Auxiliary Contact of Circuit Breaker

Abstract

The present invention relates to an auxiliary contact mechanism of a circuit breaker, and more specifically, to an auxiliary contact mechanism of a circuit breaker having parallel contacts. According to an auxiliary contact mechanism of a circuit breaker according to one embodiment of the present invention, a parallel auxiliary contact assembly is provided, and the number of auxiliary contacts is expanded.

Description

Technology Field

[0001] The present invention relates to an auxiliary contact mechanism of a circuit breaker, and more specifically, to an auxiliary contact mechanism of a circuit breaker having parallel contacts. Background Technology

[0002] Generally, a vacuum circuit breaker is a product designed to protect human life and load equipment by interrupting the circuit using a vacuum arc extinguishing method within a vacuum interrupter (VI) inside the breaker via an external relay when abnormal currents, such as overcurrents, short circuits, and ground faults, occur in extra-high voltage / high voltage distribution lines. These circuit breakers are installed in distribution panels that house and manage various electrical equipment for the operation, control, and motor operation of power plants and substations. Typically, the main body of the circuit breaker is installed by being housed in a distribution box partitioned within the distribution panel or inside a cradle fixed to the distribution panel.

[0003] The distribution box (cradle) has a Serve position where the circuit breaker terminals are connected to the load terminals of the cradle to supply voltage and current, and a Test position where the circuit breaker's operation can only be tested, separated from the terminals of the cradle.

[0004] FIGS. 1 to 3 illustrate a state in which a circuit breaker body (2) according to the prior art is housed in a distribution box (1). Here, FIGS. 1 and FIGS. 2 show a state in which the circuit breaker body (2) is placed in a test position in the distribution box (1). Also, FIGS. 1 shows a state in which the control power plug (3) is not inserted into the connector (4), and FIGS. 2 shows a state in which the control power plug (3) is inserted into the connector (4). Additionally, FIGS. 3 shows a state in which the circuit breaker body (2) is inserted into the distribution box (1) and placed in an operating position.

[0005] In the distribution box (10), an electrical signal can be transmitted to the circuit breaker body (2) at the service position or test position to enable the ON and OFF operation of the circuit breaker. To perform this operation, the control power plug (3) of the distribution box (10) is inserted into the connector (4) of the circuit breaker body (2).

[0006] In addition, a transfer device (5) is provided to move the circuit breaker body (2). The circuit breaker moved to each position (test position, operating position) performs closing (On) and closing (Off) operations.

[0007] Meanwhile, an auxiliary contact is provided to check the operating status of the circuit breaker remotely. The auxiliary contact outputs a "b" contact when the circuit breaker is in the off state and an "a" contact when it is in the closed state, allowing the user to check the status of the circuit breaker.

[0008] For example, when moving a circuit breaker from the operating position and the closed state to the test position, an interlock function is basically built in to prevent movement from the closed state; however, in order to move the circuit breaker to the test position, the "b" contact of the auxiliary contact is checked in advance, and the circuit breaker can move to the test position only after the off state of the circuit breaker is confirmed.

[0009] FIG. 4 shows a perspective view of a circuit breaker according to the prior art. An auxiliary contact assembly (20) is installed on the upper part of the mechanism (6) of the circuit breaker body (2). The auxiliary contact assembly (20) is installed to operate in conjunction with the main shaft (7).

[0010] FIGS. 5 to 8 show the operating states of auxiliary contacts in a circuit breaker according to the prior art. FIGS. 5 and 7 show the open state (a-contact On state), and FIGS. 6 and 8 show the closed state (b-contact On state).

[0011] The auxiliary contact assembly (20) has a mounting bracket (21) and an outer housing (22). The auxiliary contact assembly (20) has contacts (24, 25) installed inside, and the contacts (24, 25) are composed of an "a" contact (24) and a "b" contact (25).

[0012] A first link (27) and a second link (28) are connected to a contact shaft (26) as an operating structure to convert between "a" contact (24) and "b" contact (25). Here, a connection hole (29) connected to the main shaft (7) of the circuit breaker body (2) is formed in the second link (28).

[0013] When the closing or closing operation is performed by the mechanism (6) of the circuit breaker body (2), the second link (28) and the first link (27) move in conjunction with the rotation of the main shaft (7), and accordingly, the contact shaft (26) rotates in the same clockwise or counterclockwise direction as the main shaft (7).

[0014] Figure 5 shows the off state, and Figure 6 shows the input state.

[0015] Looking at the interior of the individual contact section through FIGS. 7 and FIGS. 8, it is as follows. The contact section includes an "a" contact (24) and a "b" contact (25) installed at a predetermined angle apart within a housing (23), and a movable contact (30) installed on a contact axis (26) that rotates to selectively connect each contact.

[0016] In the off state, the operating contact (30) connects the "a" contact (24), and in the switched state, the operating contact (30) connects the "b" contact (25).

[0017] Through a signal connected to the "a" contact (24) or the "b" contact (25), the operating status of the circuit breaker can be remotely checked, and the user's safety can be ensured.

[0018] In this way, the operating status of the circuit breaker can be checked through auxiliary contacts "a" and "b", and there are up to two auxiliary contact assemblies (20) applicable to the circuit breaker. The maximum number of contacts for each auxiliary contact assembly (20) is about 5 or 6, and consequently, the maximum number of auxiliary contacts usable in the circuit breaker is about 10.

[0019] The primary function of the auxiliary contact of a circuit breaker is to output the operating status externally, and it is applied in conjunction with other devices within the distribution panel.

[0020] However, recently, in order to ensure the safety of circuit breakers and protect other devices, the number of auxiliary contacts required is increasing as the devices become more complex. The problem to be solved

[0021] The present invention was devised to solve the aforementioned problems, and its purpose is to provide an auxiliary contact mechanism for a circuit breaker that increases the number of auxiliary contacts within a limited space. means of solving the problem

[0022] An auxiliary contact mechanism of a circuit breaker according to one embodiment of the present invention comprises: a first bracket and a second bracket spaced apart and installed on a circuit breaker body; and a first contact assembly and a second contact assembly disposed between the first bracket and the second bracket, wherein the first contact assembly comprises a plurality of first contact portions, and each of the plurality of first contact portions comprises a first a-contact, a first b-contact, and a first movable contact selectively connected to any one of the first a-contact and the first b-contact, and the second contact assembly comprises a plurality of second contact portions, and each of the plurality of second contact portions comprises a second a-contact, a second b-contact, and a second movable contact selectively connected to any one of the second a-contact and the second b-contact.

[0023] Herein, it further includes a plurality of first contact portion support pins that penetrate the first contact assembly and are fixed to the first bracket and the second bracket, and a plurality of second contact portion support pins that penetrate the second contact assembly and are fixed to the first bracket and the second bracket.

[0024] Additionally, it further includes a first housing that surrounds and protects the first contact assembly and is fixed to the first bracket and the second bracket, and a second housing that surrounds and protects the second contact assembly and is fixed to the first bracket and the second bracket.

[0025] Additionally, it further includes a first axial link connected to one end of the first contact assembly; a second axial link connected to one end of the second contact assembly; and a connecting link, one end of which is connected to the first axial link and the other end of which is connected to the second axial link.

[0026] Additionally, it further includes an auxiliary contact link that receives power from the main shaft of the circuit breaker body and rotates the first contact assembly and the second contact assembly.

[0027] In addition, the first bracket has a first-1 shaft hole in which one end of the first contact assembly is installed, and the

[0028] A first-2 shaft hole is formed in which one end of the second contact assembly is installed, and in the second bracket, a second-1 shaft hole is formed in which the other end of the first contact assembly is installed, and a second-2 shaft hole is formed in which the other end of the second contact assembly is installed.

[0029] Additionally, the first bracket has a first-1 support pin hole for fixing the first contact part support pin and a first-2 support pin hole for fixing the second contact part support pin formed therein, and the second bracket has a second-1 support pin hole for fixing the first contact part support pin and a second-2 support pin hole for fixing the second contact part support pin formed therein.

[0030] In addition, the first bracket and the second bracket are each formed in an L-shape, and the first contact assembly is installed at one end of the first bracket and one end of the second bracket, and the second contact assembly is installed at the other end of the first bracket and the other end of the second bracket.

[0031] In addition, the first contact assembly and the second contact assembly are spaced apart from each other at a predetermined angle.

[0032] In addition, one side of the first housing is open and a first shaft groove is formed communicating with said side, and one side of the second housing is open and a second shaft groove is formed communicating with said side.

[0033] Additionally, the first contact portion further includes a first contact portion plate on which the first a-contact, the first b-contact, and the first movable contact are installed, and the second contact portion further includes a second contact portion plate on which the second a-contact, the second b-contact, and the second movable contact are installed.

[0034] Additionally, the first contact assembly further includes a first contact shaft penetrating the plurality of first contact plates, and the second contact assembly further includes a second contact shaft penetrating the plurality of second contact plates.

[0035] Additionally, the first contact assembly further includes a first contact shaft ring installed on the first bracket and the second bracket, respectively, and rotatably supporting the first contact shaft, and the second contact assembly further includes a second contact shaft ring installed on the first bracket and the second bracket, respectively, and rotatably supporting the second contact shaft.

[0036] In addition, a first shaft link hole is formed at one end of the first shaft link, into which one end of the first contact part shaft can be inserted, and a first shaft link projection is formed at the other end of the first shaft link, into which one end of the connecting link can be inserted, and a second shaft link hole is formed at one end of the second shaft link, into which one end of the second contact part shaft can be inserted, and a second shaft link projection is formed at the other end of the second shaft link, into which the other end of the connecting link can be inserted.

[0037] In addition, a first connecting hole into which the first axial link projection can be inserted is formed at one end of the connecting link, and a second connecting hole into which the second axial link projection can be inserted is formed at the other end of the connecting link.

[0038] In addition, a coupling ring is provided between the connecting link and the first axial link and between the connecting link and the second axial link.

[0039] In addition, the auxiliary contact link comprises an auxiliary contact shaft link connected to the main shaft and an auxiliary contact transmission link connecting the first contact shaft and the auxiliary contact shaft link.

[0040] And, the auxiliary contact shaft link and the auxiliary contact transmission link are rotatably connected by a connecting pin. Effects of the invention

[0041] According to an auxiliary contact mechanism of a circuit breaker according to one embodiment of the present invention, a parallel auxiliary contact assembly is provided, and the number of auxiliary contacts is expanded.

[0042] Here, the parallel auxiliary contact assembly is composed of a first contact assembly and a second contact assembly, so that the number of contacts is doubled. Therefore, the number of auxiliary contacts can be expanded within a limited space.

[0043] In addition, the auxiliary contact shaft link connected to the first contact assembly is connected to the second contact assembly by a connecting link, allowing them to operate together easily. Brief explanation of the drawing

[0044] FIGS. 1 to 3 illustrate a distribution box according to the prior art. FIGS. 1 to 3 illustrate a state in which a circuit breaker body according to the prior art is housed in a distribution box. Here, FIGS. 1 and 2 show a state in which the circuit breaker body is placed in a test position in the distribution box. Additionally, FIG. 1 shows a state in which the control power plug is not inserted into the connector, and FIG. 2 shows a state in which the control power plug is inserted into the connector. Additionally, FIG. 3 shows a state in which the circuit breaker body is placed in an operating position in the distribution box. FIG. 4 is a perspective view of a circuit breaker according to the prior art. FIGS. 5 to 8 show the operating states of auxiliary contacts in a circuit breaker according to the prior art. FIGS. 5 and 7 show the open state (a-contact On state), and FIGS. 6 and 8 show the closed state (b-contact On state). FIGS. 9 and FIGS. 10 are circuit breakers according to an embodiment of the present invention viewed from different directions. FIGS. 11 to 13 are perspective and exploded perspective views of an auxiliary contact assembly applied to a circuit breaker according to one embodiment of the present invention. FIGS. 14 to 17 show the operating states of auxiliary contacts in a circuit breaker according to the prior art. FIGS. 14 and 16 show an open state (a-contact On state), and FIGS. 15 and 17 show a closed state (b-contact On state). Specific details for implementing the invention

[0045] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, this description is intended to be detailed enough for a person skilled in the art to easily practice the invention, and it does not imply that the technical scope and concept of the present invention are limited by these drawings.

[0046] The terms "part" or "part" used to refer to components in this invention are not used for any limiting purpose and may be omitted.

[0047] FIGS. 9 and FIGS. 10 are views of a circuit breaker according to an embodiment of the present invention from different directions. With reference to the drawings, the auxiliary contact mechanism of the circuit breaker according to each embodiment of the present invention will be described in detail.

[0048] An auxiliary contact mechanism of a circuit breaker according to one embodiment of the present invention comprises a first bracket (301) and a second bracket (310) spaced apart from each other on the main body of the circuit breaker, and a first contact assembly (340) and a second contact assembly (350) disposed between the first bracket (301) and the second bracket (310). The first contact assembly (340) comprises a plurality of first contact parts (341), and each of the plurality of first contact parts (341) comprises a first a-contact (345), a first b-contact (346), and a first movable contact (347) selectively connected to either the first a-contact (345) or the first b-contact (346). The second contact assembly (350) comprises a plurality of second contact parts (351), and each of the plurality of second contact parts (351) comprises a second a-contact (355), a second b-contact (356), and the It includes a second movable contact (357) that is selectively connected to either the second a-contact (355) or the second b-contact (356).

[0049] A circuit breaker according to one embodiment of the present invention may be a vacuum circuit breaker. Main parts of a vacuum circuit breaker are illustrated in FIGS. 9 and 10. When abnormal currents such as overcurrent, short circuit, and ground fault occur in extra-high voltage / high voltage distribution lines, the vacuum circuit breaker separates the fixed contacts and movable contacts inside the breaker by means of a control power source of a separately provided relay, thereby interrupting the circuit.

[0050] Here, the fixed contact and the movable contact are equipped in a vacuum interrupter (VI). The vacuum interrupter operates using a vacuum arc extinguishing method to rapidly extinguish high-temperature and high-pressure arcs and prevent the arc from leaking to the outside, thereby demonstrating excellent performance in protecting personnel and load equipment.

[0051] The circuit breaker (100) includes a main circuit section (110) and a mechanism section (120).

[0052] The main circuit section (110) is connected to the main circuit and connected to the power supply and the load. Behind the main circuit section (110), a first terminal (upper terminal) (114) connected to the power supply and a second terminal (lower terminal) (115) connected to the load are provided. Here, the first terminal (114) can be connected to a fixed contact (not shown) inside the vacuum interrupter, and the second terminal (115) can be connected to a movable contact (not shown) inside the vacuum interrupter.

[0053] The main circuit section (110) is provided for each phase of the circuit. For example, in the case of a three-phase circuit, three circuit sections (111, 112, 113) for the R phase, S phase, and T phase are provided. In the case of a vacuum circuit breaker, a vacuum interrupter is provided in each circuit section (111, 112, 113), and a fixed contact and a movable contact are provided. That is, a blocking section (fixed contact and movable contact) is provided for each phase.

[0054] The mechanism (120) includes a motor assembly (130) for charging a spring (not shown), a mechanism assembly (140) that transmits a force (restoring force) acting by the discharge of the spring to the main shaft (190), and an on / off button (126, 125) that causes the insertion or opening action of the blocking part.

[0055] The motor assembly (130) includes a motor (132) and a gear section (135) that provide driving force for charging the input spring.

[0056] The motor (132) is driven by a separately provided control power source to produce a driving force for charging the insertion spring.

[0057] The gear section (135) transmits the driving force of the motor (132) and is formed by connecting multiple gears. An output gear (136) is positioned at the end of the gear section (135).

[0058] The output gear (136) is connected to the cam assembly (145) of the mechanism assembly (140). That is, the cam shaft (146) receives power from the output gear (136), rotates, and charges the input spring.

[0059] A crank assembly (150) is connected to the camshaft (146) of the cam assembly (145). The crank assembly (150) is connected to the main shaft (190) and rotates the main shaft (190).

[0060] A main shaft (190) is installed behind the motor assembly (130) and the mechanism assembly (140). The main shaft (190) provides power to the blocking part of the main circuit section (110). Specifically, the main shaft (190) operates the movable contact of the main circuit section (110).

[0061] A shaft link (170) is connected to the main shaft (190). A shaft lever (191) is provided on the main shaft (190). The shaft lever (191) protrudes radially from the main shaft (190). The shaft link (170) is axially connected to the shaft lever (191). Thus, when the main shaft (190) rotates, the shaft link (170) can move in the up and down directions.

[0062] When the On button (126) is activated to start the insertion operation, the main shaft (190) rotates clockwise and the shaft link (170) rises, and when the Off button (125) is activated to start the opening operation, the main shaft (190) rotates counterclockwise and the shaft link (170) lowers.

[0063] A drive link (195) is axially connected to the lower end of the shaft link (170). The drive link (195) moves up and down by the shaft link (170) and operates the movable contact.

[0064] The shaft link (170) has its upper end axially connected to a shaft lever (191) fixed to the main shaft (190), and its lower end axially connected to a drive link (195) by a lower connecting part (172).

[0065] Meanwhile, a counter (160) is provided on one side of the mechanism assembly (140) to measure the number of times the main shaft (190) is inserted. The counter (160) operates in conjunction with the main shaft (190) or the shaft link (170).

[0066] The circuit breaker (100) is carried on a transfer device (200) and moved in / out. The transfer device (200) is provided with a handle (210) and a wheel (220) so that the circuit breaker (100) can be moved manually. Additionally, the transfer device (200) is provided with a screw insertion port (205) for inserting a screw to move the position of the circuit breaker (100).

[0067] We will now describe auxiliary contact assemblies (250, 300) applied to a circuit breaker (100). The circuit breaker (100) of the present invention is shown to be equipped with both a straight auxiliary contact assembly (250) similar to the prior art and a newly designed parallel auxiliary contact assembly (300) (see FIG. 10). Among these, the straight auxiliary contact assembly (250) is similar to the prior art, so a detailed description will be omitted.

[0068] FIGS. 11 to 13 are perspective and exploded perspective views of an auxiliary contact assembly applied to a circuit breaker according to one embodiment of the present invention.

[0069] A parallel auxiliary contact assembly (300) will be described. The parallel auxiliary contact assembly (300) is installed in the mechanism (120) of the circuit breaker (100). The parallel auxiliary contact assembly (300) operates in conjunction with the main shaft (190) of the mechanism (120). The parallel auxiliary contact assembly (300) is equipped with a plurality of a-contacts and b-contacts to transmit signals according to the closing and opening states of the circuit breaker. Here, the number of contacts is expanded by equipping the parallel auxiliary contact assembly (300) with a first contact assembly (340) and a second contact assembly (350).

[0070] A first bracket (301) is provided. Since the first bracket (301) is a bracket positioned on the left side of the auxiliary contact assembly (300), it may also be called a left bracket. The first bracket (301) is formed as a flat plate.

[0071] A first-1 shaft hole (302) is formed in the first bracket (301). One end of the first contact assembly (340) is installed in the first-1 shaft hole (302).

[0072] A first-2 shaft hole (303) is formed in the first bracket (301). The first-2 shaft hole (303) is formed at a predetermined distance from the first-1 shaft hole (302). One end of the second contact assembly (350) is installed in the first-2 shaft hole (303).

[0073] Two first-1 support pin holes (305) are formed in the first bracket (301). The first-1 support pin holes (305) are positioned symmetrically to each other with respect to the first-1 shaft hole (302). One end of the first contact part support pin (344) is installed in the first-1 support pin hole (305).

[0074] A first-2 support pin hole (306) is formed in the first bracket (301). The first-2 support pin hole (306) is formed at a predetermined distance from the first-1 support pin hole (305). The first-2 support pin hole (306) is positioned symmetrically to each other with respect to the first-2 shaft hole (303). One end of the second contact part support pin (354) is installed in the first-2 support pin hole (306).

[0075] Two first-1 housing holes (308) are formed in the first bracket (301). The first-1 housing holes (308) are positioned symmetrically to each other with respect to the first-1 shaft hole (302). One side of the first housing (320) is coupled to the first-1 housing holes (308).

[0076] A first-2 housing hole (309) is formed in the first bracket (301). The first-2 housing hole (309) is formed at a predetermined distance from the first-1 housing hole (308). The first-2 housing hole (309) is positioned symmetrically to each other with respect to the first-2 shaft hole (303). One side of the second housing (330) is coupled to the first-2 housing hole (309).

[0077] A first mounting portion (307) is provided on the first bracket (301). The first mounting portion (307) may be provided as an L-shaped plate protruding outward from the first bracket (301). The first bracket (301) is installed on the mechanism (120) by means of a fastening member coupled to the first mounting portion (307).

[0078] A second bracket (310) is provided. Since the second bracket (310) is a bracket positioned to the right of the auxiliary contact assembly (310), it may also be called a right bracket. The second bracket (310) is formed as a flat plate.

[0079] A second-1 shaft hole (312) is formed in the second bracket (310). The other end of the first contact assembly (340) is installed in the second-1 shaft hole (312).

[0080] A second-2 shaft hole (313) is formed in the second bracket (310). The second-2 shaft hole (313) is formed at a predetermined distance from the second-1 shaft hole (312). The other end of the second contact assembly (350) is installed in the second-2 shaft hole (313).

[0081] Two second-1 support pin holes (315) are formed in the second bracket (310). The second-1 support pin holes (315) are positioned symmetrically to each other with respect to the second-1 shaft hole (312). The other end of the first contact part support pin (344) is installed in the second-1 support pin hole (315).

[0082] A second support pin hole (316) is formed in the second bracket (310). The second support pin hole (316) is formed at a predetermined distance from the second support pin hole (315). The second support pin hole (316) is positioned symmetrically to each other with respect to the second axis hole (313). The other end of the second contact part support pin (354) is installed in the second support pin hole (316).

[0083] Two second-1 housing holes (318) are formed in the second bracket (310). The second-1 housing holes (318) are positioned symmetrically to each other with respect to the second-1 shaft hole (312). The other side of the first housing (320) is connected to the second-1 housing holes (318).

[0084] A second-2 housing hole (319) is formed in the second bracket (310). The second-2 housing hole (319) is formed at a predetermined distance from the second-1 housing hole (318). The second-2 housing hole (319) is positioned symmetrically to each other with respect to the second-2 shaft hole (313). The other side of the second housing (330) is coupled to the second-2 housing hole (319).

[0085] A second mounting portion (317) is provided on the second bracket (310). The second mounting portion (317) may be provided as an L-shaped plate protruding outward from the second bracket (310). The second bracket (310) is installed on the mechanism (120) by means of a fastening member coupled to the second mounting portion (317).

[0086] The first bracket (301) and the second bracket (310) can each be formed in an L-shape. This is to install the first housing (320) and the second housing (330). That is, to accommodate the first contact assembly (340) and the second contact assembly (350).

[0087] The first contact assembly (340) is installed at one end of the first bracket (301) and one end of the second bracket (310), and the second contact assembly (350) is installed at the other end of the first bracket (301) and the other end of the second bracket (310). Here, the first contact assembly (340) and the second contact assembly (350) are spaced apart from each other at a predetermined angle.

[0088] A first housing (320) is provided. The first housing (320) may be formed in the shape of a box with one side (e.g., the rear) open. The first housing (320) is provided to surround, support, and protect the first contact assembly (340).

[0089] In the first housing (320), a first shaft groove (322) is formed in a 'U' shape. The first shaft groove (322) is formed as a groove communicating with an open surface. A first contact shaft (343) and a second contact shaft (353) are inserted into the first shaft groove (322).

[0090] First side protrusions (325) are formed on each side of the first housing (320) and are coupled to the first-1 housing hole (308) of the first bracket (301) or the second-1 housing hole (318) of the second bracket (310).

[0091] A second housing (330) is provided. The second housing (330) may be formed in the shape of a box with one side (e.g., the bottom) open. The second housing (330) is provided to surround, support, and protect the second contact assembly (350).

[0092] In the second housing (330), a second shaft groove (332) is formed in a 'U' shape. The second shaft groove (332) is formed as a groove communicating with the open surface. A first contact shaft (343) and a second contact shaft (353) are inserted into the second shaft groove (332).

[0093] On both sides of the second housing (330), a second side projection (335) is formed and coupled to the first-second housing hole (309) of the first bracket (301) or the second-second housing hole (319) of the second bracket (310).

[0094] The first housing (320) and the second housing (330) are each connected to the first bracket (301) and the second bracket (310).

[0095] The first housing (320) and the second housing (330) may be identical components. However, the positions where they are installed on the first bracket (301) and the second bracket (310) are different. For example, the first housing (320) and the second housing (330) may be positioned at an angle of 90 degrees to each other.

[0096] A contact assembly (340, 350) is provided. The contact assembly (340, 350) consists of two parts: a first contact assembly (340) and a second contact assembly (350). The contact assembly (340, 350) is composed of multiple parts to expand the number of a-contacts and b-contacts. Further reference is made to the detailed contact section of FIGS. 16 and FIGS. 17.

[0097] A first contact assembly (340) is provided.

[0098] The first contact assembly (340) includes several first contact portions (341), a first contact portion support pin (344) for supporting them and fixing them to the first and second brackets (301, 310), and a first contact portion shaft ring (349).

[0099] The first contact portion (341) includes a first a-contact (345), a first b-contact (346), and a first movable contact (347) installed on the first contact portion plate (342), and a first contact portion shaft (343) installed through a plurality of first contact portion plates (342).

[0100] The first contact plate (342) is formed as an elliptical plate.

[0101] The first contact plate (342) is provided with a first receiving portion (342a) in which a first a-contact (345), a first b-contact (346), and a first movable contact (347) are arranged. The first receiving portion (342a) is formed as a circular groove that occupies most of the area of ​​the first contact plate (342).

[0102] A first contact part support pin insertion hole (342b) is formed adjacent to the first receiving part (342a) in the first contact part plate (342) so that a first contact part support pin (344) can be inserted therein. The first contact part support pin insertion hole (342b) is provided as a pair symmetrically centered on the first receiving part (342a).

[0103] In the first contact plate (342), a first contact housing shaft hole (342c) is formed in the center through which a first contact shaft (343) can be inserted.

[0104] The first a-contact (345), the first b-contact (346), and the first movable contact (347) are inserted and installed in the first receiving portion (342a) of the first contact plate (342). Here, only one end of each of the first a-contact (345) and the first b-contact (346) is inserted into the first receiving portion (342a).

[0105] The first a-contact (345) and the first b-contact (346) are each provided as a symmetrical pair and are arranged at a distance of about 90 degrees from each other. That is, the pair of first a-contacts (345) are arranged in a straight line, and the pair of first b-contacts (346) are arranged on a straight line that forms a predetermined angle with the straight line formed by the pair of first a-contacts (345).

[0106] The first movable contact (347) is arranged to connect either the first a-contact (345) or the first b-contact (346). For example, the first movable contact (347) connects a pair of the first a-contacts (345) in the open state and connects a pair of the first b-contacts (346) in the closed state.

[0107] A first contact shaft hole (347a) may be formed in a square shape at the center of the first movable contact (347). A first contact shaft (343) is inserted and installed in the first contact shaft hole (347a) to rotate the first movable contact (347).

[0108] A first contact part shaft ring (349) is provided to rotatably support the first contact part shaft (343). The first contact part shaft ring (349) has an inner surface formed in a square shape and an outer surface formed in a circular shape. The first contact part shaft (343) is inserted into a hole formed on the inner surface of the first contact part shaft ring (349), and the outer surface of the first contact part shaft ring (349) is inserted and installed in the first-1 shaft hole (302) of the first bracket (301) and the second-1 shaft hole (312) of the second bracket (310), respectively, so that it can rotate.

[0109] A second contact assembly (350) is provided.

[0110] The second contact assembly (350) includes a plurality of second contact portions (351), a second contact portion support pin (354) for supporting them and fixing them to the first and second brackets (301, 310), and a second contact portion shaft ring (359).

[0111] The second contact portion (351) includes a second a-contact (355), a second b-contact (356), and a second movable contact (357) installed on the second contact portion plate (352), and a second contact portion shaft (353) installed through a plurality of second contact portion plates (352).

[0112] The second contact plate (352) is formed as an elliptical plate.

[0113] The second contact plate (352) is provided with a second receiving portion (352a) in which a second a-contact (355), a second b-contact (356), and a second movable contact (357) are arranged. The second receiving portion (352a) is formed as a circular groove that occupies most of the area of ​​the second contact plate (352).

[0114] A second contact part support pin insertion hole (352b) is formed adjacent to the second receiving part (352a) in the second contact part plate (352) so that a second contact part support pin (354) can be inserted therein. The second contact part support pin insertion hole (352b) is provided as a pair symmetrically centered on the second receiving part (352a).

[0115] In the second contact plate (352), a second contact housing shaft hole (352c) is formed in the center through which a second contact shaft (353) can be inserted.

[0116] The second a-contact (355), the second b-contact (356), and the second movable contact (357) are inserted and installed in the second receiving portion (352a) of the second contact portion plate (352). Here, only one end of each of the second a-contact (355) and the second b-contact (356) is inserted into the second receiving portion (352a).

[0117] The second a-contact (355) and the second b-contact (356) are each provided as a symmetrical pair and are arranged at a distance of about 90 degrees from each other. That is, a pair of second a-contacts (355) are arranged in a straight line, and a pair of second b-contacts (356) are arranged in a straight line that forms a predetermined angle with respect to the straight line formed by the pair of second a-contacts (355).

[0118] The second movable contact (357) is arranged to connect either the second a-contact (355) or the second b-contact (356). For example, the second movable contact (357) connects a pair of the second a-contacts (355) in the open state and connects a pair of the second b-contacts (356) in the closed state.

[0119] A second contact shaft hole (357a) may be formed in a square shape in the center of the second movable contact (357). A second contact shaft (353) is inserted and installed in the second contact shaft hole (357a) to rotate the second movable contact (357).

[0120] A second contact part shaft ring (359) is provided to rotatably support the second contact part shaft (353). The inner surface of the second contact part shaft ring (359) is formed in a square shape, and the outer surface is formed in a circular shape. The second contact part shaft (353) is inserted into a hole formed on the inner surface of the second contact part shaft ring (359), and the outer surface of the second contact part shaft ring (359) is inserted and installed in the first-2 shaft hole (302) of the first bracket (301) and the second-2 shaft hole (312) of the second bracket (310), respectively, so that it can rotate.

[0121] An axial link (360, 365) and a connecting link (370) are provided to move the first contact assembly (340) and the second contact assembly (350) simultaneously. When the first contact assembly (340) rotates, the second contact assembly (350) also rotates through the axial link (360, 365) and the connecting link (370).

[0122] A first shaft link (360) connected to one end of the first contact assembly (340) and a second shaft link (365) connected to one end of the second contact assembly (350) are provided.

[0123] The first shaft link (360) is installed between the first contact shaft (343) and the connecting link (370). A first shaft link hole (363) is formed at one end of the first shaft link (360) so that the end of the first contact shaft (343) can be inserted, and a first shaft link projection (362) is formed at the other end of the first shaft link (360) so that the end of the connecting link (370) can be inserted. The first shaft link (360) rotates around the first shaft link hole (363). The first shaft link (360) rotates together with the first contact shaft (343) inserted into the first shaft link hole (363) as the first contact shaft (343) rotates in a clockwise or counterclockwise direction.

[0124] The second shaft link (365) is installed between the second contact shaft (353) and the connecting link (370). A second shaft link hole (368) is formed at one end of the second shaft link (365) into which the end of the second contact shaft (353) can be inserted, and a second shaft link projection (367) is formed at the other end of the second shaft link (365) into which the end of the connecting link (370) can be inserted. The second shaft link (365) rotates around the second shaft link hole (368). The second shaft link (365) rotates together with the second contact shaft (353) inserted into the second shaft link hole (368) as the second contact shaft (353) rotates in a clockwise or counterclockwise direction.

[0125] A connecting link (370) is provided. The connecting link (370) is installed between the first axis link (360) and the second axis link (365).

[0126] The connecting link (370) may be formed in a straight line. Alternatively, the connecting link (370) may have a bent middle section.

[0127] A first connecting hole (372) is formed in the first end (371) of the connecting link (370) into which the first shaft link projection (362) of the first shaft link (360) can be inserted, and a second connecting hole (374) is formed in the other end (373) of the connecting link (370) into which the second shaft link projection (367) of the second shaft link (365) can be inserted.

[0128] A connecting ring (391, 392) may be provided between the connecting link (370) and the first axis link (360). These connecting rings (391, 392) may be composed of C-rings.

[0129] An auxiliary contact link (380, 385) is provided to rotate the first contact assembly (340) or the second contact assembly (350) in conjunction with an insertion operation or an opening operation.

[0130] The auxiliary contact link (380, 385) is provided to receive power from the main shaft (190) to rotate the first contact assembly (340) or the second contact assembly (350). The auxiliary contact link (380) may be composed of an auxiliary contact shaft link (380) connected to the main shaft (190) and an auxiliary contact transmission link (385) connected to the first contact shaft (343).

[0131] A shaft hole (383) is formed at the lower end of the auxiliary contact shaft link (380) to be coupled to the main shaft (190).

[0132] A coupling pin (381) connected to an auxiliary contact transmission link (385) is coupled to the upper part of the auxiliary contact shaft link (380).

[0133] The auxiliary contact shaft link (380) moves up and down according to the rotational movement of the main shaft (190). At this time, a shaft lever (395) may be interposed between the auxiliary contact shaft link (380) and the main shaft (190) (see FIG. 10).

[0134] A connecting pin (381) connected to an auxiliary contact shaft link (380) is connected to one end of the auxiliary contact transmission link (385).

[0135] At the other end of the auxiliary contact transmission link (385), a shaft hole (386) is formed to which the first contact shaft (343) is coupled.

[0136] With further reference to FIGS. 14 to 17, the operation of an auxiliary contact mechanism of a circuit breaker according to an embodiment of the present invention will be explained. FIGS. 14 and 16 show an open state (a-contact On state), and FIGS. 15 and 17 show an closed state (b-contact On state).

[0137] First, let's examine the input action.

[0138] In an open state as in FIG. 14 and FIG. 16, the auxiliary contact shaft link (380) is in a raised position, and each movable contact (347, 357) is in contact with each a-contact (345, 355).

[0139] When the On button (126) of the mechanism (120) is pressed and the main shaft (190) is inserted, the auxiliary contact shaft link (380) descends and the auxiliary contact transmission link (385) rotates clockwise to rotate the first contact shaft (343) clockwise and simultaneously rotate the first shaft link (360) clockwise.

[0140] As the first contact shaft (343) rotates, the first movable contact (347) is connected to the first b-contact (346).

[0141] Then, as the first axis link (360) rotates clockwise, the connecting link (370) moves in translation in conjunction with it, and the second axis link (365) also rotates clockwise. Accordingly, the second contact shaft (353) rotates clockwise, and the second movable contact (357) is connected to the second b-contact (356). That is, an insertion state as shown in FIGS. 15 and FIGS. 17 is achieved.

[0142] Next, we will examine the opening action.

[0143] In the input state as in FIG. 15 and FIG. 17, the auxiliary contact shaft link (380) is in a lowered position, and each movable contact (347, 357) is in contact with each b-contact (346, 356).

[0144] When the Off button (125) of the mechanism (120) is pressed and the main shaft (190) is opened, the auxiliary contact shaft link (380) rises and the auxiliary contact transmission link (385) rotates counterclockwise to rotate the first contact shaft (343) counterclockwise and simultaneously rotate the first shaft link (360) counterclockwise.

[0145] As the first contact shaft (343) rotates, the first movable contact (347) is connected to the first a-contact (345).

[0146] Then, as the first axis link (360) rotates counterclockwise, the connecting link (370) moves in translation in conjunction with it, and the second axis link (365) also rotates counterclockwise. Accordingly, the second contact shaft (353) rotates counterclockwise, and the second movable contact (357) is connected to the second a-contact (355). That is, an open state as shown in FIGS. 14 and FIGS. 16 is achieved.

[0147] According to an auxiliary contact mechanism of a circuit breaker according to one embodiment of the present invention, a parallel auxiliary contact assembly is provided, and the number of auxiliary contacts is expanded.

[0148] Here, the parallel auxiliary contact assembly is composed of a first contact assembly and a second contact assembly, so that the number of contacts is doubled. Therefore, the number of auxiliary contacts can be expanded within a limited space.

[0149] In addition, the auxiliary contact shaft link connected to the first contact assembly is connected to the second contact assembly by a connecting link, allowing them to operate together easily.

[0150] The embodiments described above illustrate the best embodiments for implementing the present invention, and those skilled in the art will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, these embodiments are merely for illustrative purposes, not for limiting the technical concept of the present invention. Consequently, it should be understood that the scope of the technical concept of the present invention is not limited by these embodiments. That is, the scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0151] 100 circuit breakers 110 Main circuit section 120 mechanical parts 130 motor assembly 140 Mechanical Assembly 170 shaft link 190 Main Shaft 200 transfer device 300 Parallel Auxiliary Contact Assembly 301 First bracket 310 Second bracket 320 1st Housing 330 2nd Housing 340 First contact assembly 341 First contact part 342 First contact plate 343 First contact shaft 344 First contact part support pin 345 1st a-contact 346 1st b-contact 347 1st movable contact 349 1st shaft ring 350 Second contact assembly 351 Second contact part 352 Second contact plate 353 Second contact shaft 354 Second contact part support pin 355 Second a-contact 356 Second b-contact 357 Second movable contact 359 2nd shaft ring 360 1st Axis Link 365 2nd Axis Link 370 links 380 auxiliary contact shaft link 385 Auxiliary Contact Transmission Link

Claims

Claim 1 An auxiliary contact mechanism of a circuit breaker comprising: a first bracket and a second bracket spaced apart and installed on a main body of a circuit breaker; and a first contact assembly and a second contact assembly disposed between the first bracket and the second bracket, wherein the first contact assembly comprises a plurality of first contact portions, and each of the plurality of first contact portions comprises a first a-contact, a first b-contact, and a first movable contact selectively connected to any one of the first a-contact and the first b-contact, and the second contact assembly comprises a plurality of second contact portions, and each of the plurality of second contact portions comprises a second a-contact, a second b-contact, and a second movable contact selectively connected to any one of the second a-contact and the second b-contact. Claim 2 An auxiliary contact mechanism of a circuit breaker according to claim 1, further comprising a plurality of first contact portion support pins fixed to the first bracket and the second bracket by penetrating the first contact assembly, and a plurality of second contact portion support pins fixed to the first bracket and the second bracket by penetrating the second contact assembly. Claim 3 An auxiliary contact mechanism of a circuit breaker according to claim 1, further comprising a first housing that surrounds and protects the first contact assembly and is fixed to the first bracket and the second bracket, and a second housing that surrounds and protects the second contact assembly and is fixed to the first bracket and the second bracket. Claim 4 An auxiliary contact mechanism of a circuit breaker according to claim 1, further comprising: a first axial link connected to one end of the first contact assembly; a second axial link connected to one end of the second contact assembly; and a connecting link having one end connected to the first axial link and the other end connected to the second axial link. Claim 5 An auxiliary contact mechanism of a circuit breaker according to claim 4, further comprising an auxiliary contact link that receives power from the main shaft of the circuit breaker body and rotates the first contact assembly and the second contact assembly. Claim 6 An auxiliary contact mechanism of a circuit breaker according to claim 1, wherein the first bracket has a first-1 shaft hole in which one end of the first contact assembly is installed and a first-2 shaft hole in which one end of the second contact assembly is installed, and the second bracket has a second-1 shaft hole in which the other end of the first contact assembly is installed and a second-2 shaft hole in which the other end of the second contact assembly is installed. Claim 7 An auxiliary contact mechanism of a circuit breaker, wherein, in paragraph 2, the first bracket has a first-1 support pin hole for fixing the first contact portion support pin and a first-2 support pin hole for fixing the second contact portion support pin, and the second bracket has a second-1 support pin hole for fixing the first contact portion support pin and a second-2 support pin hole for fixing the second contact portion support pin. Claim 8 An auxiliary contact mechanism of a circuit breaker, wherein, in claim 1, the first bracket and the second bracket are each formed in an L-shape, the first contact assembly is installed at one end of the first bracket and one end of the second bracket, and the second contact assembly is installed at the other end of the first bracket and the other end of the second bracket. Claim 9 In claim 8, the first contact assembly and the second contact assembly are an auxiliary contact mechanism of a circuit breaker that are spaced apart from each other at a predetermined angle. Claim 10 An auxiliary contact mechanism of a circuit breaker, wherein, in paragraph 3, one side of the first housing is open and a first shaft groove communicating with said one side is formed, and one side of the second housing is open and a second shaft groove communicating with said one side is formed. Claim 11 An auxiliary contact mechanism of a circuit breaker, wherein the first contact portion further comprises a first contact portion plate on which the first a-contact, the first b-contact, and the first movable contact are installed, and the second contact portion further comprises a second contact portion plate on which the second a-contact, the second b-contact, and the second movable contact are installed. Claim 12 An auxiliary contact mechanism of a circuit breaker, wherein the first contact assembly further comprises a first contact shaft penetrating a plurality of the first contact plates, and the second contact assembly further comprises a second contact shaft penetrating a plurality of the second contact plates. Claim 13 An auxiliary contact mechanism of a circuit breaker, wherein the first contact assembly further comprises a first contact shaft ring installed on the first bracket and the second bracket respectively and rotatably supporting the first contact shaft, and the second contact assembly further comprises a second contact shaft ring installed on the first bracket and the second bracket respectively and rotatably supporting the second contact shaft. Claim 14 An auxiliary contact mechanism of a circuit breaker, wherein, in claim 12, a first axial link hole is formed at one end of the first axial link to which one end of the first contact part shaft can be inserted, and a first axial link projection is formed at the other end of the first axial link to which one end of the connecting link can be inserted, a second axial link hole is formed at one end of the second axial link to which one end of the second contact part shaft can be inserted, and a second axial link projection is formed at the other end of the second axial link to which the other end of the connecting link can be inserted. Claim 15 An auxiliary contact mechanism of a circuit breaker according to claim 14, wherein a first connecting hole into which the first axial link projection can be inserted is formed at one end of the connecting link, and a second connecting hole into which the second axial link projection can be inserted is formed at the other end of the connecting link. Claim 16 An auxiliary contact mechanism of a circuit breaker according to claim 4, wherein a coupling ring is provided between the connecting link and the first axial link and between the connecting link and the second axial link. Claim 17 In claim 12, the auxiliary contact link is an auxiliary contact mechanism of a circuit breaker comprising an auxiliary contact shaft link connected to the main shaft and an auxiliary contact transmission link connecting the first contact shaft and the auxiliary contact shaft link. Claim 18 In claim 17, the auxiliary contact shaft link and the auxiliary contact transmission link are an auxiliary contact mechanism of a circuit breaker rotatably coupled by a coupling pin.

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