Novel circuit breaker

Abstract

Disclosed is a novel circuit breaker, comprising: a housing (10); a lead-in terminal (11), a lead-out terminal (12), a trip device (14), a thermal trip mechanism (15), a magnetic trip mechanism (16), an arc extinguishing chamber (17), and a handle assembly (13) which are fixed in the housing (10); an integrated lead-in end lug (18), comprising a lead-in bottom sheet part (181) and a lead-in connecting part (182), wherein the lead-in bottom sheet part (181) is arranged at the bottom of the lead-in terminal (11) and is used for being directly connected to an externally connected power line; and an integrated lead-out end lug (19), wherein at least one coil part (192) is provided thereon, and the coil part (192) is arranged outside the magnetic trip mechanism (16) and is used for triggering, when a strong current passes, the magnetic trip mechanism (16) to perform a tripping action. The lead-in and lead-out lugs and an arc guide plate (20) are integrally designed, so that welding spots are reduced and reliable transmission is ensured, and arc extinguishing can be effectively achieved; and the trip mechanisms on the two sides can be used in combination with an external module, so that the circuit breaker can be suitable for more complex application scenarios.

Description

A new type of circuit breaker Technical Field

[0001] The present invention relates to the technical field of circuit breakers, and in particular to a novel circuit breaker. Background Art

[0002] Circuit breakers are common circuit protection components. When a short circuit, overload, or other condition occurs, they disconnect the circuit, thereby providing protection. Their importance in circuits is self-evident, but this also places higher demands on them. Ensuring stable current transmission within the circuit breaker, ensuring tripping in the event of a short circuit, and eliminating arcing during the tripping process are key criteria for evaluating circuit breaker quality. Existing circuit breakers typically use welding to connect components. The reliability of the welds affects the reliability of the circuit breaker, often leading to poor contact. Therefore, this type of circuit breaker is only suitable for low-current scenarios. Furthermore, the arc generated during the circuit breaker tripping process lacks directional guidance, allowing some arc to escape from the arc extinguishing chamber and escape into the circuit breaker. This not only damages the internal structure of the circuit breaker but also poses a fire hazard. In particular, due to the limited internal space of the circuit breaker, the tripping mechanism of existing circuit breakers is typically single-sided, creating a force couple during tripping. This can lead to inadequate tripping and damage to the tripping mechanism. Technical issues

[0003] How to provide a circuit breaker that can reliably transmit current and stably trip a protective circuit is a technical problem that people in this field urgently need to solve. Technical Solutions

[0004] In response to the above problems, the present invention provides a new circuit breaker, which adopts an integrated design for both the inlet and outlet wires to reduce welding points and ensure reliable current transmission. In addition, the arc guide plate design guides the entire tripping arc into the arc extinguishing chamber to prevent arc overflow. Moreover, the double-sided tripping mechanism eliminates the influence of the force couple during tripping, ensuring the stability of the tripping. In particular, the double-sided tripping mechanism can also be used in combination with an external module to expand the tripping situations of the circuit breaker, making the circuit breaker suitable for more complex application scenarios.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] A novel circuit breaker includes a housing, and an incoming terminal, an outgoing terminal, a trip unit, a thermal trip mechanism, a magnetic trip mechanism, an arc extinguishing chamber, and a handle assembly fixed therein. The trip unit includes a trip link assembly and a moving contact assembly, wherein the moving contact assembly is provided with a moving contact. The thermal trip mechanism includes a bimetallic strip and a thermal trip hook connected to one end of the bimetallic strip. The magnetic trip mechanism includes a moving iron core, a static iron core, a magnetic spring, and a striker. The circuit breaker is characterized in that it includes:

[0007] An integrated incoming terminal lug is used to directly introduce an external power supply into the circuit breaker, comprising an incoming line bottom plate portion and an incoming line connection portion. The incoming line bottom plate portion is provided at the bottom of the incoming line terminal and is used to directly connect to the external power supply line. The incoming line connection portion is welded to the other end of the bimetallic strip, and the thickness of the incoming line connection portion is smaller than that of the incoming line bottom plate portion.

[0008] The integrated output terminal lug is used to output the power in the circuit breaker directly to the external load. It is provided with at least one coil portion, which is arranged outside the magnetic tripping mechanism and is used to trigger the magnetic tripping mechanism to perform a tripping action when a strong current passes through.

[0009] Furthermore, the integrated outlet terminal lug is also provided with a conducting portion, an outlet bottom plate portion, and a guide portion, the conducting portion is provided with a static contact, the outlet bottom plate portion is arranged at the bottom of the outlet terminal, and the guide portion is arranged at the end adjacent to the conducting portion close to the arc extinguishing chamber, for guiding the arc into the arc extinguishing chamber.

[0010] Furthermore, the novel circuit breaker also includes an integrated arc guide plate for guiding all arcs generated in the circuit breaker into the arc extinguishing chamber to prevent circuit hazards caused by arc overflow. The integrated arc guide plate includes an arc guide access portion, an arc guide connection portion, an arc guide portion, an arc guide side stop portion, and an arc guide bottom plate portion. The arc guide access portion is welded to the other end of the bimetallic strip, the arc guide connection portion extends in the same direction and parallel to the bimetallic strip for a height, the arc guide bottom plate portion is placed at the bottom of the arc extinguishing chamber, the arc guide portion is arranged between the arc guide connection portion and the arc guide bottom plate portion, the arc guide portion forms a slope angle inclined toward the arc extinguishing chamber, the projection of the static contact on the arc guide portion is close to or in the middle position of the arc guide portion, and there are two arc guide side stops, which are respectively arranged on both sides of the arc guide portion.

[0011] Furthermore, the novel circuit breaker further includes an arc baffle, which is composed of two pieces. Each arc baffle is respectively arranged on the outer side of the corresponding arc-guiding side baffle, and the arc baffle is made of gas-generating nylon.

[0012] Furthermore, the novel circuit breaker also includes an adjustment portion, which is used to adjust the position of the bimetallic strip and the incoming line connection portion, or adjust the position of the bimetallic strip, the incoming line connection portion and the arc guide access portion in the circuit breaker. The adjustment portion includes a connecting plate and a set screw. The connecting plate is provided with a snap-in groove, a strip-shaped through groove connected to the snap-in groove, and a threaded portion provided on the strip-shaped through groove. The snap-in groove is used to snap into the bimetallic strip and the incoming line connection portion, or snap into the bimetallic strip, the incoming line connection portion and the arc guide access portion. The set screw is defined on the housing, passes through the strip-shaped through groove and is connected to the threaded portion, and the position of each component of the snap-in groove in the circuit breaker is adjusted by adjusting the set screw.

[0013] Furthermore, the tripping connecting rod includes a magnetic tripping component, a thermal tripping component, and a connecting rod shaft. The magnetic tripping component and the thermal tripping component are connected by interference fit. The magnetic tripping component is provided with a magnetic tripping cross bar, an axial hole A, and a side tripping portion A. The magnetic tripping cross bar trips the circuit breaker when hit by the striker. The thermal tripping component is provided with a matching portion, a thermal tripping portion, an axial hole B, a side tripping portion B, and a manual tripping portion. The matching portion and the magnetic tripping cross bar are interference fit. The thermal tripping portion is provided on the outside of the matching position between the thermal tripping component and the magnetic tripping component. The thermal release part trips the circuit breaker when it is subjected to the pulling force of the thermal release hook. The axial hole B and the axial hole A are of the same size, and the vertical center lines of the axial hole B and the axial hole A are in the same straight line. The manual release part is connected to the handle assembly, and the handle assembly can drive the manual release part to trip the circuit breaker. The connecting rod shaft passes through the axial hole A, the moving contact assembly, and the axial hole B in sequence. The side release part A and the side release part B are interference fit, and the vertical center lines of the side release part A and the side release part B are in the same straight line, which is used for the tripping connection when the circuit breaker cooperates with the external unit.

[0014] Furthermore, trip slots are provided on both sides of the housing, and the trip slots are used to allow an external unit to pass through the circuit breaker housing and connect to the side trip portion A and / or side trip portion B, so as to trip the circuit breaker according to the requirements of the external unit.

[0015] Furthermore, the novel circuit breaker further includes a current transformer, and the integrated incoming terminal lug further includes a bent portion, which passes through the current transformer, and the current transformer outputs the current passing through the bent portion at a reciprocal multiple of the number of coils of the current transformer. Beneficial effects

[0016] The beneficial effects of the present invention are as follows: (1) the inlet piece in the circuit breaker adopts an integrated design, and the external power line can be directly introduced into the circuit breaker through the inlet piece. The integrated design is more stable and reliable than the welding point connection; (2) the outlet piece in the circuit breaker adopts an integrated design, and the coil part is also integrated on the outlet piece, so that the current passing through the coil part is more stable and the magnetic tripping is more accurate; (3) the circuit breaker adopts an integrated arc guide plate, and two arc baffles made of gas-generating nylon are attached, so that the arc generated during tripping can be introduced into the arc extinguishing chamber, avoiding the safety hazards caused by arc overflow; (4) the tripping connecting rod in the circuit breaker is composed of a magnetic tripping component and a thermal tripping component. The tripping parts are connected by interference fit and fixed to the housing through the connecting rod shaft, so that the tripping connecting rod is more stable when rotating to trip, avoiding the unstable tripping caused by the generation of a force couple. In addition, a side tripping part is provided on the tripping connecting rod, and the external unit can be connected to the circuit breaker through the side tripping part, so that the circuit breaker can trip under the command of the external unit, expanding the tripping application scenario of the circuit breaker; (5) A current transformer can be set at the bent part of the integrated incoming terminal lug in the circuit breaker. After the circuit data passing through the incoming terminal is converted and output by the current transformer, the circuit data in the circuit breaker can be monitored through the back-end platform, making it an intelligent circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of the external structure of a novel circuit breaker of the present invention;

[0018] FIG2 is a schematic diagram of the internal structure of a novel circuit breaker of the present invention;

[0019] FIG3 is a schematic structural diagram of an integrated incoming terminal lug of a novel circuit breaker according to the present invention;

[0020] FIG4 is a schematic structural diagram of an integrated outlet terminal lug of a novel circuit breaker according to the present invention;

[0021] FIG5 is a schematic structural diagram of an integrated arc guide plate of a novel circuit breaker according to the present invention;

[0022] FIG6 is a schematic structural diagram of a trip link assembly of a novel circuit breaker according to the present invention;

[0023] Description of reference numerals: 10-housing, 101-tripping slot, 11-incoming terminal, 12-outgoing terminal, 13-handle assembly, 14-tripping device, 141-tripping connecting rod assembly, 1411-magnetic release component, 14111-magnetic release cross bar, 14112-axial hole A, 14113-side release portion A, 1412-connecting rod shaft, 1413-thermal release component, 14131-matching portion, 14132-thermal release portion, 14133-axial hole B, 14134-side release portion B, 14135-manual tripping portion, 142-moving contact assembly, 1421-moving contact, 15-thermal release mechanism, 151-bimetallic strip, 152-thermal release hook, 16-magnetic release mechanism, 16 1-striker, 17-arc extinguishing chamber, 18-integrated incoming terminal lug, 181-incoming line bottom plate, 182-incoming line connection part, 183-bending part, 19-integrated outgoing line part, 191-conducting part, 1911-static contact, 192-coil part, 193-outgoing line bottom plate, 194-guide part, 20-integrated arc guide plate, 201-arc guide access part, 202-arc guide connection part, 203-arc guide part, 204-arc guide side stop, 205-arc guide bottom plate part, 21-arc stop plate, 22-adjustment part, 221-connecting plate, 2211-slot, 2212-strip through groove, 2213-threaded part, 222-set screw, 23-current transformer. Best Mode for Carrying Out the Invention

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] As shown in Figure 1-2.

[0026] A novel circuit breaker includes a housing 10, and an incoming terminal 11, an outgoing terminal 12, a handle assembly 13, a trip unit 14, a thermal trip mechanism 15, a magnetic trip mechanism 16, and an arc extinguishing chamber 17 fixed therein. The trip unit 14 includes a trip link assembly 141 and a moving contact assembly 142, wherein the moving contact assembly 142 is provided with a moving contact 1421. The thermal trip mechanism 15 includes a bimetallic strip 151 and a thermal trip hook 152, wherein the thermal trip hook 152 is connected to one end of the bimetallic strip 151. The magnetic trip mechanism 16 includes a moving iron core (not labeled), a stationary iron core (not labeled), a magnetic spring (not labeled), and a striker 161.

[0027] As shown in Figure 3.

[0028] A novel circuit breaker also includes an integrated incoming terminal lug 18 for directly introducing an external power supply into the circuit breaker. The lug includes an incoming bottom lug 181 and an incoming connection portion 182. The incoming bottom lug 181 is provided at the bottom of the incoming terminal 11 and is directly connected to the external power supply line. The incoming connection portion 182 is welded to the other end of the bimetallic strip 151. The thickness of the incoming connection portion 182 is less than that of the incoming bottom lug 181.

[0029] It should be noted that, as shown in Figure 3 (A), in a specific embodiment, the integrated incoming terminal lug 181 is composed of an incoming line bottom plate portion 181-1 and an incoming line connection portion 182-1. The incoming line bottom plate portion 181-1 is directly connected to the external power line to conduct the current to the bimetallic strip 151 through the incoming line connection portion 182-1. In this embodiment, the integrated incoming line terminal lug 181 is an integrated design, has no welding points, and has a simple structure, and is suitable for ordinary circuit breakers.

[0030] It should be further explained that, as shown in Figure 3 (B), in another specific embodiment, the circuit breaker has more extensive functions, specifically an intelligent circuit breaker, which includes a current transformer 23. The current transformer 23 can output the circuit data passing through it to the outside at a reciprocal multiple of the number of coils of the current transformer 23, so that the outside can monitor the circuit data of the circuit breaker through the data of the current transformer 23. Therefore, in this embodiment, the integrated incoming terminal terminal piece 181 is composed of an incoming line bottom piece portion 181-2, an incoming line connecting portion 182-2, and a bent portion 183, and the bent portion 183 passes through the current transformer 23.

[0031] As shown in Figure 4.

[0032] The integrated outlet terminal lug 19 is used to output the power in the circuit breaker directly to the external load, and includes a conducting portion 191, a coil portion 192, an outlet bottom plate portion 193, and a guide portion 194. The conducting portion 191 is provided with a static contact 1911. The coil portion 192 is arranged on the outside of the magnetic tripping mechanism 16, and is used to trigger the magnetic tripping mechanism to perform a tripping action when a strong current passes through. The outlet bottom plate portion 193 is arranged at the bottom of the outlet terminal 12, and the guide portion 194 is arranged at the end adjacent to the conducting portion 191 close to the arc extinguishing chamber 17, and is used to guide the arc into the arc extinguishing chamber 17.

[0033] It should be noted that when the moving contact 1421 and the static contact 1911 are closed, the current enters the coil portion 192 through the conductive portion 191; when the moving contact 1421 and the static contact 1911 are separated, the circuit is disconnected, and the arc generated when the moving contact 1421 and the static contact 1911 are separated is introduced into the arc extinguishing chamber 17 through the guide portion 194.

[0034] It should be further explained that the magnetic tripping mechanism of the circuit breaker known to those skilled in the art is a mechanism in which the magnetic field force generated when the current passing through the external coil is too large pushes the moving iron core to compress the magnetic spring, causing the striker to hit the tripping mechanism to achieve tripping. Generally speaking, the external coil is an independent coil, which is connected to the circuit by welding. In this embodiment, the coil portion 192 is integrated on the integrated output terminal terminal piece 19. The integrated design has no welding points, so that the current entering the coil portion 192 is more stable. The coil portion 192 replaces the external coil in the traditional circuit breaker and is arranged on the outside of the magnetic tripping mechanism 16.

[0035] As shown in Figure 5.

[0036] The integrated arc guide plate 20 is used to guide all the arcs generated in the circuit breaker into the arc extinguishing chamber 17 to prevent the circuit hidden dangers caused by the arc overflow. The integrated arc guide plate 20 includes an arc guide access portion 201, an arc guide connection portion 202, an arc guide portion 203, an arc guide side stop portion 204, and an arc guide bottom plate portion 205. The arc guide access portion 201 is movably connected to the other end of the bimetallic strip 151, and the arc guide connection portion 202 extends in the same direction and parallel to the bimetallic strip 151. Extended to a height, the arc-guiding bottom plate portion 205 is placed at the bottom of the arc-extinguishing chamber 17, the arc-guiding portion 203 is arranged between the arc-guiding connecting portion 202 and the arc-guiding bottom plate portion 205, the arc-guiding portion 203 forms a slope angle inclined toward the arc-extinguishing chamber 17, the projection of the static contact 1911 on the arc-guiding portion 203 is close to or in the middle position of the arc-guiding portion 203, and there are two arc-guiding side blocks 204, which are respectively arranged on both sides of the arc-guiding portion.

[0037] It should be noted that an arc baffle plate 21 is also used in conjunction with the integrated arc guide plate 20. The arc baffle plates 21 are two pieces, and each arc baffle plate 21 is respectively arranged on the outside of the corresponding arc guide side baffle 204. The arc baffle plates 21 are made of gas-generating nylon.

[0038] An adjusting portion 22, the adjusting portion 22 is used to adjust the position of the bimetallic strip 151 and the incoming line connection portion 183, or to flexibly connect the bimetallic strip 151, the incoming line connection portion 183 and the arc guide access portion 201 in the circuit breaker, the adjusting portion 22 includes a connecting plate 221 and a set screw 222, the connecting plate 221 is provided with a snap-in groove 2211, a strip-shaped through groove 2212 connected to the snap-in groove 2211, and a strip-shaped through groove 2212 provided on the strip-shaped through groove 2211. 12, the snap-in groove 2211 is used to snap into the bimetallic strip 151 and the incoming line connection portion 183, or to snap into the bimetallic strip 151, the incoming line connection portion 183 and the arc guide access portion 201, and the fixing screw 222 is defined on the housing 10, which passes through the strip-shaped through groove 2212 and is connected to the threaded portion 2213, and the position of each component of the snap-in groove 2211 in the circuit breaker is adjusted by adjusting the fixing screw 222.

[0039] As shown in Figure 6.

[0040] The trip link assembly 141 includes a magnetic trip component 1411, a connecting rod shaft 1412, and a thermal trip component 1413. The magnetic trip component 1411 and the thermal trip component 1413 are connected by interference fit. The magnetic trip component 1411 is provided with a magnetic trip cross bar 14111, an axial hole A14112, and a side trip portion A14113. The magnetic trip cross bar 14111 trips the circuit breaker when it is hit by the striker 161. The thermal trip component 1413 is provided with a matching portion 14131, a thermal trip portion 14132, an axial hole B14133, a side trip portion B14134, and a manual trip portion 14135. The matching portion 14131 and the magnetic trip cross bar 14111 are interference fit. The thermal trip portion 14132 is provided between the thermal trip component 1413 and the magnetic trip component 1411 On the outside of the mating position, the thermal release part 14132 trips the circuit breaker when it is pulled by the thermal release hook 152, the shaft hole B14133 and the shaft hole A14112 are of the same size, and the vertical center lines of the shaft hole B14133 and the shaft hole A14112 are in the same straight line, the manual release part 14135 is connected to the handle assembly 13, and the handle assembly 13 can drive the manual release part 14135 to trip the circuit breaker, the connecting rod shaft 1412 passes through the shaft hole A14112, the moving contact assembly 142, and the shaft hole B14133 in sequence, the side release part A14113 and the side release part B14134 are interference fit, and the vertical center lines of the side release part A14113 and the side release part B14134 are in the same straight line, which is used for the tripping connection when the circuit breaker is mated with the external unit.

[0041] It should be noted that trip slots 101 are provided on both sides of the housing 10, and the trip slots 101 are used to allow the external unit to pass through the circuit breaker housing 10 and connect with the side trip portion A14113 and / or the side trip portion B14134, so as to trip the circuit breaker according to the requirements of the external unit.

[0042] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A novel circuit breaker, comprising a housing, and an incoming terminal, an outgoing terminal, a tripper, a thermal tripping mechanism, a magnetic tripping mechanism, an arc extinguishing chamber, and a handle assembly fixed in the housing, wherein the tripper comprises a tripping connecting rod assembly and a moving contact assembly, wherein the moving contact assembly is provided with a moving contact, wherein the thermal tripping mechanism comprises a bimetallic strip and a thermal tripping hook, wherein the thermal tripping hook is connected to one end of the bimetallic strip, and wherein the magnetic tripping mechanism comprises a moving iron core, a static iron core, a magnetic spring, and a striker, wherein the characteristics are as follows: include: An integrated incoming line terminal lug is used to directly introduce an externally connected power source into the circuit breaker, comprising an incoming line bottom plate portion and an incoming line connection portion, wherein the incoming line bottom plate portion is arranged at the bottom of the incoming line terminal and is used to directly connect to an externally connected power line, the incoming line connection portion is welded to the other end of the bimetallic strip, and the thickness of the incoming line connection portion is smaller than that of the incoming line bottom plate portion; The integrated output terminal lug is used to output the power in the circuit breaker directly to the external load, and is provided with at least one coil portion, which is arranged outside the magnetic tripping mechanism and is used to trigger the magnetic tripping mechanism to perform a tripping action when a strong current passes through.

2. A novel circuit breaker according to claim 1, characterized in that: It also includes an integrated arc guide plate, which is used to guide all the arcs generated in the circuit breaker into the arc extinguishing chamber to prevent circuit hazards caused by arc overflow. The integrated arc guide plate includes an arc guide access portion, an arc guide connecting portion, an arc guide portion, an arc guide side stop portion, and an arc guide bottom plate portion. The arc guide access portion is welded to the other end of the bimetallic strip, the arc guide connecting portion extends in the same direction and parallel to the bimetallic strip for a height, the arc guide bottom plate portion is placed at the bottom of the arc extinguishing chamber, the arc guide portion is arranged between the arc guide connecting portion and the arc guide bottom plate portion, the arc guide portion forms a slope angle inclined toward the arc extinguishing chamber, and there are two arc guide side stops, which are respectively arranged on both sides of the arc guide portion.

3. A novel circuit breaker according to claim 2, characterized in that: It also includes an arc baffle plate, which is divided into two pieces. Each arc baffle plate is respectively arranged on the outer side of the corresponding arc-guiding side baffle portion, and the arc baffle plate is made of gas-generating nylon.

4. A novel circuit breaker according to claim 2, characterized in that: It also includes an adjusting portion, which is used to adjust the position of the bimetallic strip and the incoming line connection portion, or adjust the position of the bimetallic strip, the incoming line connection portion and the arc guide access portion in the circuit breaker. The adjusting portion includes a connecting plate and a fixing screw. The connecting plate is provided with a snap-in groove, a strip-shaped through groove connected to the snap-in groove, and a threaded portion provided on the strip-shaped through groove. The snap-in groove is used to snap-in the bimetallic strip and the incoming line connection portion, or snap-in the bimetallic strip, the incoming line connection portion and the arc guide access portion. The fixing screw is defined on the housing, passes through the strip-shaped through groove and is connected to the threaded portion. The position of each component of the snap-in groove in the circuit breaker is adjusted by adjusting the fixing screw.

5. A novel circuit breaker according to claim 1, characterized in that: The trip connecting rod comprises a magnetic trip component, a thermal trip component and a connecting rod shaft. The magnetic trip component and the thermal trip component are connected by interference fit. The magnetic trip component is provided with a magnetic trip cross bar, an axial hole A and a side trip portion A. The magnetic trip cross bar trips the circuit breaker when hit by the striker. The thermal trip component is provided with a matching portion, a thermal trip portion, an axial hole B, a side trip portion B and a manual trip portion. The matching portion and the magnetic trip cross bar are interference fit. The thermal trip portion is arranged on the outside of the matching position between the thermal trip component and the magnetic trip component. The release part causes the circuit breaker to trip when subjected to the pulling force of the thermal release hook, the shaft hole B and the shaft hole A have the same size, and the vertical center lines of the shaft hole B and the shaft hole A are in the same straight line, the manual release part is connected to the handle assembly, and the handle assembly can drive the manual release part to trip the circuit breaker, the connecting rod shaft passes through the shaft hole A, the moving contact assembly, and the shaft hole B in sequence, the side release part A and the side release part B are interference fit, and the vertical center lines of the side release part A and the side release part B are in the same straight line, which is used for the tripping connection when the circuit breaker cooperates with the external unit.

6. A novel circuit breaker according to claim 5, characterized in that: Both sides of the housing are provided with tripping grooves, and the tripping grooves are used to allow an external unit to pass through the circuit breaker housing and connect with the side tripping portion A and / or the side tripping portion B, so as to trip the circuit breaker according to the requirements of the external unit.

7. A novel circuit breaker according to claim 1, characterized in that: It also includes a current transformer, and the integrated incoming terminal terminal piece also includes a bent portion, the bent portion passes through the current transformer, and the current transformer outputs the current passing through the bent portion at a reciprocal multiple of the number of coils of the current transformer.

8. A novel circuit breaker according to claim 2, characterized in that: The integrated outlet terminal terminal piece is also provided with a conducting portion, an outlet bottom sheet portion, and a guiding portion. The conducting portion is provided with a static contact, and the projection of the static contact on the arc guiding portion is close to or in the middle position of the arc guiding portion. The outlet bottom sheet portion is arranged at the bottom of the outlet terminal, and the guiding portion is arranged at the end adjacent to the conducting portion, close to the arc extinguishing chamber, for guiding the arc into the arc extinguishing chamber.

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