CN204065015U - A kind of low-voltage cable Inner Defect Testing system - Google Patents
A kind of low-voltage cable Inner Defect Testing system Download PDFInfo
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- CN204065015U CN204065015U CN201420503848.1U CN201420503848U CN204065015U CN 204065015 U CN204065015 U CN 204065015U CN 201420503848 U CN201420503848 U CN 201420503848U CN 204065015 U CN204065015 U CN 204065015U
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- 238000012360 testing method Methods 0.000 title claims abstract description 12
- 230000007547 defect Effects 0.000 title claims abstract description 8
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 238000010168 coupling process Methods 0.000 claims abstract description 11
- 238000005859 coupling reaction Methods 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003534 oscillatory effect Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 241000272165 Charadriidae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to a kind of low-voltage cable Inner Defect Testing system, comprises 220kV AC power, the first switch, transformer, alterating and direct current pressure converter, resistance, inductance, high-voltage switch gear, voltage divider, coupling condenser, tested cable, oscillating voltage analyser, voltage detector, the first control signal wire, the second control signal wire.The utility model result is simple, utilizes series resonance principal to produce oscillating voltage, and reliably detect low-voltage cable inside whether defectiveness by analyzing oscillating voltage information, testing result is correctly reliable.
Description
Technical field
The utility model relates to electric device maintenance technology, more particularly, relates to a kind of low-voltage cable Inner Defect Testing system.
Background technology
Along with town site day is becoming tight, original built on stilts low-voltage circuit needs to carry out cable transmission of electricity, to vacate aboveground space for urban construction.If be embedded in the low-voltage cable defectiveness of underground, be in operation and insulation breakdown easily occur and short trouble or blast, both affected urban electricity supply, also impact pedestrian's personal safety on the ground.Before low-voltage cable comes into operation, need to detect low-voltage cable without inherent vice by electrical test means, normal reliable just can be bought in underground and put into operation.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of result simple, series resonance principal is utilized to produce oscillating voltage, reliable low-voltage cable inside whether defectiveness is detected, the correct low-voltage cable Inner Defect Testing system reliably of testing result by analyzing oscillating voltage information.
The technical solution of the utility model is as follows:
A kind of low-voltage cable Inner Defect Testing system, comprises 220kV AC power, the first switch, transformer, alterating and direct current pressure converter, resistance, inductance, high-voltage switch gear, voltage divider, coupling condenser, tested cable, oscillating voltage analyser, voltage detector, the first control signal wire, the second control signal wire;
First switch one end is connected with AC power first output terminal, and the first switch other end is connected with transformer first input end, and transformer second input end is connected with AC power second output terminal;
Alterating and direct current pressure converter has a pair input end, and the pair of output of transformer is connected in parallel with alterating and direct current pressure converter a pair input end respectively, the output terminal input end common ground that be connected corresponding to alterating and direct current pressure converter of transformer;
Another output terminal of alterating and direct current pressure converter and successively contact resistance, inductance, tested cable, tested cable, ground connection, high-voltage switch gear one end picks out from the junction of resistance and inductance, the direct ground connection of the high-voltage switch gear other end;
After voltage divider and coupling condenser are connected in parallel, its one end picks out from tested cable and inductance junction, and the other end is connected with voltage detector, the direct ground connection of voltage detector earth terminal;
Oscillating voltage analyser by the first control signal line traffic control first switch deciliter, by the second control signal line traffic control high-voltage switch gear deciliter, voltage detector is connected with oscillating voltage analyser by signal wire.
The beneficial effects of the utility model are as follows:
The utility model result is simple, utilizes series resonance principal to produce oscillating voltage, and reliably detect low-voltage cable inside whether defectiveness by analyzing oscillating voltage information, testing result is correctly reliable.
High voltage side of transformer ac voltage rectifier is that high direct voltage exports by described alterating and direct current pressure converter.
Described coupling condenser is in parallel with tested cable earth capacitance, regulates the electric capacity of whole system, makes the capacitance parameter of inductance parameters and whole system meet series resonance occurrence condition.
Described voltage divider converts amplitude oscillating voltage to low amplitude value oscillating voltage, then sends oscillating voltage analyser to through voltage detector, carries out signal analysis for oscillating voltage analyser, to judge low-voltage cable inside whether defectiveness.
Accompanying drawing explanation
Fig. 1 is general structure schematic diagram of the present utility model;
In figure: 1 is AC power, 2 is first switches, and 3 is transformers, 4 is alterating and direct current pressure converters, and 5 is resistance, and 6 is inductance, 7 is high-voltage switch gears, 8 is voltage dividers, and 9 is coupling condensers, and 10 is tested cables, 11 is oscillating voltage analysers, 12 is voltage detectors, and 13 is first control signal wires, and 14 is second control signal wires.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, low-voltage cable 10 Inner Defect Testing system, it is characterized in that, comprise 220kV AC power 1, first switch 2, transformer 3, alterating and direct current pressure converter 4, resistance 5, inductance 6, high-voltage switch gear 7, voltage divider 8, coupling condenser 9, tested cable 10, oscillating voltage analyser 11, voltage detector 12, first control signal wire 13, second control signal wire 14.
First switch 2 one end is connected with AC power 1 first output terminal, and first switch 2 other end is connected with transformer 3 first input end, and transformer 3 second input end is connected with AC power 1 second output terminal.
Alterating and direct current pressure converter 4 has a pair input end, and the pair of output of transformer 3 is connected in parallel with alterating and direct current pressure converter 4 a pair input end respectively, the output terminal input end common ground that be connected corresponding to alterating and direct current pressure converter 4 of transformer 3.
Another output terminal of alterating and direct current pressure converter 4 and successively contact resistance 5, inductance 6, tested cable 10, tested cable 10, ground connection, alterating and direct current pressure converter 4 one output terminals are connected with resistance 5 one end, resistance 5 other end is connected with inductance 6 one end, tested cable 10 one end is connected with inductance 6 other end, the direct ground connection of tested cable 10 other end.
High-voltage switch gear 7 one end picks out from the junction of resistance 5 and inductance 6, the direct ground connection of high-voltage switch gear 7 other end; After voltage divider 8 and coupling condenser 9 are connected in parallel, its one end picks out from tested cable 10 with inductance 6 junction, and the other end is connected with voltage detector 12, the direct ground connection of voltage detector 12 earth terminal.
Oscillating voltage analyser 11 by the first control signal wire 13 control the first switch 2 deciliter, by the second control signal wire 14 control high-voltage switch gear 7 deciliter, voltage detector 12 is connected with oscillating voltage analyser 11 by signal wire.
When the utility model field conduct uses, oscillating voltage analyser 11 sends to the first switch 2 order of closing a floodgate by the first control signal wire 13, and close the first switch 2, realizes coupling condenser 9 and the charging of tested cable 10 ground capacitance.To be charged full after, oscillating voltage analyser 11 sends separating brake order by the first control signal wire 13 to the first switch 2, opens the first switch 2.
After the 5 second time of interval, oscillating voltage analyser 11 sends to high-voltage switch gear 7 order of closing a floodgate by the second control signal wire 14, close high-voltage switch gear 7, inductance 6 and coupling capacitance, tested cable 10 ground capacitance generation series resonance produce oscillating voltage, voltage detector 12 sends the low amplitude value oscillatory voltage signals detected to oscillating voltage analyser 11, oscillating voltage analyser 11 pairs of low amplitude value oscillatory voltage signals are analyzed, to judge low-voltage cable 10 inside whether defectiveness.
The oscillating voltage analyser 11 that the utility model adopts is prior art, its voltage analysis carried out also is prior art, the utility model provides a kind of hardware system including oscillating voltage analyser 11, does not therefore repeat the principle of oscillating voltage analyser 11 herein.
Above-described embodiment is only used to the utility model is described, and is not used as restriction of the present utility model.As long as according to technical spirit of the present utility model, change above-described embodiment, modification etc. all will be dropped in the scope of claim of the present utility model.
Claims (1)
1. a low-voltage cable Inner Defect Testing system, it is characterized in that, comprise 220kV AC power, the first switch, transformer, alterating and direct current pressure converter, resistance, inductance, high-voltage switch gear, voltage divider, coupling condenser, tested cable, oscillating voltage analyser, voltage detector, the first control signal wire, the second control signal wire;
First switch one end is connected with AC power first output terminal, and the first switch other end is connected with transformer first input end, and transformer second input end is connected with AC power second output terminal;
Alterating and direct current pressure converter has a pair input end, and the pair of output of transformer is connected in parallel with alterating and direct current pressure converter a pair input end respectively, the output terminal input end common ground that be connected corresponding to alterating and direct current pressure converter of transformer;
Another output terminal of alterating and direct current pressure converter and successively contact resistance, inductance, tested cable, tested cable, ground connection, high-voltage switch gear one end picks out from the junction of resistance and inductance, the direct ground connection of the high-voltage switch gear other end;
After voltage divider and coupling condenser are connected in parallel, its one end picks out from tested cable and inductance junction, and the other end is connected with voltage detector, the direct ground connection of voltage detector earth terminal;
Oscillating voltage analyser by the first control signal line traffic control first switch deciliter, by the second control signal line traffic control high-voltage switch gear deciliter, voltage detector is connected with oscillating voltage analyser by signal wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420503848.1U CN204065015U (en) | 2014-09-02 | 2014-09-02 | A kind of low-voltage cable Inner Defect Testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420503848.1U CN204065015U (en) | 2014-09-02 | 2014-09-02 | A kind of low-voltage cable Inner Defect Testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204065015U true CN204065015U (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420503848.1U Expired - Fee Related CN204065015U (en) | 2014-09-02 | 2014-09-02 | A kind of low-voltage cable Inner Defect Testing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204065015U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110471020A (en) * | 2019-08-26 | 2019-11-19 | 云南电网有限责任公司曲靖供电局 | A kind of capacitance type potential transformer monitoring device with self diagnosis |
-
2014
- 2014-09-02 CN CN201420503848.1U patent/CN204065015U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110471020A (en) * | 2019-08-26 | 2019-11-19 | 云南电网有限责任公司曲靖供电局 | A kind of capacitance type potential transformer monitoring device with self diagnosis |
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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: 20141231 Termination date: 20210902 |