Adjustment method of horizontal two-point circuit breaker and horizontal two-point circuit breaker

Abstract

The invention relates to an adjusting method of a horizontal two-point circuit breaker and the horizontal two-point circuit breaker. When an external force is applied to a movable contact part when a horizontal two-point circuit breaker is in a closed state, the movable contact part located at an appropriate position relative to a fixed contact part may shift. In addition, when the horizontal two-point circuit breaker is repeatedly opened and closed, a member of the fixed contact part, which is in contact with the movable contact part, is worn. When the frictional resistance increases due to the wear of a member in the fixed contact part that contacts the movable contact part, it is possible that the movable contact part does not stop at an appropriate position when transitioning from the open circuit state to the closed circuit state. One embodiment of the present invention provides a method for adjusting a horizontal two-point circuit breaker, which mechanically adjusts the horizontal two-point circuit breaker. The method for adjusting the horizontal two-point circuit breaker includes a step of adjusting a pressing force, which is a force that the movable contact portion presses against the fixed contact portion when the horizontal two-point circuit breaker is in a closed state.

Description

Technical Field

[0001] The invention relates to an adjustment method for a horizontal two-point circuit breaker and the horizontal two-point circuit breaker. Background Art

[0002] A horizontal two-point circuit breaker is a type of disconnector used in an electrical power distribution system (see Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 7116225 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] If an external force is applied to the movable contact of a horizontal two-point circuit breaker in a closed state, the movable contact, which is positioned appropriately relative to the fixed contact, may be displaced.

[0008] Furthermore, repeated opening and closing of horizontal two-point circuit breakers can cause wear of the fixed contact components that the movable contact contacts. Wear of these fixed contact components increases frictional resistance, potentially preventing the movable contact from stopping in the proper position when switching from open to closed.

[0009] Solutions to Problems

[0010] One embodiment of the present invention provides a method for adjusting a horizontal two-point circuit breaker, which mechanically adjusts the horizontal two-point circuit breaker. The method for adjusting the horizontal two-point circuit breaker includes the step of adjusting the force, i.e., the pressing force, with which a movable contact portion presses against a fixed contact portion when the horizontal two-point circuit breaker is in a closed circuit state. One embodiment of the present invention provides a horizontal two-point circuit breaker, which is used to open and close a charged circuit. The horizontal two-point circuit breaker includes a fixed portion having a fixed contact portion. The horizontal two-point circuit breaker includes a movable portion having a movable contact portion. The horizontal two-point circuit breaker includes an adjustment mechanism for adjusting the force, i.e., the pressing force, with which the movable contact portion presses against the fixed contact portion when the horizontal two-point circuit breaker is in a closed circuit state. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view showing an example of the structure of the horizontal two-point circuit breaker 100.

[0012] Figure 2 This is a perspective view showing an example of a configuration in which the horizontal two-point circuit breaker 100 is used in a three-phase three-wire circuit.

[0013] Figure 3This is a plan view showing an example of a structure in which the horizontal two-point circuit breaker 100 is used in a three-phase three-wire circuit.

[0014] Figure 4 1 is a plan view showing an example of the first horizontal two-point circuit breaker 100A transitioning from an open state to a closed state.

[0015] Figure 5 1 is a plan view showing an example of the first horizontal two-point circuit breaker 100A transitioning from an open state to a closed state.

[0016] Figure 6 1 is a plan view showing an example of the first horizontal two-point circuit breaker 100A transitioning from an open state to a closed state.

[0017] Figure 7 1 is a plan view showing an example of the first horizontal two-point circuit breaker 100A transitioning from an open state to a closed state.

[0018] Figure 8 It is a perspective view showing an example of the structure of the fixed contact portion 122 .

[0019] Figure 9 It is a perspective view showing an example of the structure of the movable contact portion 134 .

[0020] Figure 10 1 is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 when the state transitions from the open state to the closed state.

[0021] Figure 11 Yes Figure 10 A plan view showing the relationship between the fixed contact portion 122 and the movable contact portion 134 in the state shown.

[0022] Figure 12 1 is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 when the state transitions from the open state to the closed state.

[0023] Figure 13 Yes Figure 12 A cross-sectional view of essential parts showing the relationship between the fixed contact portion 122 and the movable contact portion 134 in the state shown.

[0024] Figure 14 1 is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 when the state transitions from the open state to the closed state.

[0025] Figure 15 Yes Figure 14 A cross-sectional view of essential parts showing the relationship between the fixed contact portion 122 and the movable contact portion 134 in the state shown.

[0026] Figure 16 1 is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 when the state transitions from the open state to the closed state.

[0027] Figure 17 Yes Figure 16 A cross-sectional view of essential parts showing the relationship between the fixed contact portion 122 and the movable contact portion 134 in the state shown.

[0028] Figure 18 It is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 in the closed state.

[0029] Figure 19 1 is a cross-sectional view of essential parts showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 in the closed state.

[0030] Figure 20 1 is a plan view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 in the closed state.

[0031] Figure 21 Yes Figure 20 The diagram of the AA section is shown.

[0032] Figure 22 It is a perspective view of the main parts showing an example of a mechanism for adjusting the pressing force in the first horizontal two-point circuit breaker 100A.

[0033] Figure 23 It is a plan view of the main parts showing an example of a mechanism for adjusting the pressing force in the first horizontal two-point circuit breaker 100A.

[0034] Figure 24 It is a perspective view of the main parts showing an example of a mechanism for adjusting the pressing force in the second horizontal two-point circuit breaker 100B.

[0035] Figure 25 It is a side cross-sectional view of a main part showing an example of a mechanism for adjusting the pressing force in the second horizontal two-point circuit breaker 100B.

[0036] Figure 26 It is a perspective view of the main parts showing an example of a mechanism for adjusting the pressing force in the second horizontal two-point circuit breaker 100B.

[0037] Figure 27 It is a side cross-sectional view of a main part showing an example of a mechanism for adjusting the pressing force in the second horizontal two-point circuit breaker 100B.

[0038] Figure 28It is a perspective view of the main parts showing an example of a mechanism for adjusting the pressing force in the third horizontal two-point circuit breaker 100C.

[0039] Figure 29 It is a side cross-sectional view of a main part showing an example of a mechanism for adjusting the pressing force in the third horizontal two-point circuit breaker 100C.

[0040] Figure 30 It is a perspective view of the main parts showing an example of a mechanism for adjusting the pressing force in the third horizontal two-point circuit breaker 100C.

[0041] Figure 31 It is a side cross-sectional view of a main part showing an example of a mechanism for adjusting the pressing force in the third horizontal two-point circuit breaker 100C.

[0042] Figure 32 1 is a diagram showing an example of a method of measuring a force for separating the movable contact portion 134 from the fixed contact portion 122 in a closed state.

[0043] Figure 33 This is a flowchart showing an example of a procedure for adjusting the pressing force in the horizontal two-point circuit breaker 100 used in a three-phase three-wire circuit. DETAILED DESCRIPTION

[0044] The present invention will be described below by way of embodiments of the invention, but the following embodiments do not limit the invention as defined in the claims. Furthermore, not all combinations of features described in the embodiments are necessarily essential to the solution provided by the invention.

[0045] In this specification, one side parallel to the height direction is referred to as "upper," and the other side is referred to as "lower." In this specification, one of the two main surfaces of a component is referred to as the "upper surface," and the other is referred to as the "lower surface." The directions of "upper," "lower," "upper surface," and "lower surface" are not limited to the direction of gravity or the orientation of the component relative to a base during installation.

[0046] Figure 1 This is a front view showing an example of the structure of a horizontal two-point circuit breaker 100. This circuit breaker 100 is an air switch device used to open and close a charged circuit at rated voltage, not primarily for opening and closing load current. It includes a base 110, two fixed portions 120, and a movable portion 130.

[0047] The base 110 is a horizontal member located at the bottom of the horizontal two-point circuit breaker 100 and supporting the weight of the fixed portion 120 and the movable portion 130. The base 110 is provided to extend in the horizontal direction.

[0048] The fixing portion 120 is a unit for fixing the fixed contact portion 122. The fixing portion 120 is provided on both sides of the movable portion 130 in the longitudinal direction of the upper surface of the base 110. Figure 1 In the illustrated example, the fixing portions 120 are provided at both ends in the longitudinal direction of the upper surface of the base 110. The fixing portions 120 include a fixing insulator 121 and a fixing contact portion 122.

[0049] The fixed insulator 121 is a columnar insulating support extending in the vertical direction, and is composed of an insulator for insulating and supporting an electric conductor and a fitting assembled integrally with the insulator. Figure 1 In the illustrated example, the fixed insulator 121 is fixed to the upper surface of the base 110 .

[0050] The fixed contact portion 122 is a component that serves as a fixed electrical contact in the horizontal two-point circuit breaker 100. Figure 1 In the illustrated example, the fixed contact portion 122 is fixed to the fixed insulator 121 .

[0051] The movable portion 130 is a unit that moves the movable contact portion 134. The movable portion 130 is provided between the two fixed portions 120 in the longitudinal direction of the upper surface of the base 110. Figure 1 In the illustrated example, the movable portion 130 is provided at the longitudinal center of the upper surface of the base 110. The movable portion 130 includes a rotating insulator 131, a rotating plate 132, a blade 133, and two movable contact portions 134.

[0052] The rotating insulator 131 is a columnar insulating support extending in the vertical direction, and is composed of an insulator for insulating and supporting an electrical conductor and a fitting assembled with the insulator. The rotating insulator 131 is configured to be rotatable about a main axis AX extending in the vertical direction as a rotation axis. Figure 1 In the example shown, the rotary insulator 131 is fixed to the upper surface of the base 110 .

[0053] The rotating plate 132 is a disk-shaped member that rotates the rotating insulator 131. The rotating plate 132 is fixed to the rotating insulator 131 so that the central axis perpendicular to the main surface of the rotating plate 132 and the main axis AX of the rotating insulator 131 overlap. Figure 1 In the example shown, the rotating plate 132 is fixed to the lower end portion of the rotating insulator 131 .

[0054] The blade 133 is a long member that supports the movable contact portion 134. The blade 133 is fixed to the rotary insulator 131 so that the main surface of the blade 133 is in the horizontal direction. Figure 1In the illustrated example, in the blade 133 , the center portion in the longitudinal direction of the blade 133 is fixed to the rotary insulator 131 .

[0055] The movable contact portion 134 is a component that becomes a movable electrical contact in the horizontal two-point circuit breaker 100. Figure 1 In the illustrated example, movable contact portions 134 are provided at both ends of blade 133 in the longitudinal direction. The length of blade 133 is set so that fixed contact portion 122 and movable contact portion 134 contact each other in the closed circuit state. When movable contact portion 134 contacts fixed contact portion 122, horizontal two-point circuit breaker 100 enters the closed circuit state. When movable contact portion 134 separates from fixed contact portion 122, horizontal two-point circuit breaker 100 enters the open circuit state.

[0056] Figure 2 This is a perspective diagram showing an example of a configuration in which a horizontal two-point circuit breaker 100 is used in a three-phase, three-wire circuit. A three-phase, three-wire circuit is a circuit in which three-phase AC power is supplied from the secondary side of a transformer at a substation via distribution lines. This configuration for a three-phase, three-wire circuit includes three horizontal two-point circuit breakers 100: a first horizontal two-point circuit breaker 100A, a second horizontal two-point circuit breaker 100B, and a third horizontal two-point circuit breaker 100C. In the following description, the first, second, and third horizontal two-point circuit breakers 100A, 100B, and 100C are collectively referred to as horizontal two-point circuit breakers 100 unless otherwise specified.

[0057] The first horizontal two-point circuit breaker 100A is a circuit breaker corresponding to the first phase of the three-phase three-wire system. The second horizontal two-point circuit breaker 100B is a circuit breaker corresponding to the second phase of the three-phase three-wire system. The third horizontal two-point circuit breaker 100C is a circuit breaker corresponding to the third phase of the three-phase three-wire system. The three horizontal two-point circuit breakers 100 are arranged so that when each horizontal two-point circuit breaker 100 is in the closed circuit state, the length direction of the blades 133 of each horizontal two-point circuit breaker 100 is parallel. Figure 2 In the illustrated example, the first horizontal two-point circuit breaker 100A, the second horizontal two-point circuit breaker 100B, and the third horizontal two-point circuit breaker 100C are arranged in this order.

[0058] The rotating plate 132 of the first horizontal two-point circuit breaker 100A is connected to the power unit 200 via the first link mechanism LM1. The power unit 200 is a power source for actuating the movable contact 134 of the first horizontal two-point circuit breaker 100A, the movable contact 134 of the second horizontal two-point circuit breaker 100B, and the movable contact 134 of the third horizontal two-point circuit breaker 100C. The power unit 200 is provided near the first horizontal two-point circuit breaker 100A. Figure 2In the illustrated example, the power unit 200 is positioned near the rotating plate 132 of the first horizontal two-point circuit breaker 100A. The first link mechanism LM1 transmits the power of the power unit 200 to the rotating plate 132 of the first horizontal two-point circuit breaker 100A. The movable contact 134 of the first horizontal two-point circuit breaker 100A is an example of a first movable contact. The movable contact 134 of the second horizontal two-point circuit breaker 100B is an example of a second movable contact. The movable contact 134 of the third horizontal two-point circuit breaker 100C is an example of a third movable contact.

[0059] The rotating plate 132 of the second horizontal two-point circuit breaker 100B is connected to the rotating plate 132 of the first horizontal two-point circuit breaker 100A via a second link mechanism LM2. The second link mechanism LM2 transmits the power of the power unit 200 to the rotating plate 132 of the second horizontal two-point circuit breaker 100B. The second link mechanism LM2 includes a first cable W1 and a second cable W2. The first cable W1 and the second cable W2 are cables that transmit movement in both the push and pull directions. One end of the first cable W1 and the other end of the first cable W1 and the second cable W2 are each connected to the rotating plate 132 of the first horizontal two-point circuit breaker 100A and the other end to the rotating plate 132 of the second horizontal two-point circuit breaker 100B. The first cable W1 and the second cable W2 are connected so that there is no slack.

[0060] The rotating plate 132 of the third horizontal two-point circuit breaker 100C is connected to the rotating plate 132 of the second horizontal two-point circuit breaker 100B via the third link mechanism LM3. The third link mechanism LM3 transmits the power of the power unit 200 to the rotating plate 132 of the third horizontal two-point circuit breaker 100C. The third link mechanism LM3 includes a third cable W3 and a fourth cable W4. The third cable W3 and the fourth cable W4 are cables that transmit movement in both the push and pull directions. The third cable W3 and the fourth cable W4 each have one end connected to the rotating plate 132 of the second horizontal two-point circuit breaker 100B and the other end connected to the rotating plate 132 of the third horizontal two-point circuit breaker 100C. The third cable W3 and the fourth cable W4 are connected so that there is no slack.

[0061] Figure 3 This is a plan view showing an example of a structure in which the horizontal two-point circuit breaker 100 is used in a three-phase three-wire circuit. Figures 4 to 7 1 is a plan view showing an example of the first horizontal two-point circuit breaker 100A transitioning from an open state to a closed state.

[0062] The power unit 200 includes a motor (not shown). Figure 3 In the example shown, the motor is arranged with the axis S1 along the vertical direction.

[0063] The rotating plate 132 of the first horizontal two-point circuit breaker 100A, the second horizontal two-point circuit breaker 100B, and the third horizontal two-point circuit breaker 100C includes a first arm 132A and a second arm 132B. The first arm 132A and the second arm 132B are members that protrude radially outward from the main surface of the rotating plate 132. The first arm 132A and the second arm 132B are positioned on opposite sides of each other with a central axis perpendicular to the main surface of the rotating plate 132 interposed therebetween.

[0064] The rotating plate 132 of the first horizontal two-point circuit breaker 100A includes a third arm 132C. The third arm 132C is a member that protrudes radially outward from the main surface of the rotating plate 132. The third arm 132C is positioned so that the angle formed by a line along the protruding direction of the first arm 132A and a line along the protruding direction of the third arm 132C is acute.

[0065] The first link mechanism LM1 includes a plurality of links. Figure 3 In the illustrated example, the first link mechanism LM1 includes a first link L1 and a second link L2 .

[0066] One end of the first link L1 is fixed to the motor shaft S1. The other end of the first link L1 is rotatably connected to one end of the second link L2 via a first joint J1. The other end of the second link L2 is rotatably connected to the third arm 132C of the rotating plate 132 of the first horizontal two-point circuit breaker 100A via a second joint J2.

[0067] like Figure 4 As shown, when the horizontal two-point circuit breaker 100 is in the open state, when the shaft S1 of the motor rotates clockwise when viewed from above, the first connecting rod L1 rotates clockwise along the horizontal plane with the shaft S1 as the axis. Figures 4 to 7 As shown in sequence, when the first link L1 rotates clockwise, the second link L2 moves relatively in a manner of pulling the third arm 132C of the rotating plate 132 of the first horizontal two-point circuit breaker 100A along the horizontal plane. Figures 4 to 7 As shown in sequence, when the third arm 132C is pulled by the second link L2, the rotating plate 132 of the first horizontal two-point circuit breaker 100A rotates clockwise. When the rotating plate 132 of the first horizontal two-point circuit breaker 100A rotates clockwise, the rotating insulator 131 of the first horizontal two-point circuit breaker 100A rotates clockwise. Figures 4 to 7 As shown in sequence, when the rotary insulator 131 of the first horizontal two-point circuit breaker 100A rotates clockwise, the blade 133 of the first horizontal two-point circuit breaker 100A rotates clockwise along the horizontal plane. Figure 7As shown, when the blade 133 rotates until the movable contact portion 134 contacts the fixed contact portion 122, the first horizontal two-point circuit breaker 100A enters the closed state. The fixed contact portion 122 of the first horizontal two-point circuit breaker 100A is an example of a first fixed contact portion.

[0068] When the horizontal two-point circuit breaker 100 is in the closed state, when the motor shaft S1 rotates clockwise when viewed from above, the first link L1 rotates clockwise along the horizontal plane about the shaft S1. As the first link L1 rotates clockwise, the second link L2 moves relative to the first horizontal two-point circuit breaker 100A, pushing the third arm 132C of the rotating plate 132 along the horizontal plane. When the third arm 132C is pushed by the second link L2, the rotating plate 132 of the first horizontal two-point circuit breaker 100A rotates counterclockwise. As the rotating plate 132 of the first horizontal two-point circuit breaker 100A rotates counterclockwise, the rotating insulator 131 of the first horizontal two-point circuit breaker 100A rotates counterclockwise. As the rotating insulator 131 of the first horizontal two-point circuit breaker 100A rotates counterclockwise, the blade 133 of the first horizontal two-point circuit breaker 100A rotates counterclockwise along the horizontal plane. When the blade 133 rotates until the movable contact portion 134 leaves the fixed contact portion 122 , the first horizontal two-point circuit breaker 100A enters the open state.

[0069] The second link mechanism LM2 includes a plurality of links. Figure 3 In the illustrated example, the second link mechanism LM2 includes a third link L3 , a fourth link L4 , a fifth link L5 , and a sixth link L6 .

[0070] The third link L3 is rotatably connected to the first arm 132A of the rotating plate 132 of the first horizontal two-point circuit breaker 100A via a third joint J3. The fourth link L4 is rotatably connected to the second arm 132B of the rotating plate 132 of the first horizontal two-point circuit breaker 100A via a fourth joint J4. The fifth link L5 is rotatably connected to the first arm 132A of the rotating plate 132 of the second horizontal two-point circuit breaker 100B via a fifth joint J5. The sixth link L6 is rotatably connected to the second arm 132B of the rotating plate 132 of the second horizontal two-point circuit breaker 100B via a sixth joint J6. One end of the first cable W1 is fixed to the third link L3, and the other end is fixed to the fifth link L5. One end of the second cable W2 is fixed to the fourth link L4, and the other end is fixed to the sixth link L6.

[0071] When the horizontal two-point circuit breaker 100 is in the open state, when the rotating plate 132 of the first horizontal two-point circuit breaker 100A rotates clockwise when viewed from above, the third link L3 moves relative to the first cable W1 by pulling it. Meanwhile, the fourth link L4 moves relative to the second cable W2 by pushing it. When the first cable W1 is pulled by the third link L3, the fifth link L5 moves relative to the second horizontal two-point circuit breaker 100B by pulling the first arm 132A of the rotating plate 132 along the horizontal plane. Meanwhile, when the second cable W2 is pushed by the fourth link L4, the sixth link L6 moves relative to the second horizontal two-point circuit breaker 100B by pushing the second arm 132B of the rotating plate 132 along the horizontal plane. When the first arm 132A is pulled by the fifth link L5 and the second arm 132B is pushed by the sixth link L6, the rotating plate 132 of the second horizontal two-point circuit breaker 100B rotates clockwise. When the rotating plate 132 of the second horizontal two-point circuit breaker 100B rotates clockwise, the rotating insulator 131 of the second horizontal two-point circuit breaker 100B also rotates clockwise. When the rotating insulator 131 of the second horizontal two-point circuit breaker 100B rotates clockwise, the blade 133 of the second horizontal two-point circuit breaker 100B rotates clockwise along the horizontal plane. When the blade 133 rotates until the movable contact portion 134 contacts the fixed contact portion 122, the second horizontal two-point circuit breaker 100B enters the closed state. The fixed contact portion 122 of the second horizontal two-point circuit breaker 100B is an example of a second fixed contact portion.

[0072] When the horizontal two-point circuit breaker 100 is in the closed state, when the rotating plate 132 of the first horizontal two-point circuit breaker 100A rotates counterclockwise when viewed from above, the third link L3 moves relative to the first cable W1 by pushing it. Meanwhile, the fourth link L4 moves relative to the second cable W2 by pulling it. When the first cable W1 is pushed by the third link L3, the fifth link L5 moves relative to the second horizontal two-point circuit breaker 100B by pushing the first arm 132A of the rotating plate 132 along the horizontal plane. When the second cable W2 is pulled by the fourth link L4, the sixth link L6 moves relative to the second horizontal two-point circuit breaker 100B by pulling the second arm 132B of the rotating plate 132 along the horizontal plane. When the first arm 132A is pushed by the fifth link L5 and the second arm 132B is pulled by the sixth link L6, the rotating plate 132 of the second horizontal two-point circuit breaker 100B rotates counterclockwise. When the rotating plate 132 of the second horizontal two-point circuit breaker 100B rotates counterclockwise, the rotating insulator 131 of the second horizontal two-point circuit breaker 100B also rotates counterclockwise. When the rotating insulator 131 of the second horizontal two-point circuit breaker 100B rotates counterclockwise along the horizontal plane, the blade 133 of the second horizontal two-point circuit breaker 100B rotates counterclockwise. When the blade 133 rotates until the movable contact portion 134 separates from the fixed contact portion 122, the second horizontal two-point circuit breaker 100B enters the open state.

[0073] The third link mechanism LM3 has a plurality of links. Figure 3 In the illustrated example, the third link mechanism LM3 includes a seventh link L7 , an eighth link L8 , a ninth link L9 , and a tenth link L10 .

[0074] The seventh link L7 is rotatably connected to the first arm 132A of the rotating plate 132 of the second horizontal two-point circuit breaker 100B via the fifth joint J5. The eighth link L8 is rotatably connected to the second arm 132B of the rotating plate 132 of the second horizontal two-point circuit breaker 100B via the sixth joint J6. The ninth link L9 is rotatably connected to the first arm 132A of the rotating plate 132 of the third horizontal two-point circuit breaker 100C via the seventh joint J7. The tenth link L10 is rotatably connected to the second arm 132B of the rotating plate 132 of the third horizontal two-point circuit breaker 100C via the eighth joint J8. One end of the third cable W3 is fixed to the seventh link L7, and the other end is fixed to the ninth link L9. One end of the fourth cable W4 is fixed to the eighth link L8, and the other end is fixed to the tenth link L10.

[0075] When the horizontal two-point circuit breaker 100 is in the open state, when the rotating plate 132 of the second horizontal two-point circuit breaker 100B rotates clockwise when viewed from above, the seventh link L7 moves relative to the rotating plate 132 by pulling the third cable W3. Meanwhile, the eighth link L8 moves relative to the rotating plate 132 by pushing the fourth cable W4. When the third cable W3 is pulled by the seventh link L7, the ninth link L9 moves relative to the rotating plate 132 of the third horizontal two-point circuit breaker 100C by pulling the first arm 132A horizontally. Meanwhile, when the fourth cable W4 is pushed by the sixth link L6, the tenth link L10 moves relative to the rotating plate 132 of the third horizontal two-point circuit breaker 100C by pushing the second arm 132B horizontally. When the first arm 132A is pulled by the ninth link L9 and the second arm 132B is pushed by the tenth link L10, the rotating plate 132 of the third horizontal two-point circuit breaker 100C rotates clockwise. When the rotating plate 132 of the third horizontal two-point circuit breaker 100C rotates clockwise, the rotating insulator 131 of the third horizontal two-point circuit breaker 100C also rotates clockwise. When the rotating insulator 131 of the third horizontal two-point circuit breaker 100C rotates clockwise, the blade 133 of the third horizontal two-point circuit breaker 100C rotates clockwise along the horizontal plane. When the blade 133 rotates until the movable contact portion 134 contacts the fixed contact portion 122, the third horizontal two-point circuit breaker 100C enters the closed state. The fixed contact portion 122 of the third horizontal two-point circuit breaker 100C is an example of a third fixed contact portion.

[0076] When the horizontal two-point circuit breaker 100 is in the closed state, when the rotating plate 132 of the second horizontal two-point circuit breaker 100B rotates counterclockwise when viewed from above, the seventh link L7 moves relative to the breaker, pushing the third cable W3. Meanwhile, the eighth link L8 moves relative to the breaker, pulling the fourth cable W4. When the third cable W3 is pushed by the seventh link L7, the ninth link L9 moves relative to the breaker, pushing the first arm 132A of the rotating plate 132 of the third horizontal two-point circuit breaker 100C along the horizontal plane. Meanwhile, when the fourth cable W4 is pulled by the eighth link L8, the tenth link L10 moves relative to the breaker, pulling the second arm 132B of the rotating plate 132 of the third horizontal two-point circuit breaker 100C along the horizontal plane. When the first arm 132A is pushed by the ninth link L9 and the second arm 132B is pulled by the tenth link L10, the rotating plate 132 of the third horizontal two-point circuit breaker 100C rotates counterclockwise. When the rotating plate 132 of the third horizontal two-point circuit breaker 100C rotates counterclockwise, the rotating insulator 131 of the third horizontal two-point circuit breaker 100C also rotates counterclockwise. When the rotating insulator 131 of the third horizontal two-point circuit breaker 100C rotates counterclockwise, the blade 133 of the third horizontal two-point circuit breaker 100C rotates counterclockwise along the horizontal plane. When the blade 133 rotates until the movable contact portion 134 separates from the fixed contact portion 122, the third horizontal two-point circuit breaker 100C enters the open state.

[0077] Figure 8 1 is a perspective view showing an example of the structure of the fixed contact portion 122. The fixed contact portion 122 includes a terminal block 122T, an upper fixed contact 122U, and a lower fixed contact 122L. For example, the fixed contact portion 122 includes a plurality of upper fixed contacts 122U and a plurality of lower fixed contacts 122L. Figure 8 In the illustrated example, the fixed contact portion 122 includes three upper fixed contacts 122U and three lower fixed contacts 122L.

[0078] The terminal block 122T is a component for fixing the upper fixed contact 122U and the lower fixed contact 122L. The terminal block 122T is fixed to the fixed insulator 121. Figure 8 In the example shown, the terminal block 122T is fixed to the upper end of the fixed insulator 121. The terminal block 122T includes a stopper 122S. The stopper 122S is used to stop the movable contact 134 at an appropriate position when the horizontal two-point circuit breaker 100 is in the closed state. The appropriate position where the movable contact 134 stops is the position where the movable contact 134 contacts and stops, as designed, with the upper fixed contact 122U and the lower fixed contact 122L.

[0079] The upper fixed contact 122U is a plate-shaped fixed contact having a main surface that contacts the upper end of the movable contact portion 134. The upper fixed contact 122U is fixed to the terminal block 122T in such a manner that the main surface of the upper fixed contact 122U is along a horizontal plane. Figure 8 As shown, the upper fixed contact 122U has one end in the longitudinal direction facing the main surface of the lower fixed contact 122L, and the other end is fixed to the terminal block 122T.

[0080] The lower fixed contact 122L is a plate-shaped fixed contact having a main surface that contacts the lower end of the movable contact portion 134. The lower fixed contact 122L is fixed to the terminal block 122T in such a manner that the main surface of the lower fixed contact 122L is along a horizontal plane. Figure 8 As shown, the lower fixed contact 122L has one end in the longitudinal direction facing the main surface of the upper fixed contact 122U, and the other end is fixed to the terminal block 122T.

[0081] Figure 9 134 is a perspective view showing an example of the structure of the movable contact portion 134. The movable contact portion 134 includes a base portion 134B, a main contact 134M, an auxiliary contact 134S, and a contact portion 134C.

[0082] The base portion 134B is a member serving as a foundation of the movable contact portion 134 .

[0083] The main contact 134M is a plate-shaped movable contact that switches the main current. The main contact 134M is provided so that two opposing side surfaces different from the main surface of the main contact 134M come into contact with the upper fixed contact 122U and the lower fixed contact 122L. Figure 9 In the example shown, the main contact 134M is fixed to the base 134B with its main surface aligned with a vertical plane. The main contact 134M includes two electrical contact portions 134E. The electrical contact portions 134E serve as electrical contacts for the upper fixed contact 122U and the lower fixed contact 122L.

[0084] Here, when the horizontal two-point circuit breaker 100 changes from the open state to the closed state, an arc is generated when the contacts come into contact with each other. In addition, when the horizontal two-point circuit breaker 100 changes from the closed state to the open state, an arc is generated when the contacts separate from each other.

[0085] The auxiliary contact 134S is a plate-shaped contact that contacts the upper fixed contact 122U and the lower fixed contact 122L before the main contact 134M when switching from the open state to the closed state, and receives the arc. The auxiliary contact 134S is provided so that the main surface of the auxiliary contact 134S is along the vertical plane. Figure 9In the example shown, the auxiliary contact 134S is fixed to the main surface of the main contact 134M. The width of the main surface of the auxiliary contact 134S gradually increases in height from the front end on the side closest to the fixed contact portion 122 to the rear end. The width of the widest portion of the main surface of the auxiliary contact 134S is wider than the distance between the two electrical contact points of the main contact 134M.

[0086] The contact portion 134C is fixed to the base 134B so as to abut against the stopper 122S of the fixed contact portion 122 when the horizontal two-point circuit breaker 100 is in the closed state.

[0087] Figure 10 1 is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 when the state transitions from the open state to the closed state. Figure 11 Yes Figure 10 A plan view showing the relationship between the fixed contact portion 122 and the movable contact portion 134 in the state shown. Figure 12 1 is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 when the state transitions from the open state to the closed state. Figure 13 Yes Figure 12 A cross-sectional view of essential parts showing the relationship between the fixed contact portion 122 and the movable contact portion 134 in the state shown. Figure 14 1 is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 when the state transitions from the open state to the closed state. Figure 15 Yes Figure 14 A cross-sectional view of essential parts showing the relationship between the fixed contact portion 122 and the movable contact portion 134 in the state shown. Figure 16 1 is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 when the state transitions from the open state to the closed state. Figure 17 Yes Figure 16 A cross-sectional view of essential parts showing the relationship between the fixed contact portion 122 and the movable contact portion 134 in the state shown. Figure 18 It is a perspective view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 in the closed state. Figure 19 1 is a cross-sectional view of essential parts showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 in the closed state. Figure 20 1 is a plan view showing an example of the relationship between the fixed contact portion 122 and the movable contact portion 134 in the closed state. Figure 21 Yes Figure 20 The diagram of the AA section is shown.

[0088] When changing from open circuit to closed circuit, Figure 10 、 Figure 12 、 Figure 14 、 Figure 16 as well as Figure 18 As shown in sequence, the movable contact portion 134 rotates clockwise along the horizontal plane.

[0089] like Figure 13 and Figure 14 As shown, when the circuit changes from the open state to the closed state, the auxiliary contact 134S contacts the upper fixed contact 122U and the lower fixed contact 122L before the main contact 134M. Figure 15 and Figure 17 As shown, the upper fixed contact 122U is pushed upward by the auxiliary contact 134S as the movable contact 134 rotates. Similarly, the lower fixed contact 122L is pushed downward by the auxiliary contact 134S as the movable contact 134 rotates.

[0090] like Figure 15 、 Figure 17 as well as Figure 19 As shown, the upper fixed contact 122U returns to its original position from its pushed-up position as the movable contact portion 134 pivots and releases contact with the auxiliary contact 134S. Similarly, the lower fixed contact 122L returns to its original position from its pushed-down position as the movable contact portion 134 pivots and releases contact with the auxiliary contact 134S. Upon returning to their original positions, the upper and lower fixed contacts 122U, 122L contact the electrical contact portion 134E of the main contact 134M.

[0091] like Figure 18 and Figure 20 As shown, the movable contact portion 134 stops at an appropriate position where the contact portion 134C of the movable contact portion 134 abuts against the stopper portion 122S of the fixed contact portion 122 .

[0092] Figure 8 、 Figure 10 as well as Figure 12 The hatching on the upper surface of the lower fixed contact 122L shown in the figure indicates wear caused by contact and friction with the auxiliary contact 134S and the main contact 134M. Similarly, the lower surface of the upper fixed contact 122U wears due to contact and friction with the auxiliary contact 134S and the main contact 134M. If the surfaces of the upper and lower fixed contacts 122U and 122L wear, frictional resistance increases. Repeated opening and closing may cause the movable contact 134 to fail to stop in the proper position when transitioning from the open state to the closed state.

[0093] Therefore, the operator adjusts the pressing force when the contact portion 134C contacts the stopper 122S to stop the movable contact portion 134 at an appropriate position when switching from the open state to the closed state. The pressing force is the force with which the contact portion 134C presses against the stopper 122S in the closed state.

[0094] Figure 22 It is a perspective view of the main parts showing an example of a mechanism for adjusting the pressing force in the first horizontal two-point circuit breaker 100A. Figure 23 It is a plan view of the main parts showing an example of a mechanism for adjusting the pressing force in the first horizontal two-point circuit breaker 100A.

[0095] exist Figure 22 and Figure 23 In the example shown, the second link L2 of the first link mechanism LM1 also serves as a mechanism for adjusting the pressing force in the first horizontal two-point circuit breaker 100A. The second link L2 includes a first member C1, a second member C2, a third member C3, a fourth member C4, and a fifth member C5.

[0096] The first member C1 is a rectangular parallelepiped member having a hollow portion. The first member C1 includes a first hole formed at one end in the longitudinal direction. The first hole of the first member C1 extends from an opening formed in the upper surface of the first member C1 to an opening formed in the lower surface. The first joint J1 passes through the first hole of the first member C1. Furthermore, the first member C1 includes a second hole formed at the other end in the longitudinal direction. The second hole of the first member C1 is formed within the first member C1 along the longitudinal direction of the first member C1, extending from an opening formed in a side surface in the width direction.

[0097] The second member C2 is a bolt-shaped member with a thread cut into one end of a metal round bar. The second hole portion of the first member C1 has a thread cut into the inner surface so that the second member C2 can be connected. The second member C2 is connected to the second hole portion of the first member C1.

[0098] The third member C3 is a nut-shaped member that fits with the second member C2 to fasten the second member C2 to the first member C1. The third member C3 has a hexagonal outer shape and has threads cut on its inner surface.

[0099] The fourth and fifth members C4 and C5 are plate-shaped members that serve as bolt heads for the second member C2. The fourth and fifth members C4 and C5 are fixed to the ends of the second member C2 with their main surfaces facing each other. Furthermore, the fourth and fifth members C4 and C5 have openings at their other main surface ends. The second joint J2 passes through these openings.

[0100] When adjusting the pressing force in the first horizontal two-point circuit breaker 100A, the operator first pulls out the second joint J2 connecting the second link L2 and the third arm 132C to release the connection.

[0101] Next, the operator rotates the third member C3 to loosen the fastening of the second member C2 to the first member C1.

[0102] Next, the operator grasps the fourth and fifth members C4 and C5 and rotates the second member C2 to adjust the protruding length of the second member C2 protruding outward from the second hole portion of the first member C1, thereby adjusting the pressing force. After the operator adjusts the protruding length of the second member C2 to the desired length, the operator adjusts the main surfaces of the fourth and fifth members C4 and C5 to be aligned with the horizontal plane, so that the second link L2 can be reconnected to the third arm 132C.

[0103] For example, to increase the pressing force in the first horizontal two-point circuit breaker 100A, the operator rotates the second member C2 to shorten its protruding length. Shortening the protruding length of the second member C2 shortens the length of the second link L2. Shortening the second link L2 increases the force with which the second link L2 pulls the third arm 132C relative to the motor's rotation, increasing the pressing force in the first horizontal two-point circuit breaker 100A.

[0104] For example, to reduce the pressing force in the first horizontal two-point circuit breaker 100A, the operator rotates the second member C2 to increase its protruding length. Increasing the protruding length of the second member C2 increases the length of the second link L2. This lengthening of the second link L2 reduces the force with which the second link L2 pulls the third arm 132C relative to the rotation of the motor, reducing the pressing force in the first horizontal two-point circuit breaker 100A.

[0105] Next, when the worker adjusts the protruding length of the second member C2 to a desired length, the worker rotates the third member C3 to fasten the second member C2 to the first member C1 .

[0106] Next, the operator restores the second joint J2 to its original state, and connects the second link L2 of the first link mechanism LM1 to the third arm 132C of the rotating plate 132 of the first horizontal two-point circuit breaker 100A.

[0107] Figure 24 and Figure 26 It is a perspective view of the main parts showing an example of a mechanism for adjusting the pressing force in the second horizontal two-point circuit breaker 100B. Figure 25 and Figure 27 It is a side cross-sectional view of a main part showing an example of a mechanism for adjusting the pressing force in the second horizontal two-point circuit breaker 100B.

[0108] exist Figures 24 to 27 In the illustrated example, the third link L3 and fourth link L4 of the second link mechanism LM2 also serve as a mechanism for adjusting the pressing force in the second horizontal two-point circuit breaker 100B. The third link L3 includes a sixth member C6, a seventh member C7, and an eighth member C8. The fourth link L4 includes a ninth member C9, a tenth member C10, and an eleventh member C11.

[0109] The sixth member C6 is fixed to the first cable W1. The cross-sectional shape of the sixth member C6, when cut along its length, is U-shaped, with an open end and a base end. One end of the first cable W1 is fixed to the open end of the sixth member C6. The sixth member C6 has a hole formed in the side surface of the base end. The hole in the sixth member C6 extends from the outside to the inside of the U-shaped sixth member C6. The third joint J3 passes through the inside of the U-shaped sixth member C6 and is secured to the desired position along the length of the sixth member C6 using a nut or the like.

[0110] The seventh member C7 is a bolt-like member made of a round metal rod with threads cut into one end and a hexagonal head, or similar, larger than its diameter, at the other end. The hole formed at the base end of the sixth member C6 is threaded on its inner surface to allow it to engage with the seventh member C7. The seventh member C7 is threaded into the hole from the outside to the inside of the sixth member C6. The seventh member C7 is screwed into place until its tip abuts against the third joint J3.

[0111] The eighth member C8 is a nut-shaped member that fits with the seventh member C7 to fasten the seventh member C7 to the sixth member C6. The eighth member C8 has a hexagonal outer shape and a threaded inner surface.

[0112] The ninth member C9 is fixed to the second cable W2. The ninth member C9 has a U-shaped cross-section when cut along the longitudinal direction, with an open end and a base end.

[0113] One end of the second cable W2 is fixed to the open end of the ninth member C9. The ninth member C9 has a hole formed in the side surface of its base end. The hole in the ninth member C9 extends from the outside to the inside of the U-shaped ninth member C9. The fourth connector J4 passes through the inside of the U-shaped ninth member C9 and is secured to the desired position along the length of the ninth member C9 using a nut or the like.

[0114] The tenth member C10 is a bolt-like member made of a round metal rod with threads cut into one end and a hexagonal head, or similar, larger than its diameter, at the other end. The hole formed at the base end of the ninth member C9 is threaded on its inner surface to allow it to engage with the tenth member C10. The tenth member C10 is threaded into the hole of the ninth member C9 from the outside to the inside. The tenth member C10 is screwed in until its tip abuts against the fourth joint J4.

[0115] The eleventh member C11 is a nut-shaped member that fits with the tenth member C10 to fasten the tenth member C10 to the ninth member C9. The outer shape of the eleventh member C11 is a hexagonal shape, etc., and a thread is cut on the inner surface.

[0116] When adjusting the pressing force in the second horizontal two-point circuit breaker 100B, the operator first rotates the eighth member C8 to loosen the fastening of the seventh member C7 to the sixth member C6.

[0117] Similarly, when adjusting the pressing force in the second horizontal two-point circuit breaker 100B, the operator rotates the eleventh member C11 to loosen the fastening of the tenth member C10 to the ninth member C9.

[0118] Next, the operator rotates the nut for the third joint J3 to loosen the fastening of the third joint J3 to the sixth member C6.

[0119] Similarly, the operator rotates the nut for the fourth joint J4 to loosen the fastening of the fourth joint J4 to the ninth member C9.

[0120] Next, the operator rotates the seventh member C7 to adjust the length of the seventh member C7 protruding outward from the hole in the sixth member C6, thereby adjusting the pressing force. In other words, the operator rotates the seventh member C7 to adjust the insertion length of the seventh member C7 from the hole in the sixth member C6 to the inside, thereby adjusting the pressing force. In other words, the operator adjusts the pressing force by adjusting the position of the third joint J3 in the longitudinal direction of the sixth member C6, which limits the protrusion and insertion lengths of the seventh member C7.

[0121] For example, to increase the pressing force in the second horizontal two-point circuit breaker 100B, the operator rotates the seventh member C7 to shorten its protruding length. In other words, the operator rotates the seventh member C7 to lengthen its insertion length. In other words, the operator adjusts the third joint J3, which limits the protruding and insertion lengths of the seventh member C7, to shift toward the open end of the sixth member C6. If the protruding length of the seventh member C7 is shortened, the length from the position of the third joint J3 to the open end of the sixth member C6 is shortened. In other words, if the insertion length of the seventh member C7 is increased, the length from the position of the third joint J3 to the open end of the sixth member C6 is shortened. In other words, if the third joint J3 is shifted toward the open end of the sixth member C6, the length from the position of the third joint J3 to the open end of the sixth member C6 is shortened. If the length from the third joint J3 to the open end of the sixth member C6 is shortened, the force pulling the first cable W1 relative to the rotation amount of the motor increases, and the pressing force in the second horizontal two-point circuit breaker 100B increases.

[0122] For example, to reduce the pressing force in the second horizontal two-point circuit breaker 100B, the operator rotates the seventh member C7 to increase its protruding length. In other words, the operator rotates the seventh member C7 to decrease its insertion length. In other words, the operator adjusts the third joint J3, which limits the protruding and insertion lengths of the seventh member C7, to shift toward the base end of the sixth member C6. If the protruding length of the seventh member C7 increases, the length from the position of the third joint J3 to the open end of the sixth member C6 increases. In other words, if the insertion length of the seventh member C7 decreases, the length from the position of the third joint J3 to the open end of the sixth member C6 increases. In other words, if the third joint J3 shifts toward the base end of the sixth member C6, the length from the position of the third joint J3 to the open end of the sixth member C6 increases. If the length from the third joint J3 to the open end of the sixth member C6 increases, the force pulling the first cable W1 relative to the rotation amount of the motor decreases, and the pressing force in the second horizontal two-point circuit breaker 100B decreases.

[0123] Similarly, the operator rotates the tenth member C10 to adjust the length of the tenth member C10 protruding outward from the hole in the ninth member C9, thereby adjusting the pressing force. In other words, the operator rotates the tenth member C10 to adjust the insertion length of the tenth member C10 from the hole in the ninth member C9 to the inside, thereby adjusting the pressing force. In other words, the operator adjusts the pressing force by adjusting the position of the fourth joint J4, which limits the protrusion and insertion lengths of the tenth member C10, in the longitudinal direction of the ninth member C9.

[0124] For example, to increase the pressing force in the second horizontal two-point circuit breaker 100B, the operator rotates the tenth member C10 to shorten its protruding length. In other words, the operator rotates the tenth member C10 to lengthen its insertion length. In other words, the operator adjusts the fourth joint J4, which limits the protruding and insertion lengths of the tenth member C10, to shift toward the open end of the ninth member C9. If the protruding length of the tenth member C10 is shortened, the length from the position of the fourth joint J4 to the open end of the ninth member C9 is shortened. In other words, if the insertion length of the tenth member C10 is increased, the length from the position of the fourth joint J4 to the open end of the ninth member C9 is shortened. In other words, if the fourth joint J4 is shifted toward the open end of the ninth member C9, the length from the position of the fourth joint J4 to the open end of the ninth member C9 is shortened. If the length from the fourth joint J4 to the open end of the ninth member C9 is shortened, the force pulling the second cable W2 relative to the rotation amount of the motor increases, and the pressing force in the second horizontal two-point circuit breaker 100B increases.

[0125] For example, to reduce the pressing force in the second horizontal two-point circuit breaker 100B, the operator rotates the tenth member C10 to increase its protruding length. In other words, the operator rotates the tenth member C10 to decrease its insertion length. In other words, the operator adjusts the fourth joint J4, which limits the protruding and insertion lengths of the tenth member C10, to shift toward the base end of the ninth member C9. If the protruding length of the tenth member C10 increases, the length from the position of the fourth joint J4 to the open end of the ninth member C9 increases. In other words, if the insertion length of the tenth member C10 decreases, the length from the position of the fourth joint J4 to the open end of the ninth member C9 increases. In other words, if the fourth joint J4 shifts toward the base end of the ninth member C9, the length from the position of the fourth joint J4 to the open end of the ninth member C9 increases. If the length from the fourth joint J4 to the open end of the ninth member C9 increases, the force pulling the second cable W2 relative to the rotation amount of the motor decreases, and the pressing force in the second horizontal two-point circuit breaker 100B decreases.

[0126] Next, after adjusting the length from the position of the third joint J3 to the open end of the sixth member C6 to a desired length, the operator rotates the nut for the third joint J3 to tighten the third joint J3 to the sixth member C6.

[0127] Similarly, after adjusting the length from the position of the fourth joint J4 to the open end of the ninth member C9 to a desired length, the operator rotates the nut for the fourth joint J4 to tighten the fourth joint J4 to the ninth member C9.

[0128] Next, the operator rotates the eighth member C8 to fasten the seventh member C7 to the sixth member C6.

[0129] Similarly, the operator rotates the eleventh member C11 to fasten the tenth member C10 to the ninth member C9.

[0130] Figure 28 and Figure 30 It is a perspective view of the main parts showing an example of a mechanism for adjusting the pressing force in the third horizontal two-point circuit breaker 100C. Figure 29 and Figure 31 It is a side cross-sectional view of a main part showing an example of a mechanism for adjusting the pressing force in the third horizontal two-point circuit breaker 100C.

[0131] exist Figures 28 to 31 In the illustrated example, the ninth and tenth links L9, L10 of the third link mechanism LM3 also serve as a mechanism for adjusting the pressing force in the third horizontal two-point circuit breaker 100C. The ninth link L9 includes a twelfth member C12, a thirteenth member C13, and a fourteenth member C14. The tenth link L10 includes a fifteenth member C15, a sixteenth member C16, and a seventeenth member C17.

[0132] The twelfth member C12 is fixed to the third cable W3. The cross-sectional shape of the twelfth member C12, when cut along its length, is U-shaped, with an open end and a base end. One end of the third cable W3 is fixed to the open end of the twelfth member C12. The twelfth member C12 has a hole formed in the side surface of the base end. The hole of the twelfth member C12 extends from the outside to the inside of the U-shaped twelfth member C12. The seventh joint J7 passes through the inside of the U-shaped twelfth member C12 and is secured to the desired position along the length of the twelfth member C12 using a nut or the like.

[0133] The thirteenth member C13 is a bolt-like member made of a round metal rod with threads cut into one end and a hexagonal head, or similar, larger than its diameter, at the other end. The hole formed at the base end of the twelfth member C12 is threaded on its inner surface to allow it to engage with the thirteenth member C13. The thirteenth member C13 is threaded through the hole in the twelfth member C12 from the outside to the inside, thereby engaging the thirteenth member C13. The thirteenth member C13 is screwed into place until its tip abuts against the seventh joint J7.

[0134] The fourteenth member C14 is a nut-shaped member that fits with the thirteenth member C13 to fasten the thirteenth member C13 to the twelfth member C12. The fourteenth member C14 has a hexagonal outer shape and has threads cut on its inner surface.

[0135] The fifteenth member C15 is fixed to the fourth cable W4. The cross-section of the fifteenth member C15, when cut along its length, is U-shaped, with an open end and a base end. One end of the fourth cable W4 is fixed to the open end of the fifteenth member C15. The fifteenth member C15 has a hole formed in the side surface of the base end. The hole of the fifteenth member C15 extends from the outside to the inside of the U-shaped fifteenth member C15. The eighth connector J8 passes through the inside of the U-shaped fifteenth member C15 and is secured to the desired position along the length of the fifteenth member C15 using a nut or the like.

[0136] The sixteenth member C16 is a bolt-like member with threads cut into one end of a round metal rod and a hexagonal head, or similar, larger than its diameter, at the other end. The hole formed at the base end of the fifteenth member C15 is threaded on its inner surface to engage the sixteenth member C16. The sixteenth member C16 is threaded through the hole in the fifteenth member C15 from the outside to the inside. The sixteenth member C16 is screwed in until its tip abuts against the eighth joint J8.

[0137] The seventeenth member C17 is a nut-shaped member that fits with the sixteenth member C16 to fasten the sixteenth member C16 to the fifteenth member C15. The seventeenth member C17 has a hexagonal outer shape and has threads cut on its inner surface.

[0138] When adjusting the pressing force in the third horizontal two-point circuit breaker 100C, the operator first rotates the fourteenth member C14 to loosen the fastening of the thirteenth member C13 to the twelfth member C12.

[0139] Similarly, when adjusting the pressing force in the third horizontal two-point circuit breaker 100C, the operator rotates the seventeenth member C17 to loosen the fastening of the sixteenth member C16 to the fifteenth member C15.

[0140] Next, the operator rotates the nut for the seventh joint J7 to loosen the fastening of the seventh joint J7 to the twelfth member C12.

[0141] Similarly, the operator rotates the nut for the eighth joint J8 to loosen the fastening of the eighth joint J8 to the fifteenth member C15.

[0142] Next, the operator rotates the thirteenth member C13 to adjust the length of the thirteenth member C13 protruding outward from the hole in the twelfth member C12, thereby adjusting the pressing force. In other words, the operator rotates the thirteenth member C13 to adjust the insertion length of the thirteenth member C13 from the hole in the twelfth member C12 to the inside, thereby adjusting the pressing force. In other words, the operator adjusts the pressing force by adjusting the position of the seventh joint J7 in the longitudinal direction of the twelfth member C12, which limits the protrusion and insertion lengths of the thirteenth member C13.

[0143] For example, to increase the pressing force in the third horizontal two-point circuit breaker 100C, the operator rotates the thirteenth member C13 to shorten its protruding length. In other words, the operator rotates the thirteenth member C13 to lengthen its insertion length. In other words, the operator adjusts the seventh joint J7, which limits the protruding and insertion lengths of the thirteenth member C13, to shift toward the open end of the twelfth member C12. If the protruding length of the thirteenth member C13 is shortened, the length from the position of the seventh joint J7 to the open end of the twelfth member C12 is shortened. In other words, if the insertion length of the thirteenth member C13 is increased, the length from the position of the seventh joint J7 to the open end of the twelfth member C12 is shortened. In other words, if the seventh joint J7 is shifted toward the open end of the twelfth member C12, the length from the position of the seventh joint J7 to the open end of the twelfth member C12 is shortened. If the length from the seventh joint J7 to the open end of the twelfth member C12 is shortened, the force pulling the third cable W3 relative to the rotation amount of the motor increases, and the pressing force in the third horizontal two-point circuit breaker 100C increases.

[0144] For example, to reduce the pressing force in the third horizontal two-point circuit breaker 100C, the operator rotates the thirteenth member C13 to increase its protruding length. In other words, the operator rotates the thirteenth member C13 to decrease its insertion length. In other words, the operator adjusts the seventh joint J7, which limits the protruding and insertion lengths of the thirteenth member C13, to shift toward the base end of the twelfth member C12. When the protruding length of the thirteenth member C13 increases, the length from the position of the seventh joint J7 to the open end of the twelfth member C12 increases. In other words, when the insertion length of the thirteenth member C13 decreases, the length from the position of the seventh joint J7 to the open end of the twelfth member C12 increases. In other words, when the seventh joint J7 shifts toward the base end of the twelfth member C12, the length from the position of the seventh joint J7 to the open end of the twelfth member C12 increases. If the length from the seventh joint J7 to the open end of the twelfth member C12 increases, the force pulling the third cable W3 relative to the rotation amount of the motor decreases, and the pressing force in the third horizontal two-point circuit breaker 100C decreases.

[0145] Similarly, the operator rotates the sixteenth member C16 to adjust the length of the sixteenth member C16 protruding outward from the hole in the fifteenth member C15, thereby adjusting the pressing force. In other words, the operator rotates the sixteenth member C16 to adjust the insertion length of the sixteenth member C16 from the hole in the fifteenth member C15 to the inside, thereby adjusting the pressing force. In other words, the operator adjusts the pressing force by adjusting the position of the eighth joint J8 in the longitudinal direction of the fifteenth member C15, which limits the protrusion and insertion lengths of the sixteenth member C16.

[0146] For example, to increase the pressing force in the third horizontal two-point circuit breaker 100C, the operator rotates the sixteenth member C16 to shorten its protruding length. In other words, the operator rotates the sixteenth member C16 to lengthen its insertion length. In other words, the operator adjusts the eighth joint J8, which limits the protruding and insertion lengths of the sixteenth member C16, to shift toward the open end of the fifteenth member C15. If the protruding length of the sixteenth member C16 is shortened, the length from the position of the eighth joint J8 to the open end of the fifteenth member C15 is shortened. In other words, if the insertion length of the sixteenth member C16 is increased, the length from the position of the eighth joint J8 to the open end of the fifteenth member C15 is shortened. In other words, if the eighth joint J8 is shifted toward the open end of the fifteenth member C15, the length from the position of the eighth joint J8 to the open end of the fifteenth member C15 is shortened. If the length from the eighth joint J8 to the open end of the fifteenth member C15 is shortened, the force pulling the fourth cable W4 relative to the rotation amount of the motor increases, and the pressing force in the third horizontal two-point circuit breaker 100C increases.

[0147] For example, to reduce the pressing force in the third horizontal two-point circuit breaker 100C, the operator rotates the sixteenth member C16 to increase its protruding length. In other words, the operator rotates the sixteenth member C16 to decrease its insertion length. In other words, the operator adjusts the eighth joint J8, which limits the protruding and insertion lengths of the sixteenth member C16, to shift toward the base end of the fifteenth member C15. If the protruding length of the sixteenth member C16 increases, the length from the position of the eighth joint J8 to the open end of the fifteenth member C15 increases. In other words, if the insertion length of the sixteenth member C16 decreases, the length from the position of the eighth joint J8 to the open end of the fifteenth member C15 increases. In other words, if the eighth joint J8 shifts toward the base end of the fifteenth member C15, the length from the position of the eighth joint J8 to the open end of the fifteenth member C15 increases. If the length from the eighth joint J8 to the open end of the fifteenth member C15 increases, the force pulling the fourth cable W4 relative to the rotation amount of the motor decreases, and the pressing force in the third horizontal two-point circuit breaker 100C decreases.

[0148] Next, the operator adjusts the length from the position of the seventh joint J7 to the open end of the twelfth member C12 to a desired length, and then rotates the nut for the seventh joint J7 to tighten the seventh joint J7 to the twelfth member C12.

[0149] Similarly, after adjusting the length from the position of the eighth joint J8 to the open end of the fifteenth member C15 to a desired length, the operator rotates the nut for the eighth joint J8 to tighten the eighth joint J8 to the fifteenth member C15.

[0150] Next, the operator rotates the fourteenth member C14 to fasten the thirteenth member C13 to the twelfth member C12.

[0151] Similarly, the operator rotates the seventeenth member C17 to fasten the sixteenth member C16 to the fifteenth member C15.

[0152] The operator adjusts the pressing force so that even if a specific force is applied to separate the movable contact portion 134 from the fixed contact portion 122 in the closed circuit state, the movable contact portion 134 will not separate from the fixed contact portion 122. The step of adjusting the pressing force in the horizontal two-point circuit breaker 100 includes the step of measuring the force required to separate the movable contact portion 134 from the fixed contact portion 122 in the closed circuit state. The operator considers the force required to separate the movable contact portion 134 from the fixed contact portion 122 in the closed circuit state to be equivalent to the pressing force and adjusts the pressing force so that the measured force is greater than the specific force. The specific force is determined by the strength of the mechanism that actuates the movable contact portion 134 and the strength of the stopper 122S in the fixed contact portion 122 against which the movable contact portion 134 presses. The inventors have verified that the appropriate pressing force is 15 kg. Therefore, the operator adjusts the pressing force so that the measured force is, for example, greater than 15 kg.

[0153] Figure 32 This is a diagram showing an example of a method for measuring the force for separating the movable contact portion 134 in the closed circuit state from the fixed contact portion 122. For example, an operator uses a spring scale G1 to measure the force for separating the movable contact portion 134 in the closed circuit state from the fixed contact portion 122. Figure 32 As shown, the operator attaches the hook of the spring scale G1 to the blade 133. The operator then stretches the spring scale G1 so that the movable contact portion 134 in the closed state is separated from the fixed contact portion 122, and measures the force for separating the movable contact portion 134 from the fixed contact portion 122.

[0154] Figure 33 This is a flowchart showing an example of the steps for adjusting the pressing force in the horizontal two-point circuit breaker 100 for a three-phase three-wire circuit. Figure 2In the case of the horizontal two-point circuit breaker 100 of the structure shown, the third horizontal two-point circuit breaker 100C receives the power of the power unit 200 via the first link mechanism LM1, the second link mechanism LM2, and the third link mechanism LM3. Therefore, if the pressing force in the third horizontal two-point circuit breaker 100C is appropriate, the pressing force in the first horizontal two-point circuit breaker 100A and the second horizontal two-point circuit breaker 100B is also appropriate. In addition, the second horizontal two-point circuit breaker 100B receives the power of the power unit 200 via the first link mechanism LM1 and the second link mechanism LM2. Therefore, if the pressing force in the second horizontal two-point circuit breaker 100B is appropriate, the pressing force in the first horizontal two-point circuit breaker 100A is also appropriate. Therefore, the operator, for example, according to Figure 33 The steps shown are for adjusting the pressing force in the horizontal two-point circuit breaker 100 in the closed state.

[0155] First, the operator measures the third force for separating the movable contact portion 134 of the third horizontal two-point circuit breaker 100C from the fixed contact portion 122 (S101). In S101, the operator measures the third force for separating the movable contact portion 134 of the third horizontal two-point circuit breaker 100C from the fixed contact portion 122 (S101). Figure 32 As shown, the force for separating the movable contact portion 134 in the closed state from the fixed contact portion 122 is measured using a spring balance G1.

[0156] Next, the operator checks whether the third force is greater than a specific force (S102). In S102, the operator checks whether the third force is greater than 15 (kg), for example.

[0157] If the third force is greater than the specific force (S102; Yes), the operator ends the Figure 33 If the third force is greater than the specific force in S102, the operator determines that the pressing force in the first horizontal two-point circuit breaker 100A, the second horizontal two-point circuit breaker 100B, and the third horizontal two-point circuit breaker 100C is appropriate.

[0158] If the third force is smaller than the specific force (S102; No), the operator measures the second force for separating the movable contact portion 134 of the second horizontal two-point circuit breaker 100B in the closed state from the fixed contact portion 122 (S103). In S103, the operator measures the second force for separating the movable contact portion 134 from the fixed contact portion 122 of the second horizontal two-point circuit breaker 100B in the closed state from the fixed contact portion 122 (S103). Figure 32 As shown, the force for separating the movable contact portion 134 in the closed state from the fixed contact portion 122 is measured using a spring balance G1.

[0159] Next, the operator checks whether the second force is greater than a specific force (S104). In S104, the operator checks whether the second force is greater than 15 (kg), for example.

[0160] If the second force is greater than the specific force (S104; Yes), the operator adjusts the pressing force in the third horizontal two-point circuit breaker 100C (S105). If the second force is greater than the specific force in S104, the operator determines that the pressing force in the first horizontal two-point circuit breaker 100A and the second horizontal two-point circuit breaker 100B is appropriate. On the other hand, if the second force is greater than the specific force in S104, the operator determines that the pressing force in the third horizontal two-point circuit breaker 100C is inappropriate. Therefore, in S105, the operator operates Figures 28 to 31 The mechanism shown is used to adjust the pressing force in the third horizontal two-point circuit breaker 100C.

[0161] After executing step S105 , the operator executes steps S101 and thereafter again.

[0162] If the second force is less than the specific force (S104; No), the operator measures the first force for separating the movable contact portion 134 of the first horizontal two-point circuit breaker 100A in the closed state from the fixed contact portion 122 (S106). In S106, the operator, for example, Figure 32 As shown, the force for separating the movable contact portion 134 in the closed state from the fixed contact portion 122 is measured using a spring balance G1.

[0163] Next, the operator checks whether the first force is greater than a specific force (S107). In S107, the operator checks whether the first force is greater than 15 (kg), for example.

[0164] If the first force is greater than the specific force (S107; Yes), the operator adjusts the pressing force in the second horizontal two-point circuit breaker 100B (S108). If the first force is greater than the specific force in S107, the operator determines that the pressing force in the first horizontal two-point circuit breaker 100A is appropriate. On the other hand, if the first force is greater than the specific force in S107, the operator determines that the pressing force in the second horizontal two-point circuit breaker 100B and the third horizontal two-point circuit breaker 100C is inappropriate. Therefore, in S108, the operator operates Figures 24 to 27 The mechanism shown is used to adjust the pressing force in the second horizontal two-point circuit breaker 100B.

[0165] When the pressing force in the second horizontal two-point circuit breaker 100B is adjusted, the pressing force in the third horizontal two-point circuit breaker 100C may be adjusted appropriately. Therefore, after executing step S108, the operator executes the steps after S101 again.

[0166] If the first force is less than the specified force (S107; No), the operator adjusts the pressing force in the first horizontal two-point circuit breaker 100A (S109). If the first force is less than the specified force in S107, the operator deems that the pressing force in the first horizontal two-point circuit breaker 100A, the second horizontal two-point circuit breaker 100B, and the third horizontal two-point circuit breaker 100C is inappropriate. Therefore, in S109, the operator operates Figure 22 and Figure 23 The mechanism shown is used to adjust the pressing force in the first horizontal two-point circuit breaker 100A.

[0167] When the pressing force in the first horizontal two-point circuit breaker 100A is adjusted, the pressing force in the second horizontal two-point circuit breaker 100B and the third horizontal two-point circuit breaker 100C may be adjusted appropriately. Therefore, after executing step S109, the operator executes steps S101 and thereafter again.

[0168] The above-described adjustment method for the horizontal two-point circuit breaker 100 is a method for mechanically adjusting the horizontal two-point circuit breaker 100. The adjustment method includes adjusting the force with which the movable contact 134 presses against the fixed contact 122 when the horizontal two-point circuit breaker 100 is in the closed state.

[0169] In this adjustment method, the pressing force is adjusted so that the movable contact portion 134 does not separate from the fixed contact portion 122 even when a specific force is applied so as to separate the movable contact portion 134 in the closed state from the fixed contact portion 122 .

[0170] Furthermore, the adjustment method includes the step of measuring the force for separating the movable contact portion 134 in the closed state from the fixed contact portion 122. The adjustment method adjusts the pressing force so that the measured force becomes larger than a specific force.

[0171] In this adjustment method, the spring balance G1 is used to measure the force for separating the movable contact portion 134 in the closed state from the fixed contact portion 122 .

[0172] In this adjustment method, the spring balance G1 is stretched so as to separate the movable contact portion 134 in the closed circuit state from the fixed contact portion 122 , thereby measuring the force for separating the movable contact portion 134 from the fixed contact portion 122 .

[0173] In addition, in this adjustment method, the magnitude of the specific force is determined based on the strength of the mechanism that operates the movable contact portion 134 and the strength of the stopper portion 122S.

[0174] Furthermore, the circuit structure for a three-phase, three-wire system includes a first horizontal two-point circuit breaker 100A corresponding to the first phase of the three-phase, three-wire system. The circuit structure for a three-phase, three-wire system includes a second horizontal two-point circuit breaker 100B corresponding to the second phase of the three-phase, three-wire system. The circuit structure for a three-phase, three-wire system includes a third horizontal two-point circuit breaker 100C corresponding to the third phase of the three-phase, three-wire system. The movable contacts 134 of the first horizontal two-point circuit breaker 100A, the second horizontal two-point circuit breaker 100B, and the third horizontal two-point circuit breaker 100C are actuated by power from the power unit 200. The first mechanism for actuating the movable contact 134 of the first horizontal two-point circuit breaker 100A is connected to the power unit 200 via a first link mechanism LM1. The second mechanism that actuates the movable contact 134 of the second horizontal two-point circuit breaker 100B is connected to the first mechanism via a second link mechanism LM2, which transmits power from the power unit 200. The third mechanism that actuates the movable contact 134 of the third horizontal two-point circuit breaker 100C is connected to the second mechanism via a third link mechanism LM3, which transmits power from the power unit 200. This adjustment method measures the third force, the force required to separate the movable contact 134 of the third horizontal two-point circuit breaker 100C from the fixed contact 122 in the closed state. This adjustment method terminates the adjustment when the third force exceeds a specific force.

[0175] Furthermore, this adjustment method measures the second force, which is the force used to separate the movable contact portion 134 of the second horizontal two-point circuit breaker 100B in the closed state from the fixed contact portion 122, when the third force is less than a specific force. This adjustment method adjusts the third pressing force, which is the force pressing the movable contact portion 134 of the third horizontal two-point circuit breaker 100C in the closed state against the fixed contact portion 122, when the second force is greater than the specific force.

[0176] Furthermore, this adjustment method measures the first force, which is the force required to separate the movable contact portion 134 of the first horizontal two-point circuit breaker 100A in the closed state from the fixed contact portion 122, when the second force is less than a specific force. This adjustment method adjusts the second pressing force, which is the force pressing the movable contact portion 134 of the second horizontal two-point circuit breaker 100B in the closed state against the fixed contact portion 122, when the first force is greater than the specific force. This adjustment method then measures the third force again after adjusting the second pressing force.

[0177] Furthermore, this adjustment method adjusts the first pressing force, i.e., the force by which the movable contact 134 of the first horizontal two-point circuit breaker 100A in the closed state presses against the fixed contact 122, when the first force is less than a specific force. After adjusting the first pressing force, this adjustment method measures the third force again.

[0178] According to this method, the horizontal two-point circuit breaker 100 can suppress the displacement of the movable contact portion 134, which is positioned appropriately relative to the fixed contact portion 122, even when an external force is applied to the movable contact portion 134 in the closed state. Furthermore, according to this method, even if the upper fixed contact 122U and the lower fixed contact 122L of the horizontal two-point circuit breaker 100 wear and increase frictional resistance, the movable contact portion 134 will stop in the appropriate position when transitioning to the closed state.

[0179] While the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the embodiments. It will be appreciated by those skilled in the art that various modifications or improvements can be made to the embodiments. It will be understood from the claims that embodiments incorporating such modifications or improvements are also within the technical scope of the present invention.

[0180] The order in which actions, processes, steps, and stages, etc., are performed in the apparatuses and methods described in the claims, specifications, and drawings is not specifically indicated by the phrases "before," "before," etc. Even if phrases such as "first" or "next" are used for convenience in describing the process flow in the claims, specifications, and drawings, this does not necessarily mean that the process must be performed in that order.

[0181] Description of Reference Numerals

[0182] 100 horizontal two-point circuit breaker

[0183] 100A first level two point circuit breaker

[0184] 100B Second level two-point circuit breaker

[0185] 100C third level two-point circuit breaker

[0186] 110 base

[0187] 120 fixed part

[0188] 121 Fixed insulator

[0189] 122 fixed contact part

[0190] 122L Lower fixed contact

[0191] 122S stopper

[0192] 122T terminal block

[0193] 122U upper fixed contact

[0194] 130 movable parts

[0195] 131 Rotating Insulator

[0196] 132 Rotating Plate

[0197] 132A First Arm

[0198] 132B Second Arm

[0199] 132C Third Arm

[0200] 133 leaves

[0201] 134 movable contact part

[0202] 134B base

[0203] 134C contact part

[0204] 134E electrical contact part

[0205] 134M main contacts

[0206] 134S auxiliary contact

[0207] 200 Power Department

[0208] AX spindle

[0209] C1 First component

[0210] C2 Second component

[0211] C3 Third Component

[0212] C4 Fourth component

[0213] C5 Fifth component

[0214] C6 Sixth component

[0215] C7 Seventh component

[0216] C8 Eighth Component

[0217] C9 Ninth Component

[0218] C10 Tenth component

[0219] C11 Eleventh component

[0220] C12 12th component

[0221] C13 Thirteenth component

[0222] C14 The fourteenth component

[0223] C15 The fifteenth component

[0224] C16 Sixteenth component

[0225] C17 Seventeenth component

[0226] G1 Spring Scale

[0227] J1 first connector

[0228] J2 Second connector

[0229] J3 third connector

[0230] J4 fourth connector

[0231] J5 fifth connector

[0232] J6 sixth connector

[0233] J7 seventh connector

[0234] J8 eighth connector

[0235] L1 first connecting rod

[0236] L2 Second connecting rod

[0237] L3 Third link

[0238] L4 fourth link

[0239] L5 fifth link

[0240] L6 Sixth connecting rod

[0241] L7 Seventh connecting rod

[0242] L8 Eighth connecting rod

[0243] L9 Ninth connecting rod

[0244] L10 tenth connecting rod

[0245] LM1 first link mechanism

[0246] LM2 second link mechanism

[0247] LM3 third link mechanism

[0248] S1 axis

[0249] W1 First Cable

[0250] W2 Second Cable

[0251] W3 Third Cable

[0252] W4 fourth cable.

Claims

1. A method for adjusting a horizontal two-point circuit breaker, wherein the method mechanically adjusts the horizontal two-point circuit breaker, The adjustment method includes the step of adjusting a pressing force, which is a force with which a movable contact portion presses against a fixed contact portion when the horizontal two-point circuit breaker is in a closed state.

2. The adjustment method of a horizontal two-point circuit breaker according to claim 1, wherein: The pressing force is adjusted so that the movable contact portion does not separate from the fixed contact portion even when a specific force is applied so as to separate the movable contact portion in the closed state from the fixed contact portion.

3. The adjustment method of a horizontal two-point circuit breaker according to claim 2, wherein: The adjustment method includes the step of measuring a force for separating the movable contact portion from the fixed contact portion in a closed circuit state, The pressing force is adjusted so that the measured force is greater than the specific force.

4. The adjustment method of a horizontal two-point circuit breaker according to claim 3, wherein: The force for separating the movable contact portion from the fixed contact portion in the closed state is measured using a spring balance.

5. The adjustment method of a horizontal two-point circuit breaker according to claim 4, wherein: The spring balance is stretched so as to separate the movable contact portion in the closed state from the fixed contact portion, and the force for separating the movable contact portion from the fixed contact portion is measured.

6. The adjustment method of a horizontal two-point circuit breaker according to claim 2, wherein: The magnitude of the specific force is determined by the strength of a mechanism that operates the movable contact portion and the strength of a stopper portion of the fixed contact portion against which the movable contact portion presses.

7. The adjustment method of a horizontal two-point circuit breaker according to claim 3, wherein: The structure of the circuit used for three-phase three-wire system has: a first horizontal two-point circuit breaker corresponding to the first of the three-phase three-wire system; a second horizontal two-point circuit breaker corresponding to the second of the three-phase three-wire system; and The third level two-point circuit breaker corresponding to the third of the three-phase three-wire system, The first movable contact of the first horizontal two-point circuit breaker, the second movable contact of the second horizontal two-point circuit breaker, and the third movable contact of the third horizontal two-point circuit breaker are actuated by receiving power from a power unit. The first mechanism for moving the first movable contact portion is connected to the power portion via a first link mechanism that transmits power of the power portion. The second mechanism for moving the second movable contact portion is connected to the first mechanism via a second link mechanism that transmits power from the power portion. The third mechanism for moving the third movable contact portion is connected to the second mechanism via a third link mechanism for transmitting power from the power portion. measuring a third force for separating the third movable contact portion from the third fixed contact portion of the third horizontal two-point circuit breaker in a closed state; When the third force is greater than the specific force, the adjustment is ended.

8. The adjustment method of a horizontal two-point circuit breaker according to claim 7, wherein: When the third force is smaller than the specific force, a second force is measured, wherein the second force is a force for separating the second movable contact portion from the second fixed contact portion of the second horizontal two-point circuit breaker in a closed state. When the second force is greater than the specific force, a third pressing force is adjusted, wherein the third pressing force is a force by which the third movable contact portion presses against the third fixed contact portion in the closed state.

9. The adjustment method of a horizontal two-point circuit breaker according to claim 8, wherein: When the second force is smaller than the specific force, a first force is measured, wherein the first force is a force for separating the first movable contact portion from the first fixed contact portion of the first horizontal two-point circuit breaker in a closed state. When the first force is greater than the specific force, a second pressing force is adjusted, wherein the second pressing force is a force that presses the second movable contact portion onto the second fixed contact portion in a closed state. After the second pressing force is adjusted, the third force is measured again.

10. The adjustment method of a horizontal two-point circuit breaker according to claim 9, wherein: When the first force is smaller than the specific force, a first pressing force is adjusted, wherein the first pressing force is a force by which the first movable contact portion presses against the first fixed contact portion in a closed state. After adjusting the first pressing force, the third force is measured again.

11. A horizontal two-point circuit breaker for opening and closing a charged circuit, wherein: The horizontal two-point circuit breaker has: a fixed portion having a fixed contact portion; a movable portion having a movable contact portion; and An adjustment mechanism is used to adjust a pressing force, which is a force with which the movable contact portion presses against the fixed contact portion when the horizontal two-point circuit breaker is in a closed state.

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