Overload alarm structure of oil-immersed circuit breaker

Abstract

The utility model discloses an overload alarm structure of an oil-immersed circuit breaker, which comprises an overload driving structure, an elastic re-buckling piece, an alarm tripping piece and an alarm triggering assembly which are arranged on a shell, and the elastic re-buckling piece is respectively connected with the overload driving structure and the alarm tripping piece. The alarm triggering assembly comprises a spring piece used for connecting or disconnecting a circuit between the two conductive terminals, the spring piece comprises a first contact part making contact with one conductive terminal and a second contact part connected with the alarm tripping piece, and the spring piece recovers deformation and connects the two conductive terminals when the alarm tripping piece is in a tripping state. According to the technical scheme, when the circuit breaker is overloaded, the alarm tripping piece and the alarm triggering assembly are matched to trigger the alarm action so as to prompt a user that a circuit overload fault occurs, and whether a loop is cut off or not can be judged and selected manually, so that heavy loss caused by sudden disconnection of the circuit is avoided, and the service life of the circuit breaker is prolonged. And the overload alarm function of the oil-immersed circuit breaker is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electrical apparatus technical field, concretely relates to an oil immersed circuit breaker overload alarm structure. BACKGROUND

[0002] The oil immersed circuit breaker is a kind of power switch equipment using high insulation oil as medium.In power system, the oil immersed circuit breaker is mainly used for the protection and control of power transmission and distribution network, can cut off and isolate fault current in circuit, protects power equipment and personal safety.When circuit works normally, circuit breaker can reach the functions such as power off, power supply and conversion circuit by closing or opening the circuit that supplies power.When overload, voltage loss, under voltage or short circuit fault occurs in circuit, circuit breaker can also automatically cut off the circuit, avoid endangering the safety of staff and normal operation of equipment due to circuit fault.

[0003] The existing circuit breaker has short-circuit protection and overload protection two major protection functions, and the overload protection is realized by the thermal trip structure of circuit breaker, and the thermal trip structure mainly includes bimetallic strip, card, trip hook and limiting stop plate, the bimetallic strip is fixedly connected with the card, one end of the card is buckled on the trip hook, when temperature continues to rise or current continues to rise, the card will be separated from the card head, the card head rotates under the action of card head spring and drives the limiting stop plate to swing, so that the moving contact is separated from the limiting stop plate and the static contact to realize the tripping action.But in important working place, if circuit breaker automatically cuts off the circuit due to overload in circuit, it often causes major economic loss, therefore, circuit breaker needs to give warning in advance when overload occurs in circuit to remind, so that user can quickly eliminate circuit fault, thereby avoiding major loss caused by sudden circuit opening, for this purpose, the technical field designs an oil immersed circuit breaker overload alarm structure that gives alarm prompt when overload occurs. SUMMARY

[0004] Therefore, the utility model aims at overcoming the deficiency existing in present technology, to provide an oil immersed circuit breaker overload alarm structure that gives warning in advance when overload occurs in circuit to remind, so that user can quickly eliminate circuit fault, thereby avoiding major loss caused by sudden circuit opening.

[0005] In order to achieve the above object, the utility model provides an oil immersed circuit breaker overload alarm structure, including setting in the overload drive structure, elastic relocking spare, alarm tripping spare, alarm trigger assembly of shell, elastic relocking spare is connected with the overload drive structure and alarm tripping spare respectively, alarm tripping spare has with elastic relocking spare and forms the locking state of positioning cooperation, and with elastic relocking spare separates and occurs the tripping state of rotation, the overload drive structure drives elastic relocking spare and moves to the side away from alarm tripping spare, alarm trigger assembly includes two conducting terminals and the spring spare for turning on or turning off the circuit between two conducting terminals of shell, the spring spare includes with the first contact part of one conducting terminal contact, and the second contact part of connecting alarm tripping spare, the spring spare is extruded elastic deformation when alarm tripping spare is in the locking state, and restores deformation and is connected with two conducting terminals when alarm tripping spare is in the tripping state.

[0006] As a preferred scheme, two conducting terminals are threadedly connected to the shell and have connecting ends penetrating out of the shell respectively, and the spring spare is a torsion spring arranged between the two conducting terminals.

[0007] As a preferred scheme, the first contact part is a first elastic foot of the torsion spring extending against one of the conducting terminals.

[0008] As a preferred scheme, the second contact part is a second elastic foot of the torsion spring extending and connected between the other conducting terminal and the alarm tripping spare.

[0009] As a preferred scheme, the alarm tripping spare is rotationally arranged in the shell and has a connecting rod cooperating with the second elastic foot, the second contact part includes a bent section cooperating against the other conducting terminal, and a hook end hooked against the connecting rod from the bent section.

[0010] As a preferred scheme, the elastic relocking spare includes a relocking spare rotationally arranged in the shell and a relocking spring connected with the relocking spare, the alarm tripping spare is located on a movement path of the relocking spare, and the relocking spring drives the relocking spare to move to the side close to the alarm tripping spare, so that the relocking spare cooperates against the alarm tripping spare to form positioning cooperation.

[0011] As a preferred scheme, a locking structure forming positioning cooperation is arranged between the alarm tripping spare and the relocking spare, the locking structure includes a positioning boss arranged at a bottom of the relocking spare and a positioning hook arranged on the alarm tripping spare and cooperating with the positioning boss, and the positioning boss and the positioning hook cooperate to hook against each other to limit rotation of the alarm tripping spare.

[0012] As a preferred scheme, the relocking spring is arranged between a top of the relocking spare and an inner top surface of the shell.

[0013] As a preferred solution, the overload driving structure comprises a temperature sensing element connected to the main circuit of the circuit breaker, and a driving rod fixed at one end of the temperature sensing element, the driving rod extending to contact the bottom of the re-catch, the bottom of the re-catch being provided with a contact groove matched with the driving rod, and a positioning boss being arranged at one side of the contact groove.

[0014] As a preferred solution, the handle slider is arranged on the shell to slide, and the alarm trip includes a reset push rod arranged on the movement path of the handle slider.

[0015] Compared with the prior art, the technical scheme of the utility model has the following advantages:

[0016] 1. In the oil-immersed circuit breaker overload alarm structure, two conductive terminals are connected through a spring element to report an alarm circuit, the spring element is connected to one of the conductive terminals through a first contact part, and is connected to the alarm trip through a second contact part, when the circuit breaker is working normally, the alarm trip is in a locked state and presses the second contact part of the spring element, so that the spring element is elastically deformed under pressure and moves away from the other conductive terminal, that is, the alarm circuit is disconnected; in the case of overload or temperature rise of the circuit breaker, the overload driving structure drives the elastic re-catch to separate from the alarm trip, so that the alarm trip rotates under the action of the spring element and switches from the locked state to the tripped state, at this time, the spring element connects the two conductive terminals after restoring the deformation, thereby connecting the alarm circuit to realize the overload alarm function, the advantages of the technical scheme are that when the circuit breaker is overloaded, the alarm trip cooperates with the alarm trigger assembly to trigger the alarm action, so as to prompt the user that the circuit is overloaded, and the user can artificially judge and select whether to cut off the circuit, or make the user quickly eliminate the circuit fault, thereby avoiding significant losses caused by sudden disconnection of the circuit, and thus realizing the oil-immersed circuit breaker overload alarm function.

[0017] 2. The oil-immersed circuit breaker overload alarm structure provided by the utility model, wherein the spring member is a torsion spring arranged between the two conductive terminals, the torsion spring has a first elastic leg of a second elastic leg extending to abut against one of the conductive terminals, and a second elastic leg of the second elastic leg extending and connected between the other conductive terminal and the alarm tripping member, the second elastic leg is provided with a hook end hooked on a connecting rod of the alarm tripping member, the structure is arranged such that when the alarm tripping member is in a locking state, the torsion spring is pressed, the torsion spring drives the bent section to separate from the other conductive terminal in the elastic deformation process, thereby breaking the circuit between the two conductive terminals, and when the alarm tripping member is switched to a tripping state, the torsion spring contacts the other conductive terminal through the bent section in the deformation recovery process, thereby connecting the circuit between the two conductive terminals, the torsion spring has a large elastic storage capacity per unit volume, the spring has a small mass, the spring is convenient to arrange between the two conductive terminals and the elastic alarm tripping member, the structure is compact, and the spring is convenient to install, the torsion spring can play an elastic conductive role between the two conductive terminals and provide elastic force required for the rotation of the alarm tripping member in the tripping state.

[0018] 3. The oil-immersed circuit breaker overload alarm structure provided by the utility model, wherein the overload driving structure is composed of an induction element and a driving rod, the driving rod extends to abut against the bottom of the re-docking member, the induction element is preferably a double gold structure, when the double gold structure is heated and bent, the double gold structure pushes the re-docking member to rotate away from the alarm tripping member, the re-docking member is separated from the alarm tripping member, the spring member connects the two conductive terminals in the deformation recovery process and drives the alarm tripping member to switch from the locking state to the tripping state, thereby realizing the overload alarm action of the circuit breaker, the circuit breaker adopting the technical solution replaces the double gold structure with the elastic re-docking member to position and hold the alarm tripping member and release the alarm tripping member in the tripping state, thereby overcoming the problem that the double gold structure is easily tripped from the alarm tripping member, the cooperation stability is good, thereby realizing the overload alarm function of the circuit breaker and improving the product use safety. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings required in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0020] Figure 1 It is a structural schematic view of the oil-immersed circuit breaker overload alarm structure of the utility model;

[0021] Figure 2 It is an installation structural schematic view of the spring member of the utility model;

[0022] Figure 3 The utility model provides an internal structure schematic diagram of oil immersed circuit breaker.

[0023] Figure 4 The utility model discloses a connection structure schematic diagram of alarm tripping part and elastic relocking part.

[0024] The figure mark explanation: 1, overload drive structure;11, temperature sensing element;12, drive rod;2, elastic relocking part;21, relocking part;22, relocking spring;23, positioning boss;3, alarm tripping part;31, positioning hook;32, connecting rod;33, reset push rod;4, conducting terminal;5, spring part;51, first contact part;52, second contact part;521, bending section;522, hook claw end;6, jump relocking part;7, limit plate;8, handle sliding block;9, shell. Specific embodiments

[0025] The technical scheme of the utility model will be described clearly and completely below in conjunction with the drawings, and obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0026] In the description of the utility model, it is necessary to explain that the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the utility model, it is necessary to explain that unless there is explicit provision and limitation, the terms "installation", "connection", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through intermediate medium, can be the communication of two elements inside. For the person skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] Embodiments

[0029] The embodiment provides a kind of as Figures 1-4The overload alarm structure of the oil-immersed circuit breaker comprises an overload driving structure 1, an elastic reset component 2, an alarm tripping component 3 and an alarm trigger assembly arranged in a shell 9. The elastic reset component 2 is connected to the overload driving structure 1 and the alarm tripping component 3 respectively. The alarm tripping component 3 has a locking state in which it is positioned in cooperation with the elastic reset component 2 and a tripping state in which it rotates away from the elastic reset component 2. The overload driving structure 1 drives the elastic reset component 2 to move away from the alarm tripping component 3. The alarm trigger assembly comprises two conductive terminals 4 arranged in the shell 9 and a spring component 5 for connecting or disconnecting the circuit between the two conductive terminals 4. The two conductive terminals 4 can be externally connected to an alarm or an alarm lamp or other alarm devices through a wire. Therefore, when the spring component 5 connects the two conductive terminals 4, an alarm circuit for triggering the alarm or the alarm lamp is formed. Further preferably, the spring component 5 comprises a first contact part 51 in contact with one of the conductive terminals 4 and a second contact part 52 connected to the alarm tripping component 3. When the alarm tripping component 3 is in the locking state, the spring component 5 is pressed and elastically deformed and separated from the other conductive terminal 4, thereby disconnecting the two conductive terminals 4. When the alarm tripping component 3 is in the tripping state, the spring component 5 restores the deformation and contacts the other conductive terminal 4, thereby connecting the two conductive terminals 4.

[0030] The above embodiment is the core technical solution of the present embodiment. According to the present embodiment, the two conductive terminals 4 are connected through the spring component 5 to form an alarm circuit. The spring component 5 is connected to one of the conductive terminals 4 through the first contact part 51 and connected to the alarm tripping component 3 through the second contact part 52. When the circuit breaker is working normally, the alarm tripping component 3 is in the locking state and presses the second contact part 52 of the spring component 5, so that the spring component 5 is elastically deformed and moves away from the other conductive terminal 4, thereby disconnecting the alarm circuit. When the circuit breaker is overloaded or the temperature rises, the overload driving structure 1 drives the elastic reset component 2 to separate from the alarm tripping component 3, so that the alarm tripping component 3 rotates under the action of the spring component 5 and switches from the locking state to the tripping state. At this time, the spring component 5 restores the deformation and connects the two conductive terminals 4, thereby connecting the alarm circuit to realize the overload alarm function. The present embodiment has the advantage that when the circuit breaker is overloaded, the alarm tripping component 3 cooperates with the alarm trigger assembly to trigger the alarm action, thereby prompting the user that the circuit is overloaded. The user can artificially judge and select whether to cut off the circuit or make the user quickly eliminate the circuit fault, thereby avoiding significant losses caused by sudden disconnection of the circuit. Thus, the overload alarm function of the oil-immersed circuit breaker is realized.

[0031] As a preferred embodiment, the two conductive terminals 4 are screwed to the shell 9 and each has a connecting end penetrating out of the shell 9, and a wiring assembly for connecting a wire is arranged on the connecting end, so that an alarm or an alarm lamp is connected to the connecting ends of the two conductive terminals 4 through the wire, and when the two conductive terminals 4 are connected through the spring member 5, an alarm circuit is formed to trigger the alarm or the alarm lamp to be turned on to remind the user that a line overload fault occurs and corresponding safety measures should be taken in time.

[0032] The specific setting mode of the spring member 5 will be described in detail below. Figures 1-2 The specific setting mode of the spring member 5 will be described in detail below.

[0033] The spring member 5 is a torsion spring arranged between the two conductive terminals 4, the first contact part 51 is a first elastic leg of the torsion spring extending to abut against one of the conductive terminals 4, and the second contact part 52 is a second elastic leg of the torsion spring extending to connect between the other conductive terminal 4 and the alarm tripping member 3, wherein the alarm tripping member 3 is rotationally arranged on the shell 9 and has a connecting rod 32 matched with the second elastic leg, and the second contact part 52 includes a bent segment 521 matched with the other conductive terminal 4 and a hook end 522 extending from the bent segment 521 to hook against the connecting rod 32. With this structure, when the alarm tripping member 3 is in a locking state, the torsion spring is pressed to separate the bent segment 521 from the other conductive terminal 4 in the elastic deformation process, so as to disconnect the circuit between the two conductive terminals 4; and when the alarm tripping member 3 is switched to a tripped state, the torsion spring contacts the other conductive terminal 4 through the bent segment 521 in the elastic deformation recovery process, so as to connect the circuit between the two conductive terminals 4. The torsion spring has a large elastic storage capacity per unit volume, a small spring mass, and is convenient to arrange between the two conductive terminals 4 and the alarm tripping member 3, and has a compact structure and is convenient to install. In addition, the torsion spring can play an elastic conductive role between the two conductive terminals 4 and provide an elastic force required for the rotation of the alarm tripping member 3 in the tripped state.

[0034] The handle slider 8 is arranged on the shell 9 in a sliding manner, and the handle slider 8 is used to operate a contact mechanism in the circuit breaker to perform opening and closing actions. The alarm tripping member 3 includes a reset push rod 33 arranged on a movement path of the handle slider 8. When the circuit breaker needs to be closed, the reset push rod 33 is pushed during the closing movement of the handle slider 8, so that the alarm member is tripped and reset to rotate to an initial position matched with the elastic reclosing member 2, that is, the reset of the alarm member is realized.

[0035] The specific setting mode of the spring member 5 will be described in detail below. Figures 1-4 The specific setting mode of the spring member 5 will be described in detail below.

[0036] The elastic reclosing component 2 comprises a reclosing component 21 rotatably arranged in the shell 9 and a reclosing spring 22 connected with the reclosing component 21, the alarm tripping component is located on the movement path of the reclosing component 21, and the reclosing spring 22 drives the reclosing component 21 to move towards the side close to the alarm tripping component 3 to form a positioning cooperation with the alarm tripping component 3, the reclosing spring 22 is arranged between the top of the reclosing component 21 and the inner top surface of the shell 9, and further preferably, a locking structure for forming the positioning cooperation is arranged between the alarm tripping component 3 and the reclosing component 21, the locking structure comprises a positioning boss 23 arranged at the bottom of the reclosing component 21 and a positioning hook 31 arranged on the alarm tripping component 3 and matched with the positioning boss 23, and the arrangement of the locking structure is that, in the case that the circuit breaker is in the closed state, the reclosing component 21 is pressed and contacted to the overload driving structure 1 and the alarm tripping component 3 respectively under the action of the reclosing spring 22, so that the reclosing component 21 and the alarm tripping component 3 are connected through the clamping cooperation of the positioning boss 23 and the positioning hook 31, the alarm tripping component 3 is limited from rotating when the positioning boss 23 and the positioning hook 31 are clamped, so that the alarm tripping component 3 is kept in the locked state, and the tripping action of the alarm tripping component 3 is triggered only through the action of the elastic reclosing component 2 when the circuit breaker fails in overload, so that the alarm tripping component 3 is switched from the locked state to the tripped state, thereby realizing the overload alarm action of the circuit breaker.

[0037] In the embodiment, the overload driving structure 1 comprises a temperature sensing element 11 connected to the main circuit of the circuit breaker and a driving rod 12 fixed at one end of the temperature sensing element, the driving rod 12 is extended and matched to be contacted at the bottom of the reclosing component 21, the bottom of the reclosing component 21 is provided with a contact groove matched with the driving rod 12, and one side of the contact groove is provided with the positioning boss 23, and the sensing element is preferably a double gold structure, which will push the reclosing component 21 to rotate away from the alarm tripping component 3 when it is heated and bent, so that the reclosing component 21 and the alarm tripping component 3 are released from the positioning cooperation and separated, at this time, the spring component 5 is connected to the two conductive terminals 4 in the process of restoring the deformation, and drives the alarm tripping component 3 to switch from the locked state to the tripped state, thereby realizing the overload alarm action of the circuit breaker, and the circuit breaker adopting the technical solution replaces the double gold structure to position and keep the alarm tripping component 3 and release the alarm tripping component 3, thereby overcoming the problem that the double gold structure and the alarm tripping component 3 are easily buckled, has good cooperation stability, thereby realizing the overload alarm function of the circuit breaker and improving the safety of product use.

[0038] It should be understood that the oil-immersed circuit breaker provided in the embodiment comprises an overload tripping structure for realizing the overload tripping opening of the circuit breaker, and the overload tripping structure comprises the overload driving structure 1 and the elastic reclosing component 2. Figure 3 and Figure 4The overload tripping structure is composed of a double gold structure, an elastic re-closing part 2, a jump closing part 6 and a limiting plate 7, the jump closing part 6 and the alarm tripping part 3 are coaxially arranged in the shell 9, the limiting plate 7 is arranged in the rotating path of the jump closing part 6, the elastic re-closing part 2 is in positioning cooperation with the jump closing part 6 and the alarm tripping part 3, therefore, when the main circuit has an overload fault, the double gold structure is pushed to move the elastic re-closing part 2 to the side away from the jump closing part 6 when it is heated and bent, the jump closing part 6 is rotated when it is separated from the elastic re-closing part 2, and the limiting plate 7 is rotated to release the limiting of the contact mechanism, so as to trigger the contact mechanism to perform the tripping and opening action, and finally realize the overload tripping and opening of the circuit breaker. The overload tripping structure is used in cooperation with the overload alarm structure, the distance between the elastic re-closing part 2 and the jump closing part 6 and the alarm tripping part is reasonably designed, the elastic re-closing part 2 is separated from the jump closing part 6 and the alarm tripping part 3 in sequence, the function of the overload pre-alarm is realized, the alarm is sent instead of the automatic circuit opening when the circuit breaker has an overload, whether to cut off the circuit can be artificially judged and selected, or the user can quickly eliminate the circuit fault, so as to avoid the great loss caused by the sudden circuit opening, the function of the overload alarm but not opening is realized.

[0039] Obviously, the above embodiments are only examples for clearly illustrating, but not limitation to the embodiments. Other different forms of changes or variations can be made on the basis of the above description for the ordinary skilled in the art. All the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.

Claims

1. An overload alarm structure of oil-immersed circuit breaker, comprising an overload driving structure (1) arranged in a shell (9), an elastic reclosing member (2), an alarm tripping member (3), and an alarm triggering assembly, the elastic reclosing member (2) being connected with the overload driving structure (1) and the alarm tripping member (3) respectively, characterized in that: The alarm tripping part (3) has a locking state of positioning cooperation with the elastic reclosing part (2) and a tripping state of rotating away from the elastic reclosing part (2), the overload driving structure (1) drives the elastic reclosing part (2) to move away from the alarm tripping part (3), the alarm triggering assembly includes two conductive terminals (4) arranged in the shell (9) and a spring part (5) for connecting or disconnecting the circuit between the two conductive terminals (4), the spring part (5) includes a first contact part (51) in contact with one of the conductive terminals (4) and a second contact part (52) connected with the alarm tripping part (3), the spring part (5) is elastically deformed when the alarm tripping part (3) is in the locking state, and the spring part (5) restores the deformation and connects the two conductive terminals (4) when the alarm tripping part (3) is in the tripping state.

2. The oil immersed circuit breaker overload alarm structure according to claim 1, characterized in that The two conductive terminals (4) are screwed to the shell (9) and have connecting ends penetrating out of the shell (9), and the spring part (5) is a torsion spring arranged between the two conductive terminals (4).

3. The oil immersed circuit breaker overload alarm structure according to claim 2, wherein The first contact part (51) is a first elastic foot of the torsion spring extending against one of the conductive terminals (4).

4. The oil immersed circuit breaker overload alarm structure according to claim 2, wherein The second contact part (52) is a second elastic foot of the torsion spring extending and hooked between the other conductive terminal (4) and the alarm tripping part (3).

5. The oil immersed circuit breaker overload alarm structure according to any one of claims 1-4, characterized in that The alarm tripping part (3) is rotatably arranged in the shell (9) and has a connecting rod (32) cooperating with the second elastic foot, and the second contact part (52) includes a bent section (521) cooperating against the other conductive terminal (4) and a hook end (522) extending and hooked against the connecting rod (32) from the bent section (521).

6. The oil immersed circuit breaker overload alarm structure according to claim 1, wherein The elastic reclosing part (2) includes a reclosing part (21) rotatably arranged in the shell (9) and a reclosing spring (22) connected with the reclosing part (21), the alarm tripping part (3) is located in a movement path of the reclosing part (21), and the reclosing spring (22) drives the reclosing part (21) to move towards the alarm tripping part (3) to make the reclosing part (21) cooperate against the alarm tripping part (3) to form positioning cooperation.

7. The oil immersed circuit breaker overload alarm structure according to claim 6, characterized in that The alarm tripping part (3) and the reclosing part (21) are provided with a locking structure forming positioning cooperation, the locking structure includes a positioning boss (23) arranged at a bottom of the reclosing part (21) and a positioning hook (31) arranged on the alarm tripping part (3) and cooperating with the positioning boss (23), and the positioning boss (23) and the positioning hook (31) are hooked against each other to limit the rotation of the alarm tripping part (3).

8. The oil immersed circuit breaker overload alarm structure according to claim 7, characterized in that The reclosing spring (22) is arranged between a top of the reclosing part (21) and an inner top surface of the shell (9).

9. The oil immersed circuit breaker overload alarm structure according to any one of claims 6-8, characterized in that The overload driving structure (1) comprises a temperature sensing element (11) connected to the main circuit of the circuit breaker, and a driving rod (12) fixed to one end of the temperature sensing element, the driving rod (12) extends to contact the bottom of the re-coupling part (21), the bottom of the re-coupling part (21) is provided with a contact groove matched with the driving rod (12), and one side of the contact groove is provided with a positioning boss (23).

10. The oil immersed circuit breaker overload alarm structure according to claim 1, wherein The handle sliding block (8) is slidably arranged on the shell (9), and the alarm tripping part (3) comprises a reset push rod (33) arranged on the movement path of the handle sliding block (8).

Images