Draw-in / out interlock device of circuit breaker

Abstract

The present invention relates to a draw-in / out interlock device of a circuit breaker, and more specifically to a draw-in / out interlock device of a circuit breaker, for removing the formation of a gap inside the draw-in / out interlock device, thereby enabling the stable operation of the draw-in / out interlock device. According to the circuit breaker according to one embodiment of the present invention, a connection rod is provided to an interlock rod of the draw-in / out interlock device, and thus the spacing between same and an interlock plate may be adjusted. Thus, when a gap forms between the connection rod and the interlock plate, the gap may be removed by adjusting the connection rod.

Description

Circuit breaker draw-out interlock device

[0001] The present invention relates to a circuit breaker's entry / exit interlock device, and more specifically, to a circuit breaker's entry / exit interlock device that eliminates the occurrence of a gap inside the circuit breaker's entry / exit interlock device, thereby enabling the circuit breaker to operate stably.

[0002] Typically, a circuit breaker in a distribution panel is a device that selectively turns the line between the power source and the load on and off, and cuts off the line in the event of overload, short circuit, current leakage, or electric shock. Circuit breakers are installed together with distribution panels that contain and manage various electrical devices, including circuit breakers, for the operation or control of power plants and substations, and the operation of motors. They are typically housed and used inside a cradle fixed to the distribution panel.

[0003] Inside the distribution board, the circuit breaker has a connected position where the bus and load terminals are connected to the bus or load terminals of the cradle and voltage and current are supplied, a test position where the circuit breaker can only be operated by disconnecting it from the terminals of the cradle, and a disconnect position where the circuit breaker can be separated from the cradle.

[0004] Here, the action of pushing in to connect to the cradle bus bar of the circuit breaker is called insertion, and the action of pulling out is called withdrawal. In the run and test positions, an electrical signal by the control power is transmitted to the circuit breaker to cause the circuit breaker to turn on and off, and control power is supplied to the circuit breaker to cause this operation.

[0005] In general, circuit breakers within a distribution panel must have basic interlocking functions in each position. (This includes: no pull-in operation when the circuit breaker is closed (On) in the test position; no pull-in operation when the circuit breaker is closed (On) in the draw-in position; and no pull-out operation when the circuit breaker is closed (On) in the operating position.)

[0006] The above interlock operations are fundamentally required functions for circuit breakers, and are a configuration that must not be omitted in the insertion and withdrawal operation of the distribution board circuit breaker. Maintenance of the interlock function must also be easy.

[0007] Figures 1 through 3 are perspective views of a distribution box and a circuit breaker. They show the location of the circuit breaker within the distribution box. Figure 1 shows the disconnected position, Figure 2 shows the test position, and Figure 3 shows the connected position.

[0008] The circuit breaker (10) is divided into an operating position (connected position) in which the bus terminal (34) and the load terminal (35) are connected to the bus terminal (54) and the load terminal (55) of the cradle (50) and voltage and current are supplied, a test position (test position) in which the terminal of the circuit breaker is separated from the terminal of the cradle and only the operation test of the breaker is possible, and a disconnected position in which the breaker can be separated outside the cradle.

[0009] The front cover (11) of the circuit breaker (10) is provided with an input button (12) and an open button (13).

[0010] At the bottom of the circuit breaker (10), a truck section (20) is provided that can move along the rail (58) of the cradle (50).

[0011] The cradle (50) is provided with a transport device (60) that can move the truck section (20) at the bottom.

[0012] The transport device (60) is equipped with a guide block (65) that guides the input / output interlock device.

[0013] Figure 4 is a perspective view of a circuit breaker, and Figure 5 shows Figure 4 with the cover removed. The interlock lever is shown. Meanwhile, Figure 6 shows the interlock lever in a raised position.

[0014] A main circuit section (30) is provided at the rear of the circuit breaker (10).

[0015] The mechanism (40) is provided to connect or disconnect the main circuit (30).

[0016] A pull-in / out interlock device is provided in the truck section (20).

[0017] The pull-out interlock device includes an interlock lever (21), a pull-out lifting mechanism (22), an interlock plate (25), and an interlock pin (26).

[0018] The interlock lever (21) moves up and down.

[0019] The interlock lever (21) is connected to the interlock plate (25), and an interlock pin (26) is provided on the upper surface of the interlock plate (25). When the interlock lever (21) operates, the interlock plate (25) and the interlock pin (26) operate together.

[0020] The interlock pin (26) moves up and down, and the stroke range is designed to be operated by the interlock lever (21). Fig. 7 shows a perspective view of the interlock pin (26).

[0021] According to the constant stroke operation of the interlock pin (26), the spring energy (input spring / pressure spring) of the circuit breaker is restored and released, and the circuit breaker is released from the interlock state.

[0022] As shown in FIGS. 5 and 6, the circuit breaker is driven by the linked operation of interlock lever (21) -> interlock plate (25) -> interlock pin (26), and in order to implement a certain stroke of the interlock pin (26), the interlock pin (26) must be maintained in contact with the upper surface of the interlock plate (25).

[0023] Figure 8 shows a state in which an interlock pin is detached from the interlock plate and a gap is created.

[0024] In a normal assembled state, the interlock pin implements a normal stroke according to the interlock lever operation. However, if the interlock plate (25) and the interlock pin (26) are separated from each other as shown in Fig. 8, the interlock pin (26) does not move within the normal stroke range. Therefore, an insertion / withdrawal operation error occurs.

[0025] In the case of conventional technology, once the interlock pin is assembled, full maintenance is impossible. However, in abnormal situations, the interlock plate (25) and the interlock pin (26) may become separated from each other due to tolerances between circuit breaker components, assembly tolerances between components within the distribution box, or deformation during use. In this case, if the circuit breaker is moved to the operating position within the distribution box without releasing its spring energy, an electrical accident may occur.

[0026] The present invention has been devised to solve the above-mentioned problems, and its purpose is to provide a circuit breaker that eliminates the occurrence of a gap inside an input / output interlock device, thereby enabling the interlock device to operate stably.

[0027] According to one embodiment of the present invention, a circuit breaker draw-out interlock device includes: a cradle; a truck portion inserted into the cradle and moving forward and backward; an interlock lever installed on the bottom of the truck portion to be capable of moving up and down, the interlock lever moving up and down while moving along an interlock guide block of the cradle; an elevating member installed on the bottom portion, positioned on an upper portion of the interlock lever, and moving up and down in conjunction with the interlock lever; an interlock plate coupled to an upper portion of the elevating member; and an interlock rod assembly disposed on an upper portion of the interlock plate and moving up and down together with the interlock plate, wherein the interlock rod assembly includes: an interlock rod that moves up and down; and an extension rod that is connected to a lower portion of the interlock rod and extends to contact the interlock plate.

[0028] Here, a fastening groove is formed at the lower end of the interlock rod to which the extension rod is coupled.

[0029] Additionally, the extension rod is screwed into the fastening groove.

[0030] Additionally, the interlock rod assembly further includes a return spring that provides a downward force to the interlock rod.

[0031] Additionally, the interlock rod assembly further includes a spring pin that is installed penetrating the interlock rod and supports the lower end of the return spring.

[0032] In addition, the interlock rod is installed through the upper surface of the truck section and is connected to an interlock connection plate that operates the opening / closing mechanism.

[0033] Additionally, a fixing member is provided between the interlock load and the extension load.

[0034] Additionally, the above fixing member includes a nut and a washer.

[0035] In addition, the interlock lever is axially coupled to the frame of the truck section by the interlock lever shaft and rotates up and down.

[0036] And, the elevating member includes an elevating member rod that moves up and down, an elevating member bracket that is fixed to a frame portion of the truck section and into which the elevating member rod is inserted, an elevating pin that is connected to the elevating member rod and the elevating member bracket to set a limit of the elevating movement, and a pressure spring that provides downward pressure to the elevating member rod.

[0037] According to one embodiment of the present invention, a circuit breaker is provided with a connecting rod on the interlock rod of the draw-out interlock device, thereby adjusting the gap with the interlock plate. Accordingly, if a gap occurs between the connecting rod and the interlock plate, the gap can be eliminated by adjusting the connecting rod.

[0038] Accordingly, the interlock device operates smoothly and no malfunction occurs.

[0039] In other words, the present invention enables maintenance of a draw-out interlock device of a distribution panel circuit breaker.

[0040] Regarding the interlock pin drive by the interlock lever of the circuit breaker, it enables full maintenance in abnormal situations and prevents electrical accidents when moving to the operating position within the distribution box.

[0041] That is, according to the front maintenance structure of the interlock pin assay, adjustment of the interlock pin stroke in the field is possible, thereby ensuring user safety and preventing safety accidents.

[0042] Figures 1 to 3 are perspective views of a distribution box and a circuit breaker according to the prior art. They show the operating states. Figure 1 shows the disconnected position, Figure 2 shows the test position, and Figure 3 shows the connected position.

[0043] Figure 4 is a perspective view of a circuit breaker.

[0044] Figure 5 shows the cover removed from Figure 4. The interlock lever is shown.

[0045] Figure 6 shows the state after the interlock operation in Figure 5.

[0046] Figure 7 is a perspective view of the interlock lever in Figure 5.

[0047] Figure 8 shows the state in which the interlock pin is opened in Figure 5.

[0048] Figures 9 to 11 are perspective views of a circuit breaker room of a distribution panel according to one embodiment of the present invention. They illustrate the operating states of the circuit breaker. Figure 9 illustrates the disconnected position, Figure 10 illustrates the test position, and Figure 11 illustrates the connected position.

[0049] Figure 12 is a perspective view of a circuit breaker according to one embodiment of the present invention.

[0050] Figure 13 shows the front cover of Figure 12 with the cover removed.

[0051] Fig. 14 is an enlarged perspective view of the pull-out interlock device portion in Fig. 13.

[0052] Fig. 15 is a front view of Fig. 13 with the mechanism removed.

[0053] Fig. 16 is a perspective view of a truck section of a circuit breaker according to one embodiment of the present invention.

[0054] Fig. 17 is a perspective view of a circuit breaker's pull-out interlock device according to one embodiment of the present invention.

[0055] Fig. 18 is a perspective view of an interlock rod assembly of a circuit breaker's draw-out interlock device according to one embodiment of the present invention, and Fig. 19 is an exploded perspective view of the interlock rod assembly.

[0056] 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.

[0057] 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.

[0058] Figures 9 to 11 are perspective views of a circuit breaker room of a distribution panel according to one embodiment of the present invention. They show the operating states of the circuit breaker. Figure 9 shows the disconnected position, Figure 10 shows the test position, and Figure 11 shows the connected position. Figure 12 is a perspective view of a circuit breaker according to one embodiment of the present invention. Figure 13 shows the front cover of Figure 12 with it removed. Referring to the drawings, a detailed description will be given of the draw-out interlock device of the circuit breaker according to each embodiment of the present invention.

[0059] According to one embodiment of the present invention, a circuit breaker draw-out interlock device includes: a cradle (200); a truck portion (150) inserted into the cradle (200) and moving forward and backward; an interlock lever (160) installed in a frame portion (151) of the truck portion (150) so as to be able to move up and down, and moving up and down while moving along an interlock guide block (265) of the cradle (200); an elevating member (170) installed in the frame portion (151), positioned above the interlock lever (160), and moving up and down in conjunction with the interlock lever (160); an interlock plate (180) coupled to an upper portion of the elevating member (170); and an interlock rod assembly (190) positioned above the interlock plate (180) and moving up and down together with the interlock plate (180), wherein the interlock rod assembly (190) comprises: an interlock rod (191) that moves up and down; And it includes an extension rod (193) that is connected to the lower end of the interlock rod (191) and extends to contact the interlock plate (180).

[0060] First, the cradle (200) of the distribution panel will be described. Refer to FIGS. 9 to 11.

[0061] The cradle (200) forms part of a distribution panel or distribution box. The cradle (200) may be a compartment of the distribution panel or distribution box. In this case, the cradle (200) is also referred to as a circuit breaker room.

[0062] The cradle (200) is provided in the form of a cabinet or a box. For ease of understanding, the front and one side panel are shown removed. Terminal bushings (210) are installed on the rear panel of the cradle (200) for each phase. The terminal bushings (210) may be provided as a pair of upper and lower terminal bushings for each phase. The terminal bushings (210) are formed of an insulating material to protect and electrically shield the cradle terminals (214, 215).

[0063] The cradle terminals (214, 215) electrically connect the circuit breaker (100) to a power source or a load. The cradle terminals (214, 215) are composed of a cradle power side terminal (214) connected to the power source and a cradle load side terminal (215) connected to the load. The cradle power side terminal (214) may be positioned at the top, and the cradle load side terminal (215) may be positioned at the bottom. The cradle terminals (214, 215) are provided for each phase.

[0064] A transport device (260) capable of moving a circuit breaker (100) forward and backward is provided at the bottom of the cradle (200). An interlock guide block (265) is installed in the transport device (260) along the forward and backward directions.

[0065] A rail section (250) is provided on the lower side of the cradle (200). As the transport wheel (152) of the truck section (150) of the circuit breaker (100) moves along the rail section (250), the circuit breaker (100) moves forward and backward within the cradle (200).

[0066] A circuit breaker (100) is inserted and installed in a cradle (200). Fig. 12 shows a perspective view of the circuit breaker (100).

[0067] A circuit breaker (100) includes a switching mechanism (120) surrounded by a case (110), a main circuit (130) that is energized or interrupted by the switching mechanism (120), and a truck (150) that is positioned at the bottom and is movable.

[0068] The circuit breaker (100) changes position as it is inserted or pulled out within the cradle (200).

[0069] The main positions where the circuit breaker (100) stops within the cradle (200) are as follows: a connected position (service position) where the bus terminal (134) and the load terminal (135) of the circuit breaker (100) are connected to the power terminal (214) and the cradle load terminal (215) of the cradle (200) to supply voltage and current; a test position (test position) where the bus terminal (134) and the load terminal (135) of the circuit breaker (100) are separated from the terminals (214, 215) of the cradle (200) to enable only an operation test of the circuit breaker (100); and a disconnect position where the circuit breaker (100) can be separated outside the cradle (200).

[0070] Among the cases (110) of the circuit breaker (100), the front cover (111) is provided with an input button (112) and an open button (113). In addition, the front cover (111) is provided with a handle (114) that allows the user to hold and move it by hand.

[0071] At the bottom of the circuit breaker (100), a truck section (150) is provided that can move along the rail section (250) of the cradle (200). The truck section (150) is provided with transport wheels (152) on both sides so that it can move along the rail section (250) of the cradle (200).

[0072] A circuit breaker (100) is provided with a main circuit section (130) that is connected to the main circuit for each phase and can energize or cut off the circuit. Among circuit breakers, a vacuum circuit breaker or the like can be used as the main circuit section for a circuit breaker installed in a high-voltage power system. A vacuum circuit breaker protects human life and load equipment by cutting off the circuit in a vacuum arc manner at a vacuum interrupter (VI) inside the circuit breaker by an external separate relay when an abnormal current such as an overcurrent, short circuit, or ground fault occurs in an extra-high-voltage / high-voltage distribution line.

[0073] A main circuit section (130) is provided for each phase. The main circuit section (130) is equipped with fixed contacts and movable contacts. A vacuum interrupter may be applied to the main circuit section (130) applied to a high-voltage circuit. Fixed contacts and movable contacts are provided inside the vacuum interrupter.

[0074] A circuit breaker (100) is provided with a mechanism (120). The mechanism (120) provides power to move a movable contact to open or close a circuit, and an on button (112) and an off button (113) are exposed externally for a user to operate. The user can operate the on button (112) and the off button (113) to close or close the circuit breaker.

[0075] Fig. 13 shows the front cover (111) of the circuit breaker (100) removed to reveal the opening / closing mechanism (120). Fig. 14 is an enlarged perspective view of the drawer / withdrawal interlock device portion of Fig. 13. Fig. 15 is a front view of Fig. 13 with the mechanism assembly removed.

[0076] The opening mechanism (120) is charged by the control power to charge the closing spring (125), and when restored by the closing button (112), the driving lever (118) is operated to operate the movable part of the main circuit (130). Meanwhile, for safety, the energy of the closing spring (125) must be released during the insertion and withdrawal movement of the circuit breaker (100) within the cradle (200) to prevent unexpected accidents.

[0077] The draw-in / out interlock device will be described. The draw-in / out interlock device is provided to release the energy of the closing spring (125) during the draw-in / out movement of the circuit breaker (100), and to restrict the draw-in / out movement if the draw-in spring energy is not released.

[0078] An interlock guide block (265) is installed in the front-back direction on the bottom part (205) of the cradle (200). A groove is formed on the interlock guide block (265), and an interlock lever (160) that moves in contact with the groove moves up and down.

[0079] Fig. 16 is a perspective view of a truck section of a circuit breaker according to one embodiment of the present invention, and Fig. 17 is a perspective view of a draw-out interlock device of a circuit breaker according to one embodiment of the present invention.

[0080] The interlock lever (160) is provided to be able to move up and down in conjunction with the interlock guide block (265). The interlock lever (160) is installed to be able to move up and down on the frame portion (151) of the truck portion (150) of the circuit breaker (100). Strictly speaking, the interlock lever (160) is rotatably connected to the frame portion (151) of the truck portion (150).

[0081] The interlock lever (160) may be composed of an interlock lever body (161, 162), an interlock lever pin (163), and an interlock lever shaft (165).

[0082] The interlock lever (160) is axially coupled to the frame portion (151) of the truck portion (150) by the interlock lever shaft portion (165) and is capable of vertical rotation. The interlock lever pin portion (163) moves up and down while moving along the interlock guide block (265) of the bottom portion (205) of the cradle (200).

[0083] An elevating member (170) is provided. The elevating member (170) is provided to elevate and lower in conjunction with an interlock lever (160).

[0084] The lifting member (170) includes an lifting member rod (171) that moves up and down, an lifting member bracket (173) that is fixed to the frame portion (151) of the truck portion (150) and into which the lifting member rod (171) is inserted, an lifting pin (176) that is connected to the lifting member rod (171) and the lifting member bracket (173) to set a limit of the lifting movement, and a covering (178) and a pressure spring (179) that cover and guide the lifting member rod (171).

[0085] The lifting member load (171) has a step formed in the middle to support one end of the pressure spring (179).

[0086] An elevator pin hole (172) into which an elevator pin (176) is inserted is formed at the lower part of the step portion of the elevator member rod (171).

[0087] The lifting member bracket (173) is fixedly installed on the frame part (151) of the truck part (150).

[0088] The lifting member bracket (173) has an lifting pin (176) inserted into the side and an operating hole (174) formed to allow for up and down movement.

[0089] A through hole (175) through which the lifting member rod (171) and covering (178) pass is formed on the upper surface of the lifting member bracket (173).

[0090] The lifting pin (176) is inserted into the operating hole (174) of the lifting member bracket (173) and the lifting pin hole (172) of the lifting member rod (171). The lifting pin (176) moves up and down along the operating hole (174) together with the lifting member rod (171).

[0091] The lifting pin (176) is pressed downward by the force of the pressure spring (179) and comes into contact with the interlock lever (160). Therefore, the lifting pin (176) moves in conjunction with the interlock lever (160).

[0092] The covering (178) is fixedly installed in the through hole (175) of the lifting member bracket (173). The covering (178) wraps around the lifting member rod (171) to guide the up and down movement of the lifting member rod (171) and support the lifting member rod (171).

[0093] An interlock plate (180) is attached to the upper end of the lifting member rod (171). The interlock plate (180) moves up and down together with the lifting member rod (171). When the interlock lever (160) moves up and down, the pressure spring (179) is compressed or extended, causing the lifting pin (176) in contact with the interlock lever (160) to move up and down, and accordingly, the lifting member rod (171) moves up and down, and the interlock plate (180) also moves up and down. When the interlock lever (160) moves up and down, the lifting pin (176), the lifting member rod (171), and the interlock plate (180) move up and down in conjunction with this.

[0094] An interlock rod assembly (190) is provided that moves in conjunction with the movement of the interlock plate (180) and transmits it to the interlock connection plate (127) of the opening / closing mechanism (120).

[0095] Fig. 18 is a perspective view of an interlock rod assembly of a circuit breaker's draw-out interlock device according to one embodiment of the present invention, and Fig. 19 is an exploded perspective view of the interlock rod assembly.

[0096] The above interlock rod assembly (190) includes an interlock rod (191) installed to move up and down on the truck section (150); a return spring (197) providing a restoring force acting downward on the interlock rod (191); and an extension rod (193) connected to the lower end of the interlock rod (191) and extending to contact the interlock plate (180).

[0097] The interlock rod (191) is installed penetrating the upper surface (155) of the truck section (150). The interlock rod (191) may be configured as a circular rod, etc.

[0098] The interlock rod (191) has a fastening groove (192) formed at the lower end. The fastening groove (192) may be formed as a screw groove. An extension rod (193) is coupled to the fastening groove (192). The interlock rod (191) and the extension rod (193) are coupled by screw coupling.

[0099] The lower part of the interlock rod (191) is in contact with the interlock plate (180) through the extension rod (193), and the upper part of the interlock rod (191) is connected to the on-off connection plate.

[0100] The interlock rod (191) is equipped with a spring pin (195). The spring pin (195) is inserted and installed into the pin hole (194) of the interlock rod (191). The spring pin (195) is installed transversely through the interlock rod (191) to support the lower end of the return spring (197).

[0101] A retaining ring (196) may be provided between the spring pin (195) and the return spring (197). The return spring (197) is supported more stably and transmits force through the retaining ring (196).

[0102] A return spring (197) is provided between the upper surface (155) of the truck section (150) and the spring pin (195) of the interlock rod (191). The return spring (197) is installed in a compressed state and exerts force in an extending direction. That is, the return spring (197) applies a downward force to the interlock rod (191). Accordingly, the interlock rod assembly (190) receives a downward force and maintains a state of contact with the interlock plate (180).

[0103] In order to prevent a gap from occurring between the interlock rod (191) and the interlock plate (180), an extension rod (193) is provided. The extension rod (193) is coupled to the interlock rod (191). The extension rod (193) is connected to the interlock rod (191) in a longitudinally extendable or contractible manner. For example, the extension rod (193) is configured as a bolt and is connected to the interlock rod (191) in a longitudinally extendable or contractible manner by tightening or loosening a screw.

[0104] A fixing member (198, 199) is provided between the interlock rod (191) and the extension rod (193). Such fixing members may include nuts and washers. The fixing members (198, 199) are provided to fix the rotating extension rod (193).

[0105] The extension rod (193) is placed in contact with the interlock plate (180). The extension rod (193) is installed so that it is extended to the maximum extent so that no gap occurs between the interlock rod assembly (190) and the interlock plate (180). If a gap occurs between the interlock rod assembly (190) and the interlock plate (180) during use, the user adjusts the extension rod (193) longitudinally to eliminate the gap.

[0106] According to one embodiment of the present invention, a circuit breaker is provided with a connecting rod on the interlock rod of the draw-out interlock device, thereby adjusting the gap with the interlock plate. Accordingly, if a gap occurs between the connecting rod and the interlock plate, the gap can be eliminated by adjusting the connecting rod.

[0107] Accordingly, the interlock device operates smoothly and no malfunction occurs.

[0108] In other words, the present invention enables maintenance of a draw-out interlock device of a distribution panel circuit breaker.

[0109] Regarding the interlock pin drive by the interlock lever of the circuit breaker, it enables full maintenance in abnormal situations and prevents electrical accidents when moving to the operating position within the distribution box.

[0110] That is, according to the front maintenance structure of the interlock pin assay, adjustment of the interlock pin stroke in the field is possible, thereby ensuring user safety and preventing safety accidents.

[0111] 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.

[0112] [Explanation of symbols]

[0113] 100 circuit breakers

[0114] 110 cases

[0115] 120 Switching mechanism

[0116] 125 plunge spring

[0117] 127 Interlock Connection Plate

[0118] 130 Main Circuit

[0119] 150 Truck Division

[0120] 160 interlock lever

[0121] 170 Lift Absence

[0122] 171 Lifting member load

[0123] 172 Lifting Pinhole

[0124] 173 Lifting member bracket

[0125] 176 Lifting Pins

[0126] 178 Covering

[0127] 179 Pressurized spring

[0128] 180 interlock plate

[0129] 190 Interlock Load Assembly

[0130] 191 Interlock Road

[0131] 193 extension rod

[0132] 195 spring pin

[0133] 197 Return Spring

[0134] 198,199 fixed members

[0135] 200 Cradle

[0136] 260 Transport Unit

[0137] 265 Interlock Guide Block

Claims

1. Cradle; A truck part that is inserted into the above cradle and moves forward and backward; An interlock lever installed on the bottom of the above truck section so as to be able to move up and down while moving along the interlock guide block of the above cradle; An elevating member installed on the floor above and positioned above the interlock lever to elevate and lower in conjunction with the interlock lever; An interlock plate coupled to the upper portion of the above lifting member; and An interlock rod assembly is disposed on the upper portion of the interlock plate and moves up and down together with the interlock plate. The above interlock load assembly, Interlock rods with elevating motion; and A circuit breaker draw-out interlock device comprising an extension rod connected to the lower end of the interlock rod and extending to contact the interlock plate.

2. A circuit breaker draw-out interlock device in accordance with paragraph 1, wherein a fastening groove is formed at the lower end of the interlock load to which the extension load is coupled.

3. In the second paragraph, the extension rod is a circuit breaker's draw-in / out interlock device that is screw-connected to the fastening groove.

4. A circuit breaker draw-out interlock device in accordance with claim 1, wherein the interlock rod assembly further includes a return spring that provides a downward force to the interlock rod.

5. A circuit breaker draw-out interlock device in the fourth paragraph, wherein the interlock rod assembly further includes a spring pin that is installed through the interlock rod and supports the lower end of the return spring.

6. In the first paragraph, the interlock rod is a circuit breaker's draw-in / out interlock device that is installed through the upper surface of the truck section and is connected to an interlock connection plate that operates the opening / closing mechanism.

7. A circuit breaker draw-in / out interlock device in accordance with paragraph 1, wherein a fixing member is provided between the interlock load and the extension load.

8. A circuit breaker draw-out interlock device including a nut and a washer as the fixing member in paragraph 7.

9. In the first paragraph, the interlock lever is a circuit breaker draw-in / out interlock device that is axially connected to the frame of the truck section by the interlock lever shaft and performs an up-and-down rotational movement.

10. A circuit breaker draw-out interlock device in the first paragraph, wherein the elevating member comprises an elevating member rod that moves up and down, an elevating member bracket that is fixed to the frame of the truck section and into which the elevating member rod is inserted, an elevating pin that is connected to the elevating member rod and the elevating member bracket to set a limit of the elevating movement, and a pressure spring that provides downward pressure to the elevating member rod.

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