CN111463060A - Isolating circuit breaker - Google Patents
Isolating circuit breaker Download PDFInfo
- Publication number
- CN111463060A CN111463060A CN202010343253.4A CN202010343253A CN111463060A CN 111463060 A CN111463060 A CN 111463060A CN 202010343253 A CN202010343253 A CN 202010343253A CN 111463060 A CN111463060 A CN 111463060A
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- insulator
- movable
- control circuit
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses an isolation breaker, which comprises a top seat, a base, a post insulator and a movable insulator, wherein the top seat is provided with a first hole; one end of the post insulator is fixedly connected with the top seat, and the other end of the post insulator is fixedly connected with the base; one end of the movable insulator is rotatably connected with the base, the other end of the movable insulator is provided with a movable contact, and the movable contact is in mechanical contact connection with a fixed contact arranged on the top seat. The invention realizes the deep fusion of the breaker and the isolating switch, has small integral size, low cost, simple structure and convenient installation, and is particularly suitable for replacing electrical equipment which needs the functions of breaking and isolating at the same time.
Description
Technical Field
The invention relates to high-voltage switch equipment, in particular to an isolating circuit breaker.
Background
The high-voltage switch device is widely applied to the fields of urban power grids, rail transit, high-speed railways, wind power, military industry and the like in China, and mainly has the function of realizing the separation and combination of circuits. The circuit breaker and the isolating switch are commonly used for realizing the opening and closing of the circuit in the field. The circuit breaker is used for dividing and combining load current and fault current, and the isolating switch is used for forming a visible fracture, so that technicians can conveniently confirm that the circuits are separated.
However, the circuit breaker and the disconnecting switch are used at the same time, and the circuit breaker and the disconnecting switch occupy large space together, so that miniaturization and integration are difficult to realize. In addition, the price of the two is added, so that the cost is high and the wide application is difficult. Therefore, at present, the power grid mostly adopts a fuse mode to isolate and segment branch lines. But the fuse has a big problem to segment the branch line, the fuse does not have the remote operation function, the fuse can be restored by manual field operation after falling, the power failure time of a user is increased invisibly, and the workload of operation and maintenance personnel is increased.
Consequently, realize circuit breaker and isolator's integration, the isolation breaker who has circuit breaker and isolator function is concurrently researched and developed for circuit breaker and isolator's function unites two into one, has advantages such as small, with low costs, simple structure, simple to operate simultaneously concurrently, has become expert's in the industry's research focus, for example:
the invention patent with the publication number of CN108878224A provides an isolating circuit breaker, which comprises a device main body, wherein a manual energy storage handle is arranged on one side of the device main body, the manual energy storage handle penetrates through the side face of the device main body, an energy storage pointer is arranged on the outer side face of the device main body, a manual opening and closing handle is arranged at the top of the energy storage pointer, an opening and closing pointer is arranged on one side of the manual opening and closing handle, an isolating knife mechanical interlock is arranged at one end of the opening and closing pointer, an isolating knife operating handle is arranged on the side face of the device main body, a stainless steel plastic spraying box body is arranged at one end of the device main body, and the stainless steel plastic spraying box body is movably connected with the. When the specific embodiment and the attached drawings of the patent are combined, the main body of the patent is a circuit breaker, and one side of the main body of the patent is provided with a disconnecting switch (disconnecting switch), so that the patent is only a simple series combination of the circuit breaker and the disconnecting switch in a traditional mode.
The utility model discloses a utility model patent for CN207166001U provides a high-pressure measurement type boundary switch on post, it includes vertical pole, vertical pole mid portion on the horizontal pole on be equipped with vacuum circuit breaker, vacuum circuit breaker passes through control cable and is connected with the measurement boundary control box that vertical pole divides on the part down, vacuum circuit breaker includes box and three-phase insulation utmost point post, the box is fixed on horizontal pole, three-phase insulation utmost point post is vertical side by side to be fixed on the box, three-phase insulation utmost point post passes through the wire and corresponds with the electric wire netting line on the vertical pole respectively and is connected. When the specific embodiment of the patent and the attached drawings are combined, the patent is still a simple series combination of a traditional circuit breaker and a disconnecting switch.
The utility model discloses a utility model patent with publication number CN209691637U proposes an isolated vacuum circuit breaker who installs mechanical blocking device, and it includes isolator main part, vacuum circuit breaker main part and mechanical blocking device. The mechanical locking device comprises a trigger mechanism, a first transmission mechanism, a blocking mechanism and a limiting piece; the mechanical component mainly comprises a crank arm, a connecting rod, a mandril, a limiting piece and a limit stop; the crank arm and the limit stop are respectively connected with a switching-on and switching-off transmission shaft of the vacuum circuit breaker main body and an operating shaft of the isolating switch main body. The disconnecting switch is connected with the vacuum circuit breaker, and when the vacuum circuit breaker is in a closing state, the disconnecting switch and the transmission mechanism are interlocked, so that the disconnecting switch can be effectively prevented from being triggered by mistake due to the fact that an external environment causes. When the specific embodiment of the patent and the attached drawings are combined, the patent is still a simple series combination of a traditional circuit breaker and a disconnecting switch.
Although the integration of the circuit breaker and the disconnecting switch is a hot spot and a difficult point in the industry, and various research units and manufacturing enterprises have also conducted a great deal of research, the existing research is only to simply connect the circuit breaker and the disconnecting switch in series, and the overall size and the cost of the existing research are not substantially improved. In a word, the existing research does not realize the deep fusion of the circuit breaker and the isolating switch, and does not provide a more compact integrated structure.
Disclosure of Invention
The invention provides an isolation circuit breaker, which aims to solve the problems that the existing circuit breaker and an isolation switch are not deeply fused, and the overall size is large and the cost is high.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an isolation circuit breaker comprises a top seat, a base, a post insulator, a movable insulator, a power taking device, a vacuum arc extinguish chamber, an operating mechanism and a control circuit; the post insulator and the movable insulator are both fixed between the top seat and the base; the base is provided with a metal support, the top seat is provided with a static contact, a rotating shaft is arranged between the bottom of the movable insulator and the metal support, and when the movable insulator rotates outwards around the rotating shaft, the movable contact is separated from the static contact; the control circuit, the operating mechanism, the vacuum arc-extinguishing chamber and the current transformer are arranged in the inner cavity of the movable insulator; the control circuit drives the vacuum arc-extinguishing chamber to be opened and closed through the operating mechanism; when the moving contact and the static contact are not separated and the vacuum arc-extinguishing chamber is in a switching-on state, electrical connection is formed according to the sequence of the footstock, the static contact, the moving contact, the vacuum arc-extinguishing chamber, the rotating shaft, the metal support and the base; a current transformer is arranged on a circuit of the vacuum arc extinguish chamber electrically connected with the moving contact, and the current transformer is electrically connected with a control circuit; the electricity taking device is arranged in the inner cavity of the post insulator, takes electricity from an external high-voltage line and provides power for the control circuit.
Preferably, the electricity taking device comprises a first capacitor and a second capacitor; one end of the first capacitor and one end of the second capacitor after being connected in series are connected with an external high-voltage line, and the other end of the first capacitor is grounded; and a line between the first capacitor and the second capacitor is connected with the control circuit.
Preferably, the electricity taking device comprises a primary coil, a secondary coil and an iron core; the primary coil and the secondary coil are sleeved on the iron core, the primary coil is connected with an external high-voltage line, and the secondary coil is connected with the control circuit.
Preferably, the operating mechanism is a permanent magnet operating mechanism.
Preferably, umbrella skirts are arranged on the outer sides of the post insulator and the movable insulator.
Preferably, an operating ring is arranged on the outer side of the movable insulator.
Preferably, the middle part of the outer side of the post insulator is provided with a mounting bracket.
Preferably, the inner cavities of the post insulator and the movable insulator are filled with insulating gas.
Preferably, a wireless communication module is arranged on the top seat or the base and connected with the control circuit.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an integrated structure integrating isolation and circuit break functions instead of a split and series structure mode of an isolating switch and a circuit breaker. This isolation circuit breaker places movable insulator in with vacuum interrupter in, places post insulator in getting the electric installation in, gets the electric installation and directly gets the electricity from external circuit to for vacuum interrupter divide-shut brake provides electric power support, wireless communication module accessible wireless connection remote control center, it is safer, reliable. The isolating circuit breaker also has the advantages of small size, low cost, simple structure, convenient installation and the like, and is particularly suitable for replacing electrical equipment which needs to be cut off and isolated simultaneously, such as a drop-out fuse, a pole switch and the like.
Drawings
Fig. 1 is a schematic view of a moving contact and a fixed contact of an isolation circuit breaker of the present invention when they are not separated;
FIG. 2 is a schematic diagram of the isolating circuit breaker of the present invention with the moving contact and the stationary contact separated;
fig. 3 is a schematic diagram of the disconnecting circuit breaker of the present invention mounted on a tower.
In the figure, 1-top seat; 2-a base; 3-post insulators; 4-a movable insulator; 5, static contact; 6-moving contact; 7-operating ring; 8-a rotating shaft; 9-a metal support; 10-mounting a bracket; 11-a power taking device; 12-umbrella skirt; 13-a tower; 14-cross arm; 15-incoming side line; 16-line-out side line; 17-a first capacitance; 18-a second capacitance; 41-a vacuum arc-extinguishing chamber; 42-an operating mechanism; 43-a control circuit; 44-current transformer.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, an isolating circuit breaker includes a top base 1, a bottom base 2, a post insulator 3, and a movable insulator 4. One end of the post insulator 3 is fixedly connected with the top seat 1, and the other end is fixedly connected with the base 2. One end of the movable insulator 4 is rotatably connected with the base 2, the other end is provided with a movable contact 6, and the movable contact 6 is in mechanical contact connection with a static contact 5 arranged on the top seat 1.
As shown in fig. 2, when the movable insulator 4 rotates outward, the movable contact 6 separates from the stationary contact 5, forming a visible fracture.
In one embodiment, the base 2 is provided with a metal support 9, the metal support 9 is provided with a rotating shaft 8, and the movable insulator 4 rotates through the rotating shaft 8.
In one embodiment, the post insulator 3 is provided with a shed 12 on the outside thereof so as to maintain the insulation strength with the outside even in a case where the overall size is small. Similarly, the outer side of the movable insulator 4 is also provided with an umbrella skirt 12.
In one embodiment, the mounting bracket 10 is provided at the middle of the outer side of the post insulator 3 so that the disconnecting switch can be integrally mounted.
In one embodiment, an operation ring 7 is arranged on the outer side of the movable insulator 4, and the movable insulator 4 can rotate outwards around one end of the operation ring 7 by pulling, so that the movable contact 6 and the fixed contact 5 are separated, a visible fracture is formed, and the isolating circuit breaker has an isolating switch function.
In one embodiment, the cavity of the movable insulator 4 is provided with a control circuit 43, an operating mechanism 42, a vacuum interrupter 41 and a current transformer 44. One end of the vacuum arc extinguish chamber 41 is electrically connected with the moving contact 6, and the other end is electrically connected with the rotating shaft 8. The control circuit 43 controls the switching on and off states of the vacuum interrupter 41 through the operating mechanism 42. When the moving contact 6 and the static contact 5 are not separated from the vacuum arc-extinguishing chamber 41 and are in a closing state, the moving contact 6, the vacuum arc-extinguishing chamber 41, the rotating shaft 8, the metal support 9 and the base 2 are electrically connected in sequence. The isolation mechanism of the isolating circuit breaker is as follows: when the vacuum arc-extinguishing chamber 41 is in the open state, the electrical connection is disconnected; when the moving contact 6 and the static contact 5 are separated, the electrical connection is further broken and a visible fracture is formed.
In one embodiment, a current transformer 44 is arranged on an electrical connection line between the vacuum interrupter 41 and the movable contact 6, and the current transformer 44 is electrically connected with the control circuit 43. In the design, the current transformer 44 is used for detecting the load current and the fault current and feeding back the load current and the fault current to the control circuit 43, so that the control circuit 43 controls the operating mechanism 42 to drive the vacuum arc-extinguishing chamber 41 to be switched on and off according to different current characteristics.
In one embodiment, a wireless communication module is arranged on the top base 1 or the bottom base 2, the wireless communication module is connected with the control circuit 43, and the control circuit 43 sends information related to the disconnecting circuit breaker to an external control center and receives an operation instruction sent by the external control center through the wireless communication module.
In one embodiment, the control circuit 43 is a single chip or a processor chip, and is configured to receive a current signal detected by the current transformer 44, control switching of the vacuum interrupter 41 through the operating mechanism 42 according to the fed back current signal, and send related electrical information of the disconnecting circuit breaker to an external control center through the wireless communication module and receive an operation instruction sent by the external control center.
In one embodiment, the operating mechanism 42 is a permanent magnet operating mechanism. The permanent magnet operating mechanism is adopted instead of the traditional spring operating mechanism, so that the overall size of the operating mechanism 42 can be ensured to be small, and the overall miniaturization of the isolation circuit breaker can be realized conveniently.
In one embodiment, the internal cavity of the movable insulator 4 is filled with an insulating gas so as to maintain the insulating strength of the interior of the movable insulator 4 even when the movable insulator is small in size as a whole. Insulating gases include, but are not limited to, N2Dry air, CO2、O2、C4F7N、C5F10O、CF3I。
In one embodiment, the power supply device 11 is disposed in the inner cavity of the post insulator 3, and the power supply device 11 supplies power from an external high-voltage line and then supplies power to the control circuit 43. The power-taking device 11 may be a voltage transformer, a capacitive divider, or a ceramic insulator, but is not limited thereto.
In one embodiment, the power taking device 11 includes a first capacitor 17 and a second capacitor 18; one end of the first capacitor 17 and the second capacitor 18 which are connected in series is connected with an external high-voltage line, and the other end of the first capacitor is grounded; the line between the first capacitor 17 and the second capacitor 18 is connected to the control circuit 43. In this design, the first capacitor 17 and the second capacitor 18 are connected in series to divide the ac signal, and assuming that the capacitance values of the first capacitor 17 and the second capacitor 18 are C1 and C2, respectively, and the voltages of the first capacitor 17 and the second capacitor 18 are U1 and U2, respectively, U1 is C2U/(C1 + C2), U2 is C1U/(C1 + C2), that is, U2 is C1U/(C1 + C2), and the power supply voltage provided by the power-taking device 11 to the control circuit 43 is the output voltage.
In one embodiment, the electricity-taking device 11 includes a primary coil, a secondary coil, and a core; the primary coil and the secondary coil are sleeved on the iron core, the primary coil is connected with an external high-voltage line, and the secondary coil is connected with the control circuit 43. In this design, the primary coil and the secondary coil have different numbers of turns, and the high voltage on the high voltage line can be converted into the voltage required by the control circuit 43 through electromagnetic mutual inductance.
In one embodiment, the middle part of the outer side of the post insulator 3 is provided with a low-voltage output interface, and the middle part of the outer side of the movable insulator 4 is provided with a low-voltage input interface; the low-voltage output interface is electrically connected with the power taking device 11, and the low-voltage input interface is electrically connected with the control circuit 43; the low-voltage output interface is electrically connected with the low-voltage input interface through an insulated wire. In this design, the power-taking device 11 takes power from an external high-voltage line, and then is led out from the low-voltage output interface of the post insulator 3 and sent to the low-voltage input interface of the movable insulator 4, so as to supply power to the control circuit 43. A high-strength insulated wire is adopted between the low-voltage output interface and the low-voltage input interface, and the outer layer of the insulated wire is made of resin, plastic, silicon rubber, PVC and polymer composite materials.
In one embodiment, the post insulator 3 is filled with insulating gas in its inner cavity, so that the movable insulator 4 is small in overall sizeThe inside of the lower case still maintains the insulation strength. Insulating gases include, but are not limited to, N2Dry air, CO2、O2、C4F7N、C5F10O、CF3I。
As shown in fig. 3, the disconnecting switch is mounted on a cross arm 14 of a tower 13 through a mounting bracket 10, a top seat 1 of the disconnecting switch is electrically connected with an incoming line side line 15, a bottom seat 2 of the disconnecting switch is electrically connected with an outgoing line side line 16, and the incoming line side line 15 is electrically connected with the outgoing line side line 16 through the disconnecting switch.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (9)
1. An isolating circuit breaker, characterized in that: the device comprises a top seat, a base, a post insulator, a movable insulator, a power taking device, a vacuum arc extinguish chamber, an operating mechanism and a control circuit; the post insulator and the movable insulator are both fixed between the top seat and the base; the base is provided with a metal support, the top seat is provided with a static contact, a rotating shaft is arranged between the bottom of the movable insulator and the metal support, and when the movable insulator rotates outwards around the rotating shaft, the movable contact is separated from the static contact; the control circuit, the operating mechanism, the vacuum arc-extinguishing chamber and the current transformer are arranged in the inner cavity of the movable insulator; the control circuit drives the vacuum arc-extinguishing chamber to be opened and closed through the operating mechanism; when the moving contact and the static contact are not separated and the vacuum arc-extinguishing chamber is in a switching-on state, electrical connection is formed according to the sequence of the footstock, the static contact, the moving contact, the vacuum arc-extinguishing chamber, the rotating shaft, the metal support and the base; a current transformer is arranged on a circuit of the vacuum arc extinguish chamber electrically connected with the moving contact, and the current transformer is electrically connected with a control circuit; the electricity taking device is arranged in the inner cavity of the post insulator, takes electricity from an external high-voltage line and provides power for the control circuit.
2. An isolating circuit breaker according to claim 1, characterized in that: the electricity taking device comprises a first capacitor and a second capacitor; one end of the first capacitor and one end of the second capacitor after being connected in series are connected with an external high-voltage line, and the other end of the first capacitor is grounded; and a line between the first capacitor and the second capacitor is connected with the control circuit.
3. An isolating circuit breaker according to claim 1, characterized in that: the electricity taking device comprises a primary coil, a secondary coil and an iron core; the primary coil and the secondary coil are sleeved on the iron core, the primary coil is connected with an external high-voltage line, and the secondary coil is connected with the control circuit.
4. An isolating circuit breaker according to claim 1, characterized in that: the operating mechanism is a permanent magnet operating mechanism.
5. An isolating circuit breaker according to claim 1, characterized in that: and umbrella skirts are arranged on the outer sides of the post insulators and the movable insulators.
6. An isolating circuit breaker according to claim 1, characterized in that: and an operating ring is arranged on the outer side of the movable insulator.
7. An isolating circuit breaker according to claim 1, characterized in that: and the middle part of the outer side of the post insulator is provided with a mounting bracket.
8. An isolating circuit breaker according to claim 1, characterized in that: and the inner cavities of the post insulator and the movable insulator are filled with insulating gas.
9. An isolating circuit breaker according to claim 1, characterized in that: and the top seat or the base is provided with a wireless communication module, and the wireless communication module is connected with the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343253.4A CN111463060A (en) | 2020-04-27 | 2020-04-27 | Isolating circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010343253.4A CN111463060A (en) | 2020-04-27 | 2020-04-27 | Isolating circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111463060A true CN111463060A (en) | 2020-07-28 |
Family
ID=71681146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010343253.4A Pending CN111463060A (en) | 2020-04-27 | 2020-04-27 | Isolating circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111463060A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111986966A (en) * | 2020-08-13 | 2020-11-24 | 安徽明玑电力设备有限公司 | High-voltage current-limiting fuse |
| 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
- 2020-04-27 CN CN202010343253.4A patent/CN111463060A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111986966A (en) * | 2020-08-13 | 2020-11-24 | 安徽明玑电力设备有限公司 | High-voltage current-limiting fuse |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106253120B (en) | A kind of solid insulation switch for integrating breaker and disconnecting switch | |
| CN101329964B (en) | Non-SF6 gas insulative outdoor high voltage vacuum breaker | |
| CN102684100A (en) | Vacuum type high-pressure combined electric apparatus | |
| CN201956268U (en) | Indoor solid-sealed type high-voltage vacuum circuit breaker | |
| CN111463060A (en) | Isolating circuit breaker | |
| CN203573896U (en) | Outdoor high-voltage permanent magnet vacuum circuit breaker | |
| CN201060794Y (en) | Vacuum breaker | |
| CN201498869U (en) | Vacuum ring main unit | |
| CN102280300A (en) | Touchable high-voltage breaker | |
| CN203733697U (en) | Vacuum circuit breaker for switching capacitor bank gas insulated switch cabinet | |
| CN212874327U (en) | Isolating circuit breaker | |
| CN202042412U (en) | Touchable high-voltage circuit breaker | |
| CN104143451B (en) | High-speed earthing switch and earthing switch assembly unit with same | |
| CN201904561U (en) | Environment-friendly solid fully-insulated looped network cabinet | |
| CN204835350U (en) | Epoxy resin cast solid insulation cubical switchboard | |
| CN103700539A (en) | Vacuum circuit breaker for switching capacitor bank gas insulated switch cabinet | |
| CN219591317U (en) | 72.5kV combined electrical apparatus for wind power | |
| CN203225200U (en) | Environment-friendly intelligent two-in-one outdoor on-pole vacuum circuit breaker | |
| CN203339095U (en) | Vacuum circuit breaker and load switch | |
| CN206640195U (en) | One kind is without isolated switchgear under bin static contact non-SF 6 gas insulative | |
| CN104882320B (en) | A kind of on-load switch | |
| CN206225875U (en) | A kind of solid insulated switchgear | |
| CN205921290U (en) | Collection circuit breaker and isolator solid insulation switch as an organic whole | |
| CN203931920U (en) | A kind of vacuum switch unit | |
| CN203312687U (en) | Flame-proof and intrinsically-safe-type high-voltage vacuum power distribution equipment used for mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |