WO2020108624A1

WO2020108624A1 - Circuit breaker

Info

Publication number: WO2020108624A1
Application number: PCT/CN2019/122030
Authority: WO
Inventors: 刘瑾; 李�杰; 朱俊; 李罗斌
Original assignee: 浙江正泰电器股份有限公司
Priority date: 2018-11-30
Filing date: 2019-11-29
Publication date: 2020-06-04

Abstract

A circuit breaker, comprising a housing and a circuit breaker phase pole and a leakage protection pole provided on the two sides of the housing side by side. The leakage protection pole comprises a zero-sequence current transformer, a leakage operation mechanism, and a leakage test mechanism; a main loop of the circuit breaker phase pole passes through the zero-sequence current transformer; the leakage test mechanism comprises an elastic piece, a test button, and a first contact piece and a second contact piece respectively connected to the two ends of a test loop; one end of the elastic piece is provided with a first contact part matching the leakage operation mechanism or a phase pole operation mechanism, and the other end of the elastic piece is provided with a second contact part matching the test button; the leakage operation mechanism or the phase pole circuit breaker is capable of pushing the first contact part to make contact with the first contact piece when the circuit breaker is switched on; the test button is capable of pushing the second contact part to make contact with the second contact piece; the test mechanism forms the test loop having double breakpoints by means of two contacts of the first contact part and the second contact part on the elastic piece, and the first contact part and the second contact part are respectively driven by the leakage operation mechanism and the test button.

Description

breaker

Technical field

The invention relates to the field of low-voltage electrical appliances, in particular to a circuit breaker.

Background technique

The test mechanism of the circuit breaker is usually limited by the housing space. The test circuit of the test mechanism usually adopts a single breakpoint structure. However, when the circuit breaker is opened, if the test button of the test mechanism is pressed, the outlet end of the circuit breaker will be because of the test circuit. There is a voltage to ground due to conduction, and there is a risk of electric shock during use, and it does not meet the safety regulations of specific areas. There are certain limitations. Therefore, some circuit breakers changed the test circuit of the test institution to a double-breakpoint structure. A breakpoint in the point is controlled by the handle, and the test circuit will be turned on when the test button is pressed when the handle is closed, but the speed of the breakpoint conduction and disconnection is affected by the speed of the handle closing and opening, if the handle appears slow The problem of resetting will lead to slow breakpoint breaking speed. At this time, if the circuit breaker is reversed, pressing the test button will cause the test circuit to open slowly, causing the coil of the circuit breaker to heat up and burn out, and the problem of circuit breaker failure is serious. Affect the reliability of the circuit breaker.

Summary of the invention

The purpose of the invention is to overcome the defects of the prior art and provide a circuit breaker with a simple structure and high reliability.

In order to achieve the above purpose, the invention adopts the following technical solutions:

A circuit breaker includes a case and a circuit breaker phase pole and a leakage protection pole arranged side by side on the case, the leakage protection pole includes a zero-sequence current transformer, a leakage operation mechanism and a leakage test mechanism, and the circuit breaker phase pole The main circuit of the system passes through the zero-sequence current transformer; the leakage test mechanism includes an elastic member, a test button, and first and second contact members respectively connected to both ends of the test circuit. One end of the elastic member is provided with a leakage operating mechanism or The first contact part of the phase pole operating mechanism, the other end of the elastic member is provided with a second contact part cooperating with the test button. The leakage operating mechanism or the phase pole operating mechanism can push the first contact part and the first contact part when the circuit breaker is closed. When one contact piece is in contact, the test button can push the second contact portion to contact the second contact piece.

Preferably, an embodiment of the present invention improves that when the circuit breaker is closed, the leakage operating mechanism pushes the first contact portion into contact with the first contact piece. The leakage operation mechanism includes a protection lever pivotally installed in the housing, and a protection jumper and a protection lock that are pivotally installed on the protection lever and snap-fit with each other. The protection jumper is hinged to one end of the protection link, The other end of the protection link is hinged to the handle of the circuit breaker, one end of the protection lock is provided corresponding to the leakage release, the first contact is provided on the side of the protection lever, and the first contact portion of the elastic member extends to the protection lever and the first A contact piece cooperates with the protection lever, and the elastic piece drives the protection lever to rotate faster when it is tripped.

Preferably, the elastic member is a torsion spring, the elastic member includes a spiral portion connected between the first contact portion and the second contact portion, the spiral portion is mounted on the spring shaft of the housing, and the first contact portion and the second contact The parts are all arranged perpendicular to the axis of the spiral part, the first contact part extends between the protection lever and the first contact piece, and the second contact part extends between the test button and the second contact piece.

Preferably, the first contact piece and the second contact piece are arranged below the leakage operating mechanism, the first contact piece is arranged between the second contact piece and the elastic member, and the test button is located on the side of the leakage operating mechanism Above the second contact portion, the length of the second contact portion is greater than the length of the first contact portion, the end of the second contact portion near the spiral portion cooperates with the test button, and the other end of the second contact portion passes through the side of the first contact It extends above the second contact piece, and a test resistor connected to the first contact piece is provided below the first contact piece and the elastic piece.

Preferably, the back side of the protection lever is provided with a first pushing boss extending toward the first contact portion, and the side of the protection lever is provided with a second pushing boss extending toward the side. A pushing step surface that limits the first contact portion is formed between the first pushing bosses.

An improvement of another embodiment of the present invention is that when the circuit breaker is closed, the first contact part is pushed into contact with the first contact by the phase pole operating mechanism, the phase pole of the circuit breaker includes the phase pole operating mechanism, and the relatively provided static The contact and the moving contact, the moving contact is connected to the phase pole operating mechanism; the leakage protection pole includes a neutral pole static contact and a neutral pole moving contact which are relatively arranged in the housing, and the phase pole when the circuit breaker is closed The operating mechanism pushes the first contact portion into contact with the first contact through a neutral drive connected to the neutral polar contact.

Preferably, the neutral drive member includes a protection drive rod and a shaft coupling drive rod, one end of the protection drive rod is connected to a neutral polar contact, and the protection drive rod is hinged to the phase pole operating mechanism via the shaft coupling drive rod; an elastic member The first contact part of the is matched with a protection driving rod, which drives the first contact part to contact the first contact piece, the neutral polar contact is connected to one end of the return spring, and the other end of the return spring is connected to the housing.

Preferably, the elastic member is a torsion spring, the elastic member includes a spiral portion connected between the first contact portion and the second contact portion, the spiral portion is sleeved on the spring shaft and connected to the housing, the first contact portion and the second The contact portions are all arranged perpendicular to the axis of the spiral portion; the second contact piece is arranged on the side of the neutral polar contact close to the neutral pole static contact, and the first contact piece and the elastic piece are arranged on the neutral polar contact The side where the head is away from the neutral pole contact, the neutral pole contact is connected to the second contact piece through a return spring, and the second contact portion passes from the side of the neutral pole contact to cooperate with the second contact piece, The first contact is connected to the test resistor provided below the first contact.

Preferably, the first contact piece and the shaft coupling drive rod are arranged oppositely on both sides of the elastic piece, and a fourth contact arm with a V shape is provided on the first contact portion, and one end of the fourth contact arm approaches the shaft One side of the coupling driving lever is inclined, and the other end of the fourth contact arm is inclined toward the side close to the first contact piece.

Preferably, one end of the shaft coupling drive rod is connected to one end of the protection drive rod, and the protection lever is provided with a through hole of the shaft coupling drive rod cooperating with the other end of the shaft coupling drive rod; at the other end of the protection drive rod There is a contact driving rod rotatably connected with the neutral polar contact; one end of the protective driving rod is stacked on the protection lever, and the neutral polar contact is stacked on the other end of the neutral polar contact.

Preferably, the test button includes a button connecting part and a button operating part and a button pushing part respectively provided at both ends of the button connecting part, the other end of the button operating part protrudes from the housing, and the other end of the button pushing part and the second contact part The button connection part is connected to one end of the top side of the button pushing part, and the other end of the top side of the button pushing part is matched with the limit of the housing. On the bottom side of the button pushing part, there are A button pushing portion and a second button pushing portion form a button pushing groove that is limited to and cooperates with the second contact portion between the first button pushing portion and the second button pushing portion.

The circuit breaker created by the present invention is a leakage circuit breaker, including a circuit breaker phase pole and a leakage protection pole. The test mechanism provided in the leakage protection pole is composed of two contacts of a first contact portion and a second contact portion on the elastic member. Double-breakpoint test circuit, and the first contact part is driven by a leakage operating mechanism or phase pole operating mechanism, and the second contact part is driven by a test button, which not only ensures that the test button is not turned on when the circuit breaker phase pole is opened Test the circuit to improve the reliability of the circuit breaker.

In addition, in an improved embodiment of the present invention, the elastic member cooperates with the leakage operating mechanism to increase the operating speed of the leakage operating mechanism. Moreover, the elastic member adopts the torsion spring not only to be directly installed in the casing, but also the casing limits one end of the elastic member through the spring limiting groove, which can further reduce the difficulty of assembly, and has the characteristics of simple structure and low cost. The first conductive plate cooperates with the protection lever and the first contact part by suspending one end, which can be elastically buffered when contacting the first contact part to avoid damage to the case due to hard contact.

In addition, in a third improved embodiment of the present invention, the elastic member cooperates with the phase pole operating mechanism, and the phase pole operating mechanism simultaneously drives the neutral pole contact through the neutral drive member, and the elastic member is driven by the neutral drive member to ensure that the circuit breaker Pressing the test button when the phase pole opens does not turn on the test circuit, which greatly improves the reliability of the circuit breaker, and the elastic member cooperates with the operating mechanism to increase the operating speed of the operating mechanism, especially when the line is overloaded or leaks current , The circuit breaker can be tripped faster to cut off the line.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the top side structure of the circuit breaker;

2 is a schematic structural diagram of a leakage protection electrode in Embodiment 1;

3 is a front view of the leakage protection electrode in the first embodiment;

4 is a schematic diagram of another structure of the leakage protection electrode in the first embodiment;

5 is a schematic structural diagram of an elastic member in Embodiment 1;

6 is a schematic structural view of a first contact piece in Embodiment 1;

7 is a schematic structural diagram of a test button in Embodiment 1;

8 is a schematic structural diagram of the front side of the protection lever in Embodiment 1;

9 is a schematic structural view of the back of the protection lever in the first embodiment;

10 is a front view of the phase pole of the circuit breaker in the second embodiment;

11 is a front view of the leakage protection electrode in the second embodiment;

12 is a schematic diagram of the cooperation of the leakage test mechanism and the leakage operation mechanism in the second embodiment;

13 is a schematic diagram of a neutral polar moving contact, a protection driving rod, a protection lever and a cooperation in the second embodiment;

14 is a side view of FIG. 12;

15 is a schematic structural view of an elastic member in Embodiment 2;

16 is a schematic structural view of a protective driving rod in Embodiment 2;

17 is a schematic structural diagram of a test button in Embodiment 2;

FIG. 18 is a schematic diagram of the cooperation between the coupling drive rod and the protection lever of the central shaft machine in the second embodiment;

19 is a plan view of the elastic member in the third embodiment;

20 is a side view of the elastic member in the third embodiment;

21 is a schematic diagram of a partial structure of a circuit breaker in Embodiment 3;

22 is a schematic diagram of the cooperation of the leakage testing mechanism and the leakage operating mechanism in the third embodiment;

23 is another schematic diagram of the cooperation of the leakage test mechanism and the leakage operation mechanism in Embodiment 3;

24 is a schematic structural view of the leakage protection electrode in Embodiment 3;

25 is a schematic structural view of the phase pole operating mechanism in the third embodiment;

26 is a schematic diagram of the current flow in the leakage test circuit when the circuit breaker is being wired;

Figure 27 is a schematic diagram of the current flow in the leakage test circuit when the circuit breaker is reversed.

detailed description

The specific embodiments of the circuit breaker created by the present invention will be further described below with reference to the embodiments given in FIGS. 1 to 27. The circuit breaker created by the present invention is not limited to the description of the following embodiments.

As shown in Figures 1-4 and 9-10, the circuit breaker created by the present invention includes a case and a circuit breaker phase pole 1 and a leakage protection pole 2 arranged side by side on the case, and a circuit breaker phase pole 1 and a leakage protection pole A separator 32 is provided between the poles 2. The phase pole 1 of the circuit breaker includes a stationary contact 111 and a movable contact 112 which are oppositely arranged and respectively connected to the circuit. The movable contact 112 is installed on the phase pole operating mechanism 14 to swing and contact statically. The head 111 cooperates, the leakage protection pole 2 includes a zero sequence current transformer 21, a leakage operation mechanism 22 and a leakage test mechanism 25, the main circuit of the circuit breaker phase pole 1 passes through the zero sequence current transformer 21, the zero sequence current transformer 21 When a leakage current occurs in the main circuit, the leakage pole operating mechanism 22 unlocks the phase pole operating mechanism 14 to drive the moving contact 112 away from the static contact 111;

The leakage testing mechanism 25 includes an elastic member 26, a test button 29, and a first contact member 27 and a second contact member 28 respectively connected to the main circuit of the circuit breaker phase pole 1. One end of the elastic member 26 is provided with a leakage operating mechanism 22 Or the first contact portion 261 of the phase pole operating mechanism 14, the other end of the elastic member 26 is provided with a second contact portion 262 cooperating with the test button 29, the leakage operating mechanism 22 or the phase pole operating mechanism 14 can 1 When closing, push the first contact portion 261 to contact the first contact 27, the test button 29 can push the second contact portion 262 to contact the second contact 28, the first contact portion 261 and the second contact portion 262 respectively When one contact 27 and the second contact 28 are in contact, the test circuit can be turned on to generate a leakage test signal in the main circuit.

In the circuit breaker created by the present invention, the test mechanism 25 forms a test circuit with double breakpoints through the two contacts of the first contact portion 261 and the second contact portion 262 on the elastic member 26, which can not only ensure 1 minute Pressing the test button 29 at the time of the brake does not conduct the test circuit, which improves the reliability of the circuit breaker, and the first contact portion 261 cooperates with the leakage operating mechanism 22 or the phase pole operating mechanism 14 to increase the leakage operating mechanism 22 or the phase pole The operating speed of the operating mechanism 14, especially when an overload or leakage current occurs on the line, can help the leakage operating mechanism 22 trip the circuit breaker faster to cut off the line.

As shown in FIG. 10, an embodiment of the phase pole operating mechanism 14 includes a circuit breaker energy storage member, a rocker arm 141 pivotally mounted in the housing and connected to the moving contact 112, and pivotally mounted respectively The jumper 142 and the lock catch 143 on the rocker arm 141 and snap fit with each other, and the connecting rod 144 hinged with the jumper 142, the other end of the connecting rod 144 is hinged with the circuit breaker handle 31 extending out of the housing, when the jumper When the 142 and the lock catch 143 are snap-fitted with each other, the phase pole operating mechanism 14 maintains balance, and the circuit breaker handle 31 can drive the phase pole operating mechanism 14 to drive the moving contact 112 and the static contact 111 to contact the main circuit and separate the main circuit. The circuit uses closing and opening circuit breakers, and stores energy for the circuit breaker energy storage during the closing process.

Further, the circuit breaker phase pole 1 includes an electromagnetic trip mechanism 12, a double-gold trip mechanism 13 and an arc extinguishing mechanism. The static contact 111 is fixed in the housing through the main circuit conductive member and the electromagnetic trip mechanism 12 and the terminal 15 on the left end Connection, the moving contact 112 is installed on the phase pole operating mechanism 14 and swings to cooperate with the static contact 111, and is connected to the double gold trip mechanism 15 and the circuit breaker terminal 14 on the right side through the main circuit conductive member. During overload and leakage, the electromagnetic trip mechanism 12, the double-gold trip mechanism 13 and the leakage operating mechanism 22 drive the jumper 142 and the lock 143 to be separated from each other, and the phase pole operating mechanism 14 is out of balance. The energy release drives the contact 112 away from the static contact 111 to disconnect the main circuit and cut off the fault circuit to achieve protection.

2-9 show a first embodiment of the circuit breaker created by the present invention, the leakage operating mechanism 22 and the leakage testing mechanism 25 are correspondingly disposed on the side above the zero-sequence current transformer 21, above the zero-sequence current transformer 21 The other side is provided with a leakage release 23, a circuit breaker handle 31 is correspondingly disposed above the leakage release 23, the leakage operation mechanism 22 includes a protective lever 221 pivotally installed in the housing, and respectively pivotally installed The protective jumper 222 and the protective lock 224 are snap-fitted on the protective lever 221, the protective jumper 222 is hinged to one end of the protective link 223, and the other end of the protective link 223 is hinged to the circuit breaker handle 31 to protect the lock One end of the buckle 224 corresponds to the leakage release 23, the first contact 27 is provided on the side of the protection lever 221, and the first contact portion 261 of the elastic member 26 extends between the protection lever 221 and the first contact 27 When the protection lever 221 cooperates and the circuit breaker handle 31 rotates to the closed position, the protection lever 221 is driven to rotate by the protection link 223, the protection jumper 222 and the protection lock 224 and pushes the first contact portion 261 to contact the first contact 27 When the circuit breaker handle 31 rotates to the opening position, the protection lever 221 is driven away from the first contact portion 261, and the first contact portion 261 resets under its own elasticity and pushes the circuit breaker handle 31 to accelerate to the opening position.

5 shows a first embodiment of the elastic member 26, the elastic member 26 is a torsion spring, the elastic member 26 includes a spiral portion 263 connected between the first contact portion 261 and the second contact portion 262, the spiral portion 263 is mounted on the spring shaft 260 of the housing, the first contact portion 261 and the second contact portion 262 are both perpendicular to the axis of the spiral portion 263, and the first contact portion 261 extends between the protection lever 221 and the first contact 27 The second contact portion 262 extends between the test button 29 and the second contact 28. The first contact portion 261 includes a first contact arm 261a, a second contact arm 261b, and a third contact arm 261c connected in a U-shape. A contact arm 261a is disposed opposite to the third contact arm 261c, the second contact arm 261b is vertically connected between the first contact arm 261a and one end of the third contact arm 261c, and the other end of the first contact arm 261a is connected to the spiral portion 263 , The other end of the third contact arm 261c is connected to the fourth contact arm 261d, the fourth contact arm 261d extends between the test button 29 and the second contact piece 28, and a limiting first contact arm 261a, a second The spring limiting groove 261e of the contact arm 261b and the third contact arm 261c. The elastic member 26 adopts a torsion spring not only can be directly installed in the casing, but also the casing limits one end of the elastic member 26 through the spring limiting groove 261e, which can further reduce the difficulty of assembly, and has the characteristics of simple structure and low cost .

Further, the fourth contact arm 261d and the second contact portion 262 are disposed substantially in parallel, and the first contact arm 261a, the second contact arm 261b, and the third contact arm 261c are disposed perpendicular to the second contact portion 262, which can improve the elastic member The balance of 26 can be more reliably fixed in the housing when the elastic member 26 receives torque.

Further, the first contact 27 and the second contact 28 are disposed below the leakage operating mechanism 22, the first contact 27 is disposed between the second contact 28 and the elastic member 26, and the test button 29 is located at the leakage The operating mechanism 22 is on one side and above the second contact portion 262. The length of the second contact portion 262 is greater than the length of the fourth contact arm 261d of the first contact portion 261. The end of the second contact portion 262 near the spiral portion 263 and the test button 29, the other end of the second contact portion 262 passes from one side of the first contact member 27 and extends above the second contact member 28, and there is a lower part between the first contact member 27 and the elastic member 26 The test resistor 251 connected to the first contact 27 not only has the characteristics of compact structure and small volume, but also the length of the second contact portion 262 is longer than that of the first contact portion 261, and the second contact portion 262 and the second contact 28 The elasticity of the second contact portion 262 during contact can avoid damage to the second mounting boss 280, and the contact is more reliable.

A preferred embodiment of the first contact 27 is shown in conjunction with FIG. 6. The first contact 27 includes a first conductive plate 271 disposed along the axis of the spiral portion 263, and the elastic member 26 is spaced from the partition 32 along the axis It is provided that one end of the first conductive plate 271 is connected to the partition plate 32, and the other end of the first conductive plate 271 extends to the side of the protection lever 221 along the axis of the spiral portion 263 and is suspended. The first conductive plate 271 cooperates with the protective lever 221 and the first contact portion 261 by suspending one end, which can be elastically buffered when contacting the first contact portion 261 to avoid damage to the case due to hard contact.

Further, the first contact 27 further includes a second conductive plate 272, the length of the second conductive plate 272 is perpendicular to the first conductive plate 271, and one end of the second conductive plate 272 and one end of the first conductive plate 271 Relatively arranged, one end of the second conductive plate 272 is connected to the side of the first conductive plate 271 through the third conductive plate 273 to form a U-shaped first mounting portion, and the partition 32 is provided with a first mounting portion The connected first mounting groove 270, the other end of the second conductive plate 272 extends outward from the first mounting groove 270, the second conductive plate 272 can not only facilitate the reliable connection of the first contact 27 and the housing by forming a U-shaped structure, Moreover, the first contact member 27 can be easily grasped and plays a foolproof role during assembly, which can effectively reduce the difficulty of assembly.

Furthermore, the side of the first conductive plate 271 near the elastic member 26 is connected to the fourth conductive plate 274, and the third conductive plate 273 is connected to the side of the first conductive plate 271 away from the elastic member 26 so that U The opening of the first mounting portion of the type faces the elastic member 26. Between the elastic member 26 and the first conductive plate 271, a test resistor 251 is provided on the side away from the second conductive plate 272, and one end of the fourth conductive plate 274 is connected to the first One side of the opening is vertically connected, and the other end of the fourth conductive plate 274 extends toward the test resistor 251, and a connection hole 275 for connecting the test resistor 251 on the fourth conductive plate 274. The first contact 27 is not only compact by providing the opening of the first mounting portion toward the test resistor 251 on the side of the elastic portion 26, while providing the fourth conductive plate 274 extending toward the test resistor 251 on the side of the opening of the first mounting portion The structure of the first conductive plate 271 reduces the occupied space and volume, and can be easily connected to the test resistor 251 by welding or the like. In addition, the lead at one end of the test resistor 251 can first pass through the connection hole 275 to form an interlock with the fourth conductive plate 274 and then be connected to the fourth conductive plate 274, which can not only improve the strength of the connection, but also reduce the difficulty of the connection. Preferably, resistance fixing plates 252 are respectively provided at both ends of the test resistor 251, and two resistance fixing plates 252 are respectively provided with escape holes for avoiding the leads at both ends of the test resistance 251. Of course, the test resistor 251 may not be provided, and the opening of the U-shaped first mounting portion may also face the side away from the elastic member 26, which falls within the protection scope created by the present invention.

Referring to FIG. 3, a preferred embodiment of the second contact 28 is shown. The partition 32 is provided with a second mounting boss 280 disposed along the axis of the spiral portion 263. The second contact 28 includes a U-shaped and The first conductive wire 281 that is snapped on the second mounting boss 280, one end of the first conductive wire 281 is located on the top side of the second mounting boss 280 and cooperates with the second contact portion 262, and the other end of the first conductive wire 281 The bottom side of the second mounting boss 280 is connected to the main circuit conductive member through the second conductive wire 282.

Referring to FIG. 7, a first embodiment of the test button 29 is shown. The test button 29 includes a button connection portion 291 and a button operation portion 292 and a button push portion 293 respectively provided at both ends of the button connection portion 291, and the other end of the button operation portion 292 Protruding from the housing, the other end of the button pushing portion 293 cooperates with the second contact portion 262, the button pushing portion 293 is spaced apart from the partition 32, and a button guide plate 294 extending to the button pushing portion 293 is provided on the partition 32 FIG. 3), a button guide groove 295 slidingly engaged with the button guide plate 294 is provided on the side of the button pushing portion 293, and the test button 29 is guided by the button guide plate 294, so that the test button 29 can be operated more smoothly and reliably.

Further, the button connecting portion 291 is provided with a U-shaped button convex folding portion 291a, and a button escape space 291b (FIG. 2) is formed between the button convex folding portion 291a and the side wall of the housing, the button convex folding portion 291a is connected to one end of the top side of the button pushing portion 293, and the other end of the top side of the button pushing portion 293 is engaged with the limit of the housing. On the bottom side of the button pushing portion 293, there are A button pushing portion 297 and a second button pushing portion 298 are formed between the first button pushing portion 297 and the second button pushing portion 298, and a button pushing groove 299 that is limited to cooperate with the second contact portion 262.

Furthermore, the side surface of the button guide plate 294 is provided with a contact guide groove 296 that cooperates with the first contact portion 261. The first contact portion 261 can be contacted along with the test button 29 and when it is elastically reset by itself The guide groove 296 slides and the contact guide groove 296 restricts the position of the first contact portion 261 after resetting, so that the button guide plate 294 can also guide the first contact portion 261 when guiding the test button 29. In addition, the button The guide plate 294 may also constitute a side wall of the spring limiting groove 261e.

8-9 shows a first embodiment of the protection lever 221, the protection lever 221 is fan-shaped, a protection lever shaft hole 2210 is provided in the middle of the side of the protection lever 221, which is rotatably connected to the housing, and the front side of the protection lever 221 is protected The central part is provided with a lock shaft hole 2218 connected to the lock 224, and correspondingly provided with a jumper shaft 2217 and a protection lever shaft 2216 on both sides of the lock shaft hole 2218, the jumper shaft 2217 is connected to the jumper 222 for protection The lever shaft 2216 is connected to the housing; the back of the protection lever 221 corresponds to the first lever boss 2214 on the other side of the protection lever shaft hole 2210, and the back of the protection lever 221 corresponds to the top angle of the side of the protection lever shaft hole 2210 A first pushing boss 2211 extending toward one side of the first contact portion 261 is provided, and a second lever boss 2215 is provided at the other side of the protection lever shaft hole 2210 relative to the first pushing boss 2211. The side of the boss 2214 away from the protection lever shaft hole 2210 is provided with a first lever groove 2215. By providing a first pushing boss 2211 on the protection lever 221 to push the first contact portion 261, the first contact portion 261 and the first The contact 27 is in reliable contact.

The protection lever 221 is provided with a second pushing boss 2212 extending laterally at the top corner of the first pushing boss 2211, and a pair of first push boss 2212 and the first pushing boss 2211 are formed The pushing step surface 2213 limited by the contact portion 261 can make the protection lever 221 cooperate with the first contact portion 261 more reliably, and prevent the first contact portion 261 and the first pushing boss 2211 from being misaligned.

10-18 shows a second embodiment of the circuit breaker created by the present invention, the leakage protection pole 2 includes a zero-sequence current transformer 21, a leakage operation mechanism 22, a leakage test mechanism 25, and a relatively disposed in the housing The polar static contact 211 and the neutral polar contact 212, the neutral polar contact 212 is connected to the leakage operating mechanism 22 through the protection drive rod 225, and the other end of the protection drive rod 225 is coupled to the leakage through the shaft coupling drive rod 220 One side of the operating mechanism 22 is hinged, the other side of the leakage operating mechanism 22 is connected to the circuit breaker handle 31, the swing plane of the shaft coupling drive rod 220 and the protection driving rod 225 are arranged vertically, and both ends of the shaft coupling drive rod 220 Connected to the protection drive rod 225 and the leakage operating mechanism 22 respectively, the first contact 27 is provided on one side of the shaft coupling drive rod 220, and the first contact portion 261 of the elastic member 26 extends to the shaft coupling drive rod 220 and the first The contact parts 27 cooperate with the middle of the shaft coupling drive rod 220. The test button 29 can push the second contact part 262 to contact the second contact 28. When the circuit breaker is closed, the shaft coupling drive rod 220 pushes the first contact The portion 261 is in contact with the first contact 27.

When the circuit breaker handle 31 rotates to the closing position, the leakage operating mechanism 22 drives the protection drive rod 225 through the shaft coupling drive rod 220 to drive the neutral pole contact 211 and the neutral pole contact 212 into contact, and is coupled through the shaft motor The driving rod 220 pushes the first contact part 261 into contact with the first contact 27. When the circuit breaker handle 31 rotates to the opening position, the shaft coupling drive lever 220 is driven away from the first contact part 261, and the first contact part 261 is on its own. Under the action of elasticity, it resets and pushes the circuit breaker handle 31 to accelerate to the open position. In this embodiment, on the basis of the double-breakpoint test circuit, the first contact portion 261 is driven by the moving shaft coupling drive rod 220 of the leakage operating mechanism 22 to contact the first contact 27, which not only ensures that the circuit breaker phase pole Pressing the test button 29 at the time of 1 opening does not conduct the test circuit, which further improves the reliability of the circuit breaker, and the elastic member 26 cooperates with the coupling drive rod 220 of the moving shaft machine to further increase the operating speed of the leakage operating mechanism 22.

As a preferred embodiment of the leakage operation mechanism 22, the leakage operation mechanism 22 includes a protection lever 221 pivotally installed in the housing, and a protection jumper 222 and a protection that are pivotally installed on the protection lever 221 and snap-fit with each other The lock 224, the protection jumper 222 is hinged to one end of the protection link 223, the other end of the protection link 223 is hinged to the circuit breaker handle 31, the protection drive rod 225 is hinged to the protection lever 221 through the shaft coupling, the neutral The polar contact 212 is hinged to the protection drive rod 225, and the neutral polar contact 212 is connected to one end of the return spring 227, the other end of the return spring 227 is connected to the housing, and the circuit breaker handle 31 is connected to the protection jumper 222 and the protection lock When the 224 snap fits with each other, the neutral polar contact 212 can be driven to swing by the protection driving rod 225. One end of the protection shaft coupling drive rod 220 is connected to one end of the protection driving rod 225, and the protection lever 221 is provided with a through hole of the shaft coupling drive rod cooperating with the other end of the shaft coupling drive rod 220. The other end passes through the through hole of the shaft coupling drive rod and extends to the other side of the protection lever 221 and is connected to the restricting member 226. Of course, the leakage operation mechanism 22 can also adopt other schemes.

3, the circuit breaker closing process is: the circuit breaker handle 31 rotates clockwise, the handle 31 pushes the connecting rod 223, the connecting rod 223 pushes the jumper 222 and the lock catch 224 to drive the protection lever 221 to rotate clockwise, and passes the protection lever 221 compresses the elastic member 261 to store energy until the mechanism is closed.

The tripping process is: when there is overload or leakage current in the line, the leakage tripper 23 pushes the lock 224 and the jumper 222 to release and release the protection lever 221, and the protection lever 221 can be counterclockwise under the action of the return spring and the contraction elastic 261 The direction turns faster.

Further, one end of the return spring 227 is connected to the neutral polar contact 212 and the other end is connected to the second contact 28. The second contact 28 functions as a test circuit breakpoint and at the same time as a fixed return spring 227. At the same time, the return spring 227 not only plays a role of cooperating with the neutral polar contact 212, but also plays a role of electrically connecting the neutral polar contact 212 and the second contact 28.

Further, the second contact 28 is disposed on the side of the neutral polar contact 212 close to the neutral polar contact 211, and the first contact 27 and the elastic member 26 are disposed away from the neutral polar contact 212 On one side of the polar static contact 211, the neutral polar contact 212 is connected to the second contact 28 through a return spring 227, and the second contact portion 262 passes from the side of the neutral polar contact 212 to the second contact 28, the first contact 27 is connected to the test resistor 251 disposed below the first contact 27, by placing the first contact 27 and the second contact 28 on both sides of the neutral pole contact 211 , Not only has the characteristics of compact structure, short travel stroke and fast action speed, but also the second contact 28 plays the role of resetting the neutral polar contact 212 by connecting with the return spring 227 based on the function of the conduction test circuit , One stone and two birds, clever design.

12-16 shows a preferred embodiment of the protection drive rod 225, one end of the protection drive rod 225 is provided with a shaft coupling drive boss 2251 arranged axially along the shaft coupling drive rod 220, coupled with the shaft drive The boss 2251 is provided with a shaft coupling driving hole 2252 sleeved on the shaft coupling driving rod 220, a contact driving boss 2253 is provided at the other end of the protection driving rod 225, and a contact driving boss 2253 is provided A contact driving rod 2254 that is rotationally connected to the neutral polar contact 212. The contact driving rod 2254 is perpendicular to the swing plane of the neutral polar contact 212, and one end of the protective driving rod 225 is stacked on the protective lever 221. The sexually polarized contacts 212 are stacked on the other end of the protection driving rod 225. In this embodiment, the shaft drive coupling drive hole 2252 is provided at one end of the protection drive rod 225, and the contact drive rod 2254 is provided at the other end of the protection drive rod 225, which has the characteristics of simple structure, easy processing and easy assembly, and the shaft machine coupling The driving boss 2251 can increase the strength of the connection between the shaft coupling drive hole 2252 and the shaft coupling drive rod 220.

15 shows a second embodiment of the elastic member 26, the elastic member 26 is a torsion spring, the elastic member 26 includes a spiral portion 263 connected between the first contact portion 261 and the second contact portion 262, the spiral portion 263 is sleeved on the spring shaft 260 and connected to the housing. The first contact portion 261 and the second contact portion 262 are both perpendicular to the axis of the spiral portion 263. The first contact portion 261 extends to protect the driving rod 225 and the first contact 27 In between, the second contact portion 262 extends between the test button 29 and the second contact 28.

The first contact portion 261 includes a first contact arm 261a, a second contact arm 261b, and a third contact arm 261c connected in a U-shape, the first contact arm 261a is disposed opposite to the third contact arm 261c, and the second contact arm 261b is vertically connected Between the first contact arm 261a and one end of the third contact arm 261c, the other end of the first contact arm 261a is connected to the spiral portion 263, and the other end of the third contact arm 261c is connected to the fourth contact arm 261d, the fourth contact The arm 261d extends between the shaft coupling drive rod 220 and the second contact piece 28, and the first contact portion 261 is inserted into the spring limit groove 261e in the direction of the second contact arm 261b to limit-fit.

Further, the first contact member 27 and the shaft coupling drive rod 220 are disposed on opposite sides of the elastic member 26, the fourth contact arm 261d of the first contact portion 261 is V-shaped, and one end of the fourth contact arm 261d The side closer to the shaft coupling drive lever 220 is inclined, and the other end of the fourth contact arm 261d is inclined to the side closer to the first contact 27. The first contact portion 261 is provided with a fourth contact arm 261d provided in a V-shape, which can not only effectively reduce the distance between the first contact portion 261 and the first contact 27, and accelerate the speed of conducting the test circuit, but also have higher flexibility , Not only has the characteristics of fast reset speed, but also will not damage the first contact 27 due to hard contact.

Furthermore, the end of the fourth contact arm 261d is provided with a curved contact arm 261f bent toward the first contact 27. The outer side of the curved contact arm 261f is in contact with the first contact 27 to increase the contact area and ensure Able to contact reliably.

As shown in FIGS. 12-16, the middle part of the neutral polar contact 212 is provided with a triangular movable contact guide groove 213, and the housing is provided with a movable contact guide groove 213 and a movable contact guide groove 213 is fitted with the moving contact guide post 214, and one end of the return spring 227 is sleeved in the guide groove 213, and the neutral polar moving contact 212 is provided on both sides of the moving contact guide groove 213 with a protection drive rod shaft hole and a middle The neutral polar contact 215 and the neutral polar contact 215 are in contact with the neutral polar contact 216 on the neutral polar contact 211. The neutral polar contact 212 of this embodiment has the characteristics of small volume, simple structure and easy processing, which can reduce the production cost and the difficulty of assembly.

Further, the neutral polar contact 212 is V-shaped, the middle of the neutral polar contact 212 protrudes toward the side close to the second contact 28, and the other side of the neutral polar contact 212 An opening 217 that avoids the first contact 27 is formed on the side, and the neutral polar contact 215 and the shaft hole for protecting the driving rod are respectively provided at both ends of the V-shaped neutral polar contact 212, A test resistor 251 connected to the first contact 27 is provided on one side of the contact 212, which can avoid interference between parts, further compact the structure of the test mechanism, and reduce the occupied space.

11 and 17 show a second embodiment of the test button 29. The test button 29 includes a button connection portion 291 and a button operation portion 292 and a button push portion 293 respectively provided at both ends of the button connection portion 291. The other end extends out of the housing, the other end of the button pushing portion 293 cooperates with the first contact portion 261, the button connecting portion 291 is connected to one end of the button pushing portion 293 on the top side, and the other end of the button pushing portion 293 on the top side is limited to the housing The first button pushing portion 297 and the second button pushing portion 298 that extend to both sides of the first contact portion 261 are provided on the bottom side of the button pushing portion 293, and the first button pushing portion 297 and the second button pushing A button pushing groove 299 is formed between the portions 298 and the position of the first contact portion 261.

19-27 shows the third embodiment of the circuit breaker created by the present invention. This embodiment differs from the second embodiment described above in that the neutral conductor is not connected between the leakage operating mechanism 22 and the neutral polar contact 212. The neutral conductor of this embodiment is connected between the phase pole operating mechanism 14 of the circuit breaker phase pole 1 and the neutral pole moving contact 212, and the neutral conductor is driven by the phase pole operating mechanism 14 of the circuit breaker phase pole 1. The driving member includes a protective driving rod 225 connected to the neutral polar contact 212 of the neutral moving contact, and a shaft coupling driving rod 220 connected between the protective driving rod 225 and the leakage protection mechanism 22; A contact portion 261 cooperates with the protection driving rod 225 of the neutral drive member.

Specifically, the leakage protection phase pole 2 is provided on one side of the circuit breaker phase pole 1, the leakage protection phase pole 2 includes a zero-sequence current transformer 21, a leakage operation mechanism 22, a leakage release 23, a leakage test mechanism 25, Protection circuit board 211 and neutral contact mechanism;

The phase pole 1 of the circuit breaker includes a phase pole trip unit, a phase pole operating mechanism 14 and a phase pole contact mechanism, and the phase pole trip unit includes an electromagnetic trip mechanism 12 and/or a double gold trip mechanism 13;

The phase pole contact mechanism includes a stationary contact 111 and a moving contact 112 respectively connected to the phase line, and the neutral contact mechanism includes a neutral polar moving contact 212 and a neutral pole static contact 211 respectively connected to the neutral line. The neutral pole contact 212 is connected to the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker through the protection driving rod 225;

The leakage test mechanism 25 includes a test button 29 and a leakage test circuit. The leakage test circuit includes an elastic member 26, a first contact member 27 and a second contact member 28. The elastic member 26 includes a connected first contact portion 261 and a second contact portion 262 , The first contact portion 261 is provided between the first contact 27 and the protection driving rod 225, and the second contact portion 262 is provided between the second contact 28 and the test button 29;

When the phase pole 1 of the circuit breaker is closed, the phase pole operating mechanism 14 pushes the first contact portion 261 of the elastic member 26 to contact the first contact member 27 through the protection driving rod 225, and when the test button 29 is pressed, the test button 29 is pushed The second contact portion 262 of the elastic member 26 is in contact with the second contact member 28, and a loop is formed between the first contact member 27 and the second contact member 28 through the elastic member 26 to conduct the leakage test circuit.

The zero-sequence current transformer 21 of the leakage protection phase pole 2 is set on the neutral line and the leakage test circuit. When the leakage test circuit is turned on, the leakage current of the neutral line is simulated, so that the zero-sequence current transformer 21 senses the leakage Current, zero-sequence current transformer 21 drives the leakage trip unit 23 to unlock the leakage operating mechanism 22, and the leakage operating mechanism 22 drives the phase pole operating mechanism 14 of the circuit breaker phase pole 1 to unlock, and the phase pole operating mechanism 14 unlocks the static contact 111 and the moving contact 112 are separated, disconnecting the connected phase line, and at the same time, the neutral pole moving contact 212 and the neutral pole static contact 211 are separated by the protection driving rod 225, disconnecting the connected neutral line .

The first contact portion 261 of the elastic member 26 and the first contact member 27 form the first test contact of the leakage test circuit, and the second contact portion 262 of the elastic member 26 cooperates with the second contact member 28 to form the leakage test circuit The second test contact, the closing and opening of the second test contact is controlled by the test button 29;

After the circuit breaker is connected to the power supply, when the circuit breaker phase 1 is in the open state, the second test contact is in the open state. At this time, the test button 29 is pressed. After the second test contact is closed, due to the first test contact The point is in a disconnected state, resulting in the leakage test circuit being unable to conduct, and the load side of the circuit breaker cannot form a voltage to ground or a voltage to the protection circuit board 211.

When the circuit breaker phase pole 1 is in the closing state, the first test contact is closed. At this time, the test button 29 is pressed, the first test contact is closed and the leakage test circuit is turned on to simulate the leakage signal, and the circuit breaker phase pole 1 Trip means that the leakage protection function of the leakage protection phase pole 2 has not failed.

In the circuit breaker of this embodiment, the first contact portion of the leakage test circuit is formed by the first contact portion 261 of the elastic member 26 and the first contact member 27, and the second contact portion 262 of the elastic member 26 and the second contact member 28 cooperates with the second test contact forming the leakage test loop. The closing and opening of the second test contact is controlled by the test button 29, and the first test contact is controlled by the phase pole operating mechanism 14 of the phase pole 1 of the circuit breaker. The closing and opening of a test contact is synchronized with the closing and opening actions of the circuit breaker phase pole 1, which not only can effectively avoid the single contact leakage test when the test button 29 is pressed when the circuit breaker phase pole 1 opens The conduction of the loop causes the leakage test loop to generate a voltage to ground or a voltage to the protective circuit board 211, and it has the characteristics of compact structure, small size, and high reliability.

When the circuit breaker handle 31 rotates to the closing position, the phase pole operating mechanism 14 of the circuit breaker phase pole 1 drives the protection drive rod 225 through the shaft coupling drive rod 220 to push the first contact part 261 into contact with the first contact piece 27; When the handle 31 is turned to the open position, the phase pole operating mechanism 14 of the circuit breaker phase pole 1 drives the protection drive rod 225 away from the first contact portion 261 through the shaft coupling drive rod 220.

In this embodiment, on the basis of the double-breakpoint test circuit, the first contact portion 261 is driven by the shaft coupling drive rod 220 of the leakage operating mechanism 22 to be driven by the protective driving rod 225 of the leakage operating mechanism 22 to protect the driving rod The contact area between the 225 and the first contact portion 261 is larger, not only is the cooperation more reliable, but also the assembly difficulty is lower.

Referring to

Embodiments

1 and 2, the circuit breaker created by the present invention includes a circuit breaker phase pole 1 (FIG. 1), a leakage protection pole 2 (FIG. 2), a leakage test mechanism 25 (FIG. 3), and a circuit breaker phase pole 1 respectively Operating mechanism cooperating with the leakage protection pole 2, the circuit breaker phase pole 1 and the leakage protection pole 2 respectively include a phase pole contact mechanism and a neutral conductor contact mechanism connected to the line;

When the circuit breaker is closed, the operating mechanism drives the phase pole contact mechanism and the center line contact mechanism to conduct the line respectively. When the line fails, the operating mechanism unlocks and drives the phase pole contact mechanism and the center line contact mechanism to disconnect the line;

The leakage test mechanism 25 includes a test button 29 and a leakage test circuit. The leakage test circuit includes a second test contact cooperating with the test button 29 and a first test contact cooperating with the operating mechanism. The test button 29 can drive the second The test contacts are closed and separated, and the operating mechanism drives the phase pole contact mechanism and the neutral contact mechanism to turn on and off the line, and can drive the first test contact to close and separate; when the first test contact and the second test When the contacts are closed, the leakage test circuit is turned on and a leakage fault test signal is generated to unlock the operating mechanism; when either the first test contact and the second test contact are separated, the leakage test circuit is opened.

In the circuit breaker created by the present invention, the first test contact and the second test contact of the leakage test circuit are respectively controlled by the operating mechanism and the test button 29. Only when both the first test contact and the second test contact are closed, the leakage test Only when the first test contact and the second test contact are opened, the leakage test circuit will not be conducted, and the load side of the circuit breaker cannot form a voltage to ground or a voltage to the circuit board. , Can reliably protect the load and the circuit board.

The line includes a phase line and a neutral line, the phase pole contact mechanism is connected to the phase line, the neutral line contact mechanism is connected to the neutral line, and the operation mechanism includes a phase pole operation mechanism cooperating with the phase pole contact mechanism 14, and the leakage operating mechanism 22 provided on the side of the phase pole operating mechanism 14 and matched with the neutral contact mechanism, and the phase pole operating mechanism 14 and the leakage operating mechanism 22 cooperate with each other;

When the circuit breaker is closed, the phase pole operating mechanism 14 and the leakage operating mechanism 22 are locked in the energy storage state, respectively, and the phase pole contact mechanism is driven by the phase pole operating mechanism 14 to conduct the phase line, and the neutral line is driven by the leakage operating mechanism 22 The contact mechanism conducts the neutral line, and the phase pole operating mechanism 14 or the leakage operating mechanism 22 corresponding to the line is unlocked and the other is also unlocked, so that the phase pole contact mechanism and the neutral line contact mechanism disconnect the phase line and Neutral.

The first test contact coordinated by the leakage test circuit and the operating mechanism may be controlled by the leakage operating mechanism 22 of the operating mechanism or by the phase pole operating mechanism 14 of the operating mechanism.

The phase pole contact mechanism is connected to the phase pole operating mechanism 14, and the neutral contact mechanism is connected to the phase pole operating mechanism 14 or the leakage operating mechanism 22 through the neutral line drive member, and the first test contact is driven to be closed and separated by the neutral line drive member.

The first test contact is controlled by the leakage operating mechanism 22. The first test is the first embodiment of the circuit breaker created by the present invention. The neutral contact mechanism is connected to the leakage operating mechanism 22 through the neutral drive member, and the first test contact is coordinated with the neutral drive member . The centerline drive part includes a protection drive rod 225 and a shaft coupling drive rod 220, one end of the protection drive rod 225 is connected to the neutral polar contact 212, and the other end of the protection drive rod 225 is coupled to the leakage operating mechanism through the shaft coupling drive rod 220 22 hinged; the first contact portion 261 of the elastic member 26 cooperates with the shaft coupling driving rod 220, the shaft coupling driving rod 220 pushes the first contact portion 261 into contact with the first contact member 27, and the neutral polar contact 212 is One end of the return spring 227 is connected, and the other end of the return spring 227 is connected to the housing.

The first test contact is controlled by the phase pole operating mechanism 14. The first test is the second embodiment of the circuit breaker created by the present invention. The neutral contact mechanism is connected to the phase pole operating mechanism 14 through the neutral line drive. The first test contact is driven by the neutral line. Pieces fit. The centerline drive includes a protection drive rod 225 and a shaft coupling drive rod 220. One end of the protection drive rod 225 is connected to the neutral polar contact 212, and the protection drive rod 225 is coupled to the phase pole operating mechanism 14 through the shaft coupling drive rod 220 Hinged; the first contact portion 261 of the elastic member 26 cooperates with the protection driving rod 225, and the protection driving lever 225 pushes the first contact portion 261 into contact with the first contact member 27, and the neutral polar contact 212 is connected to one end of the return spring 227, The other end of the return spring 227 is connected to the housing.

The two embodiments of the circuit breaker created by the present invention have the following characteristics:

As shown in FIG. 12, the leakage test mechanism 25 includes a first contact 27 and a second contact 28, the elastic member 26 is a torsion spring, and the elastic member 26 includes a first contact portion 261 and a second contact portion The spiral portion 263 between the 262, the spiral portion 263 is sleeved on the spring shaft 260 and is connected to the housing, the first contact portion 261 is provided between the centerline drive member and the first contact member 27, and forms a first contact with the first contact member 27 A test contact, the second contact portion 262 is disposed between the second contact 28 and the test button 29, and forms a second test contact with the second contact 28.

In the circuit breaker created by the present invention, the first contact portion 261 and the second contact portion 262 on the elastic member 26 respectively constitute the first test contact and the second test contact of the leakage test circuit, which can not only ensure the reliability of the leakage test circuit And, by cooperating with the operating mechanism by the first contact portion 261, the operating speed of the operating mechanism can also be increased.

Fig. 26 shows the leakage test circuit when the circuit breaker is being wired, and Fig. 27 shows the leakage test circuit when the circuit breaker is reversely connected; one end of the leakage test circuit is connected to the phase line connected to the phase pole 1 of the circuit breaker, and the leakage test The other end of the loop is connected to the neutral line connected to the leakage protection pole 2. Specifically, the leakage test circuit further includes a test resistor 251 and a reset spring 227. The first contact member 27 is connected to the phase line of the circuit breaker phase pole 1 through the test resistor 251, and one end of the reset spring 227 is connected to the neutral contact mechanism Entering the neutral line, the other end of the return spring 227 is rotatably mounted on the second contact 28. When both the first test contact and the second test contact are closed, the leakage test circuit is conducted between the phase line and the neutral line to generate a leakage fault test signal, which can not only form a leakage in the neutral contact mechanism and the first contact 27 Test the circuit, and the return spring 227 can also increase the contact pressure of the neutral contact mechanism. Of course, the leakage test loop can also adopt other schemes to simulate the generation of leakage current, and all belong to the protection scope of the present invention.

As shown in FIGS. 10 and 21, the operating mechanism is connected to the circuit breaker handle 31. The circuit breaker handle 31 includes a phase pole handle 31a and a leakage protection handle 31b. The phase pole handle 31a and the phase pole operating mechanism 14 of the circuit breaker phase pole 1 Connection, the leakage protection handle 31b is connected to the leakage operation mechanism 22 of the leakage protection pole 2, a pushing block 31c is provided on the leakage protection handle 31b, the pushing block 31c extends to the side where the phase pole handle 31a rotates in the closing direction, the leakage protection When the leakage current of the handle 31b rotates in the direction of opening, the pushing block 31c pushes the phase pole handle 31a to rotate in the direction of opening, which can speed up the action speed of the circuit breaker; when an overload or short circuit current occurs, the phase pole handle 31a opens. Rotate in the direction, but the leakage protection handle 31b does not operate. The position of the phase pole handle 31a and the leakage protection handle 31b can indicate the cause of the failure. If both the phase pole handle 31a and the leakage protection handle 31b are activated, the cause of the failure is overload or short circuit Current; if the phase pole handle 31a acts and the leakage protection handle 31b does not act, it means that the cause of the failure is leakage current.

In the first embodiment described above, the neutral contact mechanism is connected to the leakage protection mechanism 22 of the operating mechanism through the neutral driver. The neutral driver includes a protective drive rod 225 connected to the neutral contact and a protective drive rod 225 The shaft coupling drive rod 220 between the leakage protection mechanism 22; the first contact portion 261 of the elastic member 26 cooperates with the protection driving rod 225 of the neutral drive member or the shaft coupling drive rod 220.

Referring to FIG. 26, in the leakage test circuit when the circuit breaker is being wired, current flows from the terminal 15 at the right end of the circuit breaker phase pole 1 and passes through the static contact 112 of the circuit breaker phase pole 1 and the static contact of the circuit breaker phase pole 1 Head 111, zero-sequence current transformer 21 of leakage protection pole 2, terminal 15 at the left end of circuit breaker phase pole 1, test resistance 251, first contact 27, second test contact, first test contact, elastic piece 26. The return spring 227 and the neutral pole contact 212 flow to the terminal 15 at the right end of the leakage protection pole 2.

As shown in FIG. 27, in the test circuit when the circuit breaker is reversed, current flows from the terminal 15 at the left end of the phase pole 1 of the circuit breaker, through the test resistance 251, the first contact member 27, the elastic member 26, the first test contact, The second test contact, the return spring 227, the neutral pole moving contact 212, the neutral pole static contact 211, and the zero-sequence current transformer 21 flow to the terminal 15 at the left end of the leakage protection pole 2.

As shown in FIGS. 19-20, the structure of the elastic member 26 of this embodiment. The structure of the elastic member 26 in this embodiment is the same as the structure of the elastic member 26 in Embodiment 1, but the difference is that the first contact portion 261 of the elastic member 26 of the present embodiment cooperates with the protection driving lever 225. That is, the first contact member 27 and the protection driving rod 225 are oppositely disposed on both sides of the elastic member 26, the fourth contact arm 261d of the first contact portion 261 is V-shaped, and one end of the fourth contact arm 261d approaches the protection drive One side of the lever 225 is inclined.

Specifically, the elastic member 26 is a torsion spring. The elastic member 26 includes a spiral portion 263 connected between the first contact portion 261 and the second contact portion 262. The spiral portion 263 is sleeved on the spring shaft 260 and connected to the housing. The first contact portion 261 and the second contact portion 262 are both arranged perpendicular to the axis of the spiral portion 263, the first contact portion 261 extends between the protection driving rod 225 and the first contact 27, and the second contact portion 262 extends to the test button 29 and the second contact 28.

Further, the spiral portion 263 is disposed on a side close to the test button 29, and the first contact portion 261 has a U-shaped structure. The first contact portion 261 includes a first contact arm 261a and a third contact arm 261c that are oppositely arranged. And a second contact arm 261b vertically connected between the first contact arm 261a and one end of the third contact arm 261c, the second contact arm 261b is disposed parallel to the axis of the spiral portion 263, and the second contact arm 261b is away from the first contact portion One end of 261a extends toward the swing plane of the protection driving rod 225, the other end of the first contact arm 261a is connected to the spiral portion 263, the third contact arm 261c extends between the protection driving rod 225 and the second contact 28, and the third contact The arm 261c and the protection driving rod 225 are arranged in the same plane.

Further, the other end of the third contact arm 261c away from the second contact arm 261b is connected to a fourth contact arm 261d having a V-shaped structure, and the fourth contact arm 261d extends between the protection driving rod 225 and the second contact 28 , The side of the side where the fourth contact arm 261d is connected to the second contact arm 261b is inclined toward the protection drive rod 225, and the side of the other side of the fourth contact arm 261d is inclined toward the first contact 27 The first contact piece 27 cooperates to form a curved portion that cooperates with the protective driving rod 225 at the connection between the two sides of the fourth contact arm 261d. The protective driving rod 225 pushes the curved portion of the fourth contact arm 261d to make the fourth contact arm The end of 261d away from the second contact arm 261b comes into contact with the first contact piece 27, and the second test contact is closed. The fourth contact arm 261d of the V-shaped structure can not only optimize the layout of the parts, ensure a reliable and safe electrical distance between the first contact 27 and other parts, but also reduce the first contact part 261 and protect the driving rod The distance between 225 is convenient for protecting the driving rod 225 from driving the first contact portion 261 and ensuring the sensitivity of the elastic member 26.

Further, an end of the fourth contact arm 261d that cooperates with the first contact piece 27 is provided with a curved contact arm 261f. The curved contact arm 261f is bent toward the side away from the first contact piece 27, and formed on the outer side of the curved contact arm 261f The arc surface on which the first contact 27 fits. The fourth contact arm 261d comes into contact with the first contact 27 through the curved surface formed on the curved contact arm 261f, the contact area is larger, and the contact is more reliable.

As shown in FIG. 24, a partition 32 is provided between the phase pole 1 of the circuit breaker and the leakage protection pole 2, a spring shaft 260 for mounting the spiral portion 263 of the elastic member 26 is provided on the partition 32, and the partition 32 is located at One side of the spring shaft 260 is provided with a button guide plate 294 that cooperates with one side of the test button 29, and the other side of the button guide plate 294 is provided with a spring limit groove 261e that cooperates with the first contact portion 261 of the elastic member 26, The spiral portion 263 is rotatably sleeved on the spring shaft 260, and the first contact arm 261a, the second contact arm 261b, and the third contact arm 261c of the first contact portion 261 are inserted into the spring limit groove 261e to limit-fit. Preferably, the third contact arm 261c extends to the outside of the spring limiting groove 261e and is connected to the fourth contact portion 261d, which has the characteristics of simple assembly.

As shown in FIG. 24, the neutral polar contact 212 is provided with a triangular movable contact guide groove 213 in the middle, and the housing is provided with a movable contact guide groove 213 which is inserted into the movable contact guide groove 213 to cooperate with the movable contact guide groove 213 The movable contact guide column 214 is provided with a rotatable movable contact limiter 219 on the contact guide column 214, and the neutral polar movable contact 212 is provided with protection on both sides of the movable contact guide groove 213 respectively The driving rod shaft hole and the neutral polar contact 215 protect one end of the driving rod shaft hole and the moving contact limiter 219 to be rotatably sleeved on one end of the contact driving rod 2254 and the other end of the contact driving rod 2254 It is rotatably connected with the protection driving rod 225, the other end of the moving contact limiter 219 and the side of the neutral polar moving contact 212 far away from the neutral polar static contact 211, the one end of the return spring 227 is sleeved on the guide The side wall of the groove 213 is rotatably connected to the neutral polar contact 212. The neutral polar contact 215 and the neutral polar contact 216 on the neutral polar contact 211 are in contact with each other.

When the phase pole operating mechanism 14 of the circuit breaker phase pole 1 is in action, the protection driving rod 225 drives the neutral pole movable contact 212 and the movable contact limiter sleeved on the other end of the contact driving rod 2254 through the contact driving rod 2254 219 action, so that the triangular movable contact guide groove 213 of the neutral polar contact 212 is sleeved on the contact guide post 214 and swings, and at the same time, the movable contact stopper 219 rotates and centers on the contact guide post 214 as the center The swing of the sex pole contact 212 is limited. The neutral polar contact 212 of this embodiment has the characteristics of small volume, simple structure and easy processing, which can reduce the production cost and the difficulty of assembly.

21-23, the structure of the protective driving rod 225 in this embodiment is the same as the structure of the protective driving rod 225 in the first embodiment, one end of the protective driving rod 225 is coupled to the circuit breaker through the shaft coupling driving rod 220 and the circuit breaker The phase pole operating mechanism 14 of 1 is hinged, and the other end of the protection driving rod 225 is hinged with the neutral pole moving contact 212 through the contact driving rod 2254. When the phase pole operating mechanism 14 of the circuit breaker phase pole 1 acts, the protection driving rod 225 drives the neutral polar contact 212 to move.

As shown in FIG. 23, the partition plate 32 is provided with a stop block 2250 for limiting and protecting the driving rod 225. The stop block 2250 cooperates with the end of the protecting driving rod 225 close to the neutral polar contact 212, through the stop Block 2250 prevents the drive rod 225 from being protected against dead spots.

As shown in FIG. 13, the structure of the leakage operation mechanism 22 in this embodiment includes a protection lever 221 pivotally installed in the housing, and protection jumpers pivotally installed on the protection lever 221 and snap-fitted with each other, respectively. Buckle 222 and protection lock 224, protection jumper 222 is connected to leakage protection handle 31b through protection link 223, protection lock 224 is connected to protection lever 221 through protection spring 228, protection spring 228 can drive protection lock 224 and protection jump The buckle 222 has a buckle to maintain energy storage. The leakage trip unit 23 of the leakage protection pole 2 can unlock the protection lock 224 and the protection jumper 222 in the event of a leakage failure. The phase pole operating mechanism 14 of the circuit breaker phase pole 1 is provided with an extension When the unlock lever 229 on the side of the protection lever 221 and the protection lock 224 and the protection jumper 222 are unlocked, the phase pole operating mechanism 14 is unlocked by the unlock lever 229.

25 shows the structure of the phase pole operating mechanism 14 of the circuit breaker phase pole 1 in this embodiment. The phase pole operating mechanism 14 includes a circuit breaker energy storage member, a rocker arm pivotally installed in the housing and connected to the moving contact 112 141. A phase pole support 140 pivotally mounted on the rocker arm 141, and a jumper 142 and a lock catch 143 that are pivotally installed on the phase pole support 140 and snap fit with each other. The phase pole handle 31a is connected, the phase pole support 140 is connected to the housing through the circuit breaker energy storage element, and the phase pole operation mechanism 14 maintains balance when the jumper 142 and the lock catch 143 are snap-fitted with each other. When the pole handle 31a rotates in the closing direction, the phase pole operating mechanism 14 can drive the contact 112 to contact the static contact 111 and store energy for the circuit breaker energy storage element; when the jumper 142 and the lock 143 are released from the snap-fit, The energy storage member releases energy and drives the moving contact 112 to separate from the static contact 111; the lock 143 is provided with an unlocking lever 229 that cooperates with the leakage operating mechanism of the leakage protection pole 2; in this embodiment, the phase pole support 140 The shaft coupling drive rod 220 is connected to the protection driving rod 225 of the leakage protection pole 2, and the lock 143 is pivotally mounted on the phase pole support 140 through the shaft coupling drive rod 220.

The above content is a further detailed description of the creation of the present invention in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the invention is limited to these descriptions. For a person of ordinary skill in the technical field to which the present invention belongs, without deviating from the inventive concept of the present invention, several simple deductions or replacements can be made, which should be regarded as falling within the protection scope of the present invention.

Claims

A circuit breaker includes a case and circuit breaker phase poles (1) and leakage protection poles (2) arranged side by side on the casing, characterized in that the leakage protection pole (2) includes a zero-sequence current transformer (21), leakage operating mechanism (22) and leakage testing mechanism (25), the main circuit of the circuit breaker phase pole (1) passes through the zero sequence current transformer (21); the leakage testing mechanism (25) includes elastic parts (26) ), the test button (29), and the first contact piece (27) and the second contact piece (28) respectively connected to the two ends of the test circuit, and one end of the elastic piece (26) is provided with a leakage operating mechanism (22) or phase The first contact part (261) matched with the pole operation mechanism (14), the other end of the elastic member (26) is provided with a second contact part (262) matched with the test button (29), the leakage operation mechanism (22) or the corresponding The pole operating mechanism (14) can push the first contact part (261) into contact with the first contact (27) when the circuit breaker is closed, and the test button (29) can push the second contact part (262) with the second contact (28) Contact.
The circuit breaker according to claim 1, characterized in that the leakage contact operating mechanism (22) pushes the first contact portion (261) into contact with the first contact (27) when the circuit breaker is closed, the leakage operating mechanism (22) includes a protection lever (221) pivotally installed in the housing, and a protection jumper (222) and a protection lock (224) that are pivotally installed on the protection lever (221) and snap fit with each other, to protect The jumper (222) is hinged to one end of the protection link (223), the other end of the protection link (223) is hinged to the circuit breaker handle (31), and the end of the lock (224) is protected to the leakage release (23) Correspondingly, the first contact piece (27) is provided on one side of the protection lever (221), and the first contact portion (261) of the elastic piece (26) extends to the protection lever (221) and the first contact piece (27). It cooperates with the protection lever (221), and the elastic member (26) drives the protection lever (221) to rotate faster when it is tripped.
The circuit breaker according to claim 2, wherein the elastic member (26) is a torsion spring, and the elastic member (26) includes a connection between the first contact portion (261) and the second contact portion (262) The spiral part (263) is installed on the spring shaft (260) of the housing, and the first contact part (261) and the second contact part (262) are both perpendicular to the axis of the spiral part (263) , The first contact part (261) extends between the protection lever (221) and the first contact (27), and the second contact part (262) extends between the test button (29) and the second contact (28) .
The circuit breaker according to claim 3, characterized in that: the first contact (27) and the second contact (28) are disposed below the leakage operating mechanism (22), and the first contact (27) Set between the second contact piece (28) and the elastic piece (26), the test button (29) is located on the side of the leakage operating mechanism (22) and above the second contact part (262), the second contact part (262) Is longer than the length of the first contact part (261), the end of the second contact part (262) close to the spiral part (263) cooperates with the test button (29), and the other end of the second contact part (262) contacts from the first One side of the piece (27) passes through and extends above the second contact piece (28), and the first contact piece (27) is provided below the first contact piece (27) and the elastic piece (26) Connected test resistor (251).
The circuit breaker according to claim 2, characterized in that: a rear surface of the protection lever (221) is provided with a first pushing boss (2211) extending toward the first contact portion (261) to protect the lever (221) ) Is provided with a second pushing boss (2212) extending laterally, forming a limit for the first contact portion (261) between the second pushing boss (2212) and the first pushing boss (2211) Push the step surface (2213).
The circuit breaker according to claim 3, characterized in that the first contact piece (27) includes a first conductive plate (271) arranged along the axis direction of the spiral portion (263), and the elastic piece (26) is along the axis direction Spacer (32) is placed between the circuit breaker phase pole (1) and the leakage protection pole (2), one end of the first conductive plate (271) is connected to the partition plate (32), and the first conductive plate (271) The other end of the shaft extends along the axis of the spiral part (263) to the side of the protection lever (221) and is suspended;

The first contact (27) further includes a second conductive plate (272), one end of the second conductive plate (272) is opposite to the end of the first conductive plate (271), and one end of the second conductive plate (272) The third conductive plate (273) is connected to the side of the first conductive plate (271) to form a U-shaped first mounting portion, and a first plate connected to the first mounting portion is provided on the partition plate (32) A mounting slot (270), the other end of the second conductive plate (272) extends outward from the first mounting slot (270);

The side of the first conductive plate (271) close to the elastic member (26) is connected to the fourth conductive plate (274), and the third conductive plate (273) and the first conductive plate (271) are away from the elastic member (26) ) One side is connected so that the opening of the U-shaped first mounting part faces the elastic member (26), and the elastic member (26) and the first conductive plate (271) are away from the second conductive plate (272) A test resistor (251) is provided. One end of the fourth conductive plate (274) is vertically connected to the side of the opening of the first mounting portion, and the other end of the fourth conductive plate (274) extends toward the test resistor (251) A connecting hole (275) for connecting the test resistor (251) on the four conductive plates (274).
The circuit breaker according to claim 3, wherein the first contact portion (261) includes a first contact arm (261a), a second contact arm (261b) and a third contact arm (U) connected in a U-shape 261c), the first contact arm (261a) is opposite to the third contact arm (261c), and the second contact arm (261b) is vertically connected between the first contact arm (261a) and one end of the third contact arm (261c) , The other end of the first contact arm (261a) is connected to the spiral part (263), the other end of the third contact arm (261c) is connected to the fourth contact arm (261d), and the fourth contact arm (261d) extends to the test button (29) Between the second contact piece (28), a spring limiting groove (261e) for limiting the first contact arm (261a), the second contact arm (261b) and the third contact arm (261c) is provided in the housing ), the first contact portion (261) is inserted into the spring limiting groove (261e) along the direction of the second contact arm (261b) to limit the engagement.
The circuit breaker according to claim 3, characterized in that a partition plate (32) is provided between the circuit breaker phase pole (1) and the leakage protection pole (2), and a spiral portion is provided on the partition plate (32) (263) A second mounting boss (280) provided in the axis direction, the second contact (28) includes a first conductive wire (281) formed in a U shape and snapped on the second mounting boss (280), One end of a conductive wire (281) is located on the top side of the second mounting boss (280) to cooperate with the second contact portion (262), and the other end of the first conductive wire (281) is located on the second mounting boss (280) The bottom side is connected to the main circuit of the circuit breaker phase pole (1) through the second conductive wire (282).
The circuit breaker according to claim 4, wherein the test button (29) includes a button connection part (291), a button operation part (292) and a button pushing part respectively provided at both ends of the button connection part (291) (293), the other end of the button operation part (292) extends out of the housing, the other end of the button pushing part (293) cooperates with the second contact part (262), and the button pushing part (293) is spaced from the partition plate (32) Provided, a button guide plate (294) extending toward the button pushing portion (293) is provided on the partition plate (32), and a button guide slidingly engaged with the button guide plate (294) is provided on the side of the button pushing portion (293) Groove (295); the button connecting part (291) is connected to one end of the top side of the button pushing part (293), and the other end of the top side of the button pushing part (293) is matched with the limit of the housing, and the button pushing part (293) The bottom side is provided with a first button pushing portion (297) and a second button pushing portion (298) that extend to both sides of the second contact portion (262) respectively. On the first button pushing portion (297) and the second button pushing portion (298) A button pushing groove (299) that is limited to cooperate with the second contact portion (262) is formed; a side of the button guide plate (294) is provided with a contact guide groove (296) that cooperates with the first contact portion (261) ).
The circuit breaker according to claim 5, wherein the protection lever (221) is provided with a protection lever shaft hole (2210) which is rotatably connected to the housing, and the protection lever (221) is provided with a center hole There is a lock shaft hole (2218) connected with the lock catch (224), and correspondingly provided with a jumper shaft (2217) and a protection lever shaft (2216) on both sides of the lock shaft hole (2218), the jumper shaft (2217) is connected with the jumper (222), and the protection lever shaft (2216) is connected with the housing; the back of the protection lever (221) is provided with a first lever boss (2214) on the other side of the protection lever shaft hole (2210) ), the back side of the protection lever (221) is provided with a first pushing boss (2211) extending toward the first contact portion (261) side at the top corner of the side of the protection lever shaft hole (2210). A second lever boss (2215) is provided on the other side of the shaft hole (2210) relative to the first pushing boss (2211), on the side of the first lever boss (2214) away from the protection lever shaft hole (2210) A first lever groove (2215) is provided.
The circuit breaker according to claim 1, characterized in that when the circuit breaker is closed, the first contact portion (261) is pushed by the phase pole operating mechanism (14) to contact the first contact piece (27), the circuit breaker The phase pole (1) includes a phase pole operating mechanism (14), and oppositely arranged static contacts (111) and a moving contact (112), the moving contact (112) is connected to the phase pole operating mechanism (14); The leakage protection pole (2) includes a neutral pole static contact (211) and a neutral pole moving contact (212) which are relatively arranged in the housing, and the phase pole operating mechanism (14) passes through the neutral pole when the circuit breaker is closed The centerline drive connected to the moving contact 212 pushes the first contact portion (261) into contact with the first contact (27).
The circuit breaker according to claim 11, wherein the neutral drive member includes a protection drive rod (225) and a shaft-coupling drive rod (220), and one end of the protection drive rod (225) is protected from the neutral polar contact (212) connection, the protection driving rod (225) is hinged to the phase pole operating mechanism (14) through the shaft coupling driving rod (220); the first contact part (261) of the elastic member (26) and the protection driving rod (225) In cooperation, the protection driving rod (225) pushes the first contact part (261) into contact with the first contact piece (27), the neutral polar contact (212) is connected to one end of the return spring (227), and the return spring (227) One end is connected with the shell.
The circuit breaker according to claim 12, characterized in that the elastic member (26) is a torsion spring, and the elastic member (26) includes a connection between the first contact portion (261) and the second contact portion (262) The spiral part (263), the spiral part (263) is sleeved on the spring shaft (260) and is connected with the housing, and the first contact part (261) and the second contact part (262) are perpendicular to the axis of the spiral part (263) The second contact piece (28) is arranged on the side of the neutral polar contact (212) close to the neutral polar contact (211), and the first contact piece (27) and the elastic piece (26) are arranged On the side of the neutral polar contact (212) away from the neutral polar contact (211), the neutral polar contact (212) is connected to the second contact (28) through the return spring (227), the first The second contact part (262) passes through the side of the neutral polar contact (212) and cooperates with the second contact piece (28), the first contact piece (27) and the test arranged under the first contact piece (27) The resistor (251) is connected.
The circuit breaker according to claim 13, characterized in that the first contact piece (27) and the shaft coupling drive rod (220) are arranged on opposite sides of the elastic piece (26), and the first contact part (261) ) Is provided with a V-shaped fourth contact arm (261d), one end of the fourth contact arm (261d) is inclined toward the side close to the shaft coupling drive rod (220), and the other end of the fourth contact arm (261d) Incline to the side close to the first contact (27).
The circuit breaker according to claim 11, wherein the test button (29) includes a button connection part (291), a button operation part (292) and a button pushing part respectively provided at both ends of the button connection part (291) (293), the other end of the button operation part (292) extends out of the housing, the other end of the button pushing part (293) cooperates with the second contact part (262), the button connecting part (291) and the button pushing part (293) One end of the top side is connected, and the other end of the top side of the button pushing part (293) is matched with the limit of the housing. On the bottom side of the button pushing part (293), there are provided first and second extension parts that extend to both sides of the first contact part (261). A button pushing part (297) and a second button pushing part (298), a limit fit between the first button pushing part (297) and the second button pushing part (298) and the second contact part (262) is formed The button pushes the slot (299).
The circuit breaker according to claim 11, characterized in that the leakage operating mechanism (22) includes a protection lever (221) pivotally mounted in the housing, and each is pivotally mounted on the protection lever (221) and mutually The protection jumper (222) and the protection lock (224) of the snap-fit, the protection jumper (222) is connected to the leakage protection handle (31b) through the protection link (223), and the protection lock (224) passes through the protection spring ( 228) Connected to the protection lever (221), the protection spring (228) can drive the protection lock (224) and the protection jumper (222) to keep energy storage, and the leakage protection (23) of the leakage protection pole (2) The protection lock (224) and the protection jumper (222) can be unlocked when a leakage fault occurs. The phase pole operating mechanism (14) of the phase pole (1) of the circuit breaker is provided with an unlock extending to the side of the protection lever (221) When the lever (229), the protection lock (224) and the protection jumper (222) are unlocked, the phase pole operating mechanism (14) is unlocked by the unlock lever (229).
The circuit breaker according to claim 11, wherein the phase pole operating mechanism (14) includes a circuit breaker energy storage member, a rocker arm (141) pivotally installed in the housing and connected to the moving contact (112) , A phase pole support (140) pivotally mounted on the rocker arm (141), and a jumper (142) and a lock clasp (143) pivotally installed on the phase pole support (140) , The jumper (142) is connected to the phase pole handle (31a) through the connecting rod (144), the phase pole support (140) is connected to the housing through the circuit breaker energy storage element, and the phase pole operating mechanism (14) is in the jumper (14) 142) and the latch (143) are snap-fitted with each other, the phase pole operating mechanism (14) maintains balance, and the phase pole handle (31a) rotates in the closing direction to drive the contact (112) through the phase pole operating mechanism (14) ) It is in contact with the static contact (111) and stores energy for the energy storage part of the circuit breaker; when the tripping buckle (142) and the locking buckle (143) are released from the snap fit, the energy storage part releases energy and drives the moving contact (112) Separated from the static contact (111); an unlocking lever (229) cooperating with the leakage operating mechanism of the leakage protection pole (2) is provided on the lock catch (143).
The circuit breaker according to claim 17, characterized in that the phase pole support (140) is connected to the protection drive rod (225) of the leakage protection pole (2) through a shaft-machine coupling drive rod (220).
The circuit breaker according to claim 13, wherein the spiral portion (263) is disposed on a side close to the test button (29), and the first contact portion (261) has a U-shaped structure, and the first contact The portion (261) includes a first contact arm (261a), a third contact arm (261c), and a second electrode vertically connected between one end of the first contact arm (261a) and the third contact arm (261c) The contact arm (261b), the second contact arm (261b) is arranged parallel to the axis of the spiral portion (263), and the end of the second contact arm (261b) away from the first contact portion (261a) swings toward the protection driving rod (225) plane Extending, the other end of the first contact arm (261a) is connected to the spiral part (263), the third contact arm (261c) extends between the protection driving rod (225) and the second contact (28), and the third contact The arm (261c) and the protection driving rod (225) are arranged in the same plane.
The circuit breaker according to claim 19, wherein the other end of the third contact arm (261c) away from the second contact arm (261b) is connected to a fourth contact arm (261d) having a V-shaped structure, The four contact arms (261d) extend between the protective driving rod (225) and the second contact piece (28), and the side of the side where the fourth contact arm (261d) connects with the second contact arm (261b) approaches the protective drive The direction of the lever (225) is inclined, and the side of the other side of the fourth contact arm (261d) is inclined in a direction closer to the first contact (27) to cooperate with the first contact (27), and the fourth contact arm (261d) ) The joints on both sides of the two sides form a curved portion that cooperates with the protective driving rod (225), and the protective driving rod (225) moves the fourth contact arm (261d) away from the second by pushing the curved portion of the fourth contact arm (261d) One end of the contact arm (261b) and the first contact piece (27) realize the closing of the second test contact; the end of the fourth contact arm (261d) cooperating with the first contact piece (27) is provided with a curved contact arm (261f), the curved contact arm (261f) is bent to a side away from the first contact (27), and an arc surface that cooperates with the first contact (27) is formed outside the curved contact arm (261f).
The circuit breaker according to claim 17, wherein the circuit breaker handle (31) includes a phase pole handle (31a) and a leakage protection handle (31b), the phase pole handle (31a) and the circuit breaker phase pole (1 ) Is connected to the phase pole operation mechanism (14), the leakage protection handle (31b) is connected to the leakage operation mechanism (22) of the leakage protection pole (2), and a pushing block (31c) is provided on the leakage protection handle (31b) to push The block (31c) extends to the side where the phase pole handle (31a) rotates in the closing direction, and the leakage protection handle (31b) pushes the phase pole handle (31a) by pushing the block (31c) when leakage current rotates in the opening direction ) Turn to the direction of opening; when overload or short-circuit current occurs, the phase pole handle (31a) rotates to the direction of opening, but the leakage protection handle (31b) does not operate.