CN204967248U - Prevent protection device of high -pressure generating line short circuit - Google Patents
Prevent protection device of high -pressure generating line short circuit Download PDFInfo
- Publication number
- CN204967248U CN204967248U CN201520750610.3U CN201520750610U CN204967248U CN 204967248 U CN204967248 U CN 204967248U CN 201520750610 U CN201520750610 U CN 201520750610U CN 204967248 U CN204967248 U CN 204967248U
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- fuse
- short circuit
- generating line
- electrical components
- pressure generating
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- Expired - Fee Related
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Abstract
The utility model discloses a prevent protection device of high -pressure generating line short circuit, including the first fuse and the second fuse of establishing ties each other, first fuse is established ties with electrical components, the second fuse is through the isolator high -pressure generating line that puts in series. The utility model discloses electrical components overload that first fuse is used for inserting or secondary circuit reliably protect when taking place the short circuit, and inside the second fuse is used for electrical components, once protect when side and first fuse short circuit, reliable isolated fault point prevents that the trouble from expanding high -pressure generating line side to. The utility model discloses combine together first fuse and second fuse, adopt the protection of two -stage fuse, avoided the problem that live part takes place to lead to the generating line to have a power failure after the short circuit of once inclining because of the inside and electrical components of electrical components, overcome that ordinary high -tension fuse short -circuit current breaking capacity is not enough, the problem of reliably isolated fault, effectively improved reliability of power supply, can adapt to the requirement that the electric wire netting safety and stability was moved.
Description
Technical field
The utility model belongs to high voltage electric equipment manufacture and power system operation and electric power project engineering field, is specifically related to a kind of protective device preventing high voltage bus short circuit.
Background technology
Domestic In the distribution system of low voltage neutral point mainly takes small current neutral grounding mode, and In the distribution system of low voltage voltage transformer mainly adopts electromagnetic potential transformer, and voltage transformer is by isolating switch, through ordinary high pressure fuse access high voltage bus.When system generation overvoltage often easily causes voltage transformer blast short circuit, voltage transformer adopts the mode of connection through ordinary high pressure fuse access bus generally used at present, ordinary high pressure fuse does not possess larger short circuit current breaking capacity, in the larger situation of system short-circuit electric current cannot reliably isolated fault point thus cause busbar short-circuit, cause large area blackout.
Transformer station, high voltage switchyard at present by station small capacity transformer, by isolating switch, through ordinary high pressure fuse access high voltage bus mode of connection.Under power transformer interior fault or primary side are short-circuited situation, common fuse does not possess larger short circuit current breaking capacity, in the larger situation of system short-circuit electric current cannot reliably isolated fault point thus cause busbar short-circuit, cause large area blackout.
Utility model content
The purpose of this utility model is the technical problem in order to solve protection range and the failed shorted current segmenting scarce capacity existed in prior art, provides a kind of protective device preventing high voltage bus short circuit adapting to power network safety operation requirement.
In order to achieve the above object; the utility model is by the following technical solutions: a kind of protective device preventing high voltage bus short circuit; comprise the first fuse and second fuse of series connection mutually; described first fuse is connected with electric elements, and described second fuse is by isolating switch series connection access high voltage bus.
Further, described first fuse is high-tension fuse.
Further, described second fuse is high-voltage and current-limitation fuse.
Further, described electric elements are voltage transformer or transformer.
Further, dividing plate is provided with between described first fuse and the second fuse.
Further, described first fuse and the second fuse are arranged in different cabinet spaces respectively.
The utility model hinge structure has following beneficial effect: of the present utility model prevent the protective device of high voltage bus short circuit from comprising mutually series connection the first fuse and the second fuse; first fuse carries out reliably protecting when being short-circuited for the electric elements overload that accesses or secondary circuit; second fuse is used for that electric elements are inner, primary side and the first fuse short circuit time protect; reliable isolated fault point, prevents failure propagation to high voltage bus side.First fuse and the second fuse combine by the utility model; adopt the protection of two-stage fuse; avoid the problem because causing bus to have a power failure after electric elements are inner and electric elements primary side live part is short-circuited; overcome ordinary high pressure fuse short circuit current breaking capacity not enough, can not the problem of reliable isolated fault; effectively improve the reliability of power supply, the requirement of power network safety operation can be adapted to.
Accompanying drawing explanation
Fig. 1 is the utility model connection diagram.
The utility model Reference numeral implication is as follows: 1, the first fuse; 2, the second fuse; 3, electric elements; 4, isolating switch; 5, high voltage bus; 6, dividing plate.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of protective device preventing high voltage bus short circuit, comprise the first fuse 1 and the second fuse 2 of series connection mutually, first fuse 1 is high-tension fuse, this fuse cut-offs short circuit current ability at 12KA because manufacturing process limits, second fuse 2 is high-voltage and current-limitation fuse, this fuse can cut-off short circuit current ability and reach 50KA, first fuse 1 is connected with electric elements 3, electric elements 3 are two-phase, threephase potential transformer or dry type, oil-filled transformer, second fuse 2 is connected by isolating switch 4 and is accessed high voltage bus 5, dividing plate 6 quarantine measures are taked between first fuse 1 and the second fuse 2, first fuse 1 and electric elements 3 are arranged on one independently in cabinet space, second fuse 2 and isolating switch 4 are arranged on another independently in cabinet space.
During installation, first fuse 1 and electric elements 3 can utilize the existing KY28 type intermediate switchgear cabinet structure generally used to install, first fuse 1 can be installed concentratedly in KY28 type intermediate switchgear cabinet bottom " cable vault " with electric elements 3, and electric elements 3 also can be selected to install in other separate space.Second fuse 2 can be arranged in KY28 cabinet intermediate switchgear cabinet with isolating switch 4, is replaced by high-voltage and current-limitation fuse dolly by KY28 cabinet inner breaker dolly.Intermediate switchgear cabinet version " breaker chamber " and bottom " cable vault " can reliably isolate, and can avoid completely because electric elements in cable vault 3, the first fuse 1 accident electric arc that is short-circuited seals in the problem that the second fuse 2 power end causes high voltage bus 5 short circuit.
Claims (6)
1. one kind prevents the protective device of high voltage bus short circuit; it is characterized in that: the first fuse (1) and the second fuse (2) that comprise series connection mutually; described first fuse (1) is connected with electric elements (3), and described second fuse (2) is by isolating switch (4) series connection access high voltage bus (5).
2. a kind of protective device preventing high voltage bus short circuit according to claim 1, is characterized in that: described first fuse (1) is high-tension fuse.
3. a kind of protective device preventing high voltage bus short circuit according to claim 1, is characterized in that: described second fuse (2) is high-voltage and current-limitation fuse.
4. a kind of protective device preventing high voltage bus short circuit according to claim 1, is characterized in that: described electric elements (3) are voltage transformer or transformer.
5. a kind of protective device preventing high voltage bus short circuit according to claim 1, is characterized in that: be provided with dividing plate (6) between described first fuse (1) and the second fuse (2).
6. a kind of protective device preventing high voltage bus short circuit according to claim 5, is characterized in that: described first fuse (1) is arranged in different cabinet spaces respectively from the second fuse (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520750610.3U CN204967248U (en) | 2015-09-25 | 2015-09-25 | Prevent protection device of high -pressure generating line short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520750610.3U CN204967248U (en) | 2015-09-25 | 2015-09-25 | Prevent protection device of high -pressure generating line short circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204967248U true CN204967248U (en) | 2016-01-13 |
Family
ID=55062289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520750610.3U Expired - Fee Related CN204967248U (en) | 2015-09-25 | 2015-09-25 | Prevent protection device of high -pressure generating line short circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204967248U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134759A (en) * | 2017-06-01 | 2017-09-05 | 上海金友金弘智能电气股份有限公司 | A kind of intelligent photovoltaic preassembled transformer station high voltage bus protection device and its application method |
-
2015
- 2015-09-25 CN CN201520750610.3U patent/CN204967248U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107134759A (en) * | 2017-06-01 | 2017-09-05 | 上海金友金弘智能电气股份有限公司 | A kind of intelligent photovoltaic preassembled transformer station high voltage bus protection device and its application method |
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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: 20160113 Termination date: 20160925 |