CN211088149U - One-time and two-time integrated on-column circuit breaker - Google Patents
One-time and two-time integrated on-column circuit breaker Download PDFInfo
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- CN211088149U CN211088149U CN201922129435.7U CN201922129435U CN211088149U CN 211088149 U CN211088149 U CN 211088149U CN 201922129435 U CN201922129435 U CN 201922129435U CN 211088149 U CN211088149 U CN 211088149U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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Abstract
The utility model provides a circuit breaker on post is fused to one secondary, including the casing, the casing left and right sides is equipped with moving contact and static contact respectively, fixedly connected with main shaft on the moving contact, the main shaft is connected with drive mechanism, drive mechanism is connected with operating device, the casing inner wall is equipped with electronic transformer, electronic transformer one end is connected with the conducting rod, the electronic transformer other end is connected with the aviation plug that is located the mechanism cover, the aviation plug is connected with the control terminal in the mechanism cover, control terminal is equipped with 4G wireless communication, RS232 and RJ45 communication interface; the circuit breaker does not depend on a distribution automation main station and communication, realizes the function of self-adaptive comprehensive type on-site automation, has light weight and simple installation procedure, and does not have the high-voltage risk caused by the open circuit of the secondary side of a current transformer.
Description
Technical Field
The utility model relates to a circuit breaker technical field, in particular to circuit breaker on one secondary fuses complete set post.
Background
The circuit breaker is the most important control equipment in the power system and plays a dual role of protection and control. On the one hand, the load current is switched on and off under normal conditions, so that the operation mode of the power grid is changed; on the other hand, when the power grid fails, the short-circuit current is cut off rapidly, and the fault is isolated, so that normal operation of non-fault equipment is guaranteed.
The pole-mounted circuit breaker is a circuit breaker installed and operated on an electric pole and is commonly used on a communication, section and branch line in a power grid so as to improve the power supply reliability of the power grid. At present, the function of remote signalling, telemetering measurement, remote control, remote regulation is realized to the last one-level main website of generally dependence on the circuit of place to the circuit breaker on post, because reasons such as the distance is far away between mutual-inductor and the main website, main website equipment is ageing, the overheated of switch, the communication interrupt easily appears between circuit breaker on post and the main website to lead to the main website to lose the control to the circuit breaker on the post.
Moreover, because the pole-mounted circuit breaker is heavy, the installation and fixing procedures are complicated, and the installation position is generally high, the efficiency of installers in the ascending operation of the pole-mounted circuit breaker is low, and the personal casualty risk is high. In addition, the in-process of circuit breaker on the erection column, because the high altitude construction is difficult for guardianship, if the mistake bumps or the misconnection appears and lead to current transformer secondary to open a way, then current transformer can produce very high voltage because of electromagnetic induction, threatens installer's personal safety.
Therefore, the pole-mounted circuit breaker which is automatically monitored on site, is light in weight, is simple in installation process and does not have high-voltage risk caused by open circuit of the secondary side of the current transformer is urgent to be researched and developed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of current research, the utility model provides a circuit breaker on complete set post is fused to a secondary, reasonable in design, simple structure is ingenious, does not rely on distribution automation main website and communication, realizes "self-adaptation generalized type automation on the spot" function, and light in weight, installation simple, no current transformer secondary side are opened a way and are leaded to the high-voltage risk. In order to achieve the above-mentioned functions, the above technical problems of the present invention can be solved mainly by the following technical solutions:
the utility model provides a circuit breaker on secondary fusion complete set post, which comprises a housin, casing rear side fixedly connected with mechanism cover, the casing left and right sides is equipped with moving contact and static contact respectively, fixedly connected with main shaft on the moving contact, moving contact and static contact are connected with the wiring board through the conducting rod respectively, the moving contact, the static contact is fixed respectively outward and has cup jointed the vase, the vase passes through flange and casing outer wall fixed connection, the main shaft is connected with drive mechanism, drive mechanism is connected with operating device, shells inner wall is equipped with electronic transformer, electronic transformer one end is connected with the conducting rod, the electronic transformer other end is connected with the aviation plug that is located the mechanism cover, the aviation plug is connected with the control terminal who constructs the cover, control terminal is equipped with 4G wireless communication, RS232 and RJ45 communication interface.
Furthermore, the high voltage and the low voltage of the electronic transformer are connected in a resistance-capacitance voltage division mode.
Further, the electronic transformer comprises a phase current transformer, a zero sequence current transformer and a voltage sensor. The phase current transformer collects the phase current of the line, the zero sequence current transformer collects the zero sequence current of the line, and the voltage sensor collects the three-phase voltage and the unbalanced current of the line.
Furthermore, the number of the phase current transformers is three, the number of the zero sequence current transformers is one, and the phase current transformers and the zero sequence current transformers are fixed on the inner wall of the shell through pressing plates, bolts, nuts and washers.
Furthermore, the number of the voltage sensors is three, and the voltage sensors are fixed at the bottom in the shell.
Further, the fixed installing support that is provided with in casing bottom, the installing support includes the horizontal stand, the horizontal stand is two long angle steel and two short angle steel welded fastening's rectangle structure that forms, the short angle steel of rectangle structure one side passes through "U" type staple bolt and bracing piece fixed connection.
Furthermore, an adsorption cover is arranged in the shell, and an adsorbent is arranged in the adsorption cover. The adsorbent absorbs moisture in the arc extinguishing medium sulfur hexafluoride gas in the housing and toxic decomposition products generated by the action of the electric arc.
Furthermore, an opening and closing indicating pointer, an energy storage handle and a manual opening and closing handle are arranged on the outer side of the mechanism cover, and the opening and closing indicating pointer is fixedly connected with the transmission mechanism. In the opening and closing process of the circuit breaker, an opening and closing indicating pointer fixedly connected with the transmission mechanism rotates along with the circuit breaker, and when the circuit breaker is opened in place, the opening and closing indicating pointer points to the opening position; when the circuit breaker is switched on in place, the switching-on and switching-off indicating pointer points to the switching-on position. When the energy storage loop has a fault and the breaker cannot store energy electrically, the energy storage handle can be used for storing energy manually; when power is off and the electric quantity of the storage battery is used up, the manual opening and closing handle can be used for manually opening and closing the circuit breaker.
Further, a low-pressure locking device and a manual locking switch are arranged in the mechanism cover. The storage battery provides electric energy for the breaker opening and closing motor after power failure, and the opening and closing operation can be still carried out for 3 times after power failure; when the pressure of arc extinguishing gas in the shell is lower than a locking value, the low-pressure locking device locks a control loop of the circuit breaker, and the circuit breaker cannot be opened or closed; when the controller needs to be replaced under the condition that the line is loaded, the manual locking switch is pressed down to lock the circuit breaker control loop, and the situation that the safety of workers is threatened due to the action of the circuit breaker when the controller is replaced is prevented.
Further, a surge controller is arranged in the mechanism cover. When surge current is formed on the line, the inrush current controller delays the action of the circuit breaker to prevent the circuit breaker from being mistakenly operated due to the surge current on the line.
The high-voltage side of the electronic transformer is connected with the conducting rod and used for collecting primary analog quantity of the line, wherein the phase current transformer is used for collecting three-phase current analog quantity of the line, the zero-sequence current transformer is used for collecting zero-sequence current analog quantity of the line, and the voltage sensor is used for collecting three-phase voltage and unbalanced voltage of the line; because the high voltage and the low voltage of the electronic mutual inductance are connected in a resistance-capacitance voltage division mode, the low voltage side of the electronic mutual inductor obtains a secondary analog quantity which is in a fixed ratio with the primary analog quantity in a shunting or voltage division mode, and therefore the measurement of phase current, zero sequence current, phase voltage and unbalanced voltage of a line is completed;
the low-voltage side of the electronic transformer is connected with the aviation plug, and when the aviation plug is plugged, phase current, zero sequence current, phase voltage and unbalanced voltage which are measured by the electronic transformer are transmitted to the control terminal through a lead;
the control terminal judges the line and fault type of the fault through short circuit and earth fault detection technology, non-voltage brake opening, fault path self-adaptive delay incoming call closing and other control logics, and sends a control signal of breaker tripping and a control signal of breaker closing according to the fault line and fault type; the on-site line selection, the area positioning and the isolation of the single-phase earth fault are realized through the time coordination sent by the control signal;
when a tripping control signal is sent out, a motor loop of the circuit breaker is conducted, the motor starts to rotate, the main shaft is driven to move through the transmission mechanism, the main shaft moves to drive the movable contact to move leftwards, the movable contact and the static contact are separated, discharge occurs between the movable contact and the static contact and an electric arc is formed due to the fact that a relative voltage difference exists after the movable contact and the static contact are separated, the current between the movable contact and the static contact is reduced along with the distance of the positions of the movable contact and the static contact, when the current is close to 0, the temperature and the pressure of the electric arc between the movable contact and the static contact are sharply reduced, the electric arc cannot be maintained and extinguished, the movable contact is separated from the static contact, two sides of the movable contact and the static contact are; the process when the closing control signal is sent out is opposite to the process.
The beneficial effects of the utility model.
1. The utility model discloses this kind of circuit breaker on secondary fusion post, the communication that does not rely on between main website and the circuit breaker on the post, can realize self-adaptation generalized type automation on the spot, through short circuit and earth fault detection technique, control logic such as non-pressure separating brake, trouble route self-adaptation time delay incoming telegram combined floodgate realizes single-phase earth fault's line selection on the spot, regional location and isolation.
2. The horizontal bracket in the mounting bracket of the secondary fusion on-column circuit breaker adopts the rectangular structure modular design, so that the structure is stable and the strength is good; fix the horizontal stand on the bracing piece through "U" type staple bolt, simplified the installation procedure of circuit breaker on the post greatly, improved the installation effectiveness, reduced the construction volume to the holistic structural strength of installing support has been ensured.
3. The utility model discloses a circuit breaker on secondary fusion post adopts the resistance-capacitance partial pressure mode to insert between electronic transformer's high pressure, the low pressure side, keeps apart the high pressure of mutual-inductor, low pressure electromagnetism, and insulating properties is good, the degree of safety is high, anti-electromagnetic interference ability is strong.
4. The utility model discloses an electronic transformer among the circuit breaker on this kind of secondary fusion post does not have the iron core, and the weight reduces for electromagnetic type mutual-inductor weight by a wide margin, has complied with the national grid one secondary and has fused the complete set requirement.
5. The utility model discloses an electronic transformer among circuit breaker on this kind of secondary fusion post has overcome the difficult problem that electromagnetic transformer measuring range is little, the easy saturation of iron core, and same electronic transformer can satisfy the sampling requirement of measuring, measurement, protection simultaneously, has reduced the use amount of mutual-inductor.
6. The utility model discloses a circuit breaker on secondary fusion post, measurement accuracy is high, the frequency response scope is wide, and electronic transformer can measure harmonic on the high-voltage line, still can measure transient state electric current, high frequency heavy current and direct current.
7. The utility model discloses this kind of electronic transformer satisfies the needs of measuring, measurement, protection in the circuit breaker on the post is fused to a secondary, not only measurable quantity phase current, looks voltage, but also measurable quantity zero sequence current and unbalanced voltage, and the analog quantity is complete, can accurately judge the various trouble of circuit moreover.
8. The utility model discloses a circuit breaker is furnished with national net and prevents opening a way navigation plug on this kind of a secondary fusion post, can change the controller under the circuit load condition to can conveniently carry out control terminal protection measurement and control procedure upgrading and decide the school through 4G wireless communication, RS232 and RJ45 communication interface.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic front view of the circuit breaker of the present invention;
fig. 2 is a schematic rear view of the circuit breaker of the secondary fusion set column of the present invention;
fig. 3 is a schematic left-view diagram of the circuit breaker of the secondary fusion complete set column of the present invention;
fig. 4 is a left side view schematically illustrating the secondary fusion complete set column upper circuit breaker of the present invention mounted on the support rod;
fig. 5 is a schematic view of the middle horizontal bracket, the U-shaped hoop and the support rod of the present invention.
In the figure: 1. a housing; 2. a mechanism cover; 3. a moving contact; 4. static contact; 5. a conductive rod; 6. a wiring board; 7. A porcelain bottle; 8. aerial plug; 9. a phase current transformer; 10. a zero sequence current transformer; 11. a voltage sensor; 12. pressing a plate; 13. Switching-on and switching-off indicating pointers; 14. an adsorption cover; 15. an adsorbent; 16. an inrush current controller; 17. an energy storage handle; 18. a manual brake opening and closing handle; 19. a flange; 20. a main shaft; 21. a manual latching switch; 22. a low pressure lockout device; 23. mounting a bracket; 23-1, long angle steel; 23-2, short angle steel; 24. a U-shaped hoop; 25. a support rod.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
As shown in fig. 1-5, the secondary fusion column-mounted circuit breaker in this embodiment includes a housing 1, a mechanism cover 2 is fixedly connected to a rear side of the housing 1, a moving contact 3 and a static contact 4 are respectively disposed on left and right sides of the housing 1, a main shaft 20 is fixedly connected to the moving contact 3, the moving contact 3 and the static contact 4 are respectively connected to a wiring board 6 through a conductive rod 5, porcelain bottles 7 are respectively and fixedly sleeved outside the moving contact 3 and the static contact 4, the porcelain bottles 7 are fixedly connected to an outer wall of the housing 1 through flanges 19, the main shaft 20 is connected to a transmission mechanism, the transmission mechanism is connected to an operating mechanism, an electronic transformer is disposed on an inner wall of the housing 1, one end of the electronic transformer is connected to the conductive rod 5, the other end of the electronic transformer is connected to an aerial plug 8 disposed on the mechanism cover 2, the aerial plug 8 is connected to, RS232 and RJ45 communication interfaces.
The high voltage and the low voltage of the electronic transformer are connected in a resistance-capacitance voltage division mode.
The electronic transformer comprises a phase current transformer 9, a zero sequence current transformer 10 and a voltage sensor 11.
The number of the phase current transformers 9 is three, the number of the zero sequence current transformers 10 is one, and the phase current transformers 9 and the zero sequence current transformers 10 are fixed on the inner wall of the shell 1 through pressing plates 12, bolts, nuts and washers.
The number of the voltage sensors 11 is three, and the voltage sensors 11 are fixed at the bottom in the shell 1.
The bottom of the shell 1 is fixedly provided with a mounting bracket, the mounting bracket comprises a horizontal bracket 23, the horizontal bracket 23 is a rectangular structure formed by welding and fixing two long angle steels 23-1 and two short angle steels 23-2, and the short angle steel 23-2 on one side of the rectangular structure is fixedly connected with a support rod 25 through a U-shaped hoop 24.
An adsorption cover 14 is provided in the housing 1, and an adsorbent 15 is provided in the adsorption cover 14.
And an opening and closing indicating pointer 13, an energy storage handle 17 and a manual opening and closing handle 18 are arranged on the outer side of the mechanism cover 2, and the opening and closing indicating pointer 13 is fixedly connected with the transmission mechanism.
A low-pressure lock device 22 and a manual lock switch 21 are provided in the mechanism cover 2.
A surge controller 16 is also provided in the mechanism cover 2.
The utility model discloses a theory of operation and process.
The high-voltage side of the electronic transformer connected with the conducting rod 5 acquires primary analog quantity of a line, wherein a phase current transformer 9 acquires three-phase current analog quantity of the line, a zero sequence current transformer 10 acquires zero sequence current analog quantity of the line, and a voltage sensor 11 acquires three-phase voltage and unbalanced voltage of the line; because the high voltage and the low voltage of the electronic transformer are connected in a resistance-capacitance voltage division mode, the low voltage side of the electronic transformer obtains a secondary analog quantity which is in a fixed ratio with the primary analog quantity in a shunting or voltage division mode, and therefore the measurement of phase current, zero sequence current, phase voltage and unbalanced voltage of a line is completed;
the low-voltage side of the electronic transformer is connected with the aviation plug 8, and when the aviation plug 8 is plugged, phase current, zero sequence current, phase voltage and unbalanced voltage which are measured by the electronic transformer are transmitted to the control terminal through a lead;
the control terminal judges the line and fault type of the fault through short circuit and earth fault detection technology, non-voltage brake opening, fault path self-adaptive delay incoming call closing and other control logics, and sends a control signal of breaker tripping and a control signal of breaker closing according to the fault line and fault type; the on-site line selection, the area positioning and the isolation of the single-phase earth fault are realized through the time coordination sent by the control signal;
when a tripping control signal is sent out, a motor loop of the circuit breaker is conducted, the motor starts to rotate, the main shaft 20 is driven to move through the transmission mechanism, the main shaft 20 moves to drive the movable contact 3 to move leftwards, the movable contact 3 and the fixed contact 4 are separated, discharge is generated between the movable contact 3 and the fixed contact 4 and an electric arc is formed due to the fact that a relative voltage difference exists after the movable contact 3 and the fixed contact 4 are separated, the current between the movable contact 3 and the fixed contact 4 is reduced along with the distance of the positions of the movable contact 3 and the fixed contact 4, when the current is close to 0, the temperature and the pressure of the electric arc between the movable contact and the fixed contact 4 are sharply reduced, the electric arc cannot be maintained and is extinguished, the movable contact 3 is separated from the fixed contact 4, the two sides of the movable contact 3 and the fixed; the process when the closing control signal is sent out is opposite to the process.
The primary and secondary on-pole integrated circuit breaker can realize self-adaptive comprehensive on-site automation without depending on communication between a main station and the on-pole circuit breaker, and realizes on-site line selection, area positioning and isolation of single-phase earth faults through short circuit and earth fault detection technologies, non-voltage brake separation, fault path self-adaptive delay incoming switch-on and other control logics.
According to the primary and secondary fusion pole-mounted circuit breaker, the horizontal bracket 23 in the mounting bracket of the pole-mounted circuit breaker adopts a rectangular structure modular design, so that the structure is stable and the strength is good; the horizontal support 23 is fixed on the support rod 25 through the U-shaped hoop 24, so that the installation procedure of the pole-mounted circuit breaker is greatly simplified, the installation efficiency is improved, the construction amount is reduced, and the integral structural strength of the installation support is ensured.
According to the primary and secondary fused pole-mounted circuit breaker, the high-voltage side and the low-voltage side of the electronic transformer are connected in a resistance-capacitance voltage division mode, the high voltage and the low voltage of the transformer are isolated electromagnetically, and the secondary fused pole-mounted circuit breaker is good in insulating property, high in safety and strong in anti-electromagnetic interference capability.
The electronic transformer in the breaker on the primary and secondary fusion column has no iron core, the weight is greatly reduced relative to the weight of an electromagnetic transformer, and the requirement of a national network primary and secondary fusion set is met.
The electronic transformer in the breaker on the primary and secondary fusion column overcomes the problems of small measurement range and easy saturation of an iron core of an electromagnetic transformer, and the same electronic transformer can simultaneously meet the sampling requirements of measurement, metering and protection, thereby reducing the usage amount of the transformer.
The breaker on the first-second fusion column has high measurement precision and wide frequency response range, and the electronic transformer can measure harmonic waves on a high-voltage line and can also measure transient current, high-frequency large current and direct current.
The electronic mutual inductor in the primary and secondary fused pole-mounted circuit breaker meets the requirements of measurement, metering and protection, not only can measure phase current and phase voltage, but also can measure zero-sequence current and unbalanced voltage, has complete analog quantity, and can accurately judge various faults of a circuit.
The breaker on the primary and secondary fusion column is provided with a national network anti-open-circuit aerial socket 8, a controller can be replaced under the condition of line load, and the upgrade and calibration of a control terminal protection measurement and control program can be conveniently carried out through 4G wireless communication, RS232 and RJ45 communication interfaces.
While the invention has been shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.
Claims (10)
1. The utility model provides a circuit breaker on secondary fusion suit post, includes casing (1), casing (1) rear side fixedly connected with mechanism cover (2), the casing (1) left and right sides is equipped with moving contact (3) and static contact (4) respectively, fixedly connected with main shaft (20) on moving contact (3), moving contact (3) and static contact (4) are connected with wiring board (6) through conducting rod (5) respectively, moving contact (3), static contact (4) are fixed respectively outward and have been cup jointed vase (7), vase (7) are through flange (19) and casing (1) outer wall fixed connection, main shaft (20) are connected with drive mechanism, drive mechanism is connected with operating device, its characterized in that: casing (1) inner wall is equipped with electronic transformer, electronic transformer one end is connected with conducting rod (5), the electronic transformer other end with be located mechanism cover (2) on insert (8) and be connected, insert (8) and be connected with the control terminal in mechanism cover (2) by plane, control terminal is equipped with 4G wireless communication, RS232 and RJ45 communication interface.
2. A secondary fused set pole top circuit breaker according to claim 1, wherein: and the high voltage and the low voltage of the electronic transformer are connected in a resistance-capacitance voltage division mode.
3. A secondary fused set pole top circuit breaker according to claim 1, wherein: the electronic transformer comprises a phase current transformer (9), a zero sequence current transformer (10) and a voltage sensor (11).
4. A secondary fused set pole top breaker as claimed in claim 3, wherein: the phase current transformers (9) are three in number, the zero sequence current transformers (10) are one in number, and the phase current transformers (9) and the zero sequence current transformers (10) are fixed on the inner wall of the shell (1) through pressing plates (12), bolts, nuts and washers.
5. A secondary fused set pole top breaker as claimed in claim 3, wherein: the number of the voltage sensors (11) is three, and the voltage sensors (11) are fixed at the bottom in the shell (1).
6. A secondary fused set pole top circuit breaker according to claim 1, wherein: the novel support is characterized in that a mounting support is fixedly arranged at the bottom of the shell (1), the mounting support comprises a horizontal support (23), the horizontal support (23) is a rectangular structure formed by fixedly welding two long angle steels (23-1) and two short angle steels (23-2), and the short angle steels (23-2) on one side of the rectangular structure are fixedly connected with a support rod (25) through a U-shaped hoop (24).
7. A secondary fused set pole top circuit breaker according to claim 1, wherein: an adsorption cover (14) is arranged in the shell (1), and an adsorbent (15) is arranged in the adsorption cover (14).
8. A secondary fused set pole top circuit breaker according to claim 1, wherein: and a switching-on and switching-off indicating pointer (13), an energy storage handle (17) and a manual switching-on and switching-off handle (18) are arranged on the outer side of the mechanism cover (2), and the switching-on and switching-off indicating pointer (13) is fixedly connected with the transmission mechanism.
9. A secondary fused set pole top circuit breaker according to claim 1, wherein: a low-pressure locking device (22) and a manual locking switch (21) are arranged in the mechanism cover (2).
10. A secondary fused set pole top circuit breaker according to claim 1, wherein: and a current inrush controller (16) is also arranged in the mechanism cover (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922129435.7U CN211088149U (en) | 2019-12-02 | 2019-12-02 | One-time and two-time integrated on-column circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922129435.7U CN211088149U (en) | 2019-12-02 | 2019-12-02 | One-time and two-time integrated on-column circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211088149U true CN211088149U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922129435.7U Active CN211088149U (en) | 2019-12-02 | 2019-12-02 | One-time and two-time integrated on-column circuit breaker |
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| Country | Link |
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| CN (1) | CN211088149U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112614750A (en) * | 2020-12-07 | 2021-04-06 | 国网上海市电力公司 | Pole-mounted circuit breaker |
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2019
- 2019-12-02 CN CN201922129435.7U patent/CN211088149U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112614750A (en) * | 2020-12-07 | 2021-04-06 | 国网上海市电力公司 | Pole-mounted circuit breaker |
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