows the fuse carriage in the inserted state (primary circuit closed state).

[0081] Figure 11 is an internal perspective view of the instrument transformer panel, with the door removed.

[0082] Figures 12 and 13 are detailed views of a portion of the compartment-linked door interlock device in Figures 9 and 10. Figure 12 shows the open state of the compartment-linked door interlock device, and Figure 13 shows the restrained state of the compartment-linked door interlock device.

[0083] Figure 14 is a rear perspective view of the first compartment door of the instrument transformer panel.

[0084] Figure 15 is a rear perspective view of the second compartment door of the instrument transformer panel.

[0085] Fig. 16 is a perspective view of a compartment-linked door interlock device according to one embodiment of the present invention.

[0086] Figures 17 to 21 are operational diagrams of the transformer panel.

[0087] Here, Figs. 17 and 18 show the fuse carriage in a disconnected state, and Fig. 19 shows the fuse carriage in a connected state. Here, Fig. 17 shows the compartment door handle in a lowered state, and Fig. 18 shows the compartment door handle in a raised state.

[0088] Fig. 20 is a plan view corresponding to Fig. 17, and Fig. 21 is a plan view corresponding to Fig. 18.

[0089] Figures 22 to 25 are partial detailed drawings of the operation of the transformer panel.

[0090] Fig. 22 is a partial perspective view of the first compartment corresponding to Fig. 17, and Fig. 23 is a partial perspective view of the first compartment corresponding to Fig. 19.

[0091] Fig. 24 is a partial perspective view of the second compartment corresponding to Fig. 17, and Fig. 25 is a partial perspective view of the second compartment corresponding to Fig. 19.

[0092] Figures 26 to 28 are perspective views of a compartment-linked door interlock device according to another embodiment of the present invention.

[0093] 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.

[0094] 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.

[0095] Fig. 8 is a perspective view of a distribution panel instrument transformer panel according to an embodiment of the present invention, Figs. 9 and 10 are side views of Fig. 8, wherein Fig. 9 shows a fuse carrier pulled out state (primary circuit open state) and Fig. 10 shows a fuse carrier inserted state (primary circuit closed state). Fig. 11 is an internal perspective view of the distribution panel instrument transformer panel with the door removed. Figs. 12 and 13 are partial detailed views of Figs. 9 and 10. Referring to the drawings, a distribution panel having a compartment-linked door interlock device according to each embodiment of the present invention will be described in detail.

[0096] A distribution board having a compartment-linked door interlock device according to one embodiment of the present invention comprises: a first compartment (110) in which a first power device (500) connecting a primary circuit is arranged; a second compartment (210) disposed adjacent to the first compartment (110) and to which a secondary circuit is connected; a first interlock rod (410) installed in the first compartment (110) to move forward and backward and moves in an opposite direction according to the forward and backward movement of the first power device (500) to restrain or allow opening of the first compartment door (150); a second interlock rod (420) installed in the second compartment (210) to move forward and backward and restrain or allow opening of the second compartment door (250); and a connecting member (430, 440, 450, 460) connecting the first interlock rod (410) and the second interlock rod (420) so as to move in the same direction as each other.

[0097] A distribution panel according to one embodiment of the present invention may include a circuit breaker panel, a feed panel, a transformer panel, etc. In the present invention, a description will be mainly given of a transformer panel (100) forming part of the distribution panel.

[0098] The transformer panel (100) may be formed as a rectangular box structure. The transformer panel (100) is divided into several compartments. For example, the transformer panel may be divided into a first compartment (110) and a second compartment (210) located at the front, and a bus room (310) and a cable room (360) located at the rear.

[0099] The first compartment (110) and the second compartment (210) can be stacked in two stages. In this case, the compartment located on the upper side is referred to as the first compartment (110), and the compartment located on the lower side is referred to as the second compartment (210). Here, a case will be described where the first compartment (110) is used as a compartment for accommodating the first power device (fuse dummy), and the second compartment (210) is used as a compartment for accommodating the second power device (instrument transformer).

[0100] A first power device (fuse fuse) (500) is installed in the first compartment (110), and a second power device (instrument transformer) (600) is installed in the second compartment (210). Based on voltage, high voltage is applied to the first compartment (110), and low voltage is generated in the second compartment (210).

[0101] Here, the first power device is a device that switches the high-voltage circuit (primary circuit), and since a fuse carrier is mainly used, the term "fuse carrier" will be primarily used in the following description. Furthermore, the second power device is a device that is connected to the high-voltage circuit and generates low-voltage, and since an instrument transformer is mainly used, the term "instrument transformer" will be primarily used in the following description.

[0102] The first compartment (110) is manufactured to accommodate a fuse carrier (500), which is a first power device. The fuse carrier (500) moves within the first compartment (110) to a disconnected position (see FIG. 9), a test position, and a connected position (see FIG. 10). Here, the test position is a state in which the primary power is not connected and only the secondary power is connected (the wiring circuit breaker in the second compartment is turned on).

[0103] A first compartment door (150) is provided on the front of the first compartment (110). The first compartment door (150) is hingedly connected to one corner of the first compartment (110) and rotates in the form of a swing door to open and close the first compartment (110). The first compartment door (150) will be described in detail later.

[0104] A through hole (not shown) is formed in the bottom panel (112) of the first compartment (110) into which a second intermediate link (460) among the connecting members (430, 440, 450, 460) of the compartment-linked interlock device (400) can be inserted.

[0105] A first rod insertion hole (115) into which a first interlock rod (410) can be inserted is formed in the shape of the letter ‘ㄱ’ on the front side of the side panel (114) of the first compartment (110).

[0106] A plurality of first compartment sliding plate restraints (118) are provided on the front side of the side panel (114) of the first compartment (110). When the first compartment door sliding plate (165) is inserted into the restraint hole (119) of the first compartment sliding plate restraint (118), the opening of the first compartment door (150) is restrained.

[0107] The fuse carrier (500) has a first terminal (510) connected to the first compartment first terminal (120) and a second terminal (520) connected to the first compartment second terminal (125).

[0108] Inside the first compartment (110), a first compartment terminal (120, 125), a first compartment rail section (130), a shutter assembly (140), a transport device section (180), etc. are provided.

[0109] The first compartment terminal (120, 125) is composed of a first compartment first terminal (120) connected to a mother room (310) having a high voltage section and a first compartment second terminal (125) connected to a second compartment (210) that generates a low voltage.

[0110] The first compartment first terminal (120) is installed at the rear of the first compartment (110) and connects the first terminal (510) of the fuse carriage (500) and the high voltage section of the bus box (310). Here, the high voltage section includes a high voltage bus bar (320).

[0111] The first compartment second terminal (125) is installed on the lower surface of the first compartment (110) and connects the second terminal (520) of the fuse carrier (500) and the second compartment terminal (225) of the second compartment (210). At this time, the first compartment second terminal (125) includes an upwardly extending extension bus bar (126), and the second terminal (520) is connected to the extension bus bar (126). In addition, the second compartment terminal (225) includes a second compartment bus bar (227), and the second compartment bus bar (227) is connected to an instrument transformer (600).

[0112] The first compartment's first terminal (120) is connected to the high-voltage bus bar (320) of the mother room (310). Accordingly, the first compartment (110) is equipped with a fuse carrier (500) to transmit or block high-voltage current.

[0113] Specifically, when the fuse carriage (500) is moved to the rear of the first compartment (110), i.e., the operating position (connected position, service position), the first terminal (510) of the fuse carriage (500) is connected to the first terminal (120) of the first compartment and receives current from the power source through the high-voltage bus bar (320).

[0114] In addition, when the fuse carriage (500) is moved to the front of the first compartment (110), i.e., the test position or the disconnected position, the first terminal (510) of the fuse carriage (500) is separated from the first terminal (120) of the first compartment, so that the current supply through the high voltage bus bar (320) is cut off.

[0115] A fuse (530) is provided between the first terminal (510) and the second terminal (520) of the fuse carrier (500). The fuse (530) connects the first terminal (510) and the second terminal (520) to allow current to flow, and when an overcurrent flows in the circuit, it blows and cuts off the circuit. The fuse (530) is a disposable consumable component, and once it blows, the fuse (530) must be replaced. This is a difference from the trip mechanism of a general circuit breaker.

[0116] A fuse cart transporter (540) is provided at the bottom of the fuse cart (500). The transporter is commonly referred to as a truck. The fuse cart transporter (540) is provided with transport wheels (545) on both sides of the cart frame (542) so as to move along the first compartment rail section (130). The fuse cart transporter (540) is connected to the transport device section (180) of the first compartment (110) and moves forward and backward to move the fuse cart (500).

[0117] A transfer device (180) is provided on the bottom surface of the first compartment (110). The transfer device (180) provides power to move the fuse cart (500). The transfer device (180) converts the rotational force of the screw handle into linear motion to move the fuse cart (500) in the forward and backward directions.

[0118] In the transport device (180), a lead screw (183) is arranged in the forward and backward direction. The lead screw (183) is formed in the shape of a circular rod and has threads formed along the outer surface, so that when it rotates, a member connected to the threads moves forward or backward. The fuse carriage transport unit (540) is connected to the member that moves forward and backward and moves, and thus the fuse carriage (500) also moves forward and backward.

[0119] A pull-out handle insertion port (182) is provided on the front of the transport device (180). A pull-out handle (not shown) is provided to rotate the lead screw (183), and the pull-out handle is coupled to the lead screw (183) through the pull-out handle insertion port (182) through which the front end of the lead screw (183) is exposed.

[0120] In order to access the insertion / withdrawal handle insertion port (182) of the transport device (180), a first compartment door (150) is provided with a first compartment handle insertion port (170). That is, a user can insert the insertion / withdrawal handle into the first compartment handle insertion port (170) and the insertion / withdrawal handle insertion port (182) with the first compartment door (150) closed, fit it into the lead screw (183), and perform an insertion / withdrawal movement operation for the fuse carriage (500).

[0121] A first compartment rail section (130) is provided on both sides of the first compartment (110). The first compartment rail section (130) can guide the transport wheel (545) of the fuse cart transport section (540) during the process of the fuse cart (500) being moved by the transport device section (180) and the fuse cart transport section (540). The transport wheel (545) moves along the rail (131) of the first compartment rail section (130).

[0122] A shutter assembly (140) is provided inside the first compartment (110) to cover the first compartment first terminal (120). The shutter assembly (140) prevents safety accidents by covering the first compartment first terminal (120) when the fuse carriage (500) is in the disconnected position, and opens the first compartment first terminal (120) when the fuse carriage (500) is in the connected position so that the first terminal (510) can be connected to the first compartment first terminal (120).

[0123] The shutter assembly (140) includes a shutter drive lever (141), a link rod (142, 144), a shutter lever (143, 145), and a shutter plate (147).

[0124] When the fuse cart transport unit (540) enters the connected position and the transport wheel (545) presses the shutter drive lever (141), the link rods (142, 144) connected thereto are lowered, respectively, so that the shutter levers (143, 145) rotate around their respective rotation axes to raise or lower the shutter plate (147). Accordingly, the shutter plate (147) covering the first terminal (120) of the first compartment is opened, so that the first terminal (520) can be connected.

[0125] A second compartment (210) is provided. An instrument transformer (600), which is a second power device, is installed in the second compartment (210).

[0126] A second compartment door (250) is provided on the front of the second compartment (210). The second compartment door (250) is hingedly connected to one corner of the second compartment (210) and rotates in the form of a swing door to open and close the second compartment (210). The second compartment door (250) will be described in detail later.

[0127] A second rod insertion hole (215) into which a second interlock rod (420) can be inserted is formed in the shape of the letter ‘ㄱ’ on the front side of the side panel (214) of the second compartment (210).

[0128] A plurality of second compartment sliding plate restraints (218) are provided on the front side of the side panel (214) of the second compartment (210). When the second compartment door sliding plate (265) is inserted into the restraint hole (219) of the second compartment sliding plate restraint (218), the opening of the second compartment door (250) is restrained.

[0129] The second compartment (210) is constructed to accommodate an instrument transformer (600). The instrument transformer (600) is moved within the second compartment (210) on a transformer cart (240).

[0130] An instrument transformer (600) includes an iron core (620) and a coil (610).

[0131] The core (620) has a 'ㅁ' shape that wraps around the coil (610), and extends in the middle to penetrate the inside of the coil (610). The core (620) forms a magnetic path.

[0132] The coil (610) has a primary coil on the outside and a secondary coil on the inside.

[0133] A primary terminal (612) is provided on the outside of the coil (610), and a secondary terminal (not shown) is provided on the inside of the coil. The secondary terminal is connected to the first terminal (power side terminal) of the wiring circuit breaker (650).

[0134] Inside the second compartment (210), a second compartment terminal (225), a second compartment rail section (230), a transformer transfer section (240), an instrument transformer (600), etc. can be placed.

[0135] The second compartment terminal (225) is installed on the upper surface of the second compartment (210). The second compartment terminal (225) is connected to the first compartment second terminal (125). The second compartment terminal (225) and the first compartment second terminal (125) may be formed integrally.

[0136] The second compartment terminal (225) is connected to the second compartment bus bar (227). Current from the high voltage section of the bus box (310) flows through the fuse (530) of the first compartment (110) to the second compartment bus bar (227).

[0137] The second compartment bus bar (227) is connected to the second compartment terminal (225) on one side and to the primary terminal (612) of the instrument transformer (600) on the other side. For this purpose, the second compartment bus bar (227) is appropriately extended and bent.

[0138] The current entering through the second compartment terminal (225) enters the instrument transformer (600) through the second compartment bus bar (227) and the primary terminal (612), is converted into low voltage current, and enters the wiring circuit breaker (650) through the secondary terminal.

[0139] When an instrument transformer (600) is installed inside the second compartment (210) and the primary terminal (612) is connected to the second compartment bus bar (227), current is supplied from the power source through the high voltage bus bar (320) and the fuse (530).

[0140] Additionally, when the instrument transformer (600) is withdrawn from the second compartment (210), the current supply through the high voltage busbar and fuse (530) is cut off.

[0141] A transformer transfer unit (240) is provided at the bottom of the instrument transformer (600). The transfer unit is commonly referred to as a truck. The transformer transfer unit (240) is provided with transfer wheels (244, 245) on a cart frame (242). The transformer transfer unit (240) may include a first transfer wheel (244) that moves along the bottom surface of the second compartment (210) and a second transfer wheel (245) that moves along the second compartment rail (230).

[0142] A second compartment rail section (230) is provided on both sides of the second compartment (210). The second compartment rail section (230) can guide the second transport wheel (245) of the transformer transport section (240) during the process of moving the instrument transformer (600) by the transformer transport section (240). The second transport wheel (245) moves along the second compartment rail section (230).

[0143] An instrument transformer (600) is installed in the second compartment (210), and the instrument transformer (600) converts the high voltage of the current entering through the second compartment bus bar (227) into a low voltage and supplies it to the load through the wiring circuit breaker (650). This forms a secondary circuit through which a low voltage current flows.

[0144] A high voltage section is provided in the busbar (310). The high voltage section includes a high voltage busbar (320). The high voltage busbar (320) is connected to the busbar on one side and to the first terminal (120) of the first compartment on the other side, and receives current from the power supply and supplies it to the first compartment (110) (primary circuit).

[0145] In the cable room (360), the high voltage section can be extended and necessary cables can be installed.

[0146] The doors (150, 250) of each compartment will be described in detail. First, the first compartment door (150) will be described. Additional reference will be made to the rear perspective view of the first compartment door (150) illustrated in FIG. 14.

[0147] The first compartment door (150) is positioned at the front of the first compartment (110). The first compartment door (150) is positioned to cover the first compartment (110).

[0148] The first compartment door (150) is provided with a first compartment handle insertion port (170) into which an insertion / withdrawal handle can be inserted. The first compartment handle insertion port (170) is installed through the lower portion of the first compartment door (150).

[0149] The first compartment door (150) is installed so that one side is fixed to the first compartment (110) and the other side rotates to open and close the first compartment (110). That is, the first compartment door (150) is configured with a hinge so that it can be opened and closed in a hinged manner. A first compartment door handle (156) is arranged on the opposite side of the first compartment door (150) where the hinge (162) is installed. The user opens or closes the door handle (156) to open or close the first compartment door (150) with respect to the first compartment (110).

[0150] The first compartment door (150) includes a first compartment door panel (151), a first compartment door handle (156), a first compartment door side plate (160), and a first compartment door sliding plate (165).

[0151] The first compartment door panel (151) is formed in a size that can cover the front of the first compartment (110). The first compartment door panel (151) is formed as a rectangular plate, and each side (upper, lower, left, and right ends) of the first compartment door panel (151) is bent rearward to form each side portion (152) of the first compartment door. In addition, the side portion of the first compartment door panel (151) where the first compartment door handle portion (156) is provided is bent inward to form a first compartment door overlapping surface portion (153) that is parallel to the first compartment door panel (151). Accordingly, a space is formed in the side portion where the first compartment door handle portion (156) is provided, surrounded by the first compartment door panel (151), the first compartment door side portion (152), and the first compartment door overlapping surface portion (153), and a first compartment door sliding plate (165), etc., is installed in this space.

[0152] A first compartment door overlapping surface (153) is formed with a first compartment door restraint insertion hole (154) into which a first compartment sliding plate restraint (118) can be inserted. When the first compartment door (150) is closed, the first compartment sliding plate restraint (118) is inserted and positioned in the first compartment door restraint insertion hole (154), and when the first compartment door catch (168) of the first compartment door sliding plate (165) is inserted into the restraint hole (119) of the first compartment sliding plate restraint (118), the first compartment door (150) is restrained and its opening is restricted. Here, as described above, the first compartment sliding plate restraint (118) illustrated in FIG. 14 is not a component of the first compartment door (150), but is fixedly installed on the front of the first compartment side panel (114) as illustrated in FIG. 11.

[0153] A first interlock rod insertion groove (155) into which a first interlock rod (410) can be inserted is formed in the first compartment door overlapping surface (153). The first interlock rod (410) inserted into the interlock rod insertion groove (155) restricts the movement of the first compartment door interlock member (169) coupled to the first compartment door sliding plate (165), and consequently, the movement of the first compartment door sliding plate (165) is restricted, thereby preventing the opening of the first compartment door (150). Here, the first interlock rod insertion groove (155) may be formed in an 'ㄱ' shape in cross section.

[0154] A first compartment door side plate (160) is provided on the opposite side of the first compartment door (150) from the side where the first compartment door handle (156) is provided. A hinge (162) is provided on the door side plate (160). The first compartment door (150) is opened and closed by rotating around the hinge (162). Here, a plurality of hinges (162) may be provided and spaced apart from each other.

[0155] The first compartment door handle (156) includes a first compartment door handle (157). The first compartment door handle (157) operates the first compartment door sliding plate (165) via a connecting lever (not shown). That is, as the first compartment door handle (157) is opened and closed, the first compartment door sliding plate (165) moves up and down with respect to the first compartment door panel (151). (The process of the first compartment door sliding plate (165) moving up and down as the first compartment door handle (157) is opened and closed can be seen in FIGS. 17 and 18.)

[0156] The first compartment door (150) further includes a first compartment door sliding plate (165) that moves up and down in conjunction with the opening and closing operation of the first compartment door handle (156).

[0157] The first compartment door sliding plate (165) is provided with a first compartment door lever operating part (166) that is connected to the first compartment door handle (157) by a connecting lever.

[0158] A first compartment door insertion groove (167) is formed as a groove in the first compartment door sliding plate (165), and a first compartment door catch (168) is formed in a protruding manner in the first compartment door insertion groove (167). When the first compartment door catch (168) is inserted into the catch hole (119) of the first compartment sliding plate catch (118), the opening of the first compartment door (150) is restricted.

[0159] The first compartment door sliding plate (165) is provided with a first compartment door interlock member (169) that is caught by a first interlock rod (410). The first compartment door interlock member (169) can be coupled in a direction perpendicular to the first compartment door sliding plate (165). If the first interlock rod (410) does not restrain the first compartment door interlock member (169), the first compartment door sliding plate (165) can move up and down freely, and if the first interlock rod (410) restrains the first compartment door interlock member (169), the first compartment door sliding plate (165) is restricted from moving up and down, so that the opening of the first compartment door (150) is restricted.

[0160] Next, the second compartment door (250) will be described in detail. Refer to the rear perspective view of the second compartment door (250) illustrated in Fig. 15.

[0161] The second compartment door (250) is positioned at the front of the second compartment (210). The second compartment door (250) is positioned to cover the second compartment (210).

[0162] The second compartment door (250) is installed so that one side is fixed to the second compartment (210) and the other side rotates to open and close the second compartment (210). That is, the second compartment door (250) is configured with a hinge so that it can be opened and closed in a hinged manner. A second compartment door handle (256) is arranged on the opposite side of the part of the second compartment door (250) where the hinge (262) is installed. The user opens or closes the door handle (256) to open or close the second compartment door (250) with respect to the second compartment (210).

[0163] The second compartment door (250) includes a second compartment door panel (251), a second compartment door handle (256), a second compartment door side plate (260), and a second compartment door sliding plate (265).

[0164] The second compartment door panel (251) is formed in a size that can cover the front of the second compartment (210). The second compartment door panel (251) is formed as a rectangular plate, and each side (upper, lower, left, and right ends) of the second compartment door panel (251) is bent rearward to form a second compartment door side portion (252). In addition, the side portion of the second compartment door panel (251) where the second compartment door handle portion (256) is provided is bent inward to form a second compartment door overlapping surface portion (253) that is parallel to the second compartment door panel (251). Accordingly, a space is formed in the side portion where the second compartment door handle portion (256) is provided, surrounded by the second compartment door panel (251), the second compartment door side portion (252), and the second compartment door overlapping surface portion (253), and a second compartment door sliding plate (265), etc., is installed in this space.

[0165] A second compartment door restraint insertion hole (254) into which a second compartment sliding plate restraint (218) can be inserted is formed in the second compartment door overlapping surface (253). When the second compartment door (250) is closed, the second compartment sliding plate restraint (218) is inserted and positioned in the second compartment door restraint insertion hole (254), and when the second compartment door catch (268) of the second compartment door sliding plate (265) is inserted into the restraint hole (219) of the second compartment sliding plate restraint (218), the second compartment door (250) is restrained and its opening is restricted. Here, as described above, the second compartment sliding plate restraint (218) illustrated in FIG. 15 is not a component of the second compartment door (250), but is fixedly installed on the front of the second compartment side panel (214) as illustrated in FIG. 11.

[0166] A second interlock rod insertion groove (255) into which a second interlock rod (420) can be inserted is formed in the second compartment door overlapping surface (253). The second interlock rod (420) inserted into the interlock rod insertion groove (255) restricts the movement of the second compartment door interlock member (269) coupled to the second compartment door sliding plate (265), and consequently, the movement of the second compartment door sliding plate (265) is restricted, thereby restricting the opening of the second compartment door (250). Here, the second interlock rod insertion groove (255) may be formed in an 'ㄱ' shape in cross section.

[0167] A second compartment door side plate (260) is provided on the opposite side of the second compartment door (250) from the side where the second compartment door handle (256) is provided. A hinge (262) is provided on the door side plate (260). The second compartment door (250) is opened and closed by rotating around the hinge (262). Here, a plurality of hinges (262) may be provided and spaced apart from each other.

[0168] The second compartment door handle (256) includes a second compartment door handle (257). The second compartment door handle (257) operates the second compartment door sliding plate (265) via a connecting lever (not shown). That is, as the second compartment door handle (257) is opened and closed, the second compartment door sliding plate (265) moves up and down relative to the second compartment door panel (251). (The operation of the second compartment door sliding plate (265) moving up and down as the second compartment door handle (257) is opened and closed can be seen with reference to FIGS. 17 and 18.)

[0169] The second compartment door (250) further includes a second compartment door sliding plate (265) that moves up and down in conjunction with the opening and closing operation of the second compartment door handle (256).

[0170] The second compartment door sliding plate (265) is provided with a second compartment door lever operating portion (266) that is connected to the second compartment door handle (257) by a connecting lever.

[0171] A second compartment door insertion groove (267) is formed as a groove in the second compartment door sliding plate (265), and a second compartment door catch (268) is formed in a protruding manner in the second compartment door insertion groove (267). When the second compartment door catch (268) is inserted into the catch hole (219) of the second compartment sliding plate catch (218), the opening of the second compartment door (250) is restricted.

[0172] The second compartment door sliding plate (265) is provided with a second compartment door interlock member (269) that is caught by a second interlock rod (420). The second compartment door interlock member (269) can be coupled in a direction perpendicular to the second compartment door sliding plate (265). If the second interlock rod (420) does not restrain the second compartment door interlock member (269), the second compartment door sliding plate (265) can move up and down freely, and if the second interlock rod (420) restrains the second compartment door interlock member (269), the second compartment door sliding plate (265) is restricted from moving up and down, so that the opening of the second compartment door (250) is restricted.

[0173] A compartment-linked door interlock device (400) according to one embodiment of the present invention will be described. The compartment-linked door interlock device (400) is provided to restrict the opening of both the first compartment door (150) of the first compartment (110) and the second compartment door (250) of the second compartment (210) when the fuse carriage (500) of the first compartment (110) moves to the connected position and the primary circuit is connected.

[0174] Fig. 16 is a perspective view of a compartment-linked door interlock device according to one embodiment of the present invention. Figs. 17 to 21 are operation diagrams of a transformer panel, wherein Figs. 17 and 18 show a state in which a fuse carriage is disconnected, and Fig. 19 shows a state in which the fuse carriage is connected. Here, Fig. 17 shows a state in which a compartment door handle is lowered, and Fig. 18 shows a state in which the compartment door handle is raised. Fig. 20 is a plan view corresponding to Fig. 17, and Fig. 21 is a plan view corresponding to Fig. 18. Figs. 22 to 25 are partial detailed views of operation diagrams of a transformer panel, wherein Fig. 22 is a partial perspective view of a first compartment corresponding to Fig. 17, and Fig. 23 is a partial perspective view of a first compartment corresponding to Fig. 19. Fig. 24 is a partial perspective view of the second compartment corresponding to Fig. 17, and Fig. 25 is a partial perspective view of the second compartment corresponding to Fig. 19.

[0175] The first compartment (110) is provided with a first door interlock rod (410) to restrict the opening of the first compartment door (150) when the fuse carriage (500) is inserted. When the fuse carriage (500) moves to the connected position, the first door interlock rod (410) moves forward by the door interlock operating member (470) to restrict the first compartment door sliding plate (165) and restrict the opening of the first compartment door handle (156).

[0176] In addition, the second compartment (210) is provided with a second door interlock rod (420) to restrict the opening of the second compartment door (250) when the fuse carriage (500) is inserted. When the fuse carriage (500) moves to the connected position, the second interlock rod (420) connected to the first door interlock rod (410) by the connecting mechanism moves forward to restrict the second compartment door sliding plate (265) and restrict the opening of the second compartment door handle (256).

[0177] Since the transformer panel (100) is divided into a first compartment (110) that accommodates a first power device that connects a primary circuit and a second compartment (210) that accommodates a second power device that connects a secondary circuit, both the first compartment door (150) and the second compartment door (250) must be restricted from opening when the primary circuit is connected for user protection.

[0178] A compartment-linked door interlock device (400) is provided to simultaneously lock or unlock the first compartment door (150) and the second compartment door (250). That is, the compartment-linked door interlock device (400) is provided to prevent the first compartment door (150) and the second compartment door (250) of the transformer panel (100) from being opened.

[0179] A compartment-linked door interlock device (400) includes a first interlock rod (410) slidably installed in a first compartment (110), a second interlock rod (420) slidably installed in a second compartment (210), and a connecting member (connecting mechanism) (430, 440, 450, 460; 1410; 1430, 1440; 1450, 1460, 1470) that connects the first interlock rod (410) and the second interlock rod (420) to operate them together.

[0180] The first interlock rod (410) is arranged in the front-back direction inside the first compartment (110). The first interlock rod (410) is installed so as to be slidable adjacent to one of the first compartment side panels (114) of the first compartment (110). To this end, the first interlock rod (410) has a plurality of first sliding holes (411) formed in the front-back direction, and a first guide member (412) is inserted into the first sliding holes (411) and fixed to the first compartment side panel (114). The first interlock rod (410) is slidable in the front-back direction along the first guide member (412). Here, the first guide member (412) may be configured as a pin or a bolt, etc.

[0181] A door interlock action member connecting portion (415) is protrudingly formed on the first interlock rod (410). One end (472) of the door interlock action member (470) is slidably and rotatably connected to the door interlock action member connecting portion (415) by a fastening member. Accordingly, when the door interlock action member (470) rotates, the first interlock rod (410) connected to one end of the door interlock action member (470) moves forward or backward.

[0182] The door interlock mechanism (470) is rotatably installed on the first compartment rail portion (130). The door interlock mechanism (470) is rotatably installed on the first compartment rail portion (130) by an operation shaft (471). A fastening hole (474) is formed at one end (472) of the door interlock mechanism (470) and is slidably and rotatably connected to the door interlock mechanism connection portion (415) of the first interlock rod (410) by a fastening member (475). Here, the fastening hole (474) is formed as a long hole so that the fastening member (475) can slide relatively.

[0183] When the other end (473) of the door interlock operating member (470) is pushed and moved by the fuse carriage (500), the door interlock operating member (470) rotates based on the operating axis (471), and accordingly, one end (472) of the door interlock operating member (470) also rotates to move the first interlock rod (410) forward or backward.

[0184] A return spring (478) is provided between one end (472) of the door interlock mechanism (470) and the first compartment rail portion (130). When no external force is applied, the first interlock rod (410) is moved rearward by the force of the return spring (478). That is, when no force is applied by the fuse carriage (500), one end (472) of the door interlock mechanism (470) is in a state of rotating rearward, and therefore the first interlock rod (410) also moves rearward and is in a state of not restricting the opening of the first compartment door (150).

[0185] A first plate restraint member (416) is provided at the front end of the first interlock rod (410). The first plate restraint member (416) may have a cross-section formed in an 'L' shape. When the first plate restraint member (416) is inserted into the first interlock rod insertion groove (155) of the first compartment door (150), it impedes the movement of the first compartment door interlock member (169), thereby restricting the opening of the first compartment door (150).

[0186] A connecting member is attached to the rear end of the first interlock load (410). The connecting member will be described later.

[0187] The second interlock rod (420) is arranged in the front-back direction inside the second compartment (210). The second interlock rod (420) is installed so as to be slidable adjacent to one of the second compartment side panels (214) of the second compartment (210). To this end, the second interlock rod (420) has a plurality of second sliding holes (421) formed in the front-back direction, and a second guide member (422) is inserted into the second sliding holes (421) and fixed to the second compartment side panel (214). The second interlock rod (420) is slidable in the front-back direction along the second guide pin (422). Here, the second guide member (422) may be composed of a pin, a bolt, or the like.

[0188] The second interlock rod (420) is connected to the first interlock rod (410) by a connecting mechanism. Accordingly, the second interlock rod (420) moves together with the first interlock rod (410).

[0189] A second plate restraint member (426) is provided at the front end of the second interlock rod (420). The second plate restraint member (426) may have a cross-section formed in an 'L' shape. When the second plate restraint member (426) is inserted into the second interlock rod insertion groove (255) of the second compartment door (250), it impedes the movement of the second compartment door interlock member (269), thereby restricting the opening of the second compartment door (250).

[0190] A connecting member is attached to the rear end of the second interlock load (420).

[0191] A connecting mechanism (connecting member) is provided to connect the first interlock rod (410) and the second interlock rod (420) and cause them to move in parallel in the same direction. The connecting mechanism may be composed of a connecting rod or link provided between the first interlock rod (410) and the second interlock rod (420).

[0192] The connecting mechanism is a mechanism configured to allow the first interlock rod (410) and the second interlock rod (420) to move in parallel in the same direction.

[0193] First, let us look at some basic embodiments of the connecting mechanism with reference to FIGS. 26 to 28.

[0194] In the embodiment of Fig. 26, the connecting member is composed of a member that fixedly connects the first interlock rod (410) and the second interlock rod (420). A fixed connecting rod (1410) that fixedly connects the first interlock rod (410) and the second interlock rod (420) is provided. One end of the fixed connecting rod (1410) is fixedly connected to a portion of the first interlock rod (410) by a fastening member (1412), and the other end of the fixed connecting rod (1410) is fixedly connected to a portion of the second interlock rod (420) by a fastening member (1412). Fig. 26 shows that the fixed connecting rod (1410) is coupled to the rear ends of the first interlock rod (410) and the second interlock rod (420).

[0195] When the first interlock rod (410) moves forward or backward, the second interlock rod (420) connected by the fixed connecting rod (1410) also moves forward or backward in parallel in the same direction as the first interlock rod (410).

[0196] In the embodiment of Fig. 27, the connecting member is composed of a member that connects the first interlock rod (410) and the second interlock rod (420) in the form of a pair of tongs or scissors.

[0197] A first pincer member (1430) is connected to a first interlock rod (410), and a second pincer member (1440) is connected to a second interlock rod (420). One end of the first pincer member (1430) is slidably and rotatably connected to the first interlock rod (410) by a first fastening member (1432), and one end of the second pincer member (1440) is slidably and rotatably connected to the second interlock rod (420) by a second fastening member (1442). A long hole is formed in one end of the first pincer member (1430) and one end of the second pincer member (1440), into which a fastening member is slidably inserted.

[0198] The other end of the first pincer member (1430) and the other end of the second pincer member (1440) are rotatably coupled to each other by a shaft member (1420). At this time, the shaft member (1420) is fixed to a side panel (114), etc. Meanwhile, a torsion spring (1425) is installed in the shaft member (1420). One end of the torsion spring (1425) is fixed to the first pincer member (1430), and the other end of the torsion spring (1425) is fixed to the second pincer member (1440). The pincer members (1430, 1440) receive force according to the movement of the first interlock rod (410) and transmit the force to the second interlock rod (420).

[0199] When the first interlock rod (410) moves forward or backward, the first pincer member (1430) rotates. The second pincer member (1440) connected to the shaft member (1420) receives the force of the torsion spring (1425) and rotates in the opposite direction to the first pincer member (1430). The second interlock rod (420) also moves forward or backward under the force of the second pincer member (1440).

[0200] When the first interlock rod (410) moves forward or backward, the second interlock rod (420) connected by the gripper member (1430, 1440) also moves forward or backward in parallel in the same direction.

[0201] In the embodiment of Fig. 28, the connecting member is composed of a first rotation link (1450), a second rotation link (1460), and an intermediate link (1470) connecting the first interlock rod (410) and the second interlock rod (420).

[0202] A first rotation link (1450) is connected to a first interlock rod (410), and a second rotation link (1460) is connected to a second interlock rod (420). One end of a first rotation link (1450) that rotates about a first rotation axis (1452) is rotatably connected to the first interlock rod (410), and one end of a second rotation link (1460) that rotates about a second rotation axis (1462) is rotatably connected to the second interlock rod (420).

[0203] A long hole is formed in one end of the first rotation link (1450) along the longitudinal direction and is coupled to the first interlock rod (410) by a first fastening member (1451). A long hole is formed in one end of the second rotation link (1460) along the longitudinal direction and is coupled to the second interlock rod (420) by a second fastening member (1461).

[0204] The first rotation link (1450) slides and rotates according to the linear movement of the first interlock rod (410), and the second interlock rod (420) slides and rotates according to the linear movement of the second rotation link (1460).

[0205] An intermediate link (1470) is coupled to the other end of the first rotation link (1450) and the other end of the second rotation link (1460). One end of the intermediate link (1470) is slidably and rotatably coupled to the other end of the first rotation link (1450) by a third fastening member (1453), and the other end of the intermediate link (1470) is rotatably coupled to the other end of the second rotation link (1460) by a fourth fastening member (1463). To this end, a long hole (1471) is formed along the longitudinal direction at one end of the intermediate link (1470), and a hole is formed at the other end of the intermediate link (1470).

[0206] The first rotation link (1450) and the second rotation link (1460) are arranged in opposite directions with respect to the longitudinal direction of the intermediate link (1470) and rotate in opposite directions. When the first rotation link (1450) rotates counterclockwise, the intermediate link (1470) is pulled upward by the first rotation link (1450), and the second rotation link (1460) rotates clockwise along the intermediate link (1470).

[0207] When the first interlock load (410) moves forward or backward, the second interlock load (420) connected by the link portion (1450, 1460, 1470) also moves forward or backward in the same direction parallel to the first interlock load (410).

[0208] A connecting mechanism (connecting member) according to one embodiment of the present invention will be described with reference to FIG. 16.

[0209] A connecting mechanism of a compartment-linked door interlock device according to one embodiment of the present invention includes a first rotation link (430) connected to a first interlock rod (410), a second rotation link (440) connected to a second interlock rod (420), and an intermediate link (450, 460) connected between the first rotation link (430) and the second rotation link (440).

[0210] A first rotation link (430) is connected to the first interlock load (410), and a second rotation link (440) is connected to the second interlock load (420).

[0211] The first rotation link (430) is axially coupled to the first compartment side panel (114) or the first interlock bracket (480) installed thereon. A first shaft member (433) is provided in the middle of the first rotation link (430).

[0212] The first rotation link (430) has a first link first arm portion (431) and a first link second arm portion (432) that extend from each other at a predetermined angle based on the first shaft member (433).

[0213] The first link first arm portion (431) is rotatably coupled to the rear end of the first interlock rod (410). A long hole (434) is formed in the longitudinal direction of the first link first arm portion (431). The first fastening member (437) is coupled through the long hole of the first link first arm portion (431) and the hole of the first interlock rod (410). The first rotation link (430) slides and rotates according to the linear movement of the first interlock rod (410).

[0214] The first link second arm (432) is rotatably coupled to the first intermediate link (450). A hole is formed in the first link second arm (432). The second fastening member (438) is coupled through the hole of the first link second arm (432) and the hole of the first intermediate link (450). The first intermediate link (450) also moves according to the rotational movement of the first rotational link (430).

[0215] A first return spring (439) is provided between the first interlock bracket (480) and the first interlock rod (410). When the first interlock rod (410) moves forward, elastic force is stored in the first return spring (439), and when the force acting on the first interlock rod (410) is removed, the first interlock rod (410) is returned to the rear by the restoring force of the first return spring (439).

[0216] The second rotation link (440) is axially coupled to the second compartment side panel (214) or the second interlock bracket (490) installed thereon. A second shaft member (443) is provided in the middle of the second rotation link (440).

[0217] The second rotation link (440) has a second link first arm portion (441) and a second link second arm portion (442) that extend from each other at a predetermined angle based on the second shaft member (443).

[0218] The second link first arm (441) is rotatably coupled to the rear end of the second interlock rod (420). A long hole (444) is formed in the second link first arm (441) along the longitudinal direction. A second fastening member (447) is coupled through the long hole of the second link first arm (441) and the hole of the second interlock rod (420). The second rotation link (440) slides and rotates according to the linear movement of the second interlock rod (420).

[0219] The second link second arm (442) is rotatably coupled to the second intermediate link (460). A hole is formed in the second link second arm (442). The second fastening member (448) is coupled through the hole of the second link second arm (442) and the hole of the second intermediate link (460). The second rotational link (440) rotates according to the translational movement of the second intermediate link (460).

[0220] A second return spring (449) is provided between the second interlock bracket (490) and the second interlock rod (420). When the second interlock rod (420) moves forward, elastic force is stored in the second return spring (449), and when the force acting on the second interlock rod (420) is removed, the second interlock rod (420) is returned to the rear by the restoring force of the second return spring (449).

[0221] Intermediate links (450, 460) are coupled to the first link second arm (432) of the first rotation link (430) and the second link second arm (442) of the second rotation link (440). One end of the first intermediate link (450) is slidably coupled to the first link second arm (432) of the first rotation link (430), and one end of the second intermediate link (460) is rotatably coupled to the second link second arm (442) of the second rotation link (440).

[0222] The first intermediate link (450) and the second intermediate link (460) can be installed at a predetermined angle to each other. This is provided to compensate for differences in the positions (positions in the forward-rear direction axis) where the first intermediate link (450) is connected to the first link second arm (432) and where the second intermediate link (460) is connected to the second link second arm (442).

[0223] The first rotation link (430) and the second rotation link (440) are arranged in opposite directions with respect to the intermediate link (450, 460) and rotate in opposite directions. When the first rotation link (430) rotates counterclockwise, the intermediate link (450, 460) is pulled upward by the first rotation link (430), and the second rotation link (440) rotates clockwise along the intermediate link (450, 460).

[0224] The first rotation link (430) and the second rotation link (440) are installed to rotate in opposite directions. To this end, the first rotation link (430) and the second rotation link (440) are positioned on opposite sides with respect to the intermediate link (450, 460). In the embodiment of Fig. 16, when the first interlock rod (410) moves forward (right in the drawing), the first rotation link (430) rotates clockwise and the second rotation link (440) rotates counterclockwise.

[0225] The first rotation link (430) is positioned below the first interlock rod (410), and the second rotation link (440) is positioned above the second interlock rod (420). Accordingly, the first interlock rod (410) and the second interlock rod (420) move in the same direction by receiving the operation of the first rotation link (430) and the second rotation link (440) that rotate in opposite directions.

[0226] When the first interlock load (410) moves forward or backward, the second interlock load (420) connected by the link portion (430, 440, 450, 460) also moves forward or backward in parallel in the same direction as the first interlock load (410).

[0227] The door interlock mechanism (470) is a member that operates in conjunction with the insertion or withdrawal of the fuse carriage (500).

[0228] The door interlock mechanism (470) is rotatably installed on the first compartment rail portion (130). The door interlock mechanism (470) is rotatably installed on the first compartment rail portion (130) by an operation shaft (471). A fastening hole (474) is formed at one end (472) of the door interlock mechanism (470) and is slidably and rotatably connected to the door interlock mechanism connection portion (415) of the first interlock rod (410) by a fastening member. Here, the fastening hole (474) is formed as a long hole so that the fastening member can slide relative to each other.

[0229] When the other end (473) of the door interlock operating member (470) moves due to the movement of the fuse carriage (500), the door interlock operating member (470) rotates based on the operating axis (471), and accordingly, one end (472) of the door interlock operating member (470) also rotates to move the first interlock rod (410) forward or backward.

[0230] A return spring (478) is provided between one end (472) of the door interlock mechanism (470) and the first compartment rail portion (130). When no external force is applied, the first interlock rod (410) is moved rearward by the force of the return spring (478). That is, when no force is applied by the fuse carriage (500), one end (472) of the door interlock mechanism (470) is rotated rearward, and the first interlock rod (410) also moves rearward, thereby not restricting the opening of the first compartment door (150).

[0231] Interlock brackets (480, 490) are provided so that link sections (430, 440, 450, 460) can be installed. The interlock brackets include a first interlock bracket (480) to which a first rotation link (430) is rotatably coupled, and a second interlock bracket (490) to which a second rotation link (440) is rotatably coupled.

[0232] The first interlock bracket (480) is fixed to the first compartment side panel (114). A first rotation link (430) is rotatably coupled to the first interlock bracket (480).

[0233] The second interlock bracket (490) is fixed to the second compartment side panel (214). A second rotation link (440) is rotatably coupled to the second interlock bracket (490).

[0234] The operation of a compartment-linked door interlock device according to one embodiment of the present invention will be described mainly with reference to FIGS. 17 to 25.

[0235] Figures 17 and 18 show that the fuse trolley (500) is in a disconnected state. Both the primary circuit and the secondary circuit are not connected. Figure 17 shows that the first compartment door handle (157) of the first compartment door handle portion (156) and the second compartment door handle (257) of the second compartment door handle portion (256) are lowered (closed), and Figure 18 shows that the first compartment door handle (157) of the first compartment door handle portion (156) and the second compartment door handle (257) of the second compartment door handle portion (256) are raised (opened).

[0236] In the disconnected position, the first interlock rod (410) of the first compartment (110) and the second interlock rod (420) of the second compartment (210) are positioned at the rear, so they do not restrain the first compartment door sliding plate (165) and the second compartment door sliding plate (265). Therefore, there is no restraint in opening the compartment door (150, 250) by lifting the compartment door handle (157, 257) of each compartment (110, 210). Fig. 18 shows that when the compartment door handle (157, 257) of each compartment (110, 210) is raised, the movement of the compartment door sliding plate (165, 265) is not restricted by each interlock rod (410, 420), so that the compartment door sliding plate (165, 265) rises and each compartment door (150, 250) can be opened.

[0237] Fig. 20 is a top view of a disconnected state corresponding to Fig. 17. The fuse carriage (500) is positioned forward, the door interlock operating member (470) is not subject to the force of the fuse carriage (500), and the first interlock rod (410) moves rearward and does not bind the first compartment door sliding plate (165). Since the second interlock rod (420) also moves together with the first interlock rod (410), the second interlock rod (420) moves rearward and does not bind the second compartment door sliding plate (265).

[0238] Figures 22 and 24 are partial detailed views of each compartment in a disconnected state corresponding to Figure 17. As shown in Figure 22, in the first compartment (110), the first interlock rod (410) moves rearward and is out of the first interlock rod insertion groove (155) of the first compartment door panel (151), so as not to bind the first compartment door sliding plate (165). On the other hand, as shown in Figure 24, in the second compartment (210), the second interlock rod (420) moves rearward and is out of the second interlock rod insertion groove (255) of the second compartment door panel (251), so as not to bind the second compartment door sliding plate (265).

[0239] Fig. 19 shows the fuse carriage in a connected state. The fuse carriage (500) has moved to the connected position, and the primary circuit is connected. The first compartment door handle (157) of the first compartment door handle portion (156) and the second compartment door handle (257) of the second compartment door handle portion (256) are lowered (closed) and do not rise.

[0240] Since the first interlock rod (410) of the first compartment (110) and the second interlock rod (420) of the second compartment (210) are positioned forward, they restrain the first compartment door sliding plate (165) and the second compartment door sliding plate (265). Therefore, the compartment door handle (157, 257) of each compartment (110, 210) cannot be raised to open the respective compartment doors (150, 250). When an attempt is made to raise the compartment door handle (157, 257) of each compartment (110, 210), the movement of the compartment door sliding plates (165, 265) is restrained by the respective interlock rods (410, 420), so that the compartment door sliding plates (165, 265) cannot rise, and the respective compartment doors (150, 250) cannot be opened.

[0241] Fig. 21 is a top view of a connected state corresponding to Fig. 19. The fuse carriage (500) is located at the rear, the door interlock operating member (470) is in a state of being rotated by the force of the fuse carriage (500), and the first interlock rod (410) moves forward to restrain the first compartment door sliding plate (165). Since the second interlock rod (420) also moves together with the first interlock rod (410) by the connecting mechanism, the second interlock rod (420) moves forward to restrain the second compartment door sliding plate (265).

[0242] Figures 23 and 25 are partial detailed views of each compartment in a connected state corresponding to Figure 19. As shown in Figure 23, in the first compartment (110), the first interlock rod (410) moves forward and is inserted into the first interlock rod insertion groove (155) of the first compartment door panel (151) to restrain the first compartment door sliding plate (165). Meanwhile, as shown in Figure 25, in the second compartment (210), the second interlock rod (420) moves forward and is inserted into the second interlock rod insertion groove (255) of the second compartment door panel (251) to restrain the second compartment door sliding plate (265).

[0243] According to a distribution board having a compartment-linked door interlock device according to the present invention, when the circuit of the first compartment is connected by the compartment-linked door interlock device, the opening of the doors of all compartments is restricted.

[0244] When the power device in the first compartment is brought into the operating position, the first interlock rod moves to a position where it restricts the opening of the first compartment door. At this time, the first interlock rod that restricts the opening of the first compartment door and the second interlock rod that restricts the opening of the second compartment door operate simultaneously through a connecting mechanism, so that when the power device in the first compartment is connected, the opening of not only the first compartment door but also the second compartment door is automatically restricted.

[0245] Therefore, it protects users from arc currents caused by the separation of the primary circuit, etc. and satisfies regulations.

[0246] 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.

[0247] [Explanation of symbols]

[0248] 100 transformer panels

[0249] 110 First compartment

[0250] 112 Compartment 1 bottom panel

[0251] 114 Side panel of compartment 1

[0252] 118 Compartment 1 sliding plate restraint

[0253] 120,125 Terminal 1

[0254] 130 Rail section of compartment 1

[0255] 140 shutter assembly

[0256] 150 Compartment 1 door

[0257] 151 Compartment 1 door panel

[0258] 154 First compartment door restraint insertion hole

[0259] 155 1st interlock load insertion groove

[0260] 156 Compartment 1 door handle

[0261] 160 Compartment 1 door side plate

[0262] 165 Compartment 1 door sliding plate

[0263] 168 Compartment 1 door catch

[0264] 169 No interlock in the first compartment door

[0265] 170 Compartment 1 handle insert

[0266] 180 transport unit

[0267] 182 Inlet / outlet handle insertion port

[0268] 183 lead screw

[0269] 210 Second compartment

[0270] 214 Second compartment side panel

[0271] 225 Terminal 2

[0272] 227 Second compartment bus bar

[0273] 230 Second compartment rail section

[0274] 240 Transformer Transfer Unit

[0275] 250 Second compartment door

[0276] 256 Second compartment door handle

[0277] 260 Second compartment door side plate

[0278] 265 Second compartment door sliding plate

[0279] 268 Second compartment door catch

[0280] 269 ​​No interlock for the second compartment door

[0281] 310 Mothership Room

[0282] 360 cable room

[0283] 400-compartment interlock door interlock device

[0284] 410 1st Interlock Road

[0285] 411 1st sliding hole

[0286] 412 Absence of the first guide

[0287] 415 Door interlock actuator connection part

[0288] 416 First plate restraint

[0289] 420 Second Interlock Road

[0290] 421 Second sliding hole

[0291] 422 Absence of the second guide

[0292] 426 Second plate restraint

[0293] 430 First rotation link

[0294] 440 Second Rotation Link

[0295] 450 First Intermediate Link

[0296] 460 Second Intermediate Link

[0297] 470 Door Interlock Actuator

[0298] 480 1st interlock bracket

[0299] 490 2nd interlock bracket

[0300] 500 1st power equipment, fuse cart

[0301] 510 Terminal 1

[0302] 520 Terminal 2

[0303] 530 fuse

[0304] 540 Fuse Cart Transfer Unit

[0305] 600 Secondary power equipment, instrument transformers

[0306] 650 wiring circuit breaker

Claims

1. 1 A first compartment in which power devices connecting the primary circuit are placed; A second compartment arranged adjacent to the first compartment and to which a secondary circuit is connected; A first interlock rod installed in the first compartment to move forward and backward, and moving in the opposite direction according to the forward and backward movement of the power device to restrict or allow the opening of the first compartment door; A second interlock rod installed in the second compartment to move forward and backward and to restrict or allow the opening of the second compartment door; and A distribution board having a compartment-linked door interlock device including a connecting member that connects the first interlock load and the second interlock load to move in the same direction.

2. In paragraph 1, A distribution board having a compartment-linked door interlock device, wherein the connecting member includes a fixed connecting rod that fixedly connects the first interlock rod and the second interlock rod.

3. In paragraph 1, The above connecting member is, A first gripper member, one end of which is rotatably connected to the first interlock rod; and Further comprising a second gripper member, one end of which is rotatably connected to the second interlock rod, and the other end of which is rotatably connected to the other end of the first gripper member, A distribution board having a compartment-linked door interlock device in which the first and second clamp leg members rotate in opposite directions.

4. In paragraph 3, A distribution board having a compartment-linked door interlock device in which a torsion spring is provided at a portion where the first and second clamp leg members are joined.

5. In paragraph 1, The above connecting member is, A first rotation link that is installed in the first compartment so as to be rotatable and has one end connected to the first interlock rod; A second rotation link that is installed in the second compartment so as to be rotatable and has one end connected to the second interlock rod; and A distribution board having a compartment-linked door interlock device including an intermediate link connected between the other end of the first rotation link and the other end of the second rotation link.

6. In paragraph 5, The above first rotary link, The first link first arm portion, which is extended at a predetermined angle to each other, and the first link second arm portion, which is connected to one end of the intermediate link, are formed to extend, The above second rotating link, A distribution panel having a compartment-linked door interlock device in which a first arm of a second link, to which the second interlock rod is connected, is extended at a predetermined angle to each other, and a second arm of a second link, to which the second interlock rod is connected, is extended and connected to the other end of the intermediate link.

7. In paragraph 6, A distribution board having a compartment-linked door interlock device in which a long hole is formed in the first arm portion of the first link and the first arm portion of the second link.

8. In paragraph 6, A first return spring is provided between the first link first arm portion and the first interlock rod, A distribution board having a compartment-linked door interlock device having a second return spring provided between the first arm portion of the second link and the second interlock rod.

9. In paragraph 5, The above intermediate link is, a first intermediate link connected to the first interlock load; and A distribution board having a compartment-linked door interlock device including a second intermediate link, the first end of which is connected to the second interlock load and the other end of which is connected to the other end of the first intermediate link.

10. In paragraph 9, A distribution board having a compartment-linked door interlock device in which the first intermediate link and the second intermediate link are arranged at a predetermined angle to each other.

11. In paragraph 5, A distribution board having a compartment-linked door interlock device in which the first and second rotation links are positioned on opposite sides of the length direction of the intermediate link.

12. In paragraph 5, A distribution board having a compartment-linked door interlock device, wherein the first rotation link is positioned below the first interlock rod, and the second rotation link is positioned above the second interlock rod.

13. In paragraph 5, A distribution board having a compartment-linked door interlock device, in which a door interlock operating member that contacts the first compartment and transmits force to the first interlock rod when the power device moves is installed in the first compartment.

14. In paragraph 5, In the first compartment, a first interlock bracket is installed to which the first rotation link is rotatably connected, A distribution board having a compartment-linked door interlock device, in which a second interlock bracket to which the second rotation link is rotatably connected is installed in the second compartment.

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