WO2023116146A1

WO2023116146A1 - Residual current operated circuit-breaker with width of 18 mm

Info

Publication number: WO2023116146A1
Application number: PCT/CN2022/125618
Authority: WO
Inventors: 单小龙; 葛伟骏; 雷广
Original assignee: 上海正泰智能科技有限公司
Priority date: 2021-12-23
Filing date: 2022-10-17
Publication date: 2023-06-29
Also published as: AU2022422516A1; EP4318531A1; KR20240121659A; CN116344273A

Abstract

The present invention relates to the low-voltage electrical field, and specifically relates to a residual current operated circuit-breaker with a width of 18 mm. On a projection perpendicular to a widthwise direction of a circuit-breaker housing, the circuit-breaker housing comprises first to fifth regions. The residual current operated circuit-breaker further comprises an operation mechanism and a leakage testing mechanism, which are arranged in the first region; a short-circuit instantaneous tripping mechanism, an L-pole contact system, and an N-pole contact system, which are arranged in the second region; an arc extinguishing system, which is arranged in the third region; an overload tripping mechanism, which comprises a bimetallic strip and is arranged in the fourth region; and a zero-sequence current transformer and a flux trip device, which are arranged in the fifth region. The L-pole contact system and the N-pole contact system are arranged side by side in the widthwise direction of the circuit-breaker housing. The zero-sequence current transformer and the flux trip device are arranged side by side in a lengthwise direction of the circuit-breaker housing and are respectively arranged opposite the second region and the third region. The residual current operated circuit-breaker has a rational internal layout and a compact structure.

Description

18mm width residual current operated circuit breaker

technical field

The invention relates to the low-voltage electric field, in particular to a residual current operated circuit breaker.

Background technique

The residual current circuit breaker whose action function has nothing to do with the power supply voltage uses the residual current to directly drive the magnetic flux release to act, and then pushes the tripping mechanism of the circuit breaker to trip to disconnect the circuit. The product structure needs to set a zero-sequence current that induces residual current Transformer and flux release directly driven by residual current, these two parts take up a lot of space, it is difficult to realize the miniaturization of the product, the existing miniature circuit breaker is usually 18mm one module, with zero sequence Residual current operated circuit breakers of current transformers and flux releases usually require one and a half modules of 27mm or two modules of 36mm, and cannot be installed in the space of 18mm modules.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide a residual current operated circuit breaker with a width of 18mm, which has a reasonable internal layout and a compact structure.

To achieve the above object, the present invention adopts the following technical solutions:

A residual current operated circuit breaker with a width of 18mm, which includes a circuit breaker housing, on a projection perpendicular to the width direction of the circuit breaker housing, the circuit breaker housing includes a first area, a second area, a The third area, the fourth area and the fifth area; the residual current operated circuit breaker with a width of 18mm also includes an operating mechanism and a leakage test mechanism arranged in the first area, and a short-circuit instantaneous tripping mechanism arranged in the second area , L-pole contact system and N-pole contact system, the arc extinguishing system set in the third area, the overload release mechanism including bimetallic strips set in the fourth area, and the zero switch set in the fifth area A sequence current transformer and a magnetic flux release; the L pole contact system and the N pole contact system are arranged side by side along the width direction of the circuit breaker housing; the zero sequence current transformer and the magnetic flux release are arranged along the circuit breaker The length direction of the device housing is arranged side by side and opposite to the second area and the third area respectively.

Preferably, the first area, the second area and the third area are arranged in sequence along the length direction of the circuit breaker housing and are located at one end in the height direction of the circuit breaker housing, and the fourth area and the fifth area are located at one end of the circuit breaker housing The other end in the height direction of the body; the second area and the third area, and the fifth area are arranged side by side along the height direction of the circuit breaker housing; the first area and the second area, and the fourth area are arranged along the circuit breaker The height direction of the device housing is arranged side by side; a part of the fourth area is located between the second area and the fifth area; the zero-sequence current transformer and the magnetic flux release are respectively opposite to the second area and the third area set up.

Preferably, the fourth area is an L-shaped structure, one end of which is located between the second area and the fifth area, and the other end and the fifth area are arranged side by side along the length direction of the circuit breaker housing.

Preferably, the operating mechanism includes a handle, a jumper, a locker and a lever respectively rotated on the circuit breaker housing, as well as a first connecting rod and a second connecting rod; one end of the first connecting rod is connected to the handle Hinged, the other end is hinged with one end of the second connecting rod and slidably inserted into the waist-shaped hole of the jumper, the other end of the second connecting rod is hinged with the lever, and the lever is respectively connected to the N pole of the N pole contact system. The contact is driven and connected to the L-pole moving contact of the L-pole contact system, the jumper and the lock are snap-fitted, and the lock is driven by the short-circuit instantaneous release mechanism, overload release mechanism or magnetic flux release And rotate to make it release the hasp fit with the jumper, so that the operating mechanism is released.

Preferably, the residual current operated circuit breaker further includes a first partition, a short-circuit instantaneous release mechanism, an L-pole contact system and an arc extinguishing system, and the N-pole contact system is respectively located on both sides of the first partition;

The lever includes a lever partition, the L-pole movable contact and the N-pole movable contact are respectively located on both sides of the lever partition, and the lever partition overlaps with the first partition, and the first partition at least partially extends into the L-pole movable contact and the N-pole movable contact. Between the N-pole movable contacts; when the L-pole movable contacts and the N-pole movable contacts move together with the lever, the lever partition and the first partition always keep at least a partial overlap.

Preferably, the short-circuit instantaneous release mechanism directly drives and cooperates with the lock catch; the operating mechanism also includes a transmission rod, one end of the drive rod is hinged with the lock catch, and the other end is respectively driven by the bimetal and the magnetic flux release. Cooperate.

Preferably, one end of the locking member is rotatably arranged on the circuit breaker housing, and the other end is provided with a driven surface and a knocking part. The L-pole moving contact of the system is driven and matched; when the driven surface is struck by the short-circuit instantaneous release mechanism to make the lock piece rotate, the knocking part hits the L-pole moving contact so that it is in contact with the L-pole of the L-pole contact system. Extremely static contact breaking.

Preferably, the leakage test mechanism includes a test button and a switch torsion spring and a matching conductive structure sequentially connected in series between the L pole circuit and the N pole circuit of the residual current operated circuit breaker, the test button, the switch torsion spring and the matching conductive structure are all Located on one side of the handle of the operating mechanism, the test button and the handle are arranged side by side along the height direction of the circuit breaker housing.

Preferably, the two ends of the switch torsion spring are respectively a switch arm and a connecting arm, the switch arm is driven and matched with the test button, the connecting arm is fixedly arranged, the matching conductive structure includes a matching torsion spring, and the two ends of the matching torsion spring are respectively a matching arm and a connecting arm. The fixed arm is driven and matched with the operating mechanism, and the fixed arm is fixedly set; the short-circuit instantaneous release mechanism is an electromagnetic release, including a yoke and a coil assembly, and the yoke is electrically connected to the L-pole contact system; the open circuit When the circuit breaker is in the opening state, the matching arm is disconnected from the yoke; when the circuit breaker is switched from the opening state to the closing state, the operating mechanism drives the matching arm to conduct with the yoke; the switching arm is kept in contact with the matching conductive structure. In the normally open state, press the test button to make it drive the switch arm to make contact with the matching conductive structure.

Preferably, the residual current operated circuit breaker with a width of 18mm further includes an anti-misoperation device arranged in the first area, and the anti-misoperation device includes a limiting structure capable of switching between the first position and the second position; When the handle of the residual current operated circuit breaker is at the opening position, the limit cooperation between the handle and the limit structure will limit the limit structure to the first position, and the limit structure will prevent the test button of the leakage test mechanism from being pressed to the test position; When the circuit breaker is in the closed state, press the test button to the test position with external force, and the limit structure moves to the second position, preventing the handle from turning to the open position.

Preferably, after the test button is released and reset, the limit structure is driven by the handle to reset from the second position to the first position, and the handle rotates to the opening position.

Preferably, the two ends of the bimetal sheet are double-gold mounting ends and double-gold fitting ends respectively, the double-gold mounting ends are opposite to the first region, and the double-gold fitting ends are located between the second region and the fifth region and are connected to the operation Mechanism-driven fit.

Preferably, the overload tripping mechanism also includes an adjustment structure, the adjustment structure includes an adjustment screw, an adjustment nut and an insulating adjustment knob, the adjustment nut is fixedly arranged, the adjustment screw is threaded with the adjustment nut, one end is matched with the bimetal, and the other end is matched with the The insulation adjustment knob is matched and the adjustment screw rotates synchronously with the insulation adjustment knob.

Preferably, the residual current operated circuit breaker with a width of 18mm further includes a second partition and a double gold support arranged in the fourth area, the double gold installation end is arranged on the double gold support, and the double gold support is fixed on Between the second partition and the circuit breaker housing, the adjusting nut is fixed on the second partition, and the insulation adjusting knob is arranged on the second partition to rotate around its own axis.

Preferably, the first separator includes an air channel arranged on one side thereof, the air channel is a labyrinth-shaped air channel, including at least two reversely bent channels, one end of the air channel is matched with the N-pole contact system, and the other end is At least one exhaust port is provided.

Preferably, the residual current operated circuit breaker with a width of 18mm further includes a circuit board arranged in the fifth area, and the circuit board, the magnetic flux release and the zero-sequence current transformer are arranged side by side in sequence along the length direction of the circuit breaker housing .

Preferably, the residual current operated circuit breaker with a width of 18 mm further includes a shield cover and an L pole power-in terminal board arranged in the fifth area, and an arc strike plate for the L pole arranged in the third area.

Preferably, the L-pole arc-starting board and the L-pole outlet terminal board are respectively located on both sides of the magnetic flux release, and the L-pole arc-starting board is electrically connected to the L-pole power-in terminal board through a first wire; the shielding cover includes The top plate of the shielding case and the back plate of the shielding case, the top plate of the shielding case is located between the zero-sequence current transformer and the magnetic flux release, and the back plate of the shielding case is located between the first wire and the magnetic flux release.

Preferably, the residual current operated circuit breaker with a width of 18mm also includes a magnetic flux release reset structure, and the magnetic flux release reset structure includes a lever and a push rod respectively rotated on the circuit breaker housing, and a return spring .

Preferably, when the magnetic flux release operates, the ejector rod of the magnetic flux release is ejected to drive the push rod to rotate, and the push rod drives the operating mechanism to trip; After tripping and opening, the return spring drives the lever to rotate, and at the same time the lever drives the push rod to rotate in the direction of resetting the ejector rod; when the residual current operated circuit breaker is closed, the operating mechanism drives the lever to rotate to make it The push rod separates.

The residual current operated circuit breaker of the present invention optimizes the spatial distribution of each component, makes the internal layout reasonable and compact, is conducive to the miniaturization of the product, and realizes the operating function and power supply in a limited space (such as a space with a width of 18mm). Voltage-independent residual current circuit breaker function.

In addition, the operating mechanism is a cam-five-bar linkage mechanism, the overall structure is compact, and the space occupied by the movement of the overall parts in different states is small, which is conducive to further saving the internal space of the circuit breaker housing; and the jumper The tripping mechanism and operating mechanism composed of parts and locking parts are separate and independent mechanisms. When the operating mechanism performs normal closing or opening operations, the tripping mechanism is in a static state, thus ensuring the overall reliability of the operating mechanism.

Description of drawings

Fig. 1 is a schematic diagram of the projection structure of the residual current operated circuit breaker of the present invention;

Fig. 2 is a schematic diagram of the explosive structure of the residual current operated circuit breaker of the present invention;

Fig. 3a is a partial structural schematic diagram of the residual current operated circuit breaker in the closed state of the present invention, showing the anti-mistouch device and the leakage test mechanism;

Fig. 3b is a structural schematic diagram of the anti-mistouch device after the residual current operated circuit breaker trips and opens in the present invention, the limit structure is in the second position, and the handle is between the opening position and the closing position;

Fig. 4a is a schematic diagram of the cooperative structure of the overload release mechanism, the magnetic flux release, the reset structure of the magnetic flux release and the operating mechanism when the residual current operated circuit breaker of the present invention is in the opening state;

Fig. 4b is a schematic diagram of the cooperative structure of the magnetic flux release and the reset structure of the magnetic flux release when the residual current operated circuit breaker of the present invention is in the closing state;

Fig. 5a is a schematic diagram of the cooperative structure of the separator and the lever of the present invention;

Fig. 5 b is a schematic diagram of the cooperative structure of the separator and the lever of the present invention, showing the N pole contact system and the air passage of the separator;

Fig. 6 is a schematic structural view of the contact system of the present invention;

Fig. 7 is a schematic structural view of the magnetic flux release, the shielding cover, the circuit board, the zero-sequence current transformer, and the L-pole arc striking plate of the present invention;

Fig. 8 is a schematic structural view of the locking member of the present invention.

Detailed ways

The specific implementation of the residual current operated circuit breaker of the present invention will be further described below with reference to the embodiments given in the accompanying drawings 1-8. The residual current operated circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in Figure 1, the residual current operated circuit breaker with a width of 18mm of the present invention includes a circuit breaker housing 1, and on the projection perpendicular to the width direction of the circuit breaker housing 1, the circuit breaker housing 1 includes a The first area A1, the second area A2, the third area A3, the fourth area A4 and the fifth area A5; the residual current operated circuit breaker with a width of 18 mm also includes an operating mechanism 5 and Leakage test mechanism, short-circuit instantaneous release mechanism 3, L-pole contact system and N-pole contact system set in the second area A2, arc extinguishing system 4 set in the third area A3, set in the fourth area A4 The overload release mechanism including the bimetal strip 13, and the zero-sequence current transformer 27 and the magnetic flux release 24 arranged in the fifth area A5; the L-pole contact system and the N-pole contact system are along the The width direction of the circuit breaker housing 1 is arranged side by side; the zero-sequence current transformer 27 and the magnetic flux release 24 are arranged side by side along the length direction of the circuit breaker housing 1 . Further, the first area A1, the second area A2 and the third area A3 are arranged in sequence along the length direction of the circuit breaker housing 1 and are located at one end in the height direction of the circuit breaker housing 1, and the fourth area A4 and the third area The fifth area A5 is located at the other end in the height direction of the circuit breaker housing 1; the second area A2 and the third area A3 are arranged side by side with the fifth area A5 along the height direction of the circuit breaker housing 1; the first The area A1 and the second area A2 are arranged side by side with the fourth area A4 along the height direction of the circuit breaker housing 1; a part of the fourth area A4 is located between the second area A2 and the fifth area A5; the zero sequence The current transformer 27 and the magnetic flux release 24 are arranged opposite to the second area A2 and the third area A3 respectively. Further, the fourth area A4 is an L-shaped structure, one end of which is located between the second area A2 and the fifth area A5 , and the other end and the fifth area A5 are arranged side by side along the length direction of the circuit breaker housing 1 .

The residual current operated circuit breaker with a width of 18mm of the present invention optimizes the spatial distribution of each component, makes the internal layout reasonable and compact, is conducive to the miniaturization of the product, and realizes the action in a limited space (such as the space after 18mm) Residual current circuit breaker function independent of mains voltage.

The left-right direction in FIG. 1 is the height direction of the circuit breaker case 1 , the inside-outside direction of the paper in FIG. 1 is the width direction of the circuit breaker case 1 , and the up-down direction in FIG. 1 is the length direction of the circuit breaker case 1 . It should be pointed out that the "height direction", "length direction" and "width direction" are used to indicate the three-dimensional space arrangement of the circuit breaker housing 1, so as to facilitate a better understanding of the internal structural layout of the residual current operated circuit breaker, It does not limit the actual use direction or orientation of the residual current operated circuit breaker of the present invention.

Specifically, as shown in Figure 1, in the residual current operated circuit breaker of the present invention, the first area A1, the second area A2 and the third area A3 are arranged in sequence from top to bottom and are located at the left end of the circuit breaker housing 1, the second The fourth area A4 and the fifth area A5 are set up and down and are located at the right end of the circuit breaker housing 1; the first area A1 and the second area A2 are set opposite to the fourth area A4; the second area A2 and the third area A3, set opposite to the fifth area A5; a part of the fourth area A4 is located between the second area A2 and the fifth area A5; the zero-sequence current transformer 27 and the magnetic flux release 24 are arranged side by side up and down In the fifth area A5; the operating mechanism 5 and the leakage test mechanism are set in the first area A1, the overload tripping mechanism is set in the fourth area A4, the short-circuit instantaneous tripping mechanism 3 is set in the second area A2, and the arc extinguishing system 4 Set in the third area A3, the short-circuit instantaneous tripping mechanism 3 is an electromagnetic tripping mechanism, arranged side by side with the arc extinguishing system 4 (that is, the short-circuit instantaneous tripping mechanism 3 and the arc extinguishing system 4 are arranged along the length direction of the circuit breaker) arranged side by side); the operating mechanism 5 part will extend to the second area A2, between the short-circuit instantaneous release mechanism 3 and the overload release mechanism, and the L-pole contact system is located between the short-circuit instantaneous release mechanism 3 and the zero-circuit instantaneous release mechanism. Between the sequence current transformers 27, of course, the part where the L pole contact system and the N pole contact system are provided with contacts will extend to the third area A3 to cooperate with the arc extinguishing system 4.

The circuit breaker housing 1 is in an approximately convex shape, including a main body and a raised portion on the upper side of the main body. Most of the first area A1 and the fourth area A4 are located in the raised portion. The second One end of the bimetal strip 13 of the overload release mechanism of the four-area A4 extends between the second area A2 and the fifth area A5. The second area A2, the third area A3, and the fifth area A5 are located in the main body, and a set of connection terminals are arranged on both sides of the main body, and the short-circuit instantaneous release mechanism 3 and arc extinguishing mechanism are arranged between the two sets of connection terminals. System 4, zero-sequence current transformer 27 and magnetic flux release 24, short-circuit instantaneous release mechanism 3 and zero-sequence current transformer 27 are arranged at intervals along the height direction of the circuit breaker housing 1, and the L pole contact system and N The pole contact system is located between the short-circuit instantaneous release mechanism 3 and the zero-sequence current transformer 27, and part of the operating mechanism extends between the short-circuit instantaneous release mechanism 3 and the zero-sequence current transformer 27, the arc extinguishing system 4 and the magnetic flux The trippers 24 are arranged opposite to each other along the height direction of the circuit breaker housing 1 , and at least part of the L-pole contact system extends between the arc extinguishing system 4 and the magnetic flux tripper 24 .

As shown in Figures 1 and 2, the operating mechanism 5 includes a handle 5-0, a jumper 5-3, a locker 5-4 and a lever 5-5 that are respectively rotated on the circuit breaker housing 1, and The first connecting rod 5-1 and the second connecting rod 5-2; one end of the first connecting rod 5-1 is hinged to the handle 5-0, and the other end is hinged to one end of the second connecting rod 5-2 and is slidably inserted in the In the waist-shaped hole of the jumper 5-3, the other end of the second connecting rod 5-2 is hinged with the lever 5-5, and the lever 5-5 is respectively connected with the N pole moving contact 38 and the N pole contact system of the N pole contact system. The L-pole movable contact 19 of the L-pole contact system is driven and connected to synchronously drive the N-pole contact system and the L-pole contact system to close or disconnect, and the jumper 5-3 and the lock 5-4 are snap-fitted, The locking part 5-4 is driven by the short-circuit instantaneous tripping mechanism 3, the overload tripping mechanism or the magnetic flux tripper 24 and rotates to release the snap fit with the jumper part 5-3, so that the operating mechanism is tripped. Further, the locking member 5-4 and the lever 5-6 are arranged coaxially. The operating mechanism is a cam-five-bar linkage mechanism, the overall structure is compact, and the space occupied by the movement of the overall parts in different states is small, which is conducive to further saving the internal space of the circuit breaker housing; and the jumper and The tripping mechanism and the operating mechanism composed of locking parts are separate and independent mechanisms. When the operating mechanism performs normal closing or opening operations, the tripping mechanism is in a static state, thereby ensuring the overall reliability of the operating mechanism. Further, one end of the jumper 5-3 is rotated and arranged on the circuit breaker housing 1, and the other end is snap-fitted with the locker 5-4, and the waist hole of the jumper is located in the middle of the jumper 5-3; When the operating mechanism 5 is in the closing state, the torque exerted by the end of the first connecting rod 5-1 inserted in the waist hole of the jumper to the jumper 5-3 is the same as that of the locker 5-4 for the jumper. The moments applied by the parts 5-3 are equal in size and opposite in direction, and the force arm of the locking part 5-4 exerting force on the jumper 5-3 is greater than that of the first connecting rod 5-1 inserted in the waist hole of the jumper One end of the inner end exerts a force arm on the jumper 5-3, so it is beneficial to reduce the tripping force of the operating mechanism and ensures that the magnetic flux tripper 24 can reliably push the tripping mechanism to trip.

As shown in Figures 1-2, 4a, 5a-5b, the 18mm wide residual current operated circuit breaker of the present invention also includes a first partition 2, a short-circuit instantaneous release mechanism 3, an L pole contact system and an arc extinguishing system 4, The N pole contact system is located on both sides of the first separator 2 respectively.

As shown in Figures 1-2, 4a, 5a-5b, the lever 5-5 includes a lever partition 5-50, and the L-pole moving contact 19 and the N-pole moving contact 38 are respectively located on both sides of the lever partition 5-50, And the lever partition 5-50 is misplaced and overlapped with the first partition plate 2, and the first partition plate 2 at least partially extends between the L pole moving contact 19 and the N pole moving contact 38; the L pole moving contact 19 and the N pole moving contact When the pole moving contact 38 moves together with the lever 5-5, the lever partition 5-50 and the first partition 2 always keep at least a partial overlap, and the lever partition 5-50 cooperates with the first partition 2 to improve the residual current action The insulation gap and creepage distance between the L pole circuit and the N pole circuit of the circuit breaker. Further, the lever partition 5-50 is characterized by a thin plate. The handle 5-0, jumper 5-3, locker 5-4 and lever 5-5, as well as the first connecting rod 5-1 and the second connecting rod 5-2 are integrally located in the first area A1 Inside, the latch 5-4 partially extends into the second area A2 to cooperate with the short-circuit instantaneous release mechanism 3, the overload release mechanism and the magnetic flux release 24, and the lever 5-5 partially extends to the second area A2 for assembly The N pole moving contact 38 of the N pole contact system and the L pole moving contact 19 of the L pole contact system.

As shown in Figure 2, the first partition 2 includes a partition main body and a partition expansion part. The side edge of the partition main body and the lever partition 5-50 are offset and overlapped as the side edge of the main body, and the partition expansion part is raised. It is arranged on the side edge of the main body and extends toward the lever 5-5. The expansion part of the partition overlaps with the lever partition 5-50 and extends between the two moving contacts; the lever 5-5 includes And for the two lever shafts 5-51 connected with the movable contact, the two lever shafts 5-51 are all located in the right-angle gap surrounded by the expansion part of the partition and the side edge of the main body.

As shown in Figure 8, one end of the locking member 5-4 is rotatably arranged on the circuit breaker housing 1, and the other end is provided with a driven surface 61 and a knocking part 62, and the driven surface 61 is connected with the short-circuit instantaneous release mechanism 3 Driving cooperation, the knocking part 62 is driven and matched with the L pole moving contact 19; when the driven surface 61 is hit by the short-circuit instantaneous release mechanism 3 to make the lock 5-4 rotate, the knocking part 62 hits the L pole moving contact 19 to make it disconnect from the L pole static contact 3-2 of the L pole contact system, so that the L pole moving contact 19 and the L and static contact 3-2 are opened by a certain distance before the operating mechanism trips and resets. Accelerate the arc movement, thereby improving the current limiting ability of short-circuit current. Further, the knocking parts 62 behind the driven surface 61 are respectively located on both sides of the locking member 5-4 in the width direction.

As shown in Figure 1-2, the short-circuit instantaneous release mechanism 3 directly drives and cooperates with the lock member 5-4; the operating mechanism also includes a transmission rod 5-7, and one end of the transmission rod 5-7 is connected to the lock member 5 -4 is hinged, and the other end is drivingly matched with the bimetal 13 and the magnetic flux release 24 respectively. Further, the transmission rod 5 - 7 is arranged in the second area A2 and extends along the height direction of the circuit breaker housing 1 .

As shown in Figures 1 and 3a-3b, the leakage test mechanism includes a test button 32 and a switch torsion spring 34 and a matching conductive structure that are sequentially connected in series between the L pole circuit and the N pole circuit of the residual current operated circuit breaker. The test button 32, the switch torsion spring 34 and the matching conductive structure are all located on one side of the handle 5-0 of the operating mechanism 5, and the test button 32 and the handle 5-0 are arranged side by side in the circuit breaker case along the height direction of the circuit breaker case 1. 1 at one end. Further, the switch torsion spring 34 includes a switch arm and a connecting arm, the switch arm is driven and matched with the test button 32, and the connection part is fixedly arranged, and the matching conductive structure includes a matching torsion spring 31, and the two ends of the matching torsion spring 31 are respectively matching arms and the fixed arm, the coordinating arm is driven and matched with the operating mechanism, and the fixed part is fixedly arranged; the short-circuit instantaneous release mechanism 3 is an electromagnetic release, including a yoke 3-0 and a coil assembly 3-1, and the yoke 3-0 is connected to the The L pole contact system is electrically connected; when the circuit breaker is in the opening state, the matching arm is disconnected from the yoke 3-0; when the circuit breaker is switched from the opening state to the closing state, the operating mechanism drives the matching arm and The yoke 3-0 is turned on; the switch arm and the matching conductive structure are kept in a normally open state, and the test button 32 is pressed to drive the switch arm to contact and conduct with the matching conductive structure.

As shown in Figures 2 and 6, the yoke 3-0 is electrically connected to the L-pole static contact 3-2 of the L-pole contact system, and the yoke 3-0 and the L-pole static contact 3-2 are preferably integrated formula structure. Further, the yoke 3-0 includes a yoke bottom plate, a first yoke arm and a second yoke arm, the first yoke arm and the second yoke arm are oppositely arranged and respectively folded with the two ends of the yoke bottom plate The first yoke arm cooperates with the matching arm of the torsion spring 31, the L pole static contact 3-2 and the first yoke arm are connected to the same end of the yoke bottom plate 70 and are connected to the two ends of the yoke bottom plate 70 respectively. end bend.

As shown in Figures 1 and 3a, the axes of the switch torsion spring 34 and the matching torsion spring 31 are arranged in parallel and at intervals, the test button 32 and the handle 5-0 are arranged side by side at intervals, and the moving direction of the test button 32 is in line with the switch torsion spring 34 and the cooperation. The axial direction of the torsion spring 31 is vertical.

As shown in Figure 1, the described matching conductive structure includes a matching torsion spring shaft, and a matching torsion spring 31 is sleeved on the matching torsion spring shaft; pressing the test button 32 makes it drive the switch arm of the switch torsion spring 34 and the matching torsion spring Shaft contact conduction.

As shown in Figure 3a, one end of the first connecting rod 5-1 of the operating mechanism 5 connected to the second connecting rod 5-2 is driven and matched with the matching arm of the torsion spring 31, and the residual current operated circuit breaker is operated by the branch. When the brake state is switched to the closed state, the driving cooperating arm is electrically connected to the magnetic yoke 3-0.

As shown in Figure 1-3a, the residual current operated circuit breaker of the present invention also includes a current limiting resistor 36, which is connected in series between the connecting arm of the switch torsion spring 34 and the N pole terminal of the residual current operated circuit breaker, zero The sequence current transformer 24 is connected in series between the yoke 3-0 and the L pole terminal of the residual current operated circuit breaker. Further, the current limiting resistor 36 is electrically connected to the N pole terminal of the residual current operated circuit breaker through the second wire 37 .

As shown in Figures 1 and 3a-3b, the 18mm wide residual current operated circuit breaker of the present invention also includes an anti-misoperation device arranged in the first area A1. The limit structure 33 for switching between; when the handle 5-0 of the residual current operated circuit breaker is in the opening position, the handle 5-0 cooperates with the limit structure 33 to limit it at the first position, and the limit structure 33 Block the test button 32 from being pressed to the test position; the residual current operated circuit breaker is in the closed state and the handle 5-0 is at the closed position, and the residual current operated circuit breaker trips when the test button 32 is pressed to the test position by external force, The limit structure 33 is driven by the test button 32 to move from the first position to the second position, and then the handle 5-0 is limited by the limit structure 33 during the rotation from the closing position to the opening position, preventing the handle 5-0 from rotating To the opening position, keep the handle 5-0 at the intermediate temporary stop position between the closing position and the opening position. Further, after the test button 32 is released and reset from the test position, the stop structure 33 is reset from the second position to the first position, and the handle 5-0 is rotated to the opening position. Further, after the test button 32 is released and reset from the test position, the stop structure 33 is driven by the handle 5-0 to reset from the second position to the first position.

The anti-misoperation device can prevent the user from being injured by the handle of the operating mechanism when the user presses the test button during the leakage test, and prevents the operator from being afraid of operating the test button due to the fear of being hit by the handle. Situation happens.

As shown in Figures 1 and 3a-3b, the limiting structure 33 is rotated, and the limiting structure 33 is rotated to switch between the first position and the second position.

1, 3a-3b, when the test button 32 is released and reset from the test position, at the same time the handle 5-0 is rotated to the opening position and drives the limit mechanism 33 to reset from the second position to the first position.

As shown in Figures 1 and 3a-3b, the limiting structure 33 is located between the test button 32 and the handle 5-0.

As shown in FIG. 3 b , the limiting structure 33 is rotated and includes a first boss 33 - 0 and a second boss 33 - 1 . As shown in Figure 1 and 3a-3b, when the handle 5-0 is in the opening position, the limit cooperation between the handle 5-0 and the second boss 33-1 will limit the limit structure 33 to the first position, the second A boss 33-0 cooperates with the test button 32 to block the test button 32 from moving to the test position; when the test button 32 is in the test position, the test button 32 and the first boss 33-0 limit the spacer structure 33 When the position is limited at the second position, the second boss 33-1 is limitedly matched with the handle 5-0 to prevent the handle 5-0 from turning to the opening position.

As shown in Figure 3b, the handle 5-0 includes a handle operation part and a handle installation part, one end of the handle operation part protrudes outside the circuit breaker housing 1 for operation, the other end is connected to the handle installation part, and the handle installation part is rotated On the circuit breaker housing 1, the handle installation part is matched with the second boss 33-1. Further, the handle installation part includes a circumferential side wall 5-01 and a limiting platform 5-02; when the handle 5-0 is in the opening position, the circumferential side wall 5-01 and the second boss 33- 1 Limiting fit; when the test button 32 is at the test position and the limiting structure 33 is at the second position, the second boss 33-1 is limitedly cooperating with the limiting platform 33.

As shown in Figure 1, the two ends of the bimetal sheet 13 are double gold mounting end and double gold fitting end respectively, the double gold mounting end is opposite to the first area A1, and the double gold fitting end is located in the second area A2 and the fifth Between the areas A5 and in driving cooperation with the operating mechanism 5 . Further, the double gold fitting end is drivingly matched with the locking member 5-4 of the operating mechanism 5 through the transmission rod 5-7.

As shown in Figure 1-2, the residual current operated circuit breaker with a width of 18 mm of the present invention also includes a second partition 15 and a double-gold support member 14 arranged in the fourth area A4, and the double-gold mounting end of the bimetal sheet 13 is set On the double gold support piece 14, the double gold support piece 14 is fixed between the second partition plate 15 and the circuit breaker housing 1 and is limitedly matched with the second partition plate 15 and the circuit breaker housing 1 respectively, and the adjustment nut 16- 1 is fixed on the second partition 15, and the insulation adjusting knob 17 is arranged on the second partition 15 to rotate around its own axis. Further, as shown in Figures 1 and 3a, the current limiting resistor 36 is arranged on one side of the second partition 15, and the bimetal 13, the double gold support 14 and the adjustment structure are arranged on the other side of the second partition 15 .

As shown in Figure 1, the overload tripping mechanism also includes an adjustment structure, the adjustment structure includes an adjustment screw 16-0, an adjustment nut 16-1 and an insulating adjustment button 17, the adjustment nut 16-1 is fixedly arranged, and the adjustment screw 16-0 Cooperate with the adjusting nut 16-1 thread, one end cooperates with the bimetal sheet 13, the other end cooperates with the insulating adjusting knob 17 and the adjusting screw 16-0 rotates synchronously with the insulating adjusting knob 17, and the insulating adjusting knob 17 improves the adjustment screw 16-0 Insulation clearance and creepage distance to the outside of the residual current operated circuit breaker to improve safety. Further, as shown in FIG. 2 , the insulating adjusting button 17 includes an adjusting button boss, an adjusting button installation part, and an adjusting button operating part connected in sequence. The screw socket, the outer diameter of the adjusting button installation part is larger than the outer diameter of the adjusting button boss and the adjusting button operating part, and the adjusting button installation part is rotatably arranged on the second partition 15 . Further, the adjustment button boss is a polygonal boss, and the screw insertion hole is a polygonal hole.

As shown in Figure 5b, the first partition 2 also includes an air channel 2-20 arranged on one side thereof, and the air channel 2-20 is a labyrinth-shaped air channel, including at least two reversely bent channels, and the air channel One end of the 2-20 is matched with the N-pole contact system, and the other end is provided with at least one exhaust port; the air channel 2-20 avoids excessive arc spraying distance. Further, the air channel 2-20 is provided with two exhaust ports, namely a first exhaust port 2-10 and a second exhaust hole 2-13. Further, the first exhaust hole 2-10 and the second exhaust port 2-13 face two directions perpendicular to each other.

As shown in Figure 5b, the residual current operated circuit breaker of the present invention also includes an N pole arc strike plate 39, which is arranged opposite to the N pole static contact 20 of the N pole contact system, and the N pole movable contact 38 It is located between the N pole arc plate 39 and the N pole static contact 20, and the space between the N pole arc plate 39 and the N pole static contact 20 is opposite to the inlet end of the air channel 2-20.

As shown in Figures 1 and 7, the residual current operated circuit breaker of the present invention also includes a circuit board 30 arranged in the fifth area A5, the circuit board 30, the magnetic flux release 24 and the zero sequence current transformer 27 are arranged along the The bodies 1 are arranged side by side in sequence in the length direction.

As shown in Figures 1 and 7, the residual current operated circuit breaker of the present invention also includes a shield cover 26 and an L-pole power-in terminal board 29 arranged in the fifth area A5, and an L-pole arc striker arranged in the third area A3. plate 25; the L pole arc starting plate 25 and the L pole power-in terminal board 29 are located on both sides of the magnetic flux release 24 respectively, and the L pole arc-starting plate 25 is electrically connected to the L pole power-in terminal board 29 through the first wire 28 Connection; the shielding case 26 includes a shielding case top plate and a shielding case back plate, the shielding case top plate is located between the zero-sequence current transformer 27 and the magnetic flux release 24, and the shielding case back plate is located between the first wire 28 and the magnetic flux release Between the releases 24; the shielding cover 26 can effectively shield the influence of the strong magnetic field generated by the short-circuit current, and avoid demagnetization of the magnetic steel of the flux release 24. Further, as shown in Figure 7, the L-pole power-in terminal board 29 is provided with a groove feature, and one end of the coil of the zero-sequence current transformer 27 cooperates with the groove of the L-pole power-in terminal board 29 to ensure that both soldering reliability.

As shown in Figures 1-2, 4a-4b, the residual current operated circuit breaker with a width of 18 mm of the present invention also includes a magnetic flux release reset structure, and the magnetic flux release reset structure consists of rotating and setting on the circuit breaker housing 1 The driving lever 21 and push rod 22, and the return spring 23; when the magnetic flux tripper 24 moves, the push rod of the magnetic flux tripper 24 is ejected to drive the push rod 22 to rotate, and the push rod 22 drives the operating mechanism 5 Tripping; after the residual current operated circuit breaker is tripped and opened due to the action of the magnetic flux release 24, the return spring 23 drives the lever 21 to rotate, and at the same time the lever 21 drives the push rod 22 to rotate in the direction of resetting the ejector rod ; When the residual current operated circuit breaker is switched on, the operating mechanism 5 drives the lever 21 to rotate so that it is separated from the push rod 22 . Further, when the magnetic flux release 4 is in action, the push rod 22 drives the locking member 5-4 of the operating mechanism 5 to rotate to release the snap fit with the jumper 5-3, so that the operating mechanism 5 is released. . Further, when the magnetic flux tripper 4 operates, the push rod 22 drives the locking member 5-4 to rotate through the transmission rod 5-7. Further, as shown in FIG. 1 , the magnetic flux release reset structure is arranged between the arc extinguishing system 4 and the magnetic flux release 24 .

As shown in Figures 1-2, 4a-4b, the middle part of the push rod 22 is rotatably arranged on the circuit breaker housing 1, one end cooperates with the transmission rod 8a, and the other end cooperates with the driving rod 21 and the magnetic flux release 24 respectively. .

As shown in Figures 1-2, 4a-4b, the resetting structure of the magnetic flux tripper also includes a pull rod 18, the pull rod 1 is slidably arranged on the circuit breaker housing 1, and the lever 5-6 of the operating mechanism 5 communicates with the pull rod 18. Lever 2 drive fit. Further, the lever shaft 5-51 of the lever 5-6 is drivingly matched with the driving rod 21 through the pull rod 18. Further, one end of the driving rod 21 is rotatably arranged on the circuit breaker housing 1 , the middle part is matched with the pull rod 1 , and the other end is drivingly matched with the push rod 3 .

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims

A residual current operated circuit breaker with a width of 18 mm is characterized in that it includes a circuit breaker housing (1), and on a projection perpendicular to the width direction of the circuit breaker housing (1), the circuit breaker housing (1) includes The first area (A1), the second area (A2), the third area (A3), the fourth area (A4) and the fifth area (A5) arranged therein; said 18mm width residual current operated circuit breaker It also includes the operating mechanism (5) and leakage test mechanism arranged in the first area (A1), the short-circuit instantaneous release mechanism (3), the L-pole contact system and the N-pole contact system arranged in the second area (A2). The head system, the arc extinguishing system (4) arranged in the third area (A3), the overload release mechanism including the bimetal (13) arranged in the fourth area (A4), and the fifth area ( The zero-sequence current transformer (27) and the magnetic flux release (24) in A5); the L pole contact system and the N pole contact system are arranged side by side along the width direction of the circuit breaker housing (1); the The zero-sequence current transformer (27) and the magnetic flux release (24) are arranged side by side along the length direction of the circuit breaker housing (1) and are respectively arranged opposite to the second area (A2) and the third area (A3).
The residual current operated circuit breaker with a width of 18mm according to claim 1, characterized in that: the first area (A1), the second area (A2) and the third area (A3) are along the circuit breaker housing (1) The length direction of the circuit breaker housing (1) is arranged in sequence and is located at one end in the height direction of the circuit breaker housing (1), and the fourth area (A4) and the fifth area (A5) are located at the other end in the height direction of the circuit breaker housing (1); The second area (A2) and the third area (A3) are arranged side by side with the fifth area (A5) along the height direction of the circuit breaker housing (1); the first area (A1) and the second area ( A2), arranged side by side with the fourth area (A4) along the height direction of the circuit breaker housing (1); a part of the fourth area (A4) is located between the second area (A2) and the fifth area (A5) ; The zero-sequence current transformer (27) and the magnetic flux release (24) are set opposite to the second area (A2) and the third area (A3) respectively.
The residual current operated circuit breaker with a width of 18mm according to claim 2, characterized in that: the fourth area (A4) is an L-shaped structure, one end of which is located between the second area (A2) and the fifth area (A5) Between, the other end and the fifth area (A5) are arranged side by side along the length direction of the circuit breaker housing (1).
The residual current operated circuit breaker with a width of 18mm according to any one of claims 1-3, characterized in that: the operating mechanism (5) includes handles (5- 0), jump button (5-3), lock button (5-4) and lever (5-5), and first connecting rod (5-1) and second connecting rod (5-2); One end of the first connecting rod (5-1) is hinged to the handle (5-0), and the other end is hinged to one end of the second connecting rod (5-2) and is slidably inserted into the jumper of the jumper (5-3). In the waist-shaped hole of the piece, the other end of the second connecting rod (5-2) is hinged with the lever (5-5), and the lever (5-5) is respectively connected with the N pole moving contact (38) and the L pole of the N pole contact system. The L-pole moving contact (19) of the pole contact system is driven and connected, the jumper (5-3) and the lock (5-4) are snap-fitted, and the lock (5-4) is released instantaneously by a short circuit The drive of mechanism (3), overload release mechanism or magnetic flux release (24) rotates to release the hasp cooperation with the jumper (5-3), so that the operating mechanism is released.
The residual current operated circuit breaker with a width of 18 mm according to claim 4, characterized in that: the residual current operated circuit breaker also includes a first separator (2), a short-circuit instantaneous release mechanism (3), an L-pole contact The system and the arc extinguishing system (4), and the N-pole contact system are respectively located on both sides of the first partition (2);

The lever (5-5) includes a lever partition (5-50), the L pole moving contact (19) and the N pole moving contact (38) are respectively located on both sides of the lever partition (5-50), and the lever partition ( 5-50) overlaps with the first partition (2), and the first partition (2) at least partially extends between the L pole moving contact (19) and the N pole moving contact (38); the L pole When the movable contact (19) and the N pole movable contact (38) move together with the lever (5-5), the lever partition (5-50) and the first dividing plate (2) always keep at least a partial overlap.
The residual current operated circuit breaker with a width of 18mm according to claim 4, characterized in that: the short-circuit instantaneous release mechanism (3) directly drives and cooperates with the locking member (5-4); the operating mechanism also includes a transmission Rod (5-7), one end of transmission rod (5-7) is hinged with lock catch (5-4), and the other end drives and cooperates with bimetallic strip (13) and magnetic flux tripper (24) respectively.
The residual current operated circuit breaker with a width of 18 mm according to claim 4, characterized in that: one end of the locking member (5-4) is rotatably arranged on the circuit breaker housing (1), and the other end is provided with an active surface (61) and the knocking part (62), the driven surface (61) and the short-circuit instantaneous release mechanism (3) are drivingly matched, and the knocking part (62) is connected to the L pole moving contact (19) of the L pole contact system. Drive fit; when the driven surface (61) is hit by the short-circuit instantaneous release mechanism (3) to make the lock (5-4) rotate, the knocking part (62) hits the L-pole moving contact (19), Make it break with the L pole static contact (3-2) of the L pole contact system.
The residual current operated circuit breaker with a width of 18mm according to any one of claims 1-3, characterized in that: the leakage test mechanism includes a test button (32) and an L pole circuit connected in series with the residual current operated circuit breaker in sequence. The switch torsion spring (34) and the matching conductive structure between the N pole circuits, the test button (32), the switch torsion spring (34) and the matching conductive structure are all located on one side of the handle (5-0) of the operating mechanism (5) , the test button (32) and the handle (5-0) are arranged side by side along the height direction of the circuit breaker housing (1);

The two ends of the switch torsion spring (34) are respectively a switch arm and a connecting arm, the switch arm is driven and matched with the test button (32), the connecting arm is fixedly arranged, and the matching conductive structure includes a matching torsion spring (31), and a matching torsion spring (31). ) are respectively a matching arm and a fixed arm, the matching arm is driven and matched with the operating mechanism, and the fixed arm is fixedly set; the short-circuit instantaneous tripping mechanism (3) is an electromagnetic release, including a yoke (3-0) and The coil assembly (3-1), the magnetic yoke (3-0) is electrically connected to the L-pole contact system; when the circuit breaker is in an open state, the matching arm is disconnected from the magnetic yoke (3-0); the circuit breaker When the device switches from the opening state to the closing state, the operating mechanism drives the matching arm and the yoke (3-0) to conduct; the switching arm and the matching conductive structure remain normally open, and the test button (32) is pressed to make it drive The switch arm contacts and conducts with the matching conductive structure.
The residual current operated circuit breaker with a width of 18mm according to any one of claims 1-3, characterized in that: the residual current operated circuit breaker with a width of 18mm also includes an anti-misoperation set in the first area (A1) device, the anti-misoperation device includes a limit structure (33) that can switch between the first position and the second position; when the handle (5-0) of the residual current operated circuit breaker is in the opening position, the handle (5-0) -0) cooperate with the limit structure (33) to limit the limit structure (33) to the first position, and the limit structure (33) blocks the test button (32) of the leakage test mechanism from being pressed to the test position; When the circuit breaker is in the closed state, the external force presses the test button (32) to the test position, the limit structure (33) moves to the second position, and the blocking handle (5-0) rotates to the open position;

After the test button (32) is released and reset, the limit structure (33) is driven by the handle (5-0) to reset from the second position to the first position, and the handle (5-0) rotates to the opening position.
The residual current operated circuit breaker with a width of 18mm according to any one of claims 1-3, characterized in that: the two ends of the bimetal sheet (13) are the double gold mounting end and the double gold fitting end respectively, and the double gold The installation end is opposite to the first area (A1), and the double gold fitting end is located between the second area (A2) and the fifth area (A5) and is drivingly matched with the operating mechanism (5).
The residual current operated circuit breaker with a width of 18mm according to claim 10, characterized in that: the overload tripping mechanism also includes an adjustment structure, and the adjustment structure includes an adjustment screw (16-0), an adjustment nut (16-1) and Insulation adjustment knob (17), adjustment nut (16-1) fixed setting, adjustment screw (16-0) and adjustment nut (16-1) thread fit, one end cooperates with bimetal sheet (13), and the other end cooperates with insulation adjustment The button (17) cooperates and the adjustment screw (16-0) rotates synchronously with the insulation adjustment button (17);

The residual current operated circuit breaker with a width of 18mm also includes a second partition (15) and a double gold support (14) arranged in the fourth area (A4), and the double gold installation end is arranged on the double gold support (14) ), the double gold support (14) is fixed between the second partition (15) and the circuit breaker housing (1), the adjusting nut (16-1) is fixed on the second partition (15), and the insulation adjustment The button (17) is rotatably arranged on the second partition (15) around its own axis.
The residual current operated circuit breaker with a width of 18 mm according to any one of claims 1-3, characterized in that: the residual current operated circuit breaker also includes a first partition (2), and the first partition (2) includes The air passage (2-20) arranged on one side thereof, the air passage (2-20) is a labyrinth air passage, including at least two reversely bent passages, one end of the air passage (2-20) is in contact with the N pole The system is relatively matched, and the other end is provided with at least one exhaust port.
The residual current operated circuit breaker with a width of 18 mm according to any one of claims 1-3, characterized in that: the residual current operated circuit breaker with a width of 18 mm also includes a circuit board ( 30), the circuit board (30), the magnetic flux release (24) and the zero-sequence current transformer (27) are arranged side by side in sequence along the length direction of the circuit breaker housing (1).
The residual current operated circuit breaker with a width of 18mm according to any one of claims 1-3, characterized in that: the residual current operated circuit breaker with a width of 18mm also includes a shield (26) arranged in the fifth area (A5) ) and the L pole incoming power terminal board (29), and the L pole arc striking plate (25) arranged in the third area (A3);

The L-pole arc-starting plate (25) and the L-pole power-in terminal board (29) are respectively located on both sides of the magnetic flux release (24), and the L-pole arc-starting plate (25) communicates with the L-pole through the first wire (28). The power-in terminal board (29) is electrically connected; the shielding case (26) includes a shielding case top plate and a shielding case back plate, and the shielding case top plate is located between the zero-sequence current transformer (27) and the magnetic flux release (24) , the back plate of the shielding case is located between the first wire (28) and the magnetic flux release (24).
The residual current operated circuit breaker with a width of 18 mm according to any one of claims 1-3, characterized in that: the residual current operated circuit breaker with a width of 18 mm also includes a magnetic flux release reset structure, and the magnetic flux release The reset structure includes rotating the driving lever (21) and the push rod (22) respectively arranged on the circuit breaker housing (1), and the reset spring (23);

When the magnetic flux release (24) moves, the push rod of the magnetic flux release (24) is ejected to drive the push rod (22) to rotate, and the push rod (22) drives the operating mechanism (5) to trip; After the residual current operated circuit breaker is tripped and opened due to the action of the magnetic flux release (24), the return spring (23) drives the lever (21) to rotate, and at the same time the lever (21) drives the push rod (22) to The push rod rotates in the direction of reset; when the residual current operated circuit breaker is switched on, the operating mechanism (5) drives the driving rod (21) to rotate to separate it from the push rod (22).