CN213635834U - Reclosing switching device of high-voltage outdoor pole-mounted circuit breaker and load switch - Google Patents
Reclosing switching device of high-voltage outdoor pole-mounted circuit breaker and load switch Download PDFInfo
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- CN213635834U CN213635834U CN202022868381.9U CN202022868381U CN213635834U CN 213635834 U CN213635834 U CN 213635834U CN 202022868381 U CN202022868381 U CN 202022868381U CN 213635834 U CN213635834 U CN 213635834U
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- circuit breaker
- switching device
- load switch
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Abstract
The utility model provides a reclosing switching device of a high-voltage outdoor pole-mounted circuit breaker and a load switch, which comprises a rotating shaft, a reclosing operating handle, a stroke crank, a reset spring mechanism and an auxiliary control switch, wherein the rotating shaft is rotatably arranged on a case; and a switch pressing sheet for triggering the auxiliary control switch to disconnect the secondary electric switch-on loop is arranged on the stroke crank arm. The utility model discloses the advantage: once a field worker pulls down and rotates a reclosing retreating end of the reclosing operation handle, the switching-on and switching-off function loses effect, so that the safety of the field worker can be ensured, and safety accidents caused by remote misoperation of a switching-on instruction and execution of an automatic reclosing program of a control terminal are avoided; meanwhile, some cold standby equipment is ensured to be always in a state that the switching-on and switching-off functions cannot be used.
Description
[ technical field ] A method for producing a semiconductor device
The utility model discloses circuit breaker and load switch field on the high-voltage electricity gas post, in particular to circuit breaker and load switch's reclosing lock switching device on outdoor post of high pressure.
[ background of the invention ]
A high-voltage outdoor pole-mounted circuit breaker and a load switch are high-voltage outdoor switch equipment commonly used in a power grid. The circuit breaker and the load switch on the high-voltage outdoor post comprise a solid-sealed pole, a vacuum arc-extinguishing chamber, an operating mechanism, a switching-on/off operating handle and a case, and when the circuit breaker and the load switch are used specifically, the switching-on/off of the circuit breaker can be controlled manually through the switching-on/off operating handle. With the continuous development of science and technology, many high-voltage outdoor pole-mounted circuit breakers and load switches have realized the function of remotely controlling the opening and closing of the circuit breaker through a control terminal. However, the remote control brings convenience and also brings potential safety hazard problems, because the circuit breaker and the load switch on the high-voltage outdoor column need to be installed, overhauled and maintained by someone on site, if someone remotely mistakenly performs electric switching-on operation or starts an automatic reclosing program of the control terminal, site safety accidents are caused; meanwhile, some cold standby high-voltage outdoor column circuit breakers and load switches are not allowed to be directly triggered to operate through a remote control center. In view of the above problems, the present inventors have conducted extensive studies and have made the present invention.
[ Utility model ] content
The to-be-solved technical problem of the utility model lies in providing a circuit breaker and load switch's reclosing switch switching device on high-pressure outdoor post, solves the on-the-spot potential safety hazard problem that circuit breaker and load switch exist at the installation maintenance on the current high-pressure outdoor post.
The utility model discloses a realize like this: a reclosing switching device of a high-voltage outdoor pole-mounted circuit breaker and a load switch comprises a rotating shaft, a reclosing operating handle, a stroke crank arm, a return spring mechanism and an auxiliary control switch, wherein the rotating shaft is rotatably arranged on a case; and the stroke crank arm is provided with a switch pressing sheet for triggering the auxiliary control switch to disconnect the secondary electric switching-on/off loop.
Further, the reset spring mechanism comprises a spring guide plate, a reset spring sleeved on the spring guide plate, a first limiting plate fixedly arranged at one end of the spring guide plate and used for limiting one end of the reset spring, and a second limiting plate clamped at the other end of the spring guide plate and used for limiting the other end of the reset spring; one end of the spring guide plate is rotatably connected with the stroke crank arm through a first limiting plate; the other end of the spring guide plate is rotatably connected with the case through a second limiting plate.
Furthermore, the first limiting plate is rotatably connected with one end of the stroke crank arm through a first fixed pin shaft.
Furthermore, the first fixed pin shaft is fixedly arranged on the first limiting plate, and a first pin shaft hole is formed in one end of the stroke crank arm.
Furthermore, the second limiting plate is rotatably connected with the case through a second fixed pin shaft.
Furthermore, the second fixed pin shaft is fixedly arranged on the case, and a second pin shaft hole is formed in the middle of the second limiting plate.
Furthermore, a movable groove is formed in the other end of the spring guide plate along the length direction, and the second fixed pin shaft penetrates through the movable groove.
Furthermore, the second limiting plate is provided with a clamping groove clamped at the end part of the other end of the spring guide plate.
Furthermore, the other end of the spring guide plate is provided with a first arc-shaped end surface.
Furthermore, the top wall of the clamping groove is provided with a second arc-shaped end face attached to the first arc-shaped end face.
Furthermore, one side of the clamping groove is provided with a first binding surface which is used for binding with the surface of one side of the spring guide plate, and the other side of the clamping groove is provided with a second binding surface which is used for binding with the surface of the other side of the spring guide plate.
Furthermore, the middle part of the stroke crank arm is provided with a shaft hole which is fixedly connected with the rotating shaft.
Furthermore, the other end of the stroke crank arm is provided with a connecting part, and the switch pressing sheet is fixedly arranged on the connecting part.
Furthermore, a first arc-shaped handle is arranged at one end, thrown by the reclosing lock, of the reclosing operating handle.
Furthermore, a reclosing bid identification sign is arranged on the case corresponding to the position of the first arc-shaped handle.
Furthermore, a second arc-shaped handle is arranged at one end, retreating from the reclosing, of the reclosing operating handle.
Furthermore, a reclosing return sign indicating plate is arranged on the case corresponding to the position of the second arc-shaped handle.
The utility model has the advantages that: a reclosing operating handle is arranged at one end of a rotating shaft, the other end of the rotating shaft is connected with a stroke connecting lever, an auxiliary control switch connected to a secondary electric switching-on and switching-off loop is arranged on a case, and a reset spring mechanism is arranged between the stroke connecting lever and the case. When an external force is applied to pull down and rotate the reclosing retreating end of the reclosing operating handle to enable the reset spring mechanism to be located at a second stroke position, the circuit breaker and the load switch on the high-voltage outdoor column are located at a reclosing on/off functional state, the switch pressing sheet on the stroke crank arm triggers the auxiliary control switch to enable the normally closed switch contact of the auxiliary control switch to be disconnected, the normally closed switch contact is connected in series in the secondary electric on/off loop of the circuit breaker, when the auxiliary control switch is located at the reclosing retreating state, the secondary electric on/off loop of the circuit breaker is located at a disconnected state, and at the moment, the circuit breaker loses an on/off function. The utility model discloses a set up the switching device of reclosing lock on circuit breaker and the load switch outside the high pressure outdoor post, once the field work personnel will reclose the "reclosing lock of operating handle moves back" end pull-down rotate to make the reset spring mechanism be in the second stroke position when, the circuit breaker operating mechanism will be in the break-make tripping state, the break-make function will lose the effect too, therefore can ensure field work personnel's safety, guarantee can not lead to the emergence incident because of the automatic reclosing program of remote maloperation combined floodgate instruction and control terminal's execution; meanwhile, the cold standby high-voltage outdoor pole-mounted circuit breakers and load switches are always in a state that the switching-on and switching-off functions cannot be used when the high-voltage outdoor pole-mounted circuit breakers and the load switches are not put into use.
[ description of the drawings ]
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
Fig. 1 is a perspective view of a reclosing switching device of a high-voltage outdoor pole-mounted circuit breaker and a load switch of the present invention;
fig. 2 is a state diagram of a reclosing operation handle when the reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch of the utility model is in reclosing switching;
fig. 3 is a schematic diagram of the positions of the auxiliary control switch and the travel connecting lever when the reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch of the utility model is in reclosing switching;
fig. 4 is a state diagram of the reclosing operation handle when the reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch is in reclosing retreat;
fig. 5 is a schematic diagram of the positions of the auxiliary control switch and the travel connecting lever when the reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch is in reclosing retreat;
fig. 6 is a schematic structural view of the auxiliary control switch, the stroke crank arm and the return spring mechanism when the reclosing mechanism is in the process of retreating;
fig. 7 is a schematic structural diagram of a return spring mechanism in the present invention;
fig. 8 is a schematic structural view of the middle stroke crank arm of the present invention;
fig. 9 is a schematic structural diagram of a second limiting plate according to the present invention;
fig. 10 is an electrical schematic block diagram of a reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch of the present invention.
Description of reference numerals:
1-a case, 11-a second fixed pin shaft, 12-a reclosing bid identification indicator, 13-a reclosing retreat identification indicator, 2-a rotating shaft, 3-a reclosing operation handle, 31-a first arc-shaped handle, 32-a second arc-shaped handle, 4-a travel crank arm, 41-a switch pressing sheet, 42-a first pin shaft hole, 43-a rotating shaft hole, 44-a connecting part, 5-a reset spring mechanism, 51-a spring guide plate, 511-a movable groove, 512-a first arc-shaped end face, 52-a reset spring, 53-a first limiting plate, 531-a first fixed pin shaft, 54-a second limiting plate, 51-a second pin shaft hole, 542-a clamping groove, 5421-a second arc-shaped end face, 5422-a first binding face and 5423-a second binding face, 6-auxiliary control switch.
[ detailed description ] embodiments
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 10, the reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch of the present invention includes a rotating shaft 2 rotatably installed on a case 1, a reclosing operating handle 3 connected to one end of the rotating shaft 2, a stroke crank 4 connected to the other end of the rotating shaft 2, a return spring mechanism 5 connected between the stroke crank 4 and the case 1 and having two stroke positions, and an auxiliary control switch 6 fixedly installed on the case 1 and connected to a secondary electric switching circuit; and a switch pressing sheet 41 for triggering the auxiliary control switch 6 to disconnect the secondary electric switching-on/off loop is arranged on the stroke crank arm 4.
The utility model discloses a set up reclosing lock operating handle 3 in the one end of pivot 2 (when concrete implementation, can pay reclosing lock operating handle 3 in the one end of pivot 2 through preventing that the nut is loose), stroke turning arm 4 is connected to the other end of pivot 2, is equipped with on the quick-witted case 1 and inserts to the auxiliary control switch 6 in secondary electrical switching-on/off return circuit, is equipped with reset spring mechanism 5 between stroke turning arm 4 and the quick-witted case 1. When the high-voltage outdoor column circuit breaker and the load switch are in working, when external force is applied to pull down and rotate the reclosing throw end of the reclosing operating handle 3 to enable the return spring mechanism 5 to be in the first stroke position, the high-voltage outdoor column circuit breaker and the load switch are in a reclosing throw functional state, and in the reclosing throw functional state, the switching-on and switching-off functions of the high-voltage outdoor column circuit breaker and the load switch can be normally used. When an external force is applied to pull down and rotate the reclosing retreat end of the reclosing operating handle 3 to enable the return spring mechanism 5 to be at the second stroke position, the high-voltage outdoor post circuit breaker and the load switch are in the reclosing on/off functional state, the switch pressing sheet 41 on the stroke crank arm 4 triggers the auxiliary control switch 6 to enable the normally closed switch contact of the auxiliary control switch 6 to be disconnected, and as the normally closed switch contact is connected in series in the secondary electrical on/off circuit of the circuit breaker, when the auxiliary control switch 6 is in the reclosing retreat state, the secondary electrical on/off circuit of the circuit breaker is in the disconnected state, and at the moment, the circuit breaker loses the on/off function (as shown in the electrical schematic block diagram of fig. 10, once the normally closed contact 2 of the auxiliary control switch 6 is disconnected, the secondary electrical on/off circuit of the whole circuit breaker is disconnected, therefore, the switching on/off function will not be used). According to the above, the utility model discloses a set up reclosing switching device on high-pressure outdoor post circuit breaker and load switch after, once field worker drop-down rotation to make reset spring mechanism 5 be in the second stroke position with the end "reclosing move back" of reclosing operating handle 3, "the circuit breaker operating mechanism will be in the on-off tripping state, the on-off function will also lose the effect, therefore can ensure field worker's safety, guarantee can not cause the incident because of the automatic reclosing program of remote maloperation switching-on instruction and control terminal's execution; meanwhile, the cold standby high-voltage outdoor pole-mounted circuit breakers and load switches are always in a state that the switching-on and switching-off functions cannot be used when the high-voltage outdoor pole-mounted circuit breakers and the load switches are not put into use.
In this embodiment, the return spring mechanism 5 includes a spring guide plate 51, a return spring 52 sleeved on the spring guide plate 51, a first limit plate 53 fixed to one end of the spring guide plate 51 for limiting one end of the return spring 52, and a second limit plate 54 clamped to the other end of the spring guide plate 51 for limiting the other end of the return spring 52; one end of the spring guide plate 51 is rotatably connected with the stroke crank arm 4 through a first limit plate 53; the other end of the spring guide plate 51 is rotatably connected to the cabinet 1 through a second stopper plate 54. During working, in the process that the stroke crank arm 4 drives the switch pressing sheet 41 to leave the normally closed switch contact of the auxiliary control switch 6, the spring guide plate 51 rotates along with the stroke crank arm 4, and the spring guide plate 51 rotates to a first stroke position under the action of the return spring 52, the first limit plate 53 and the second limit plate 54 and then stops; in the process that the travel crank arm 4 drives the switch pressing sheet 41 to approach and trigger the normally closed switch contact of the auxiliary control switch 6 to be switched off, the spring guide plate 51 rotates along with the travel crank arm 4, and the spring guide plate 51 rotates to the second travel position under the action of the return spring 52, the first limit plate 53 and the second limit plate 54 and then stops.
In this embodiment, in order to realize the rotation of one end of the spring guide plate 51, the first limit plate 53 is rotatably connected to one end of the stroke crank arm 4 by a first fixed pin 531.
In this embodiment, the first fixed pin 531 is fixedly disposed on the first limiting plate 53, a first pin hole 42 is disposed at one end of the stroke crank arm 4, and the rotation function is realized by the cooperation of the first fixed pin 531 and the first pin hole 42.
In this embodiment, in order to realize the rotation of the other end of the spring guide plate 51, the second stopper plate 54 is rotatably connected to the casing 1 by the second fixed pin 11.
In this embodiment, the second fixed pin 11 is fixedly disposed on the chassis 1, the middle portion of the second limiting plate 54 is provided with a second pin hole 541, and the rotation function is realized through the cooperation of the second fixed pin 11 and the second pin hole 541.
In this embodiment, the other end of the spring guide plate 51 is opened with a movable slot 511 along the length direction, and the second fixed pin 11 passes through the movable slot 511. During the process that the stroke crank arm 4 drives the spring guide plate 51 to rotate, the spring guide plate 51 can move and adjust through the movable groove 511.
In this embodiment, the second retainer plate 54 is provided with a catching groove 542 caught to the other end portion of the spring guide plate 51. Through the design of the clamping groove 542, the return spring 52 can be conveniently installed in the spring guide plate 51, and the limit of the return spring 52 can be realized.
In this embodiment, the other end of the spring guide plate 51 has a first circular arc end surface 512.
In this embodiment, the top wall of the retaining groove 542 has a second circular arc-shaped end surface 5421 which is in contact with the first circular arc-shaped end surface 512. Through the cooperation of the first circular arc-shaped end surface 512 and the second circular arc-shaped end surface 5421, a good limiting effect can be achieved, the friction force between the clamping groove 542 and the spring guide plate 51 in the rotating process can be reduced, and the rotation can be better realized.
In this embodiment, one side of the holding groove 542 has a first abutting surface 5422 for abutting against one side surface of the spring guide 51, and the other side of the holding groove 542 has a second abutting surface 5423 for abutting against the other side surface of the spring guide 51. The first joint surface 5422 and the second joint surface 5423 are matched to clamp two sides of the spring guide plate 51 in a joint mode, and therefore the spring guide plate 51 can be stably matched with the stroke crank arm 4 to switch positions.
In the embodiment, in order to facilitate the connection between the stroke crank arm 4 and the rotating shaft 2, a rotating shaft hole 43 for fixedly connecting with the rotating shaft 2 is formed in the middle of the stroke crank arm 4.
In this embodiment, in order to facilitate the arrangement of the switch pressing piece 41, the other end of the stroke crank arm 4 has a connecting portion 44, and the switch pressing piece 41 is fixedly arranged on the connecting portion 44.
In this embodiment, in order to facilitate the rotation of the rotating shaft 2 for switching operation, the reclosing handle 3 is provided with a first arc-shaped handle 31 at one end of the reclosing throw.
In this embodiment, a reclosing bid identification indicator 12 is disposed on the case 1 corresponding to the first arc-shaped handle 31 to indicate a reclosing bid end, so as to prevent a mis-switching situation due to unfamiliarity.
In this embodiment, in order to facilitate the rotation of the rotating shaft 2 for switching operation, the reclosing operating handle 3 is provided with a second arc-shaped handle 32 at one end of the reclosing handle.
In this embodiment, a reclosing retreat sign indicator 13 is disposed on the case 1 corresponding to the second arc-shaped handle 32 to indicate the end of the reclosing retreat, so as to prevent a mis-switching situation due to unfamiliarity.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (17)
1. The utility model provides a high pressure outdoor post is gone up circuit breaker and load switch's reclosing switching device which characterized in that: the device comprises a rotating shaft, a reclosing operating handle, a stroke crank arm, a return spring mechanism and an auxiliary control switch, wherein the rotating shaft is rotatably arranged on a case, the reclosing operating handle is connected with one end of the rotating shaft, the stroke crank arm is connected with the other end of the rotating shaft, the return spring mechanism is connected between the stroke crank arm and the case and is provided with two stroke positions, and the auxiliary control switch is fixedly arranged on the case and is connected to a secondary electric switching-on/off loop; and the stroke crank arm is provided with a switch pressing sheet for triggering the auxiliary control switch to disconnect the secondary electric switching-on/off loop.
2. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 1, wherein: the reset spring mechanism comprises a spring guide plate, a reset spring sleeved on the spring guide plate, a first limiting plate fixedly arranged at one end of the spring guide plate and used for limiting one end of the reset spring, and a second limiting plate clamped at the other end of the spring guide plate and used for limiting the other end of the reset spring; one end of the spring guide plate is rotatably connected with the stroke crank arm through a first limiting plate; the other end of the spring guide plate is rotatably connected with the case through a second limiting plate.
3. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 2, wherein: the first limiting plate is rotatably connected with one end of the stroke crank arm through a first fixed pin shaft.
4. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 3, wherein: the first fixed pin shaft is fixedly arranged on the first limiting plate, and a first pin shaft hole is formed in one end of the stroke crank arm.
5. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 2, wherein: and the second limiting plate is rotatably connected with the case through a second fixed pin shaft.
6. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 5, wherein: the second fixed pin shaft is fixedly arranged on the case, and a second pin shaft hole is formed in the middle of the second limiting plate.
7. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 6, wherein: the other end of the spring guide plate is provided with a movable groove along the length direction, and the second fixed pin shaft penetrates through the movable groove.
8. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 2, wherein: the second limiting plate is provided with a clamping groove clamped at the end part of the other end of the spring guide plate.
9. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 8, wherein: the other end of the spring guide plate is provided with a first arc-shaped end face.
10. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch of claim 9, wherein: the top wall of the clamping groove is provided with a second arc-shaped end face attached to the first arc-shaped end face.
11. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 10, wherein: one side of the clamping groove is provided with a first binding surface which is used for binding with the surface of one side of the spring guide plate, and the other side of the clamping groove is provided with a second binding surface which is used for binding with the surface of the other side of the spring guide plate.
12. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 3, wherein: and the middle part of the stroke crank arm is provided with a shaft hole which is fixedly connected with the rotating shaft.
13. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch of claim 12, wherein: the other end of the travel crank arm is provided with a connecting part, and the switch pressing sheet is fixedly arranged on the connecting part.
14. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch as recited in claim 1, wherein: the reclosing operation handle is provided with a first arc-shaped handle at one end of the reclosing operation handle.
15. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch of claim 14, wherein: and a reclosing bid identification sign is arranged on the case corresponding to the first arc-shaped handle.
16. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and the load switch of claim 15, wherein: and a second arc-shaped handle is arranged at one end of the reclosing operating handle, which is retreated from the reclosing.
17. The reclosing switching device of the high-voltage outdoor pole-mounted circuit breaker and load switch of claim 16, wherein: and a reclosing return sign indicating plate is arranged on the case corresponding to the second arc-shaped handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022868381.9U CN213635834U (en) | 2020-12-03 | 2020-12-03 | Reclosing switching device of high-voltage outdoor pole-mounted circuit breaker and load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022868381.9U CN213635834U (en) | 2020-12-03 | 2020-12-03 | Reclosing switching device of high-voltage outdoor pole-mounted circuit breaker and load switch |
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| Publication Number | Publication Date |
|---|---|
| CN213635834U true CN213635834U (en) | 2021-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022868381.9U Active CN213635834U (en) | 2020-12-03 | 2020-12-03 | Reclosing switching device of high-voltage outdoor pole-mounted circuit breaker and load switch |
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|---|---|
| CN (1) | CN213635834U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114038706A (en) * | 2021-11-10 | 2022-02-11 | 南京海兴电网技术有限公司 | Intelligent isolation type quick circuit breaker |
-
2020
- 2020-12-03 CN CN202022868381.9U patent/CN213635834U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114038706A (en) * | 2021-11-10 | 2022-02-11 | 南京海兴电网技术有限公司 | Intelligent isolation type quick circuit breaker |
| CN114038706B (en) * | 2021-11-10 | 2024-06-11 | 南京海兴电网技术有限公司 | Intelligent isolation type quick breaker |
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