CN201773693U - High pressure measuring tank with fuses in two phases - Google Patents
High pressure measuring tank with fuses in two phases Download PDFInfo
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- CN201773693U CN201773693U CN2010205070135U CN201020507013U CN201773693U CN 201773693 U CN201773693 U CN 201773693U CN 2010205070135 U CN2010205070135 U CN 2010205070135U CN 201020507013 U CN201020507013 U CN 201020507013U CN 201773693 U CN201773693 U CN 201773693U
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Abstract
The utility model discloses a high pressure measuring tank with fuses in two phases. The high pressure measuring tank is provided with an A phrase, a B phrase and a C phrase which are respectively connected with three transmission lines, wherein the A phrase and the C phrase are arranged at two sides of the high pressure measuring tank; in the A phrase, one fuse is arranged between a connecting terminal and a connecting end of one transmission line; and in the C phrase, one fuse is also arranged between a connecting terminal and a connecting end of one transmission line. When a current value or voltage value exceeds a specified value, fuse wires in the fuses fuse due to overcurrent, thus switching off a circuit; and the overcurrent can not pass through an electric metering box, thus really protecting the electric metering box and the safety of electrical equipment connected at secondary ends of the electric metering box.
Description
Technical field:
The utility model relates to a kind of High-voltage measuring box, relates in particular to a kind of High-voltage measuring box of diphasic zone fuse.
Background technology:
High-voltage measuring box claims combination transformer again, is the electric power metering device that electric power system is generally used.Along with the development perfect gradually, power technology of electric power system is upgraded, it is unprecedented that the operating position of High-voltage measuring box reaches.High-voltage measuring box becomes the indispensable metering device of electric power system.A large amount of high-voltage power metering casees come into operation, but because each manufacturing firm's technology is had nothing in common with each other, equipment and process are not quite similar, and the high-voltage power metering case product quality of manufacturing is very different, this has brought new test also for the safety of electric power system.
Electric power system is a special industry, is the basic activity of the national economic development, and the clothing ,food and housing provisional capital of the operation of any commerce, industry and average family be unable to do without electricity, and oneself becomes industrial society, the indispensable part of people's daily life electricity.
But, because there are a lot of destabilizing factors in the operation of electric power system three-phase line, as overvoltage, overcurrent, resonance, decompression or the like, make that operating electric metering box situation is abominable, wherein the correlative factor that causes of system's overvoltage, overcurrent and resonance is to the having the greatest impact of electric metering box, and makes electric metering box operation heating even burn.
Summary of the invention:
For overcoming the defective of prior art; the purpose of this utility model is to provide a kind of High-voltage measuring box of diphasic zone fuse; when curtage numerical value surpasses setting; fuse in the fuse is owing to overcurrent fuses; thereby cut-out circuit; overcurrent can not be passed through electric metering box, thus the safety of really protecting electric metering box and being connected to electric metering box secondary terminals power equipment.
The utility model technical solution problem adopts following technical scheme:
The High-voltage measuring box of diphasic zone fuse, described High-voltage measuring box has A phase, B phase, C phase and joins with three power transmission lines respectively, wherein A is in the both sides of described High-voltage measuring box mutually mutually with C, be provided with fuse between its binding post and the power transmission line terminals at described A in mutually, also be provided with fuse between its binding post and the power transmission line terminals in mutually at described C.
Described A mutually in, described High-voltage measuring box has lower counterbore, the binding post of High-voltage measuring box is positioned at described lower counterbore bottom, on described binding post, be disposed with spring and fuse, the rainproof bolt, the silicon rubber rain cover that on described fuse, be provided with waterproof washer successively, are connected with the nut on fuse top, described rainproof bolt is connected with power transmission line; The C of described High-voltage measuring box is identical with the A phase structure.
The A that the utility model mainly adopts at batch meter, C two-phase add the new technology of high-tension fuse simultaneously, guarantee the safe operation of three-phase circuit.Electric metering box is combined placement by two current transformers and two single-phase potential transformers; if only install a fuse mutually additional at B; when A or C phase single-phase earthing occurring; other two phase voltage raises; electric current increases; be prone to overcurrent situations; when having served as current values and having reached the fuse rated blowing-current; be installed in B phase fuse fuse overcurrent and be subjected to thermal cut; but; because two voltage transformers in the electric metering box are the V-V connection, be equivalent to two voltage transformer primary connection end operated in series connection and wherein be equivalent to hot-wire coil with earth fault terminal voltage instrument transformer this moment, can be equal to an earthed voltage transformer after the simplification; and voltage; electric current is excessive; and do not have fuse protection, make another unearthed voltage transformer coil overvoltage; overcurrent is until burning.Shown in Figure 4, in like manner, if the electric metering box secondary terminals has a phase (a or c phase) short circuit, and b is neutral point mutually, and b was exactly earth point mutually originally, a or c are attached thereto mutually, then single phase ground fault will appear in the secondary connection end, and situation is same as above, and big electric current appears in circuit, overcurrent flows through the instrument transformer that connects thereon, easily makes its damage.
The utility model is at the PT of electric metering box element primary connection end; soon electric metering box is connected directly to the terminals in the circuit on power system; A; the C two-phase adds high-tension fuse simultaneously; and high-tension fuse is built in the electric-power metering casing; making it becomes an integral body with electric metering box; when the electric power system parameter changes; the most direct numerical value change promptly is an electric current; the variation of voltage; or the electric current that is caused by overvoltage increases; this electric current flows through electric metering box through high-tension fuse; when numerical value surpasses setting; fuse in the fuse is owing to overcurrent fuses; thereby the cut-out circuit, overcurrent can not be passed through electric metering box, thereby really protects electric metering box; and the safety that is connected to electric metering box secondary terminals power equipment.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
The utility model is provided with fuse with C mutually mutually at the A of High-voltage measuring box, high-tension fuse is located in the High-voltage measuring box, and fuse is detachable, backs out rainproof bolt, and the spring on the fuse base can eject high-tension fuse, easily change, the fuse that more renews gets final product, and does not influence reusing of electric metering box, greatly reduces the use cost of electric metering box, and need not large-area power-cuts maintenance, reduced the time of maintenance, maintenance.
The utility model mainly adopts the outdoor high-voltage epoxy resin of external introduction, and the vacuum moulding by casting replaces old-fashioned oil immersion electric metering box, no oiling, and antiultraviolet, it is antifouling that big or small full skirt designs the III level at interval.
Description of drawings:
Fig. 1 is the front view of the utility model High-voltage measuring box; Fig. 2 is the vertical view of Fig. 1; Fig. 3 is the A-A cutaway view of Fig. 2; Fig. 4 is the elementary diagram of the utility model High-voltage measuring box.
Number in the figure: 1 lower counterbore, 2 binding posts, 3 springs, 4 fuses, 5 waterproof washers, 6 rainproof bolts, 7 silicon rubber rain covers, 8 High-voltage measuring boxs, 9 nuts.
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment:
Embodiment: in conjunction with Fig. 1-4, the High-voltage measuring box 8 of present embodiment, have A phase, B phase, C mutually and join with three power transmission lines respectively, wherein A is in the both sides of described High-voltage measuring box mutually mutually with C, be provided with fuse between its binding post and the power transmission line terminals at described A in mutually, also be provided with fuse between its binding post and the power transmission line terminals in mutually at described C.In specifically being provided with, in conjunction with Fig. 3,4, described A mutually in, described High-voltage measuring box has lower counterbore 1, the binding post 2 of High-voltage measuring box 8 is positioned at described lower counterbore bottom, on described binding post, be disposed with spring 3 and fuse 4, the rainproof bolt 6, the silicon rubber rain cover 7 that on described fuse, be provided with waterproof washer 5 successively, are connected with the nut 9 on fuse top; Described rainproof bolt is connected with power transmission line; The C of described High-voltage measuring box is identical with the A phase structure.
Claims (2)
1. the High-voltage measuring box of diphasic zone fuse, described High-voltage measuring box has A phase, B phase, C phase and joins with three power transmission lines respectively, wherein A is in the both sides of described High-voltage measuring box mutually mutually with C, it is characterized in that being provided with fuse between its binding post and the power transmission line terminals in mutually, also be provided with fuse between its binding post and the power transmission line terminals in mutually at described C at described A.
2. the High-voltage measuring box of diphasic zone fuse according to claim 1, it is characterized in that described A mutually in, described High-voltage measuring box has lower counterbore, the binding post of High-voltage measuring box is positioned at described lower counterbore bottom, on described binding post, be disposed with spring and fuse, the rainproof bolt, the silicon rubber rain cover that on described fuse, be provided with waterproof washer successively, are connected with the nut on fuse top, described rainproof bolt is connected with power transmission line; The C of described High-voltage measuring box is identical with the A phase structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205070135U CN201773693U (en) | 2010-08-19 | 2010-08-19 | High pressure measuring tank with fuses in two phases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205070135U CN201773693U (en) | 2010-08-19 | 2010-08-19 | High pressure measuring tank with fuses in two phases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201773693U true CN201773693U (en) | 2011-03-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205070135U Expired - Fee Related CN201773693U (en) | 2010-08-19 | 2010-08-19 | High pressure measuring tank with fuses in two phases |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201773693U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557719A (en) * | 2020-11-06 | 2021-03-26 | 广西电网有限责任公司南宁供电局 | Emergency metering method for high-supply high-metering voltage phase-loss compensation electric quantity |
-
2010
- 2010-08-19 CN CN2010205070135U patent/CN201773693U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557719A (en) * | 2020-11-06 | 2021-03-26 | 广西电网有限责任公司南宁供电局 | Emergency metering method for high-supply high-metering voltage phase-loss compensation electric quantity |
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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 |
Granted publication date: 20110323 Termination date: 20150819 |
|
| EXPY | Termination of patent right or utility model |