CN203895828U - Ring network switch apparatus - Google Patents
Ring network switch apparatus Download PDFInfo
- Publication number
- CN203895828U CN203895828U CN201420214431.3U CN201420214431U CN203895828U CN 203895828 U CN203895828 U CN 203895828U CN 201420214431 U CN201420214431 U CN 201420214431U CN 203895828 U CN203895828 U CN 203895828U
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- CN
- China
- Prior art keywords
- switch
- chamber
- load switch
- breaker
- circuit breaker
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- Expired - Fee Related
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Abstract
The utility model discloses a ring network switch apparatus, comprising a cabinet body inside of which is divided into a cable chamber, a breaker chamber, a main switch chamber, a bus-bar chamber and a low-voltage control chamber. The cable chamber is arranged at the lower part of the cabinet. A breaker is arranged in the breaker chamber. A three-position load switch is arranged in the main switch chamber. An access cable is connected with an introducing terminal at the bottom of the breaker. A current flows through the breaker, and flows out through the top of the breaker and enters the load switch. The bus-bar chamber is arranged at the upper part of the main switch chamber. A main bus of the load switch in the bus-bar chamber is connected and penetrates the entire switchgear. The low-voltage control chamber is provided with a spring operation mechanism equipped with a position indicator and a mechanical interlocking mechanism, and is connected wotj the load switch of the main switch chamber. The load switch and the breaker are in a combined design through the switch apparatus, the switch apparatus has short circuit protection capability in high-voltage and heavy current, and also has higher insulation horizon. The integral body is simple in structure, convenient in maintenance and has the advantages of miniaturization, combination and low cost.
Description
Technical field
The utility model relates to a kind of AC high-voltage switchgear, relates in particular to a kind of high pressure ring switchgear, is applicable to city power distribution station or building user's switchgear house and uses.
Background technology
Switch cubicle divides high pressure, low pressure.Height is pressed with ring main unit, middle-placed switch cabinet, GG1A etc.So-called looped network switch apparatus is exactly that each distribution branch road is established a switch cubicle (outlet switch cabinet), and the bus of this switch cubicle is exactly a part for ring main simultaneously.In other words, ring main couples together common composition by the bus of every outgoing line cabinet.Every outgoing line cabinet is just " ring main unit ".Take out a ring main unit and be the implication of not seeing " looped network " in fact separately.These ring main units are all little, thereby the high-voltage switch gear of ring main unit does not generally adopt baroque circuit breaker and takes the high voltage load switch with high-tension fuse simple in structure.That is to say, the high-voltage switch gear in ring main unit is generally on-load switch.Ring main unit is to operate normal current with on-load switch, and excises short circuit current with fuse, and the two combines and has replaced circuit breaker, and this can only be confined in certain capacity certainly.
Circuit breaker; both be used in make-and-break contact under normal circumstances; in electric power system because some occasion voltages are high; electric current is large; can be used for again excising short-circuit current; therefore it is bearing the dual role of control and protection simultaneously, and its function is equivalent to the combination of Fuse switch and mistake underheat relay etc.Circuit breaker, owing to having combined floodgate/separating brake function and good insulation characterisitic, has the advantage of large current protection than fuse basis.
At present, external many companies, when producing air loop-network switch cabinet, greatly develop sulphur hexafluoride (SF
6) loop-network switch cabinet, select on-load switch to add fuse structure pattern and protect as transformer circuit, but do not see what employing large capcity breaker was protected.
Summary of the invention
The purpose of this utility model is to provide a kind of overall structure looped network switch apparatus simple and easy to maintenance for this reason, a kind of sulfur hexafluoride ring network switchgear that is suitable for 12 KV indoor AC high-voltage electricity.
For achieving the above object, the technical scheme that the utility model is taked is: a kind of looped network switch apparatus, comprise a cabinet, and in cabinet, be divided into cable vault, breaker chamber, main switch chamber, bus-bar room, several parts in low voltage control chamber.Cable vault is arranged on bottom in cabinet, has access cable and lower earthed switch in cable vault; Circuit breaker is installed in breaker chamber, main switch indoor location has three-stations load switch, access cable is connected with circuit breaker bottom leading-in end, electric current flow through successively switch gearing device, dynamic Contact device, Static Contact device, finally from the terminal at circuit breaker top, flow out, the terminal at circuit breaker top is connected on the below copper busbar of on-load switch; Bus-bar room is arranged in the top of main switch chamber, and the main bus bar of the on-load switch in bus-bar room links together and runs through whole row switch cabinet, and bus couples together common composition ring main; Indoor spring operating mechanism and the mechanical interlock mechanism being provided with position indicating device of low voltage control, is connected with the on-load switch of main switch chamber.
Further, between on-load switch and circuit breaker, have mechanical interlocks, under breaker closing state, on-load switch can not separating brake, only have on-load switch to close a floodgate after circuit breaker just can close a floodgate.
Further, open circuit bottom leading-in end by current transformer stube cable.
Further, the switch gearing device of circuit breaker is an electromagnet structure, the leading-in end electric current electromagnet of flowing through, electric current magnetizable electromagnet, the magnetic force that electromagnet produces strengthens with the enhancing of electric current, when electric current rises to danger level, electromagnet can produce enough large magnetic force, pull a Metallic rod being connected with dynamic Contact device, dynamic Contact device is tilted and leave Static Contact device, then cut off circuit.
Or the switch gearing device of circuit breaker is a bimetal strip structure, when electric current is enough large, bonding jumper from line bend, then drives dynamic Contact device to leave Static Contact device under high electric current.
Or circuit breaker is a ground-fault interrupter, the electric current in the continuous observation circuit of ground-fault interrupter on zero line and live wire, when all are normal, the electric current on two lines should be identical; Once the direct ground connection of live wire, ground-fault interrupter cuts off circuit immediately.
Further, main earthed switch is contained in on-load switch, on-load switch is provided with combined floodgate, separating brake, three service positions of ground connection, moving contact of grounding switch is two blade type, grounding contact is connected on the grounding copper bar of on-load switch, the lower fixed contact of on-load switch is connected on lower wire outlet seat, and upper static contact is connected on wire outlet seat; When on-load switch splitting or integrating lock, earthed switch is in open position; When earthed switch splitting or integrating lock, on-load switch is in open position.
Further, on-load switch is SF
6insulated switch, the shell of on-load switch is formed by poured with epoxy resin, in the inside of on-load switch, is filled with SF
6gas, is provided with pressure release passage at the rear portion of switch housing, is provided with inspection hole, is provided with SF on on-load switch front panel
6gas density instrument.
Further, auxiliary contact, breaking coil, emergency trip mechanism, electrification display, key lock and electrically operated device are also equipped with in low voltage control chamber, also install control loop, measuring instrument and protection relay.
Further, in cable vault, also has lightning arrester; The structure of described lightning arrester is: the earth connection, downlead and the arrester that connect successively, the lower end of arrester arranges the inductance loop being connected with thundercloud testing circuit.
This looped network switch apparatus, by the combination of on-load switch and circuit breaker, has large overcurrent protective capability, have safe and reliable, install easily, few maintenance or the advantage such as non-maintaining, volume is little, remarkable in economical benefits.And the advanced technology adopting, its technical indicator is compared with external industrially developed country, not a halfpenny the worse; All parts all can be realized production domesticization.Compare with foreign same type loop-network switch cabinet, through carefully calculating price, only need 80%～90%.Selection according to user to cabinet type, can also be able to discharge seven types of long cable section of ingoing line cabinet, cable outlet cabinet, bus connecting cabinet, metering cabinets etc., and major programme can be listed 30 kinds of schemes and select for user.
Accompanying drawing explanation
Figure 1 shows that the left side sectional structure chart of looped network switch apparatus;
Figure 2 shows that the front view of loop-network switch cabinet;
Fig. 3 a is depicted as the combined floodgate of on-load switch and the gate-dividing state figure of earthed switch;
Fig. 3 b is depicted as the separating brake of on-load switch and the gate-dividing state figure of earthed switch;
Fig. 3 c is depicted as the separating brake of on-load switch and the "on" position figure of earthed switch.
Embodiment
Below in conjunction with drawings and Examples, illustrate the utility model.
This looped network switch apparatus is with air insulation or SF
6insulation load switch is as main switch, and whole cabinet adopts the loop-network switch cabinet of gas, is applicable to the not only compactness but also open-ended metal enclosed switchgear of power distribution automation.Loop-network switch cabinet is applicable to the ring network power supply of rated voltage 12kV, rated frequency 50Hz three-phase alternating current or double width and penetrates in electric power system the control and protection device as circuit; be applicable to pack into box-type substation; can be used in city power distribution station or building user's switchgear house, in order to improve the reliability of ring network power supply.
This looped network switch apparatus is to adopt on-load switch and the combined power distribution equipment of protecting transformer of circuit breaker, generally three intervals, consists of, i.e. two ring cable turnover intervals and a transformer circuit interval.When supply line breaks down, the switch at looped network interval can guarantee to recover in time to transformer circuit power supply, thereby has improved reliability and the utilance of power supply.
As shown in Figure 1, 2, looped network switch apparatus mainly comprises that by cabinet 1 and the electric elements that are positioned at cabinet on-load switch, circuit breaker, earthed switch, bus, cable connector etc. form.In cabinet, rely on skeleton or baffle for separating to form the parts such as cable vault 2, breaker chamber 3, main switch chamber 4, bus-bar room 5, low voltage control chamber 6.In cabinet, main element and door, be provided with interlock between dividing plate, to reach " five is anti-" requirement.It is switch gear room that loop-network switch cabinet topology layout generally adopts the top of cabinet, and middle and lower part is cable vault and other components and parts chamber.Cable vault 2 is arranged on the bottom of switch cubicle, has access cable in cable vault, lightning arrester and lower earthed switch etc.Circuit breaker 31 is installed, current transformer 32 and electrified sensor 33 in breaker chamber 3.Three-stations load switch 41 is installed in main switch chamber 4, the shell of on-load switch is formed by poured with epoxy resin, inside at on-load switch is filled with sulfur hexafluoride gas, rear portion at switch housing is provided with pressure release passage, on on-load switch, be provided with inspection hole, can observe contact present position, be provided with sulfur hexafluoride gas density instrument, can realize the effective monitoring of Leakage Gas.Bus-bar room 5 is arranged in the top of loop-network switch cabinet, and the main bus bar of the on-load switch in bus-bar room links together and runs through whole row switch cabinet, and bus couples together common composition ring main.In low voltage control chamber 6, be provided with spring operating mechanism and mechanical interlock mechanism with position indicating device; Auxiliary contact, breaking coil, emergency trip mechanism, electrification display, key lock and electrically operated device are also equipped with in low voltage control chamber, and control loop, measuring instrument and protection relay etc. can also be installed in low-pressure chamber space simultaneously.
The utility model adopts 31 pairs of on-load switch 41 overcurrent protections of circuit breaker.Circuit breaker 31 is arranged on to the below of on-load switch 41, and there is mechanical interlocks between on-load switch and circuit breaker, guarantee that under breaker closing state on-load switch can not separating brake, only have on-load switch to close a floodgate after circuit breaker just can close a floodgate, structure refers to accompanying drawing 1.Circuit breaker 31 is arranged on insulator, the electric current of cable access flows into from circuit breaker bottom leading-in end, flow through successively switch gearing device, dynamic Contact device, Static Contact device, finally flow out from the terminal at top, and the terminal at the top of circuit breaker is connected on the copper busbar of on-load switch 41.The bottom leading-in end of circuit breaker connects a current transformer 32, and current transformer 32 is connected on the cable of access.
Switch gearing device can be an electromagnet structure, the leading-in end electric current electromagnet of flowing through, and electric current magnetizable electromagnet, the magnetic force that electromagnet produces strengthens with the enhancing of electric current, if current reduction, magnetic force also can weaken; When electric current rises to danger level, electromagnet can produce enough large magnetic force, pulls a Metallic rod being connected with dynamic Contact device, and this can make dynamic Contact device tilt and leave Static Contact device, then cuts off circuit, and electric current has also just interrupted.Switch gearing device also can be based on identical principle for a pair of bonding jumper structure, and difference is here without to electromagnet energy, but allow bonding jumper under high electric current from line bend, then start linkage, drive dynamic Contact device to leave.Also have some circuit breakers to carry out dislocation switch by filling explosive substance, when electric current surpasses certain level, will light explosive material, driven plunger is opened switch then.More advanced circuit breaker is to use electronic device (semiconductor equipment) to carry out monitoring current level.The precision of these elements is much higher, and can more promptly cut off circuit, but price is also wanted more expensive.
Ground-fault interrupter is a kind of novel breaker.This circuit breaker, can not only prevent room wiring damage, and can protect people to exempt from electric shock.Electric current in the continuous observation circuit of ground-fault interrupter meeting on zero line and live wire.When all are normal, the electric current on two lines should be identical.Once for example, the direct ground connection of live wire (having people accidentally to touch live wire), the electric current on live wire can surge suddenly, and zero line can not.Ground-fault interrupter can cut off immediately circuit after this situation being detected, to prevent the casualty accident of getting an electric shock.Because ground-fault interrupter just can be taken action to danger level without Current rise by the time, thereby its reaction speed is more faster than conventional circuit breaker.
Loop-network switch cabinet requires according to different places will be to diversification, intellectuality, modularization future development.The general layout trend miniaturization of loop-network switch cabinet, densification future development, key is to improve major electrical equipment element insulating level and reliability thereof.The well matched on-load switch of loop-network switch cabinet one, ring network power supply insulation mode divides air insulation and SF
6insulate two kinds.
SF
6insulation mode: city net is generally used looped network.Place with overhead wire, can cause overhead wire by loop-network switch cabinet, then be introduced and drawn by cable.Bus and switch are enclosed in and fill SF
6housing in.The blowing pressure is generally (0.02～0.05) Mpa, due to housings close, therefore be not subject to the impact of external environment, improved the reliability of equipment, can accomplish that volume is little, because the blowing pressure is low, the fine solution of sealing problem, is used during once inflating enough equipment lives.
Air insulation mode: national Specification the air gap distance of air insulation mode, general approach can meet use, but will accomplish that volume is little, is but more difficult.
As shown in Fig. 3 a～3c, on-load switch and combined electrical apparatus thereof are provided with combined floodgate, separating brake, three service positions of ground connection.Main earthed switch is contained in on-load switch.Moving contact of grounding switch 42 is two blade type, and grounding contact 43 is connected on the grounding copper bar in switch gear room; The lower fixed contact 44 of on-load switch is connected on lower wire outlet seat and (is connected with circuit breaker), and upper static contact 45 is connected on wire outlet seat and (is connected with bus).
On-load switch cut-offs principle: when on-load switch splitting or integrating lock, first confirm that earthed switch is in open position; During earthed switch splitting or integrating lock, first true on-load switch is in open position.Guarantee that under breaker closing state on-load switch can not separating brake, only have on-load switch to close a floodgate after circuit breaker just can close a floodgate.Earthed switch, due in circuit breaker upside, can not bear whole short circuit currents, so increased the capacity of closing.The position of all earthed switches shows by the position indicating device on the door of low-pressure chamber chamber, and is subject to main actuating axle actuating above.
The utility model can arrange lightning protection in addition, and the structure of described lightning protection is: the earth connection, downlead and the arrester that connect successively, and the lower end of arrester arranges the inductance loop being connected with thundercloud testing circuit; Utilize the lightning protection of this structure, can effectively prevent that equipment of the present utility model is struck by lightning in the process of using, and plays the effect of life-saving.
That this looped network switch apparatus has is safe and reliable, install easily, few maintenance or the advantage such as non-maintaining, volume is little, remarkable in economical benefits, and the advanced technology adopting, and its technical indicator is compared with external industrially developed country, not a halfpenny the worse; All parts all can be realized production domesticization.Compare with foreign same type loop-network switch cabinet, through measuring and calculating price, only need 80%～90%.
Claims (10)
1. a looped network switch apparatus, is characterized in that: comprise a cabinet (1), be divided into cable vault (2), breaker chamber (3), main switch chamber (4), bus-bar room (5), several parts in low voltage control chamber (6) in cabinet;
Cable vault (2) is arranged on bottom in cabinet, has access cable and lower earthed switch in cable vault;
Circuit breaker (31) is installed in breaker chamber (3), three-stations load switch (41) is installed in main switch chamber (4), access cable is connected with circuit breaker bottom leading-in end, electric current flow through successively switch gearing device, dynamic Contact device, Static Contact device, finally from the terminal at circuit breaker top, flow out, the terminal at circuit breaker (31) top is connected on the below copper busbar of on-load switch (41);
Bus-bar room (5) is arranged in the top of main switch chamber, and the main bus bar of the on-load switch in bus-bar room links together and runs through whole row switch cabinet, and bus couples together common composition ring main;
In low voltage control chamber (6), be provided with spring operating mechanism and the mechanical interlock mechanism with position indicating device, be connected with the on-load switch of main switch chamber.
2. looped network switch apparatus according to claim 1, it is characterized in that: between on-load switch (41) and circuit breaker (31), have mechanical interlocks, under breaker closing state, on-load switch can not separating brake, only have on-load switch to close a floodgate after circuit breaker just can close a floodgate.
3. looped network switch apparatus according to claim 1 and 2, is characterized in that: circuit breaker (31) bottom leading-in end connects a current transformer (32), and current transformer (32) other end is connected on access cable.
4. looped network switch apparatus according to claim 1 and 2, it is characterized in that: the switch gearing device of circuit breaker (31) is an electromagnet structure, the leading-in end electric current electromagnet of flowing through, electric current magnetizable electromagnet, the magnetic force that electromagnet produces strengthens with the enhancing of electric current, when electric current rises to danger level, electromagnet can produce enough large magnetic force, pull a Metallic rod being connected with dynamic Contact device, dynamic Contact device is tilted and leave Static Contact device, then cut off circuit.
5. looped network switch apparatus according to claim 1 and 2, it is characterized in that: the switch gearing device of circuit breaker (31) is a bimetal strip structure, when electric current is enough large, bonding jumper from line bend, then drives dynamic Contact device to leave Static Contact device under high electric current.
6. looped network switch apparatus according to claim 1 and 2, it is characterized in that: circuit breaker (31) is a ground-fault interrupter, electric current in the continuous observation circuit of ground-fault interrupter on zero line and live wire, when all are normal, the electric current on two lines should be identical; Once the direct ground connection of live wire, ground-fault interrupter cuts off circuit immediately.
7. looped network switch apparatus according to claim 1 and 2, it is characterized in that: it is inner that main earthed switch is contained in on-load switch (41), on-load switch (41) is provided with combined floodgate, separating brake, three service positions of ground connection, moving contact of grounding switch (42) is two blade type, grounding contact (43) is connected on the grounding copper bar of on-load switch, the lower fixed contact (44) of on-load switch is connected on lower wire outlet seat, and upper static contact (45) is connected on wire outlet seat; When on-load switch splitting or integrating lock, earthed switch is in open position; When earthed switch splitting or integrating lock, on-load switch is in open position.
8. looped network switch apparatus according to claim 1, is characterized in that: on-load switch (41) is SF
6insulated switch, the shell of on-load switch is formed by poured with epoxy resin, in the inside of on-load switch, is filled with SF
6gas, is provided with pressure release passage at the rear portion of switch housing, is provided with inspection hole, is provided with SF on on-load switch front panel
6gas density instrument.
9. looped network switch apparatus according to claim 1; it is characterized in that: low voltage control chamber (6) are also equipped with auxiliary contact, breaking coil, emergency trip mechanism, electrification display, key lock and electrically operated device, also install control loop, measuring instrument and protection relay.
10. looped network switch apparatus according to claim 1, is characterized in that: in cable vault (2), also have lightning arrester; The structure of described lightning arrester is: the earth connection, downlead and the arrester that connect successively, the lower end of arrester arranges the inductance loop being connected with thundercloud testing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420214431.3U CN203895828U (en) | 2014-04-28 | 2014-04-28 | Ring network switch apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420214431.3U CN203895828U (en) | 2014-04-28 | 2014-04-28 | Ring network switch apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203895828U true CN203895828U (en) | 2014-10-22 |
Family
ID=51722184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420214431.3U Expired - Fee Related CN203895828U (en) | 2014-04-28 | 2014-04-28 | Ring network switch apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203895828U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410001A (en) * | 2014-11-25 | 2015-03-11 | 南通苏源恒炫电气有限公司 | Novel switch cabinet structure |
| CN105305283A (en) * | 2015-09-25 | 2016-02-03 | 李聪 | An insulated and pressure-resistant power cabinet |
| CN107978973A (en) * | 2016-10-25 | 2018-05-01 | 镇江亚昆机械有限公司 | A kind of HXGH1-10 types loop-network switch cabinet |
| CN108767729A (en) * | 2018-08-08 | 2018-11-06 | 湖北省电力装备有限公司 | A kind of small-sized side-mounted looped network breaker cabinet |
| CN111817156A (en) * | 2020-06-27 | 2020-10-23 | 合肥伏安科技有限公司 | A high voltage switch cabinet |
| CN113161917A (en) * | 2021-03-29 | 2021-07-23 | 正耐电气股份有限公司 | Alternating current metal-enclosed switchgear |
| CN113826181A (en) * | 2019-03-29 | 2021-12-21 | 西门子股份公司 | Optimized three-position switch |
-
2014
- 2014-04-28 CN CN201420214431.3U patent/CN203895828U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410001A (en) * | 2014-11-25 | 2015-03-11 | 南通苏源恒炫电气有限公司 | Novel switch cabinet structure |
| CN105305283A (en) * | 2015-09-25 | 2016-02-03 | 李聪 | An insulated and pressure-resistant power cabinet |
| CN107978973A (en) * | 2016-10-25 | 2018-05-01 | 镇江亚昆机械有限公司 | A kind of HXGH1-10 types loop-network switch cabinet |
| CN108767729A (en) * | 2018-08-08 | 2018-11-06 | 湖北省电力装备有限公司 | A kind of small-sized side-mounted looped network breaker cabinet |
| CN113826181A (en) * | 2019-03-29 | 2021-12-21 | 西门子股份公司 | Optimized three-position switch |
| CN113826181B (en) * | 2019-03-29 | 2024-06-07 | 西门子股份公司 | Optimized three-position switch |
| CN111817156A (en) * | 2020-06-27 | 2020-10-23 | 合肥伏安科技有限公司 | A high voltage switch cabinet |
| CN111817156B (en) * | 2020-06-27 | 2022-02-15 | 浙江天润电气有限公司 | High-voltage switch cabinet |
| CN113161917A (en) * | 2021-03-29 | 2021-07-23 | 正耐电气股份有限公司 | Alternating current metal-enclosed switchgear |
| CN113161917B (en) * | 2021-03-29 | 2023-02-28 | 正耐电气股份有限公司 | Alternating current metal-enclosed switchgear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 |