Sleeve structure for pole-mounted circuit breaker and pole-mounted circuit breaker

Abstract

The utility model discloses a bushing structure for a pole-mounted circuit breaker and the pole-mounted circuit breaker thereof, and relates to the technical field of pole-mounted circuit breakers, the pole-mounted circuit breaker comprises a shell, two ends of the outer part of the shell are respectively provided with a wire inlet bushing and a wire outlet bushing which are matched with the shell, one side of the interior of the shell is provided with an inlet wire conductive assembly matched with the inlet wire sleeve, the other side of the interior of the shell is provided with an outlet wire conductive assembly matched with the outlet wire sleeve, the bottom of the outlet wire conductive assembly is provided with a vacuum arc-extinguishing chamber, and one side, far away from the outlet wire conductive assembly, of the vacuum arc-extinguishing chamber is provided with a flexible connector; the inner top of the housing is provided with an isolation knife switching-on and switching-off assembly which is matched with the outgoing line conductive assembly. According to the pole-mounted circuit breaker, a wire inlet end conductor between the isolation static end contact and the wire inlet sleeve can be saved, so that the consumption of primary loop copper materials is reduced, meanwhile, the reduction of the primary loop enables the circuit breaker switch body to be smaller and lighter, and the overall material cost of the pole-mounted circuit breaker is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of pole-mounted circuit breakers, in particular to a bushing structure for a pole-mounted circuit breaker and the pole-mounted circuit breaker. Background Art

[0002] In the field of 10kV power distribution, outdoor pole-mounted vacuum circuit breakers usually consist of two parts: a circuit breaker switch and an isolating switch. After the isolating switch is opened, a reliable insulation gap is established to separate the equipment or line that needs to be repaired from the power supply with an obvious disconnection point to ensure the safety of maintenance personnel and equipment. It plays a vital role in the power system.

[0003] Since the pole-mounted circuit breaker needs to be installed on the pole, for the convenience of installation and reliability after installation, there are usually certain requirements for its size and weight. However, most of the existing outdoor pole-mounted circuit breakers on the market, such as ZW20, LW3, ZW32 and other models, are only equipped with circuit breaker switches to reduce size and weight, which poses certain safety hazards to maintenance personnel and equipment operation. Therefore, how to make the circuit breaker have an isolating switch while minimizing the size and weight of the circuit breaker is of great market value.

[0004] There are many types of outdoor pole-mounted circuit breakers on the market, such as Fig.13 As shown (in Fig.13 In the figure, E is the wiring copper conductor; F is the insulating package; G is the silicone rubber soft package; H is the sealing ring groove), but the primary circuit is mostly the connection structure described above, the inlet and outlet bushings are connected to the arc extinguishing chamber or the disconnector contact through the inlet and outlet conductors. The conductors at the inlet and outlet ends are usually copper, which accounts for a large proportion of the material cost of the switch. At the same time, the increase in the conductive circuit also increases the overall volume of the switch and the loop resistance of the primary circuit, which makes the temperature rise of the equipment higher during operation, reducing the competitive advantage of the product in the market; on the other hand, the connection between the inlet and outlet conductors and the inlet and outlet bushings is mostly a strap contact or a spring contact. It is usually necessary to install it in a straight line during the installation process, and there are certain requirements for the installation process. For example, if the two sides are not concentric, the contact area on one side will be too large. Long-term operation under this working condition will cause the temperature rise on the side with high pressure to be too high, affecting its service life.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a bushing structure for a pole-mounted circuit breaker and a pole-mounted circuit breaker thereof, which has the advantage of reducing product costs, thereby solving the problem of being unable to reduce product costs.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned advantage of reducing product cost, the specific technical solutions adopted by the utility model are as follows:

[0010] According to one aspect of the utility model, a bushing structure for a pole-mounted circuit breaker is provided, comprising an incoming bushing and an outgoing bushing, the incoming bushing and the outgoing bushing are respectively mounted at two ends of the outside of a shell of the pole-mounted circuit breaker, and the incoming bushing has the same structure as the outgoing bushing, the incoming bushing comprises an incoming tube body arranged on one side of the outside of the shell, a plurality of silicone rubber soft bags are evenly arranged on one side of the outside of the incoming tube body, a wiring copper conductor is arranged inside the incoming tube body, and an insulating package is arranged between the wiring copper conductor and the incoming tube body, an inner insulating soft package is arranged on the other side of the outside of the incoming tube body, and a sealing ring groove is arranged between the inner insulating soft package and the silicone rubber soft package, a replaceable contact finger sleeve is arranged on one side of the inside of the incoming tube body and away from the wiring copper conductor, an insulating guide column is arranged on one side of the replaceable contact finger sleeve, and a plurality of isolation spring contact fingers are symmetrically arranged at both ends of the insulating guide column.

[0011] It should be noted that the incoming bushing and the outgoing bushing can play the role of wiring terminals in the circuit breaker switch, and the incoming bushing and the outgoing bushing are both provided with static contact mounting seats, which can adapt to the use conditions of the incoming and outgoing lines, and the insulating wrap is usually epoxy resin wrapped, which plays an insulating and supporting role; the silicone rubber soft bag is usually silicone rubber wrapped, and multiple circles of umbrella skirts are provided on the silicone rubber soft bag, which increases the creepage distance from the exposed part of the wiring copper conductor to the switch shell, so that the bushing can adapt to the harsh outdoor use environment; the sealing ring groove is usually used to install the sealing ring to prevent external moisture, impurities, etc. from entering the circuit breaker and affecting the insulation.

[0012] According to another aspect of the utility model, a pole-mounted circuit breaker is also provided, which includes a shell, and the two ends of the shell are respectively provided with an incoming line bushing and an outgoing line bushing that match therewith, an incoming line conductive component that matches the incoming line bushing is provided on one side of the interior of the shell, and an outgoing line conductive component that matches the outgoing line bushing is provided on the other side of the interior of the shell, a vacuum arc extinguishing chamber is provided at the bottom of the outgoing line conductive component, and a soft connection is provided on the side of the vacuum arc extinguishing chamber away from the outgoing line conductive component; an isolating knife separation and combination component that matches the outgoing line conductive component is provided on the inner top of the shell.

[0013] Furthermore, in order to respectively arrange the isolating static end contacts inside the incoming bushing and the outgoing bushing, the incoming end conductor between the isolating static end contacts and the incoming bushing can be saved, so that each time the primary circuit is optimized, the size of the primary circuit can be reduced, thereby not only saving the material cost of the primary conductive circuit, but also the reduction in the size of the primary circuit makes the box body smaller in size and lighter in weight, which is more suitable for the characteristics of the pole-mounted circuit breaker being installed on the pole, thereby improving the market competitiveness of the product. The incoming conductive component includes a first connecting contact finger arranged on one side of the shell and connected to the incoming bushing, the side of the first connecting contact finger away from the incoming bushing is provided with an incoming end conductor, and the side of the incoming end conductor away from the first connecting contact finger is provided with a first isolating static end contact, and the outgoing conductive component includes a second connecting contact finger arranged on the other side of the shell and connected to the outgoing bushing, and the side of the second connecting contact finger away from the outgoing bushing is provided with an outgoing end conductor.

[0014] Furthermore, in order to drive the isolation knife to realize linear movement of the isolation knife by rotating the isolation knife crank arm and realize the separation and closing operation of the isolation knife, the isolation knife separation and closing assembly includes an isolation knife crank arm arranged at the top of the shell, and the isolation knife crank arm is connected to the isolation knife through the isolation knife connecting pin; one end of the isolation knife is connected to the incoming line conductive assembly, and an isolation contact finger is arranged at the end of the isolation knife away from the incoming line conductive assembly, and a second isolation static end contact is arranged on one side of the isolation contact finger, and a long slot hole is opened at the outer bottom of the isolation knife crank arm, and an isolation knife connecting pin is arranged inside the long slot hole.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a bushing structure for a pole-mounted circuit breaker and a pole-mounted circuit breaker thereof, which has the following beneficial effects:

[0017] (1) The utility model arranges the isolating static end contacts inside the incoming line bushing and the outgoing line bushing respectively, which can save the incoming line conductor between the isolating static end contacts and the incoming line bushing, thereby reducing the consumption of primary circuit copper. At the same time, the reduction of the primary circuit can make the circuit breaker switch body smaller and lighter, making the overall material cost of the pole-mounted circuit breaker lower, thereby improving the market competitiveness of the product.

[0018] (2) The utility model eliminates the incoming conductor in the primary circuit, thereby reducing the copper material used in the primary circuit by about 110 mm, accounting for about 8% of the entire conductive circuit. At the same time, the first connecting contact finger connecting the incoming conductor and the incoming bushing is also removed. Removing the first connecting contact finger can not only reduce product cost, but also reduce the circuit resistance of the product, thereby reducing the overall circuit resistance of the circuit breaker switch by about 14%. Since the incoming conductor is removed from the primary circuit, the internal switch of the pole-mounted circuit breaker can be made smaller and lighter, which is more suitable for the characteristics of the pole-mounted circuit breaker being installed on a pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a pole-mounted circuit breaker according to an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the isolating knife in the pole-mounted circuit breaker according to an embodiment of the utility model when it is in the open position;

[0022] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0023] Figure 4 It is a structural schematic diagram of the isolating knife in the pole-mounted circuit breaker according to an embodiment of the utility model when it is in the closed position;

[0024] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0025] Figure 6 is a structural schematic diagram of a pole-mounted circuit breaker according to another angle of an embodiment of the utility model;

[0026] Figure 7 yes Figure 6 A partial enlarged view of point C in the middle;

[0027] Figure 8 It is a structural schematic diagram of an isolating knife separation and combination assembly in a pole-mounted circuit breaker according to an embodiment of the utility model;

[0028] Fig. 9 It is a structural schematic diagram of a bushing structure for a pole-mounted circuit breaker according to an embodiment of the utility model;

[0029] Fig.10 It is a partial cross-sectional view of the bushing structure for a pole mounted circuit breaker according to an embodiment of the utility model;

[0030] Fig.11 is a partial cross-sectional view of another angle of the bushing structure for a pole-mounted circuit breaker according to an embodiment of the utility model;

[0031] Fig.12 yes Fig.11 A partial enlarged view of point D in the middle;

[0032] Fig.13 It is a structural schematic diagram of a commonly used bushing structure in the bushing structure for a pole-mounted circuit breaker according to an embodiment of the utility model.

[0033] In the figure:

[0034] 1. Shell; 2. Inlet bushing; 201. Inlet tube body; 202. Silicone rubber soft package; 203. Wiring copper conductor; 204. Insulation package; 205. Inner insulation soft package; 206. Sealing ring notch; 207. Interchangeable contact finger sleeve; 208. Insulation guide pillar; 209. Isolation spring contact finger; 3. Outlet bushing; 4. Inlet conductive assembly; 401. First connection contact finger; 402. Inlet end conductor; 403. First isolation static end contact; 5. Outlet conductive assembly; 501. Second connection contact finger; 502. Outlet end conductor; 6. Vacuum interrupter; 7. Soft connection; 8. Isolation knife separation and combination assembly; 801. Isolation knife crank arm; 8011. Long slot hole; 802. Isolation knife connecting pin; 803. Isolation knife; 804. Isolation contact finger; 805. Second isolation static end contact. DETAILED DESCRIPTION

[0035] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0036] According to an embodiment of the utility model, a bushing structure for a pole-mounted circuit breaker and a pole-mounted circuit breaker are provided.

[0037] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 9-13As shown, according to the embodiment of the utility model, the bushing structure for the pole-mounted circuit breaker includes an incoming bushing 2 and an outgoing bushing 3, which are respectively installed at the two ends of the outside of the housing 1 of the pole-mounted circuit breaker, and the structures of the incoming bushing 2 and the outgoing bushing 3 are the same. The incoming bushing 2 includes an incoming tube body 201 arranged on one side of the outside of the housing 1, and a plurality of silicone rubber soft bags 202 are evenly arranged on one side of the outside of the incoming tube body 201. A wiring copper conductor 203 is arranged inside the incoming tube body 201, and the wiring copper conductor 203 and the incoming tube body 201 are connected to each other. An insulating package 204 is arranged between the two ends of the insulating guide column 208, an inner insulating soft package 205 is arranged on the other side of the outside of the incoming line tube body 201, and a sealing ring groove 206 is arranged between the inner insulating soft package 205 and the silicone rubber soft package 202, and a replaceable contact finger sleeve 207 is arranged on the inside of the incoming line tube body 201 and on the side away from the wiring copper conductor, and an insulating guide column 208 is arranged on one side of the replaceable contact finger sleeve 207, and a plurality of isolation spring contact fingers 209 are symmetrically arranged at both ends of the insulating guide column 208, so that it can play the role of a wiring terminal in the circuit breaker switch through the incoming line bushing 2 and the outgoing line bushing 3.

[0038] In addition, it should be noted that both the incoming bushing 2 and the outgoing bushing 3 are provided with a static contact mounting seat, which can adapt to the use conditions of the incoming and outgoing lines, and the insulating package 204 is usually epoxy resin wrapped, which plays an insulating and supporting role; the silicone rubber soft package 202 is usually silicone rubber wrapped, and a plurality of umbrella skirts are provided on the silicone rubber soft package 202, which increases the creepage distance from the exposed part of the wiring copper conductor 203 to the switch outer shell 1, so that the bushing can adapt to the harsh outdoor use environment; the sealing ring notch 206 is usually used to install the sealing ring to prevent external moisture, impurities, etc. from entering the circuit breaker and affecting the insulation; a guide device is provided inside the contact finger to ensure that the isolating knife and the contact finger are concentric when the switch is closed.

[0039] like Figure 1-Figure 8 As shown, according to another embodiment of the utility model, a pole-mounted circuit breaker is further provided, which comprises a shell 1, wherein two ends of the exterior of the shell 1 are respectively provided with an incoming line bushing 2 and an outgoing line bushing 3 which match therewith, an incoming line conductive component 4 which matches the incoming line bushing 2 is provided on one side of the interior of the shell 1, an outgoing line conductive component 5 which matches the outgoing line bushing 3 is provided on the other side of the interior of the shell 1, a vacuum arc extinguishing chamber 6 is provided at the bottom of the outgoing line conductive component 5, and a soft connection 7 is provided on the side of the vacuum arc extinguishing chamber 6 which is away from the outgoing line conductive component 5; an isolating knife separation and combination component 8 which matches the outgoing line conductive component 5 is provided on the inner top of the shell 1.

[0040] In one embodiment, for the above-mentioned incoming line conductive component 4, the incoming line conductive component 4 includes a first connecting contact 401 arranged on one side of the housing 1 and connected to the incoming line bushing 2 (the loop resistance of one connecting contact is about 7 μΩ), an incoming line end conductor 402 is arranged on the side of the first connecting contact 401 away from the incoming line bushing 2, and a first isolating static end contact 403 is arranged on the side of the incoming line end conductor 402 away from the first connecting contact 401; the outgoing line conductive component 5 includes a second connecting contact 501 arranged on the other side of the housing 1 and connected to the outgoing line bushing 3, An outlet terminal conductor 502 is arranged on the side of the second connecting contact finger 501 away from the outlet bushing 3, so that the isolating static end contact is respectively arranged inside the incoming bushing 2 and the outgoing bushing 3, which can save the incoming terminal conductor 402 between the isolating static end contact and the incoming bushing 2, so that each optimization of the primary circuit can reduce the size of the primary circuit, thereby not only saving the material cost of the primary conductive circuit, but also reducing the size of the primary circuit so that the box body can be smaller in size and lighter in weight, which is more suitable for the characteristics of the pole-mounted circuit breaker being installed on the pole, thereby improving the market competitiveness of the product.

[0041] In one embodiment, for the above-mentioned isolation knife separation and combination component 8, the isolation knife separation and combination component 8 includes an isolation knife crook arm 801 arranged at the top of the shell body 1, and the isolation knife crook arm 801 is connected to the isolation knife 803 through the isolation knife connecting pin 802; one end of the isolation knife 803 is connected to the incoming line conductive component 4, and the end of the isolation knife 803 away from the incoming line conductive component 4 is provided with an isolation contact finger 804, and a second isolation static end contact 805 is provided on one side of the isolation contact finger 804, and a long slot hole 8011 is provided at the outer bottom of the isolation knife crook arm 801, and an isolation knife connecting pin 802 is provided inside the long slot hole 8011, so that the isolation knife 803 is driven by the rotation of the isolation knife crook arm 801 to realize the linear movement of the isolation knife 803, thereby realizing the separation and combination operation of the isolation knife 803.

[0042] It should be noted that a first isolating static end contact 403 is installed on the incoming line end conductor 402. When the isolating knife crank arm 801 drives the isolating knife 803 to insert into the first isolating static end contact 403, the primary circuit is turned on. When the isolating knife crank arm 801 drives the isolating knife 803 to the first isolating static end contact 403, the primary circuit is disconnected. The first isolating static end contact 403 and the isolating knife 803 form an effective fracture to ensure the safety and reliability of the equipment.

[0043] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0044] In actual application, the first isolating static end contact 403 is firstly arranged in the incoming line bushing 2, and the isolating spring contact finger 209 is installed on the replaceable contact finger sleeve 207, so as to realize the function of the first isolating static end contact 403. Since the replaceable contact finger sleeve 207 is connected to the wiring copper conductor 203 by a thread and is replaceable, it can be replaced with the replaceable contact finger sleeve 207 when used as the outgoing line bushing 3, thereby ensuring that the bushing can adapt to the installation on the incoming and outgoing line sides at the same time.

[0045] An insulating guide column 208 is provided on the replaceable contact finger sleeve 207. When the isolating knife 803 is inserted into the replaceable contact finger sleeve 207, the insulating guide column 208 can play a guiding role, so that the isolating knife 803 is aligned with the center of the replaceable contact finger sleeve 207, thereby avoiding poor contact on one side when the isolation spring contact finger 209 contacts the isolating knife 803 due to improper installation. At the same time, an inner insulating soft package 205 is provided at the end where the incoming bushing 2 and the outgoing bushing 3 contact the switch. During installation, the inner insulating soft package 205 is tightly fitted to the switch to prevent the isolating knife 803 from discharging to other metal bodies inside the switch in the closed position.

[0046] It should be noted that in the entire primary conductive circuit of the 12kV pole-mounted circuit breaker, the vacuum interrupter 6 is basically a standard product in the shape of a circular tube. Therefore, how to optimize the structure of the primary circuit of the isolating knife part plays a very important role in the structural design of the pole-mounted circuit breaker. Only by reducing the size of the primary conductive circuit of the isolating knife part can the overall size and weight of the circuit breaker switch be reduced.

[0047] In summary, with the aid of the above technical solution of the utility model, the utility model arranges the isolating static end contact inside the incoming bushing 2 and the outgoing bushing 3 respectively, which can save the incoming conductor 402 between the isolating static end contact and the incoming bushing 2, thereby reducing the consumption of copper material in the primary circuit. At the same time, the reduction of the primary circuit can make the circuit breaker switch body smaller and lighter, so that the overall material cost of the pole-mounted circuit breaker is lower, and the market competitiveness of the product is improved; the utility model reduces the copper material of the primary circuit by about 110mm by eliminating the incoming conductor 402 in the primary circuit, accounting for about 8% of the overall conductive circuit, and also removes the first connecting contact finger connecting the incoming conductor 402 with the incoming bushing 2. Removing the first connecting contact finger can not only reduce the product cost, but also reduce the circuit resistance of the product, so that the overall circuit resistance of the circuit breaker switch is reduced by about 14%. Since the incoming conductor 402 is removed from the primary circuit, the internal switch of the pole-mounted circuit breaker can be made smaller and lighter, which is more suitable for the characteristics of the pole-mounted circuit breaker being installed on the pole.

[0048] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bushing structure for a pole-mounted circuit breaker, comprising an incoming bushing (2) and an outgoing bushing (3), wherein the incoming bushing (2) and the outgoing bushing (3) are respectively mounted at two ends of the exterior of a housing (1) of the pole-mounted circuit breaker, and the incoming bushing (2) and the outgoing bushing (3) have the same structure, characterized in that: The inlet bushing (2) comprises an inlet tube body (201) arranged on one side of the exterior of the housing (1); a plurality of silicone rubber soft bags (202) are evenly arranged on one side of the exterior of the inlet tube body (201); a wiring copper conductor (203) is arranged inside the inlet tube body (201); an insulating bag (204) is arranged between the wiring copper conductor (203) and the inlet tube body (201); an inner insulating soft bag (205) is arranged on the other side of the exterior of the inlet tube body (201); and a sealing ring notch (206) is arranged between the inner insulating soft bag (205) and the silicone rubber soft bag (202).

2. The bushing structure for a pole mounted circuit breaker according to claim 1, characterized in that: A replaceable contact finger sleeve (207) is arranged inside the inlet pipe body (201) and on a side away from the wiring copper conductor, an insulating guide column (208) is arranged on one side of the replaceable contact finger sleeve (207), and a plurality of isolation spring contact fingers (209) are symmetrically arranged at both ends of the insulating guide column (208).

3. A pole mounted circuit breaker, which realizes operation on the connection terminals of the pole mounted circuit breaker based on the bushing structure for the pole mounted circuit breaker according to any one of claims 1 to 2, characterized in that: The pole-mounted circuit breaker comprises a housing (1), two ends of the housing (1) are respectively provided with an incoming line bushing (2) and an outgoing line bushing (3) which match the incoming line bushing (2), one side of the interior of the housing (1) is provided with an incoming line conductive component (4) which matches the incoming line bushing (2), the other side of the interior of the housing (1) is provided with an outgoing line conductive component (5) which matches the outgoing line bushing (3), a vacuum arc extinguishing chamber (6) is provided at the bottom of the outgoing line conductive component (5), and a flexible connection (7) is provided on the side of the vacuum arc extinguishing chamber (6) away from the outgoing line conductive component (5); An isolating knife separation and connection assembly (8) matching with the outlet conductive assembly (5) is arranged on the inner top of the housing (1).

4. A pole mounted circuit breaker according to claim 3, characterized in that: The incoming line conductive component (4) comprises a first connecting contact (401) arranged at one side inside the housing (1) and connected to the incoming line bushing (2); an incoming line end conductor (402) is arranged at a side of the first connecting contact (401) away from the incoming line bushing (2); and a first isolating static end contact (403) is arranged at a side of the incoming line end conductor (402) away from the first connecting contact (401).

5. A pole mounted circuit breaker according to claim 4, characterized in that: The outlet conductive component (5) comprises a second connecting contact finger (501) arranged at the other side of the housing (1) and connected to the outlet bushing (3); an outlet terminal conductor (502) is arranged on the side of the second connecting contact finger (501) away from the outlet bushing (3).

6. A pole mounted circuit breaker according to claim 5, characterized in that: The isolation knife separation and combination assembly (8) comprises an isolation knife turning arm (801) arranged at the top of the housing (1), and the isolation knife turning arm (801) is connected to the isolation knife (803) via the isolation knife connecting pin (802); One end of the isolation knife (803) is connected to the incoming line conductive component (4), and an isolation contact finger (804) is provided at one end of the isolation knife (803) away from the incoming line conductive component (4), and a second isolation static end contact (805) is provided on one side of the isolation contact finger (804).

7. A pole mounted circuit breaker according to claim 6, characterized in that: The outer bottom of the isolation knife crutch arm (801) is provided with a long slot hole (8011), and the isolation knife connecting pin (802) is arranged inside the long slot hole (8011).

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