CN201773754U - High-capacity vacuum circuit breaker for protecting short-circuit impact generator used in testing station - Google Patents
High-capacity vacuum circuit breaker for protecting short-circuit impact generator used in testing station Download PDFInfo
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- CN201773754U CN201773754U CN2010202991792U CN201020299179U CN201773754U CN 201773754 U CN201773754 U CN 201773754U CN 2010202991792 U CN2010202991792 U CN 2010202991792U CN 201020299179 U CN201020299179 U CN 201020299179U CN 201773754 U CN201773754 U CN 201773754U
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- vacuum circuit
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Abstract
The utility model relates to a high-capacity vacuum circuit breaker for protecting a short-circuit impact generator used in a testing station. The vacuum circuit breaker comprises a protective vacuum circuit breaker and a high-coupling reactor, wherein the protective vacuum circuit breaker is used for opening and closing short circuit currents; and the high-coupling reactor executes the functions of current equalization and current limitation and overcomes the deficiencies caused by shunt-wound extinguishing chambers. The coupling reactor not only enables the arc extinguishing chambers of two branch circuits to share currents automatically and equally in case of normal current discharge, but also can effectively limit the current of the arc extinguishing chamber which cuts off the short-circuit currents when the arc extinguishing chambers cut off the short-circuit currents asynchronously, thereby ensuring that the protecting vacuum circuit breaker can open and close the short-circuit currents reliably.
Description
Technical field
The utility model relates to a kind of vacuum circuit-breaker, is specifically related to a kind of big capacity test station short-circuit impact generator protection vacuum circuit-breaker that can protect the safe operation of short-circuit impact generator.
Background technology
At present, along with the reinforcement of electric power system networking, the short circuit current level of system sharply increases, and device for switching cut-offs the ability of short circuit current also in continuous reinforcement.In order to satisfy the requirement of device for switching type approval test, High-Voltage Electrical Appliances inspection center needs constantly to strengthen test capability, increases the short-circuit impact generator capacity.Therefore, the protective capability of impact generator outlet place protective circuit breaker has proposed very high requirement, not only can cooperate surge generator normally to move, and does not influence generator and goes out merit, and can reliably cut-off short circuit current, and the protection generator is not damaged.
Because the experiment station, makes that big capacity sulphur hexafluoride generator circuit breakers volume when satisfying short circuit current and cut-off requirement condition is too huge with short-circuit impact generator its own particularity, and cost even exceed surge generator itself.Therefore scheme is cut-off in the parallel connection of generator protection vacuum circuit-breaker arc control device becomes the feasible program of protection test station with the short-circuit impact generator.But the simple parallel connection of arc control device exists a lot of problems, is having a strong impact on the reliability of circuit breaker.As under normal through-flow situation, because two arc control device loop resistances in parallel are inconsistent, can make that two branch current sizes are unequal, thereby cause the possibility of through-flow more arc control device contact generation melting welding to increase, the synchronism when long-term use meeting grievous injury two arc control device cut-off short circuit current; Cut-offfing under the short circuit current situation, the difference of the inconsistent or arc extinction performance of arc control device action makes short circuit current not cut-off simultaneously, and the arc control device of back arc extinguishing will bear the short circuit current of twice, finally cause cut-offfing failure.Therefore the simple and joint conference of arc control device reduces the reliability that generator circuit breakers cut-off short circuit current greatly.
Summary of the invention
The purpose of this utility model is to provide a kind of arc control device of having realized when parallel running; can divide equally two branch currents under the normal through-flow situation; cut-offfing the arc control device electric current that cut-offs after effectively limiting under the short circuit current situation, thereby the big capacity test station that has guaranteed the circuit breaker reliability service is with short-circuit impact generator protection vacuum circuit-breaker.
For achieving the above object, the technical solution adopted in the utility model is: comprise the separate three-phase protective vacuum circuit-breaker that is electrically connected with the short-circuit impact generator, each is protected vacuum circuit-breaker to comprise single-phase vacuum circuit breaker, high mutual reactor mutually, connects busbar and supporting insulator;
Described single-phase vacuum circuit breaker comprises frame and rack-mounted two vacuum interrupters, and described two vacuum interrupters all are connected with operating mechanism;
The coupling coil that described high mutual reactor comprises iron core and is wound on two groups of mutually insulateds on this iron core, high mutual reactor supports with insulator, and two coupling coils are connected with two vacuum interrupters respectively by connecting busbar.
The inductance value of described two coupling coils is identical, when the coiling mode makes in coupling coil galvanization, produces equal and opposite in direction, magnetic flux that direction is opposite in two coupling coil iron circuits.
Two vacuum interrupter resistance in circuit value sizes of described single-phase vacuum circuit breaker are identical.
The inductance value of described high mutual reactor coupling coil matches with the short-circuit impact generator parameter, and computational methods are:
If the surge generator rated voltage is U
r, the rated short circuit current of requirement is I
d, the surge generator direct impedance is X "
TIgnore busbar and connect resistance, the required inductance value of coupling coil is L, then:
The coupling coil impedance is:
The coupling coil inductance is: L=Z/ ω, wherein: ω=100 π.
The present invention is made up of protection vacuum circuit-breaker and high mutual reactor for experiment station's short-circuit impact generator protection vacuum circuit-breaker.Wherein vacuum circuit-breaker is used for the folding short circuit current, and high mutual reactor is finished current-sharing/current-limiting function, is used for overcoming the deficiency of arc control device when in parallel.The arc control device that this mutual reactor not only makes two branch roads can be divided equally electric current normal when through-flow automatically; and when arc control device do not cut-off short circuit current simultaneously; the arc control device electric current that cut-offs after can effectively limiting, thus guarantee that the protection vacuum circuit-breaker can reliably cut-off short circuit current.
Description of drawings
Fig. 1 (A) is a vertical view of the present utility model;
Fig. 1 (B) is an end view of the present utility model
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to Fig. 1 (A) and Fig. 1 (B), the utility model comprises the separate three-phase protective vacuum circuit-breaker that is electrically connected with the short-circuit impact generator, and each is protected vacuum circuit-breaker to comprise single-phase vacuum circuit breaker 1, high mutual reactor 2 mutually, connects busbar 3 and supporting insulator 4;
Described single-phase vacuum circuit breaker 1 comprises frame 5 and rack-mounted two vacuum interrupters 6, and described two vacuum interrupter resistance in circuit value sizes are identical, and two vacuum interrupters 6 all are connected with operating mechanism 7;
The coupling coil 9 that described high mutual reactor 2 comprises iron core 8 and is wound on two groups of mutually insulateds on this iron core 8, the inductance value of two coupling coils 9 is identical, when the coiling mode makes in coupling coil 9 galvanization, in two coupling coil iron circuits, produce equal and opposite in direction, magnetic flux that direction is opposite; High mutual reactor supports with supporting insulator 4, and two coupling coils 9 are connected with two vacuum interrupters 6 respectively by connecting busbar 3.
The inductance value of high mutual reactor coupling coil matches with the short-circuit impact generator parameter, and computational methods are:
If the surge generator rated voltage is U
r, the rated short circuit current of requirement is I
d, the surge generator direct impedance is X "
TIgnore busbar and connect resistance, the required inductance value of coupling coil is L, then:
The coupling coil impedance is:
The coupling coil inductance is: L=Z/ ω, wherein: ω=100 π
The utility model is under normal through-flow situation, and two vacuum interrupters 6 of vacuum circuit-breaker 1 all are in closure state.When the electric current that flows through two coupling coils 9 equated, two branch roads produced opposite, the equal-sized magnetic flux of direction in iron core 8, and the magnetic flux in the iron core 8 is zero.Coupling inductance only presents leakage impedance, and resistance value is very little, and loss can be ignored.When the electric current that flows through two coupling coils 9 is unequal, can produce the magnetic flux of alternation in the iron core 8, thereby induce the electromotive force of alternation, this electromotive force makes the electric current in two coupling coils 9 be tending towards equal, makes that promptly the electric current in the two branch road vacuum interrupters 6 is tending towards equal.
Cut-offfing under the short circuit current situation, two vacuum interrupters 6 are opened generation electric arc simultaneously, if two vacuum interrupter while extinguish arcs then represent successfully to cut-off short circuit current; If at first blow-out of one of them vacuum interrupter, with the electric current vanishing in the coupling coil that this vacuum interrupter links to each other, this moment short circuit current all be loaded into another coupling coil with vacuum interrupter that this coupling coil is connected on, and coupling coil 2 presents bigger inductance at this moment, and short circuit current is restricted to below the rated short circuit drop-out current value of single vacuum interrupter, thereby the circuit breaker that cut-offs after guaranteeing still can successfully cut-off short circuit current.
Claims (4)
1. a big capacity test station is with short-circuit impact generator protection vacuum circuit-breaker, it is characterized in that: comprise the separate three-phase protective vacuum circuit-breaker that is electrically connected with the short-circuit impact generator, each is protected vacuum circuit-breaker to comprise single-phase vacuum circuit breaker, high mutual reactor mutually, connects busbar and supporting insulator;
Described single-phase vacuum circuit breaker comprises frame and rack-mounted two vacuum interrupters, and described two vacuum interrupters all are connected with operating mechanism;
The coupling coil that described high mutual reactor comprises iron core and is wound on two groups of mutually insulateds on this iron core, high mutual reactor supports with insulator, and two coupling coils are connected with two vacuum interrupters respectively by connecting busbar.
2. big capacity test according to claim 1 station short-circuit impact generator protection vacuum circuit-breaker; it is characterized in that: the inductance value of described two coupling coils is identical; when the coiling mode makes in coupling coil galvanization, in two coupling coil iron circuits, produce equal and opposite in direction, magnetic flux that direction is opposite.
3. big capacity test according to claim 1 station short-circuit impact generator protection vacuum circuit-breaker, it is characterized in that: two vacuum interrupter resistance in circuit value sizes of described single-phase vacuum circuit breaker are identical.
4. big capacity test according to claim 1 station short-circuit impact generator protection vacuum circuit-breaker, it is characterized in that: the inductance value of described high mutual reactor coupling coil matches with the short-circuit impact generator parameter, and computational methods are:
If the surge generator rated voltage is U
r, the rated short circuit current of requirement is I
d, the surge generator direct impedance is X "
TIgnore busbar and connect resistance, the required inductance value of coupling coil is L, then:
The coupling coil impedance is:
The coupling coil inductance is: L=Z/ ω, wherein: ω=100 π.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202991792U CN201773754U (en) | 2010-08-20 | 2010-08-20 | High-capacity vacuum circuit breaker for protecting short-circuit impact generator used in testing station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202991792U CN201773754U (en) | 2010-08-20 | 2010-08-20 | High-capacity vacuum circuit breaker for protecting short-circuit impact generator used in testing station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201773754U true CN201773754U (en) | 2011-03-23 |
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ID=43753597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202991792U Expired - Lifetime CN201773754U (en) | 2010-08-20 | 2010-08-20 | High-capacity vacuum circuit breaker for protecting short-circuit impact generator used in testing station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201773754U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269315A (en) * | 2014-09-05 | 2015-01-07 | 中国西电电气股份有限公司 | High-power switch with current limiter |
| CN107302211A (en) * | 2017-07-31 | 2017-10-27 | 国网电力科学研究院武汉南瑞有限责任公司 | Experiment station's generator protection and operating breaker complexes and its control method |
| CN107453327A (en) * | 2017-08-16 | 2017-12-08 | 国电南瑞科技股份有限公司 | A kind of field circuit breaker demagnetization circuit in parallel and method using mutual reactor |
-
2010
- 2010-08-20 CN CN2010202991792U patent/CN201773754U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269315A (en) * | 2014-09-05 | 2015-01-07 | 中国西电电气股份有限公司 | High-power switch with current limiter |
| CN107302211A (en) * | 2017-07-31 | 2017-10-27 | 国网电力科学研究院武汉南瑞有限责任公司 | Experiment station's generator protection and operating breaker complexes and its control method |
| CN107453327A (en) * | 2017-08-16 | 2017-12-08 | 国电南瑞科技股份有限公司 | A kind of field circuit breaker demagnetization circuit in parallel and method using mutual reactor |
| CN107453327B (en) * | 2017-08-16 | 2019-08-16 | 国电南瑞科技股份有限公司 | A kind of field circuit breaker demagnetization circuit in parallel and method using mutual reactor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110323 |
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| CX01 | Expiry of patent term |