CN211266245U - Medium-voltage switch cabinet using main loop for phase change - Google Patents
Medium-voltage switch cabinet using main loop for phase change Download PDFInfo
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- CN211266245U CN211266245U CN201921662944.XU CN201921662944U CN211266245U CN 211266245 U CN211266245 U CN 211266245U CN 201921662944 U CN201921662944 U CN 201921662944U CN 211266245 U CN211266245 U CN 211266245U
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Abstract
The utility model is suitable for a medium voltage switchgear technical field provides a use medium voltage switchgear of main circuit commutation, including shell subassembly and return circuit subassembly, the shell subassembly includes bottom plate, generating line room, shell, circuit breaker handcart room, relay instrument room and cable chamber, bottom plate, generating line room, circuit breaker handcart room; after the phase change of the main circuit adopts the five-pole vacuum contactor, the main circuit of each phase is connected in series by two vacuum tubes, therefore, if a leakage condition occurs to a certain vacuum tube in the main vacuum contactor, the auxiliary vacuum contactor is in a good state, the problem of short circuit of the main circuit when the leakage condition occurs to a certain vacuum tube of the vacuum contactor in the phase sequence switching process is solved, the probability of occurrence of accidents is reduced, and the main vacuum contactor and the auxiliary vacuum contactor are installed in a standard medium-voltage switch cabinet, can be used in parallel with the standard medium-voltage switch cabinet, and are simple, convenient and quick to install.
Description
Technical Field
The utility model belongs to the technical field of the medium voltage switchgear, especially, relate to a use medium voltage switchgear of main circuit commutation.
Background
The switch cabinet is an electric device, the outside line of the switch cabinet firstly enters a main control switch in the cabinet and then enters a branch control switch, each branch circuit is arranged according to the requirement, such as an instrument, an automatic control, a motor magnetic switch, various alternating current contactors and the like, some switch cabinets are also provided with a high-voltage chamber and a low-voltage chamber, high-voltage buses are arranged, such as a power plant and the like, and some switch cabinets are also provided with low-frequency load shedding for protecting main equipment.
The medium voltage switch cabinet main loop power supply switching phase sequence technology in the current market mainly adopts a three-pole vacuum contactor or a vacuum circuit breaker to realize, and in the operation process of a switch cabinet, if a certain vacuum tube in the vacuum contactor or the vacuum circuit breaker has a leakage condition, the main loop short circuit condition can occur in the process of switching the phase sequence, so that accidents such as power failure of the main loop, equipment burnout, personal injury and the like can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides an use medium voltage switchgear of major loop commutation aims at solving medium voltage switchgear major loop power switching phase sequence technique in the existing market, mainly adopts tripolar vacuum contactor or vacuum circuit breaker to realize, at the cubical switchboard operation in-process, if the leakage condition appears in certain vacuum tube among vacuum contactor or the vacuum circuit breaker, the major loop short circuit condition will appear switching phase sequence's in-process, will lead to the problem of accidents such as major loop power failure, equipment burnout, personal injury.
The utility model discloses a realize like this, a use medium voltage switch cabinet of main loop commutation, including shell subassembly and return circuit subassembly, the shell subassembly includes bottom plate, generating line room, shell, circuit breaker handcart room, relay instrument room and cable chamber, bottom plate, generating line room, circuit breaker handcart room, relay instrument room and cable chamber all fixed connection in the shell, the bottom plate is located the bottom of shell, the cable chamber is located the top of bottom plate, circuit breaker handcart room is located the top of cable chamber, relay instrument room is located the top of circuit breaker handcart room, the generating line room is located the right side of relay instrument room, the return circuit subassembly includes main vacuum contactor, arrester, isolator, circuit breaker handcart, bus sleeve, branch bus, main bus and vice vacuum contactor, the arrester fixed connection in the bottom plate, the arrester is located the top of bottom plate, the equal fixed connection of main vacuum contactor and vice vacuum contactor in inside the cable chamber, isolator fixed connection in the bus-bar room, isolator is located the below of bus-bar room, circuit breaker handcart fixed connection in circuit breaker handcart room, the circuit breaker handcart is located the inside of circuit breaker handcart room, bus-bar sleeve fixed connection in the bus-bar room, the bus-bar sleeve is located the inside of bus-bar room, the main bus-bar is fixed in bus-bar sheathed tube inboard, branch bus-bar is fixed in the bus-bar sheathed tube outside.
Preferably, the number of the main vacuum contactors is five, and five main vacuum contactors are equidistantly distributed.
Preferably, the number of the auxiliary vacuum contactors is five, and five auxiliary vacuum contactors are equidistantly distributed.
Preferably, the number of the isolating switches is two, and a certain gap is arranged between the two isolating switches.
Preferably, the number of the bus sleeve, the branch bus and the main bus is three, three groups of the bus sleeve, the branch bus and the main bus are distributed at equal intervals, two of the main buses are electrically connected to one of the isolating switches, and the other main bus is connected to the other isolating switch through a cable.
Preferably, the main vacuum contactor and the auxiliary vacuum contactor are installed face to face, and an electrical and mechanical interlock is arranged between the main vacuum contactor and the auxiliary vacuum contactor.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses an use medium voltage switchgear of main loop commutation avoids main loop short circuit condition can appear in the in-process of switching the phase sequence through setting up main vacuum contactor and vice vacuum contactor, main vacuum contactor and vice vacuum contactor are five utmost point vacuum contactor, main loop commutation adopts behind five utmost point vacuum contactor, has realized that every looks main loop is established ties by two vacuum tubes, consequently, if certain vacuum tube in the main vacuum contactor appears the leakage condition, in addition vice vacuum contactor is in intact state, has solved the condition of main loop short circuit when certain vacuum tube of vacuum contactor appears the leakage condition in the in-process of switching the phase sequence, has reduced the probability that the accident took place, main vacuum contactor and vice vacuum contactor install in standard medium voltage switchgear, can use with standard medium voltage switchgear side by side, the installation is simple and convenient and fast.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a main vacuum contactor according to the present invention;
fig. 3 is a schematic view of the back view structure of the present invention;
in the figure: 1-shell component, 11-bottom plate, 12-bus chamber, 13-shell, 14-breaker handcart chamber, 15-relay instrument chamber, 16-cable chamber, 2-loop component, 21-main vacuum contactor, 22-lightning arrester, 23-isolating switch, 24-breaker handcart, 25-bus sleeve, 26-branch bus, 27-main bus and 28-auxiliary vacuum contactor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1-3, the present invention provides a technical solution: a medium voltage switch cabinet using a main loop for commutation comprises a shell assembly 1 and a loop assembly 2, wherein the shell assembly 1 comprises a bottom plate 11, a bus chamber 12, a shell 13, a breaker handcart chamber 14, a relay instrument chamber 15 and a cable chamber 16, the bottom plate 11, the bus chamber 12, the breaker handcart chamber 14, the relay instrument chamber 15 and the cable chamber 16 are all fixedly connected to the shell 13, the bottom plate 11 is positioned at the bottom of the shell 13, the cable chamber 16 is positioned above the bottom plate 11, the breaker handcart chamber 14 is positioned above the cable chamber 16, the relay instrument chamber 15 is positioned above the breaker handcart chamber 14, the bus chamber 12 is positioned at the right side of the relay instrument chamber 15, the loop assembly 2 comprises a main vacuum contactor 21, a lightning arrester 22, an isolating switch 23, a breaker handcart 24, a bus sleeve 25, a branch bus 26, a main bus 27 and an auxiliary vacuum contactor 28, the lightning arrester 22 is fixedly connected to the bottom plate 11, the lightning arrester 22 is located above the bottom plate 11, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are both fixedly connected inside the cable chamber 16, the isolating switch 23 is fixedly connected inside the bus chamber 12, the isolating switch 23 is located below the bus chamber 12, the circuit breaker handcart 24 is fixedly connected inside the circuit breaker handcart chamber 14, the circuit breaker handcart 24 is located inside the circuit breaker handcart chamber 14, the bus sleeve 25 is fixedly connected inside the bus chamber 12, the bus sleeve 25 is located inside the bus chamber 12, the main bus 27 is fixed on the inner side of the bus sleeve 25, and the branch bus 26 is fixed on the outer side of the bus sleeve 25.
In this embodiment, the circuit is protected by providing a secondary vacuum contactor 28, which is typically comprised of components such as an insulating, electrically isolating frame, a metal base, a transmission crank, an electromagnetic system, an auxiliary switch, and a vacuum switch tube. When the electromagnetic coil passes through the control voltage, the armature drives the crank arm to rotate, so that the main contact in the vacuum switch tube is switched on, after the electromagnetic coil is switched off, the main contact is disconnected due to the action of the opening spring, each phase of main circuit is formed by connecting two vacuum tubes in series, therefore, if a certain vacuum tube in the main vacuum contactor 21 leaks, the auxiliary vacuum contactor 28 is in a good state, the problem that the main circuit is short-circuited when the certain vacuum tube of the vacuum contactor 21 leaks in the phase sequence switching process is solved, the accident probability is reduced, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are installed in a standard medium-voltage switch cabinet, and can be used in parallel with the standard medium-voltage switch cabinet, and the installation is simple, convenient and quick.
In this embodiment, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are arranged to avoid the situation of a main circuit short circuit in the process of switching the phase sequence, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are both five-pole vacuum contactors, and after the main circuit is switched by the five-pole vacuum contactors, the main circuit of each phase is connected in series by two vacuum tubes, so that if a certain vacuum tube in the main vacuum contactor 21 leaks, the auxiliary vacuum contactor 28 is in a good state, the situation of the main circuit short circuit when the certain vacuum tube of the vacuum contactor leaks in the process of switching the phase sequence is solved, the probability of accidents is reduced, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are installed in a standard medium-voltage switch cabinet and can be used in parallel with the standard medium-voltage switch cabinet, and the installation is simple, convenient and rapid.
Further, the number of the main vacuum contactors 21 is five, and the five main vacuum contactors 21 are equidistantly distributed.
In the embodiment, a main vacuum contactor 21 is arranged to protect a circuit, the vacuum contactor generally comprises an insulating and electricity isolating frame, a metal base, a transmission crank arm, an electromagnetic system, an auxiliary switch, a vacuum switch tube and other components, when an electromagnetic coil passes through control voltage, an armature drives the crank arm to rotate, so that a main contact in the vacuum switch tube is switched on, after the electromagnetic coil is powered off, the main contact is disconnected due to the action of a separating brake spring, each phase of main circuit is connected in series by two vacuum tubes, therefore, if a leakage condition occurs to a certain vacuum tube in the main vacuum contactor 21, the auxiliary vacuum contactor 28 is in a good state, the problem that the main circuit is short-circuited when a leakage condition occurs to a certain vacuum tube of the vacuum contactor 21 is avoided in the phase sequence switching process is solved, the probability of occurrence of accidents is reduced, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are installed in a standard medium-voltage switch cabinet, can be used side by side with a standard medium voltage switch cabinet, and is simple, convenient and quick to install.
Further, the number of the sub-vacuum contactors 28 is five, and the five sub-vacuum contactors 28 are equally spaced.
In this embodiment, the circuit is protected by arranging the auxiliary vacuum contactor 28, the vacuum contactor generally comprises an insulating and electricity isolating frame, a metal base, a transmission crank arm, an electromagnetic system, an auxiliary switch, a vacuum switch tube and other components, when the electromagnetic coil passes through a control voltage, the armature drives the crank arm to rotate, so that a main contact in the vacuum switch tube is switched on, after the electromagnetic coil is powered off, the main contact is disconnected due to the action of a separating spring, each phase of main circuit is connected in series by two vacuum tubes, therefore, if a leakage condition occurs in a certain vacuum tube in the main vacuum contactor 21, the auxiliary vacuum contactor 28 is in a good state, the problem that the main circuit is short-circuited when a leakage condition occurs in a certain vacuum tube of the vacuum contactor 21 is avoided in the phase sequence switching process, the probability of occurrence of accidents is reduced, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are installed in a standard medium voltage switch cabinet, can be used side by side with a standard medium voltage switch cabinet, and is simple, convenient and quick to install.
Further, the number of the disconnecting switches 23 is two, and a certain gap is arranged between the two disconnecting switches 23.
In this embodiment, the disconnecting switch 23 is a switching device mainly used for isolating a power supply, switching operation, connecting and disconnecting a low-current circuit, and having no arc extinguishing function, when the disconnecting switch 23 is in a separated position, an insulation distance and an obvious disconnection mark meeting the specified requirements are arranged between contacts, and when the disconnecting switch 23 is in a closed position, a switching device capable of carrying current under a normal loop condition and current under an abnormal condition within a specified time is generally used as a high-voltage disconnecting switch, namely, a disconnecting switch with a rated voltage of more than 1 kV.
Further, the number of the bus bar sleeves 25, the branch bus bars 26 and the main bus bars 27 is three, three groups of bus bar sleeves 25, three groups of branch bus bars 26 and three groups of main bus bars 27 are distributed at equal intervals, two main bus bars 27 are electrically connected to one of the isolating switches 23, and the other main bus bar 27 is in cable connection with the other isolating switch 23.
In the present embodiment, the bus bushing 25, the branch bus 26 and the main bus 27 are arranged to connect in series to form a loop, the bus system is mainly applied to a low-voltage power distribution cabinet, the incoming and outgoing line loop adopts a non-porous electrical installation technology, the switch is connected with the bus through a bus adapter, the distribution bus is a conductor and a support of an electrical element and is sealed at the back, two main buses 27 are electrically connected to one of the disconnectors 23, and the other main bus 27 is connected to the other disconnector 23 through a cable, so as to form a loop.
Further, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are installed face to face, and an electrical and mechanical interlock is provided between the main vacuum contactor 21 and the auxiliary vacuum contactor 28.
In this embodiment, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are arranged to avoid the short circuit condition of the main circuit in the phase sequence switching process, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are both five-pole vacuum contactors, and after the five-pole vacuum contactor is adopted for phase change of the main circuit, the main circuit of each phase is connected in series by two vacuum tubes, so that if a certain vacuum tube in the main vacuum contactor 21 leaks, the auxiliary vacuum contactor 28 is in a good state, the problem that the main circuit is short-circuited when the certain vacuum tube of the vacuum contactor 21 leaks is solved in the phase sequence switching process, the accident probability is reduced, the main vacuum contactor 21 and the auxiliary vacuum contactor 28 are installed in a standard medium voltage switch cabinet and can be used in parallel with the standard medium voltage switch cabinet, and the installation is simple, convenient and rapid.
The utility model discloses a theory of operation and use flow: the utility model discloses install the back, insert external power source with equipment, main vacuum contactor 21 and vice vacuum contactor 28 are five utmost point vacuum contactor, the main loop commutation adopts behind five utmost point vacuum contactor, realized every looks main loop and established ties by two vacuum tubes, therefore, if the leakage condition appears in certain vacuum tube among the main vacuum contactor 21, vice vacuum contactor 28 is in intact state still, the in-process at switching phase sequence has been solved, the condition of main loop short circuit when avoiding certain vacuum tube of vacuum contactor 21 to appear the leakage condition, the probability that the accident takes place has been reduced, main vacuum contactor 21 and vice vacuum contactor 28 are installed in standard medium voltage switch cabinet, can use side by side with standard medium voltage switch cabinet, simple installation is swift.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides an use medium voltage switchgear of main circuit commutation which characterized in that: including shell subassembly (1) and return circuit subassembly (2), shell subassembly (1) includes bottom plate (11), bus-bar room (12), shell (13), circuit breaker handcart room (14), relay instrument room (15) and cable chamber (16), bottom plate (11), bus-bar room (12), circuit breaker handcart room (14), relay instrument room (15) and equal fixed connection in cable chamber (16) in shell (13), bottom plate (11) are located the bottom of shell (13), cable chamber (16) are located the top of bottom plate (11), circuit breaker handcart room (14) are located the top of cable chamber (16), relay instrument room (15) are located the top of circuit breaker handcart room (14), bus-bar room (12) are located the right side of relay instrument room (15),
the circuit assembly (2) comprises a main vacuum contactor (21), a lightning arrester (22), an isolating switch (23), a circuit breaker handcart (24), a bus sleeve (25), a branch bus (26), a main bus (27) and an auxiliary vacuum contactor (28), wherein the lightning arrester (22) is fixedly connected with the bottom plate (11), the lightning arrester (22) is located above the bottom plate (11), the main vacuum contactor (21) and the auxiliary vacuum contactor (28) are fixedly connected inside the cable chamber (16), the isolating switch (23) is fixedly connected with the bus chamber (12), the isolating switch (23) is located below the bus chamber (12), the circuit breaker handcart (24) is fixedly connected with the circuit breaker handcart chamber (14), and the circuit breaker handcart (24) is located inside the circuit breaker handcart chamber (14), the bus bar sleeve (25) is fixedly connected to the bus bar chamber (12), the bus bar sleeve (25) is located inside the bus bar chamber (12), the main bus bar (27) is fixed on the inner side of the bus bar sleeve (25), and the branch bus bar (26) is fixed on the outer side of the bus bar sleeve (25).
2. A medium voltage switchgear using main circuit commutation according to claim 1, characterized in that: the number of the main vacuum contactors (21) is five, and five main vacuum contactors (21) are equidistantly distributed.
3. A medium voltage switchgear using main circuit commutation according to claim 1, characterized in that: the number of the auxiliary vacuum contactors (28) is five, and five auxiliary vacuum contactors (28) are distributed at equal intervals.
4. A medium voltage switchgear using main circuit commutation according to claim 1, characterized in that: the number of the isolating switches (23) is two, and a certain gap is arranged between the two isolating switches (23).
5. A medium voltage switchgear using main circuit commutation according to claim 1, characterized in that: the number of the bus sleeve pipes (25), the number of the branch buses (26) and the number of the main buses (27) are three, three groups of the bus sleeve pipes (25), the number of the branch buses (26) and the number of the main buses (27) are distributed at equal intervals, two of the main buses (27) are electrically connected to one of the disconnecting switches (23), and the other main bus (27) is in cable connection with the other disconnecting switch (23).
6. A medium voltage switchgear using main circuit commutation according to claim 1, characterized in that: the main vacuum contactor (21) and the auxiliary vacuum contactor (28) are installed face to face, and electrical and mechanical interlocking is arranged between the main vacuum contactor (21) and the auxiliary vacuum contactor (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921662944.XU CN211266245U (en) | 2019-09-30 | 2019-09-30 | Medium-voltage switch cabinet using main loop for phase change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921662944.XU CN211266245U (en) | 2019-09-30 | 2019-09-30 | Medium-voltage switch cabinet using main loop for phase change |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211266245U true CN211266245U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921662944.XU Active CN211266245U (en) | 2019-09-30 | 2019-09-30 | Medium-voltage switch cabinet using main loop for phase change |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211266245U (en) |
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2019
- 2019-09-30 CN CN201921662944.XU patent/CN211266245U/en active Active
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