Switchboard having secondary circuit closing interlock device

Abstract

The present invention relates to a switchboard having a secondary circuit closing interlock device and, more specifically, to a switchboard having an interlock device for controlling the closing of a secondary circuit of a transformer panel having multiple compartments. According to a switchboard having an interlock device according to the present invention, an interlock device for interlocking a door of a transformer chamber for instruments and a switch lever of a circuit breaker for wiring is provided in a transformer panel having a fuse cart compartment and a transformer compartment for instruments, to prevent the circuit breaker for wiring from being turned on in a state where the door of the transformer chamber for instruments is opened and thus prevent the closing of a secondary circuit flowing to a load.

Description

Distribution board with secondary circuit input interlock device

[0001] The present invention relates to a switchboard having a secondary circuit closing interlock device, and more particularly, to a switchboard having an interlock device for controlling the closing of a secondary circuit of a transformer panel 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, in the case of high-voltage switchboards, as transformer capacities increased, the fuse and instrument transformers, previously manufactured as a single unit, began to be separated. This meant that operating the transformer room as a single compartment became difficult, leading to the development of switchboards with separate compartments: one for the fuses and another for the instrument transformers. In this case, a separate instrument transformer panel was installed, containing the fuse and instrument transformer compartments.

[0018] A transformer panel of this type is illustrated in Fig. 2.

[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 3 to 6 illustrate a conventional instrument transformer room (61) and a wiring circuit breaker (80).

[0030] A remote control handle (90) is provided on the outside of the door (64) of the instrument transformer room (61).

[0031] 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).

[0032] 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.

[0033] 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 accidents due to exposure to high voltage and other hazards.

[0034] The basic operating sequence of the transformer panel (50) is as follows.

[0035] First, the operating sequence upon input is as follows.

[0036] Close the fuse room (51) door and the instrument transformer room (61) door.

[0037] Connect the primary circuit by bringing the fuse carrier (55) into the operating position.

[0038] Turn the switch of the wiring circuit breaker (80) to the on position to connect the secondary circuit.

[0039] Next, the driving sequence when opening is as follows.

[0040] Turn the switch of the wiring circuit breaker (80) to the off position to open the secondary circuit.

[0041] The fuse cartridge (55) is pulled out to the disconnected position to open the primary circuit.

[0042] Open the fuse room (51) door and the instrument transformer room (61) door.

[0043] Failure to follow this order may result in a safety hazard.

[0044] 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.

[0045] With the door closed, it is possible to connect the secondary circuit without connecting the primary circuit. This is considered test mode.

[0046] Additionally, opening the door while the primary circuit or secondary circuit is connected, or disconnecting the primary circuit while the secondary circuit is connected, is not permitted.

[0047] These matters are also stipulated in laws.

[0048] Interlock devices are necessary to comply with these regulations and protect drivers.

[0049] As described above, the wiring circuit breaker (80) can be turned on and off by the remote control handle (90). Therefore, an interlock must be provided to prevent the secondary circuit from being turned on by operating the wiring circuit breaker (80) while the compartment door is open.

[0050] 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, a structure that prevents the wiring circuit breaker (80) from being turned on by operating the remote control handle (90) while the instrument transformer room (61) door (64) is open has not been developed.

[0051] The present invention has been made to solve the above-mentioned problem, and its purpose is to provide a distribution panel including a transformer panel having a first compartment in which a fuse carrier is installed and a second compartment in which an instrument transformer is installed, and having a secondary circuit closing interlock device that prevents a wiring circuit breaker for secondary circuit connection from being closed while the door of the second compartment is not closed.

[0052] A distribution board having an interlock device according to one embodiment of the present invention comprises: a compartment in which a power device is installed; a circuit breaker installed in the compartment and electrically connected to the power device; a sliding plate installed on one side of the circuit breaker so as to be able to slide, and a switch lever of the circuit breaker being coupled to a portion of the sliding plate; and an interlock pin installed so as to intersect the sliding plate, the interlock pin restricting or allowing movement of the sliding plate depending on contact or separation of a compartment door.

[0053] Here, the interlock pin is arranged to move in a direction crossing the direction of movement of the sliding plate.

[0054] Here, the above-mentioned compartment further includes a fixed bracket to which the sliding plate is coupled so as to enable sliding movement.

[0055] Additionally, a sliding hole is formed in the fixed bracket to guide the movement of the sliding plate.

[0056] Additionally, a sliding fastening member that is fastened to the sliding plate is inserted into the sliding hole.

[0057] In addition, a plate pressurizing member is provided that is connected to the switch lever of the circuit breaker for the wiring and is coupled to the fitting hole of the sliding plate.

[0058] In addition, a pressure hole is formed in the fixed bracket to provide a space in which the plate pressure member can act.

[0059] Additionally, a pin insertion hole into which the interlock pin is inserted is formed in the fixed bracket.

[0060] Additionally, a restraining hole into which the interlock pin is inserted is formed in the sliding plate.

[0061] Additionally, a sliding portion having a width smaller than the diameter of the restraint hole is formed to extend below the restraint hole.

[0062] Additionally, interference prevention holes are formed on the left and right sides of the restraint hole in the sliding plate.

[0063] Additionally, a pinhole is formed in the interlock pin into which a guide pin for guiding the movement of the interlock pin is inserted.

[0064] In addition, the interlock pin has a restraining portion that restrains the movement of the sliding plate when inserted into the restraining hole, and a leg portion that is formed with a diameter smaller than the diameter of the restraining portion and can be inserted into the sliding portion.

[0065] Additionally, it further includes an extension bracket that is fixed to the front of the fixed bracket and supports the interlock pin.

[0066] Additionally, a guide hole is formed on the side of the extension bracket to guide the movement of the guide pin.

[0067] Additionally, the extension bracket is provided with a support member that supports the interlock pin.

[0068] Additionally, the interlock pin is provided with a return spring.

[0069] In addition, an interlock pin pressurizing portion is provided that is fixed to the rear of the compartment door and presses the interlock pin when the compartment door is closed.

[0070] According to a distribution board having an interlock device according to the present invention, an interlock device is provided in a transformer panel having a fuse dummy compartment and an instrument transformer compartment to link a door of an instrument transformer compartment with a switch lever of a wiring circuit breaker, so that when the door of the instrument transformer compartment is open, the wiring circuit breaker cannot be turned on, thereby preventing a secondary circuit flowing to a load from being turned on.

[0071] Therefore, it prevents safety accidents and meets legal requirements.

[0072] Figure 1 is a perspective view of a distribution panel according to the prior art.

[0073] Figure 2 is a side view of a transformer panel having a compartment for an instrument transformer according to the prior art.

[0074] Figures 3 and 4 are perspective views of the second compartment in Figure 2. Figure 3 shows the door closed, and Figure 4 shows the door open.

[0075] Figures 5 and 6 show the operating states of the circuit breaker for wiring in Figure 4. Figure 5 is in the open state (Off), and Figure 6 is in the closed state (On).

[0076] Figures 7 to 17 are drawings of a distribution panel according to one embodiment of the present invention.

[0077] Here, FIG. 7 is a perspective view of an instrument transformer panel of a distribution panel according to one embodiment of the present invention.

[0078] Figures 8 and 9 are side views of Figure 7. They are mainly illustrated with the fuse carriage compartment and the instrument transformer compartment. Figure 8 shows the fuse carriage in a disconnected (open) state, and Figure 9 shows the fuse carriage in a connected (input) state.

[0079] Figure 10 is a perspective view of the instrument transformer compartment, with the door open.

[0080] Figures 11 and 12 are perspective views of a wiring circuit breaker and a door interlock device viewed from different directions.

[0081] Fig. 13 is a cross-sectional view of the main part of the door interlock device in Fig. 11 taken along a horizontal plane including line AA. It shows a state viewed from above.

[0082] Figure 14 is an exploded perspective view of the main parts of the door interlock device.

[0083] Figures 15 and 16 are operational diagrams of the door interlock device. Figure 15 shows the second compartment door in an open state, and Figure 16 shows the second compartment door in a closed state.

[0084] Fig. 17 is a cross-sectional view of a door interlock device according to another embodiment of the present invention.

[0085] 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.

[0086] 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.

[0087] Fig. 7 is a perspective view of an instrument transformer panel of a distribution board according to one embodiment of the present invention. Figs. 8 and 9 are side views of Fig. 7. The drawings focus on the fuse carrier compartment and the instrument transformer compartment. Fig. 8 shows the fuse carrier in a disconnected (open) state, and Fig. 9 shows the fuse carrier in a connected (input) state. Referring to the drawings, a distribution board having an interlock device according to each embodiment of the present invention will be described in detail.

[0088] A distribution board (100) according to one embodiment of the present invention includes: a first compartment (110) in which a fuse carrier (500) is installed; a second compartment (210) disposed adjacent to the first compartment (110) and in which an instrument transformer (600) is installed; a wiring circuit breaker (650) installed in the second compartment (210) and electrically connected to the instrument transformer (600); a sliding plate (720) installed on one side of the wiring circuit breaker (650) so as to be able to slide, and to which a switch lever (660) of the wiring circuit breaker (650) is coupled; and an interlock pin (730) installed so as to intersect the sliding plate (720) to restrict or allow movement of the sliding plate (720) depending on contact or separation of the second compartment door (250).

[0089] Here, the interlock pin (730) is arranged to move in a direction crossing the direction of movement of the sliding plate (720), and is characterized in that the movement of the sliding plate (720) is restricted or released by moving the interlock pin (730) as the second compartment door (250) of the second compartment (210) is opened or closed.

[0090] 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 is mainly given of the transformer panel (100).

[0091] 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.

[0092] 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, the case where the first compartment (110) is used as a fuse carrier compartment and the second compartment (210) is used as an instrument transformer compartment will be described.

[0093] A fuse carrier (500) is installed in the first compartment (110), and an 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).

[0094] The first compartment (110) is manufactured to accommodate a fuse cradle (500). The fuse cradle (500) moves within the first compartment (110) to a disconnected position, a test position (see FIG. 8), and a connected position (see FIG. 9). Here, the test position is a state in which the primary power supply is not connected and only the secondary power supply is connected (the wiring circuit breaker in the second compartment is turned on).

[0095] 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 can be rotated in the form of a swing door to open and close the first compartment (110).

[0096] 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).

[0097] 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 (160), etc. are provided.

[0098] 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.

[0099] 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).

[0100] 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).

[0101] 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.

[0102] 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).

[0103] 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.

[0104] 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.

[0105] 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 (160) of the first compartment (110) and moves forward and backward to move the fuse cart (500).

[0106] A transfer device (160) is provided on the bottom surface of the first compartment (110). The transfer device (160) provides power to move the fuse cart (500). The transfer device (160) converts the rotational force of the screw handle into linear motion to move the fuse cart (500) in the forward and backward directions.

[0107] In the transport device (160), a lead screw (163) is arranged in the forward and backward direction. The lead screw (163) 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.

[0108] A pull-out handle (not shown) is provided to rotate the lead screw (163), and the pull-out handle is connected through a pull-out handle insertion port (not shown) through which the front end of the lead screw (163) is exposed.

[0109] In order to access the insertion / withdrawal handle insertion port (not shown) of the transport device (160), a first compartment door (150) is provided with a first compartment handle insertion port (152). That is, a user can insert the insertion / withdrawal handle into the first compartment handle insertion port (152) and the insertion / withdrawal handle insertion port (not shown) with the first compartment door (150) closed, fit it into the lead screw (163), and perform an insertion / withdrawal movement operation for the fuse carriage (500).

[0110] 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 (160) and the fuse cart transport section (540). The transport wheel (545) moves along the first compartment rail section (130).

[0111] 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).

[0112] The shutter assembly (140) includes a shutter drive lever (141), a link rod (143, 144), a shutter lever (145), and a shutter plate (147).

[0113] 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 (143, 144) connected thereto are lowered respectively, causing the shutter lever (145) to rotate around the rotation axis (146) and raise the shutter plate (147) upward. Accordingly, the shutter plate (147) covering the first terminal (120) of the first compartment is opened, allowing the first terminal (520) to be connected.

[0114] The first compartment door (150) is placed on the front of the distribution panel case (100). The first compartment door (150) is placed to cover the distribution panel case (100).

[0115] The first compartment door (150) is provided with a first compartment handle insertion port (152) into which an insertion / withdrawal handle can be inserted.

[0116] The first compartment door (150) is installed so that one side is fixed to the distribution panel housing (100) 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 (155) is arranged on the opposite side of the first compartment door (150) where the hinge member is installed. The user opens or closes the first compartment door (150) with respect to the first compartment (110) by opening and closing the door handle (155).

[0117] The first compartment door (150) further includes a door sliding plate (not shown) that moves up and down in conjunction with the opening and closing operation of the first compartment door handle (155).

[0118] A first door interlock rod (157) is provided to restrain 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 (157) moves forward by a linkage mechanism to restrain the door sliding plate, thereby restraining the opening of the first compartment door handle portion (155).

[0119] A second compartment (210) is provided. An instrument transformer (600) is installed in the second compartment (210).

[0120] 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).

[0121] An instrument transformer (600) includes an iron core (620) and a coil (610).

[0122] 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.

[0123] The coil (610) has a primary coil on the outside and a secondary coil on the inside.

[0124] 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) (652) of the wiring circuit breaker (650).

[0125] 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.

[0126] 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.

[0127] 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).

[0128] 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.

[0129] 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.

[0130] 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).

[0131] 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.

[0132] 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).

[0133] 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).

[0134] 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).

[0135] 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 can be rotated in the form of a swing door to open and close the second compartment (210). A handle portion (255) is provided on the second compartment door (250) so that a user can open and close the second compartment door (250) by grasping it.

[0136] The second compartment door (250) can be installed so that one side is fixed to the distribution panel housing (200) and the other side can be rotated to open and close. 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 door handle (255) is arranged on the opposite side of the second compartment door (250) where the hinge member is installed. The user opens or closes the second compartment door (250) with respect to the second compartment (210) by opening and closing the second compartment door handle (255).

[0137] The second compartment door (250) further includes a door sliding plate (not shown) that moves up and down in conjunction with the opening and closing operation of the second compartment door handle (255).

[0138] A second door interlock rod (257) is provided to restrain the opening of the second compartment door (250) when the fuse carriage (500) is inserted. When the fuse carriage (500) of the first compartment (110) moves to the connected position, the first door interlock rod (157) moves forward to restrain the opening of the first compartment door (150), and the second door interlock rod (257) also moves forward by a linkage mechanism to restrain the door sliding plate and restrain the opening of the second compartment door handle portion (255).

[0139] 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) (secondary circuit).

[0140] 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).

[0141] In the cable room (360), the high voltage section can be extended and necessary cables can be installed.

[0142] Fig. 10 is a perspective view of the instrument transformer compartment. The door is open. Figs. 11 and 12 are perspective views of the wiring circuit breaker and the door interlock device viewed from different directions. Fig. 13 is a cross-sectional view of the main part of the door interlock device in Fig. 11 taken along the horizontal plane including the line AA. This shows the state as viewed from above. Fig. 14 is an exploded perspective view of the main part of the door interlock device. Meanwhile, Fig. 17 illustrates the basic form of the secondary circuit closing interlock device of the present invention.

[0143] A wiring circuit breaker (650) is installed inside the second compartment (210). The wiring circuit breaker (650) is connected between the secondary side of the instrument transformer (600) and the load. Accordingly, the wiring circuit breaker (650) connects or cuts off the current supplied to the load.

[0144] A wiring circuit breaker (650) is provided. The wiring circuit breaker (650) is fixedly installed on the side (211) of the second compartment (210). In addition, the wiring circuit breaker (650) is placed adjacent to the second compartment door (250).

[0145] An interlock pin pressurizing portion (260) is provided on the inner surface of the second compartment door (250). When the second compartment door (250) is closed, the interlock pin pressurizing portion (260) presses the interlock pin (730) of the door interlock device.

[0146] A wiring circuit breaker (650) transmits or blocks the current from the secondary terminal of an instrument transformer (600) to a load. That is, the wiring circuit breaker (650) energizes or blocks the secondary (side) circuit. Here, the load may be a power device or control device installed in a distribution panel.

[0147] A first terminal section (power side terminal section) (652) is provided on one side of the wiring circuit breaker (650), and a second terminal section (load side terminal section) (654) is provided on the other side.

[0148] A switch lever (660) is provided to turn the circuit breaker (650) on / off. The switch lever (660) operates the mechanical part of the circuit breaker (650) to connect or disconnect the contact part.

[0149] A remote operation handle (690) is provided to operate the circuit breaker (650) from outside the second compartment (210). The remote operation handle (690) includes a remote lever (692), a cable (693), and an operation lever (695).

[0150] When a user rotates a remote lever (692) in an up-and-down direction on a remote operation handle (690) positioned outside the second compartment door (250), a cable (693) connected to the rear end of the remote lever (692) is pulled or returned to its original position, thereby moving the operation lever (695) in an up-and-down direction. The operation lever (695) supports the switch lever (660), and thus, turns the circuit breaker (650) on / off.

[0151] A wiring circuit breaker (650) is mounted on the side plate (211) of the second compartment (210). A mounting bracket (670) is provided to mount the wiring circuit breaker (650). The mounting bracket (670) is formed in a 'ㄷ' shape so that the upper surface and the front and rear ends can be opened. It is formed in a size capable of accommodating the wiring circuit breaker (650).

[0152] An operating lever (695) is rotatably connected to the mounting bracket (670). The operating lever (695) is axially connected to a lever shaft (672) of the mounting bracket (670).

[0153] The operating lever (695) is provided with a cable connection port (696) to which a cable (693) is connected. Meanwhile, an arc-shaped operating hole (674) is formed in the mounting bracket (670) to enable the cable connection port (696) to rotate.

[0154] The front of the operating lever (695) is provided with a lever hand (698) that holds and moves the switch lever (660). When the operating lever (695) rotates up and down, the switch lever (660) is turned on / off by receiving the force of the lever hand (698).

[0155] A fastening hole (699) is formed on the left side (the side facing the door) of the operating lever (695) to which the plate pressurizing member (705) is coupled. The plate pressurizing member (705) also rotates in accordance with the rotational movement of the operating lever (695).

[0156] A secondary circuit closing interlock device (700) is provided to restrict or allow the closing (On) operation of the wiring circuit breaker (650) depending on whether the second compartment door (250) of the second compartment (210) is opened or closed.

[0157] The secondary circuit input interlock device (700) may be referred to as a wiring circuit breaker input interlock device or a wiring circuit breaker interlock device linked to the opening and closing of the second compartment door.

[0158] The secondary circuit input interlock device (700) includes a fixing bracket (710), a sliding plate (720), and an interlock pin (730).

[0159] A fixing bracket (710) is provided. The fixing bracket (710) is provided to support components of the secondary circuit input interlock device (700).

[0160] The fixed bracket (710) is attached to the side plate (211) of the second compartment (210). The fixed bracket (710) is provided adjacent to the second compartment door (250). That is, the fixed bracket (710) is installed close to the front of the second compartment (210). Here, when the second compartment door (250) is closed, a space must be provided between the fixed bracket (710) and the second compartment door (250) for the inner portion of the remote control handle (690) to operate.

[0161] The fixed bracket (710) includes a plate portion parallel to the front of the second compartment (210).

[0162] A sliding hole (711) is formed in the fixed bracket (710) to guide the up-and-down movement of the sliding plate (720). The sliding hole (711) is provided as a vertically oriented hole. A plurality of sliding holes (711) are provided to ensure stable operation. The plurality of sliding holes (711) may be arranged separately in the upper and lower portions of the fixed bracket (710).

[0163] A sliding fastening member (722) that is fastened to a sliding plate (720) is inserted into the sliding hole (711).

[0164] A pressure member action hole (713) is formed in the fixed bracket (710) to provide a space in which the plate pressure member (705) can act. The pressure member action hole (713) is provided as a long hole that is formed wide in the vertical direction. The pressure member action hole (713) is formed to be larger than the range of motion of the plate pressure member (705).

[0165] A pin insertion hole (715) into which an interlock pin (730) is inserted is formed in the fixed bracket (710). The pin insertion hole (715) is formed to be wider than the diameter of the working part of the interlock pin (730).

[0166] In the fixed bracket (710), a fastening hole (717) is formed on each of the left and right sides of the pin insertion hole (715) to which an extension bracket (740) is fixed.

[0167] A sliding plate (720) is provided. The sliding plate (720) is connected to the operating lever (695) and the interlock pin (730) to restrict or allow the movement of the operating lever (695).

[0168] The sliding plate (720) is formed in a plate shape that is arranged parallel to the fixed bracket (710). The sliding plate (720) can be arranged to be in contact with the fixed bracket (710). The sliding plate (720) can slide in an up-and-down direction while in contact with one side of the fixed bracket (710).

[0169] A sliding fastening member (722) that is inserted into a sliding hole (711) of a fixed bracket (710) is coupled to the sliding plate (720). A plurality of sliding fastening members (722) are provided corresponding to the sliding holes (711).

[0170] The sliding fastening member (722) is inserted into the sliding hole (711) and fixed to the sliding plate (720). The sliding fastening member (722) is coupled with a predetermined gap to prevent the sliding plate (720) from being fixed to the fixing bracket (710).

[0171] A fitting hole (723) into which a plate pressurizing member (705) is fitted is formed in the sliding plate (720). The fitting hole (723) is formed to be larger than the plate pressurizing member (705) in the horizontal direction to allow horizontal movement of the plate pressurizing member (705). The fitting hole (723) fixes the plate pressurizing member (705) in the vertical direction. Accordingly, the sliding plate (720) also moves along with the vertical movement of the plate pressurizing member (705). The plate pressurizing member (705) can extend through the fitting hole (723) to the pressurizing member operating hole (713) of the fixed bracket (710).

[0172] A restraining hole (725) into which an interlock pin (730) is inserted is formed in the sliding plate (720). When the restraining portion (735) at the end of the interlock pin (730) is inserted into the restraining hole (725), movement of the sliding plate (720) is restricted, and when the restraining portion (735) of the interlock pin (730) is removed from the restraining hole (725), movement of the sliding plate (720) is permitted.

[0173] A sliding portion (726) is formed extending from the lower portion of the restraint hole (725). The sliding portion (726) is formed as a vertical groove. The width of the sliding portion (726) is formed to be smaller than the diameter of the restraint hole (725).

[0174] The sliding part (726) slides by inserting the leg part (734) of the interlock pin (730). When the restraint part (735) of the interlock pin (730) moves inward and out of the restraint hole (725), the leg part (734) of the interlock pin (730) can move within the sliding part (726). In reality, when the sliding plate (720) moves up and down, the sliding part (726) moves up and down along the leg part (734).

[0175] An interference prevention hole (728) may be formed on the left and right sides of the restraint hole (725) in the sliding plate (720). The interference prevention hole (728) is formed as a vertically oriented hole. The interference prevention hole (728) allows the fastening member of the extension bracket (740) to move without interference.

[0176] The sliding plate (720) is provided with a horizontal plate (729) on the upper side. The horizontal plate (729) protects the interlock pin (730) on the lower side, etc.

[0177] An interlock pin (730) is provided. The interlock pin (730) restricts or allows the movement of the sliding plate (720). The interlock pin (730) moves in a direction crossing the direction of movement of the sliding plate (720). For example, if the sliding plate (720) moves in a vertical direction, the interlock pin (730) moves in a horizontal direction.

[0178] The interlock pin (730) includes a head portion (731), a body portion (732), a leg portion (734), and a restraint portion (735).

[0179] The head (731) is positioned forward. The head (731) is a portion that comes into contact with the second compartment door (250). When the head (731) comes into contact with the second compartment door (250), a force is applied to move the interlock pin (730). The diameter of the head (731) is formed to be larger than the diameter of the body (732).

[0180] The body portion (732) forms the longest part of the interlock pin (730). The diameter of the body portion (732) is formed to be smaller than the diameter of the head portion (731). The body portion (732) is inserted into the support member (750) and moves. A portion of the body portion (732) is placed inside the extension bracket (740).

[0181] The length of the body part (732) is appropriately set considering the distance between the second compartment door (250) and the fixed bracket (710).

[0182] The body part (732) is provided with a return spring (770).

[0183] A pinhole (733) into which a guide pin (760) is inserted is formed in the body portion (732). It is preferable that the pinhole (733) is formed in a direction perpendicular to the longitudinal direction of the interlock pin (730). It is preferable that the pinhole (733) is formed in a horizontal direction.

[0184] The leg portion (734) is formed between the body portion (732) and the restraint portion (735). The diameter of the leg portion (734) is formed smaller than the diameter of the restraint portion (735). The leg portion (734) is arranged on the inside of the extension bracket (740). When the interlock pin (730) is forced and moves inward (toward the portion where the circuit breaker is installed), the leg portion (734) is placed on the restraint hole (725) of the sliding plate (720). When the sliding plate (720) rises, the leg portion (734) is placed on the sliding portion (726).

[0185] A restraint (735) is provided at the end of the interlock pin (730). The restraint (735) restrains the movement of the sliding plate (720). The diameter of the restraint (735) is formed to be larger than the diameter of the leg portion (734). The diameter of the restraint (735) is formed to be smaller than the diameter of the restraint hole (725) and larger than the width of the sliding portion (726). When the interlock pin (730) is not subjected to an external force, the restraint (735) is positioned within the restraint hole (725) to restrain the movement of the sliding plate (720), and when the interlock pin (730) is moved inward by the force of the interlock pin pressing portion (260), the restraint (735) leaves the restraint hole (725) and does not restrain the movement of the sliding plate (720).

[0186] An extension bracket (740) is provided. The extension bracket (740) is provided to support the interlock pin (730). The extension bracket (740) is formed to protrude forward from the fixed bracket (710).

[0187] The extension bracket (740) includes a front portion (741), a side portion (742), and a connecting portion (743). The front portion (741) is a portion spaced apart from the fixed bracket (710) by a predetermined distance, the side portion (742) is a portion connecting the front portion and the connecting portion, and the connecting portion (743) is a portion connected to the fixed bracket (710).

[0188] A through hole (745) into which an interlock pin (730) is inserted is formed in the front part (741) of the extension bracket (740).

[0189] A guide hole (746) is formed on the side (742) of the extension bracket (740) through which a guide pin (760) can move. The guide hole (746) is formed as a horizontal hole. The guide hole (746) enables movement of the guide pin (760) when the interlock pin (730) moves.

[0190] A fastening member (747) is provided at the joint portion (743) of the extension bracket (740) and is fastened to the fixed bracket (710).

[0191] A support member (750) is provided. The support member (750) is positioned on the front or rear side of the front part (741) of the extension bracket (740). The support member (750) may also be formed integrally with the extension bracket (740).

[0192] The support member (750) is formed in a tubular shape and the body part (732) of the interlock pin (730) is inserted into it. The support member (750) supports the interlock pin (730).

[0193] A guide pin (760) is provided. The guide pin (760) guides the movement of the interlock pin (730). The guide pin (760) is arranged in a direction perpendicular to the interlock pin (730). The guide pin (760) is arranged in a horizontal direction. The guide pin (760) is inserted and installed into the guide hole (746) of the extension bracket (740). The guide pin (760) is inserted into the pin hole (733) of the interlock pin (730) and moves together with the interlock pin (730).

[0194] The guide pin (760) sets the movement limit of the interlock pin (730). That is, when the interlock pin (730) moves forward, the guide pin (760) touches the front end of the guide hole (746) to set the forward movement limit, and when the interlock pin (730) moves backward, the guide pin (760) touches the rear end of the guide hole (746) to set the rear movement limit.

[0195] A washer (762) and a key (764) are provided to fix the guide pin (760) and provide clearance.

[0196] A return spring (770) is provided. The return spring (770) is provided in the body (732) of the interlock pin (730). The return spring (770) is supported by the head (731) of the interlock pin (730) and the support member (750). The return spring (770) provides elastic force to move the interlock pin (730) toward the front. When the interlock pin (730) moves rearward, the return spring (770) stores elastic force, and when the force applied to the interlock pin (730) is removed, the return spring (770) pushes the interlock pin (730) to return it forward.

[0197] With further reference to FIGS. 15 and 16, the operation of the secondary circuit input interlock device (700) according to one embodiment of the present invention will be described.

[0198] First, let's examine the state in which the second compartment door (250) of the second compartment (210) is open. Refer to FIGS. 10 to 13 and FIG. 17.

[0199] Since the second compartment door (250) is open, the interlock pin pressurization portion (260) is separated from the interlock pin (730). At this time, the switch lever (660) of the wiring circuit breaker (650) is in the off state.

[0200] The interlock pin (730) is in a state where it protrudes forward under the force of the return spring (770). The restraint portion (735) of the interlock pin (730) is placed in the restraint hole (725) of the sliding plate (720). Since the restraint portion (735) of the interlock pin (730) is fitted into the restraint hole (725) of the sliding plate (720), the interlock pin (730) prevents the up-and-down movement of the sliding plate (720).

[0201] Since the operating lever (695) of the circuit breaker (650) is connected to the sliding plate (720) via the plate pressurizing member (705), the operating lever (695) cannot be rotated to the On position. That is, when the second compartment door (250) is open, the closing action of the circuit breaker (650) is restricted, thus preventing the secondary circuit from being closed.

[0202] Next, let's examine the state in which the second compartment door (250) is closed. Refer to Fig. 15.

[0203] When the second compartment door (250) is closed, the interlock pin pressurizing portion (260) contacts the interlock pin (730) and pushes the interlock pin (730) backward. At this time, the switch lever (660) of the wiring circuit breaker (650) is in the off state.

[0204] The interlock pin (730) overcomes the force of the return spring (770) and moves backward. The return spring (770) stores elasticity. As the interlock pin (730) moves backward, the restraining portion (735) of the interlock pin (730) is released from the restraining hole (725) of the sliding plate (720). When the restraining portion (735) of the interlock pin (730) is released from the restraining hole (725) of the sliding plate (720), the interlock pin (730) cannot restrain the up-and-down movement of the sliding plate (720), and the sliding plate (720) is in a state where the up-and-down movement is possible.

[0205] The operating lever (695) of the circuit breaker (650) for wiring is connected to the sliding plate (720) via the plate pressurizing member (705), so that the operating lever (695) can be rotated to the On position. That is, since the closing operation of the circuit breaker (650) is permitted when the second compartment door (250) is closed, the secondary circuit can be closed.

[0206] Next, let's examine the state in which the wiring circuit breaker (650) is turned on while the second compartment door (250) is closed. Refer to Fig. 16.

[0207] When the remote lever (692) of the remote operation handle (690) is raised, the cable (693) is pulled, and the operation lever (695) rotates about the lever shaft (672). Since the operation lever (695) is fixed to the sliding plate (720) through the plate pressurizing member (705), the sliding plate (720) also moves upward. When the sliding plate (720) moves upward, the leg portion (734) of the interlock pin (730) relatively slides along the sliding portion (726) of the sliding plate (720). When the switch lever (660) of the circuit breaker (650) is rotated to the On state by the rotation of the operation lever (695), the secondary circuit is turned on.

[0208] According to a distribution board having an interlock device according to the present invention, an interlock device is provided in a transformer panel having a fuse dummy compartment and an instrument transformer compartment to link a door of an instrument transformer compartment with a switch lever of a wiring circuit breaker, so that when the door of the instrument transformer compartment is open, the wiring circuit breaker cannot be turned on, thereby preventing a secondary circuit flowing to a load from being turned on.

[0209] Therefore, it prevents safety accidents and meets legal requirements.

[0210] 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.

[0211] [Explanation of symbols]

[0212] 100 transformer panels

[0213] 110 First compartment

[0214] 120,125 Terminal 1

[0215] 130 Rail section of compartment 1

[0216] 140 shutter assembly

[0217] 150 Compartment 1 door

[0218] 160 Transport device section

[0219] 210 Second compartment

[0220] 225 Terminal 2

[0221] 227 Second compartment bus bar

[0222] 230 Rail section of compartment 1

[0223] 240 Transformer Transfer Unit

[0224] 250 Second compartment door

[0225] 260 interlock pin pressurized section

[0226] 310 Mothership Room

[0227] 360 cable room

[0228] 500 fuse bogie

[0229] 510 Terminal 1

[0230] 520 Terminal 2

[0231] 530 fuse

[0232] 540 Fuse Cart Transfer Unit

[0233] 600 instrument transformer

[0234] 650 wiring circuit breaker

[0235] 660 switch lever

[0236] 690 remote control handle

[0237] 692 Remote Lever

[0238] 693 cable

[0239] 695 operating lever

[0240] 700 Secondary Circuit Input Interlock Device

[0241] 705 plate pressurized ball

[0242] 710 fixed bracket

[0243] 713 Pressure ball action hole

[0244] 715 pin insertion hole

[0245] 720 sliding plate

[0246] 722 Sliding fastening member

[0247] 723 insertion hole

[0248] 725 Restraint Hall

[0249] 730 interlock pin

[0250] 735 Restraints

[0251] 740 extension bracket

[0252] 750 support zone

[0253] 760 guide pin

[0254] 770 return spring

Claims

1. A room where power equipment is installed; A circuit breaker installed in the above compartment and electrically connected to the power equipment; A sliding plate installed so as to be able to slide on one side of the circuit breaker, and to which a switch lever of the circuit breaker is coupled; and A distribution board having a secondary circuit entry interlock device including an interlock pin installed so as to intersect the sliding plate and restraining or allowing movement of the sliding plate depending on contact or separation of the compartment door.

2. In paragraph 1, A distribution board having a secondary circuit injection interlock device, characterized in that the interlock pin is arranged to move in a direction crossing the direction of movement of the sliding plate.

3. In paragraph 1, A distribution board having a secondary circuit input interlock device, characterized in that it further includes a fixed bracket installed in the above compartment and to which the sliding plate is slidably coupled.

4. In paragraph 3, A distribution board having a secondary circuit input interlock device, characterized in that a sliding hole for guiding the movement of the sliding plate is formed in the above-mentioned fixed bracket.

5. In paragraph 4, A distribution board having a secondary circuit input interlock device, characterized in that a sliding fastening member fastened to the sliding plate is inserted into the sliding hole.

6. In paragraph 3, A distribution board having a secondary circuit input interlock device, characterized in that it is provided with a plate pressurizing member connected to the switch lever of the circuit breaker and engaged with the fitting hole of the sliding plate.

7. In paragraph 6, A distribution board having a secondary circuit injection interlock device, characterized in that a pressurizing member operating hole is formed in the above-mentioned fixed bracket to provide a space in which the plate pressurizing member can operate.

8. In paragraph 3, A distribution board having a secondary circuit input interlock device, characterized in that a pin insertion hole into which the interlock pin is inserted is formed in the above-mentioned fixed bracket.

9. In paragraph 1, A distribution board having a secondary circuit input interlock device, characterized in that a restraining hole into which the interlock pin is inserted is formed in the sliding plate.

10. In paragraph 9, A distribution board having a secondary circuit input interlock device, characterized in that a sliding portion having a width smaller than the diameter of the restraint hole is extended to the lower portion of the restraint hole.

11. In paragraph 9, A distribution board having a secondary circuit input interlock device, characterized in that the sliding plate has interference prevention holes formed on the left and right sides of the restraint hole.

12. In paragraph 3, A distribution board having a secondary circuit input interlock device, characterized in that a pinhole is formed in the interlock pin into which a guide pin for guiding the movement of the interlock pin is inserted.

13. In paragraph 10, The above interlock pin is, A restraint portion that restrains the movement of the sliding plate when inserted into the restraint hole; A distribution board having a secondary circuit insertion interlock device, characterized in that it has a leg portion formed with a diameter smaller than the diameter of the above-mentioned restraint portion and capable of being inserted into the above-mentioned sliding portion.

14. In paragraph 12, A distribution board having a secondary circuit injection interlock device, characterized in that it further includes an extension bracket fixed to the front of the fixed bracket and supporting the interlock pin.

15. In paragraph 14, A distribution board having a secondary circuit input interlock device, characterized in that a guide hole for guiding the movement of the guide pin is formed on the side of the extension bracket.

16. In paragraph 14, A distribution board having a secondary circuit input interlock device, characterized in that the extension bracket is provided with a support member for supporting the interlock pin.

17. In paragraph 1, A distribution board having a secondary circuit closing interlock device, characterized in that the interlock pin is provided with a return spring.

18. In paragraph 1, A distribution board having a secondary circuit injection interlock device, characterized in that an interlock pin pressurizing portion is provided that is fixed to the rear of the compartment door and pressurizes the interlock pin when the second compartment door is closed.

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