CN203606452U - Novel high-voltage intelligent bridge-method cable fault tester - Google Patents
Novel high-voltage intelligent bridge-method cable fault tester Download PDFInfo
- Publication number
- CN203606452U CN203606452U CN201320641417.7U CN201320641417U CN203606452U CN 203606452 U CN203606452 U CN 203606452U CN 201320641417 U CN201320641417 U CN 201320641417U CN 203606452 U CN203606452 U CN 203606452U
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- power supply
- intelligent bridge
- bridge
- novel high
- automated intelligent
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- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a novel high-voltage intelligent bridge-method cable fault tester, and the tester comprises a power supply, a circuit detection device, an automatic intelligent bridge circuit device, and a housing. A 5kv high-voltage high-frequency constant current power supply, which is small in size and light in weight, is designed through employing a novel switching power supply and the technology of frequency conversion and resonance. The short-circuit output current of the 5kv high-voltage high-frequency constant current power supply can reach 500 mA. An automatic intelligent bridge is employed for replacing a galvanometer, and there is no need of hand regulation of balance, thereby achieving the automatic calculation and display of data.
Description
Technical field
The utility model relates to a kind of power equipment, especially a kind of for cable fault detection instrument device.
Background technology
After the power cable generation Fault of Insulating Breakdown of operation, all must use electric cable failure detector to carry out troubleshooting and also locate, so that salvaging cable restoring electricity.So how to find fast and accurately trouble spot, it is the direction of domestic and international research institution and producer's research always.At present bigness scale cable fault localization method has two kinds of bridge method and wave reflection methods.Wave reflection method orientator is more universal, and its advantage is to test most of cable faults, and its shortcoming is on-the-spot line complexity, has blind area, location.When waveform is not true to type, require location personnel skillfully to grasp instrument, and experiencedly could offer an explanation pulse waveform.There are several cable faults to be difficult to search by wave reflection method, as sheath of hv cable insulation defect point, steel-tape armouring low-pressure cable, PVC cable do not have reflection wave to locate, and stub cable cannot be located, some high resistant breakdown points under surge voltage, cannot puncture be also difficult to location.HV bridge method electric cable failure detector designs based on MURRAY electrical bridge principle, includes high-frequency high-voltage constant-current source, has solved the interference difficult problem of power supply to the highly sensitive amplification of electric bridge, and power supply and electric bridge combination are integrated.Measuring cable is special high-tension cable, adopts four-end method resistance measurement principle, and positioning precision is high, electric bridge is placed in high-pressure side, and operating knob safety ground has thoroughly solved the limitation of bridge method for high resistant location, make bridge method non-blind area, accurately, feature is brought into play easily.
The advantage of bridge method: simple to operate, without judging waveform, operating personnel also can operate without rich experience.But current HV bridge method electric cable failure detector also has obvious shortcoming: 1, high-frequency high-voltage constant-current power is little, can only export the measuring current of 50mA left and right, thereby cause instrument test sensitivity low, data consistency is poor, the interference that is simultaneously subject to other signals, makes test crash; 2, existing equipment can only be mechanical type electric bridge, needs manual shift bridge balance, and the data that obtain are the ratio of a total length, also needs manually to calculate fault distance.
Summary of the invention
The utility model is to solve the problem that bridge method detection streamer fault exists, and a kind of checkout equipment with automated intelligent bridge diagram and large power supply is provided, and it is simple in structure, practicality.
The technical solution of the utility model is achieved in that novel high-pressure learning bridge method electric cable failure detector, comprise power supply and circuit checker, automated intelligent bridge diagram device and shell, described power supply, circuit checker and the setting of automated intelligent bridge diagram device are in the enclosure, required constant current source when described power supply provides detection failure, described circuit checker connects trouble spot by cable, on described automated intelligent bridge diagram device, is provided with display screen.
As preferably, described power supply is a kind of 5kv high voltagehigh frequency constant-current supply.
The utility model adopts novel switched power supply and frequency conversion resonance vibration technical design to go out the little lightweight 5kv high voltagehigh frequency constant-current supply of volume, exportable short-circuit current can reach 500mA, and substituted galvanometer without manual shift balance with automated intelligent electric bridge, realize data and automatically calculated and show.
Accompanying drawing explanation
Fig. 1: the utility model structural drawing.
Embodiment
Below in conjunction with accompanying drawing explanation, the utility model is described further.
As Fig. 1, the utility model novel high-pressure learning bridge method electric cable failure detector, comprise power supply (1), circuit checker (2), automated intelligent bridge diagram device (3) and shell (4), described power supply (1), circuit checker (2) and automated intelligent bridge diagram device (3) are arranged in shell (4), required constant current source when described power supply (1) provides detection failure, described circuit checker (2) connects trouble spot by cable, on described automated intelligent bridge diagram device (3), be provided with display screen, be used for the result that shows that automated intelligent bridge diagram device (3) data are calculated automatically, described power supply (1) is a kind of 5KW high voltagehigh frequency constant-current supply.
The utility model adopts novel switched power supply and frequency conversion resonance vibration technical design to go out the little lightweight 5kv high voltagehigh frequency constant-current supply of volume, exportable short-circuit current can reach 500mA, and substituted galvanometer with automated intelligent electric bridge, without manual shift balance, realize data and automatically calculated and show.
Claims (2)
1. a novel high-pressure learning bridge method electric cable failure detector, comprise power supply, circuit checker and shell, it is characterized in that, also comprise automated intelligent bridge diagram device, described power supply, circuit checker and the setting of automated intelligent bridge diagram device are in the enclosure, required constant current source when described power supply provides detection failure, described circuit checker connects trouble spot by cable, on described automated intelligent bridge diagram device, is provided with display screen.
2. novel high-pressure learning bridge method electric cable failure detector according to claim 1, is characterized in that, described power supply is a kind of 5kv high voltagehigh frequency constant-current supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320641417.7U CN203606452U (en) | 2013-10-17 | 2013-10-17 | Novel high-voltage intelligent bridge-method cable fault tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320641417.7U CN203606452U (en) | 2013-10-17 | 2013-10-17 | Novel high-voltage intelligent bridge-method cable fault tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203606452U true CN203606452U (en) | 2014-05-21 |
Family
ID=50719117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320641417.7U Expired - Fee Related CN203606452U (en) | 2013-10-17 | 2013-10-17 | Novel high-voltage intelligent bridge-method cable fault tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203606452U (en) |
-
2013
- 2013-10-17 CN CN201320641417.7U patent/CN203606452U/en not_active Expired - Fee Related
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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: 20140521 Termination date: 20141017 |
|
| EXPY | Termination of patent right or utility model |