CN86204740U - Precision fault-locating instrument used for power controlling cable - Google Patents
Precision fault-locating instrument used for power controlling cable Download PDFInfo
- Publication number
- CN86204740U CN86204740U CN 86204740 CN86204740U CN86204740U CN 86204740 U CN86204740 U CN 86204740U CN 86204740 CN86204740 CN 86204740 CN 86204740 U CN86204740 U CN 86204740U CN 86204740 U CN86204740 U CN 86204740U
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- China
- Prior art keywords
- testing
- cable
- tester
- power
- power control
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model relates to a precision fault positioning instrument for power control cables, which is suitable for power cables, and is especially suitable for the accurate point fixing and line fixing testing and searching for the faults of motive power control cables. The testing instrument is composed of an electrical source, pulse signals, an AC and DC generating device, an outputting, converted and composite component and the separating components of three independent testing devices (a ground potential discriminator, a small current testing device and an electric leakage detector). The utility model has the advantages of portability, simple operation, strong anti-interference ability and good applicability; besides, the utility model has the performance of the complete set. The testing device is used for testing and searching the cable faults and the wire breakage of direct-buried cables, steel tubes in wells and cable pit laying respectively to achieve the requirements of point fixing and line fixing.
Description
Power control cable fault pinpoint alignment instrument is about the power cable particularly pinpoint, the utility model of alignment tester of power control cable fault.
The fixed point of power cable fault is surveyed and is sought, and can be divided into two kinds of bigness scale and accurate measurements.At present, accurate measurement device is generally used sound detection, frequency induction method.This class testing instrument has following shortcoming:
1. rely on electricity to be converted into sound, use auditory discrimination, the blind area is bigger, so precision is not enough.
2. antijamming capability is relatively poor, does not often reach the target-seeking degree of surveying at the scene.
3. the pattern and the stake resistance of failure cable are had relatively high expectations, poor for applicability.
In view of the problem that above-mentioned prior art exists, task of the present utility model be design a kind of easy to carry, simple to operate, antijamming capability is strong, applicability good, can survey the battery of tests instrument of seeking power cable fault by the pinpoint alignment.
This tester is when breaking down according to cable, has around in the trouble spot principle of a distributed current to formulate out.It is sought device by power supply, pulse signal, alternating current-direct current generating means, output conversion and survey and forms.Device is sought in survey earth potential Discr., little current-flow test set, three kinds of patterns of leakage indicator.Difference according to the cable laying form adopts the survey of different types to seek device.
The earth potential Discr. is made up of handle, zeroing switch, zeroing, power switch, measurement range selection, casing, straight-bar, voltage table, lead, bracing frame, stylus, plate, probe.
Little current-flow test set is made up of reometer, measurement range selection, casing, lead, power switch, plug, clamp on amperemeter.
Leakage indicator is made up of voltage table, measurement range selection, power switch, earth jack, probe, flexible pipe, casing.
This tester is easy to carry, simple to operate, have complete property, antijamming capability is strong, applicability is good, and the requirement that can reach fixed point, alignment is sought in the fault of the cable that steel pipe and cable duct between the cable of multiple pattern such as direct-buried cable, well are laid and the survey of broken string.Thereby reduce recovery project amount and repair time, reduce engineering cost and produce the economic loss of pausing and causing, ensure and produce normal operation.
Description of drawings and use-case:
Fig. 1 is the block scheme of this tester aufbauprinciple.
Fig. 2 is an earth potential Discr. synoptic diagram.The earth potential Discr. is made up of handle (1), zeroing switch (2), zeroing (3), power switch (4), measurement range selection (5), casing (6), straight-bar (7), voltage table (8), lead (9), bracing frame (10), stylus (11), probe (13), plate (12).
Fig. 3 is little current-flow test set synoptic diagram.Little current-flow test set is made up of reometer (19), measurement range selection (5), casing (6), lead (9), power switch (4), plug (14), clamp on amperemeter (15).
Fig. 4 is the leakage indicator synoptic diagram.Leakage indicator is made up of probe (16), flexible pipe (17), earth jack (18), casing (6), voltage table (8), measurement range selection (5), power switch (4).
Fig. 5 surveys to seek the synoptic diagram of direct-buried cable fault.At this moment, the trouble spot has electric current to pass through to the earth, is that the ground potential of sub-circular at center distributes that (more near the trouble spot, current potential is high more, and both sides, trouble spot polarity is opposite with producing with the trouble spot.), available earth potential Discr. (21) is surveyed and is sought.(, then use probe (13) to replace apart stylus (11) if both sides are too big.) insert in the soil of failure cable (20) both sides and (be embedded under cement or other road surfaces as fault cable (20), in the time of can not using stylus (11), probe (13), can locate to load onto plate (12) in stylus (11), after fixing, be placed on the road surface of failure cable (20) both sides.), apply voltage at failure cable (20) one ends, according to the Potential distribution and the polarity of voltage table (8) reflection, current potential Discr. (21) by the plane potential test of X, Y-axis coordinate, can accurately be found out the position of trouble spot movably.
Fig. 6 is that synoptic diagram is sought in the fault survey when steel pipe lays between well.
Fig. 7 is that the fault of cable duct when laying surveyed and sought synoptic diagram.
During the situation of Fig. 6 and Fig. 7, available little current-flow test set (22) is surveyed and is sought.In the scope of trouble spot, clamp card piecemeal with little current-flow test set (22), when being stuck in the two ends, trouble spot, reometer (19) (being used for big electric current) or clamp on amperemeter (15) (being used for less electric current) can have currentless indication, thus the localization of faults.Adopt little current-flow test set (22), can also prevent ground current excessive and the damage adjacent cables.
Synoptic diagram is sought in survey when Fig. 8 is the cable break fault.At this moment, available leakage indicator (23) is surveyed and is sought.Failure cable (20) is applied voltage, seek with along the line survey of leakage indicator (23), the pressure side that breaks so will have the voltage indication, the then no-voltage indication of broken string ground connection side, thus find out the trouble spot.
When many cables laid side by side, available little current-flow test set (22), leakage indicator (23) were surveyed the cable that lays by root and are sought, and finally find out failure cable (20).
Seek in the fault in survey, the pulse signal by different time receives synchronously, and discernible signal and interference have improved antijamming capability and detection sensitivity.
Claims (4)
1, power control cable fault pinpoint alignment instrument, the suitable power cable is the tester of the fixed point alignment of power control cable fault particularly, have power supply, pulse signal, alternating current-direct current generating means and output conversion, it is characterized in that surveying and seeking device is three independently separating components: earth potential Discr., little current-flow test set, leakage indicator.
According to the said tester of claim 1, it is characterized in that 2, the earth potential Discr. is made up of handle, zeroing switch, zeroing, power switch, measurement range selection, casing, straight-bar, voltage table, lead, bracing frame, stylus, plate, probe.
According to the said tester of claim 1, it is characterized in that 3, little current-flow test set is made up of reometer, measurement range selection, casing, lead, power switch, plug, clamp on amperemeter.
According to the said tester of claim 1, it is characterized in that 4, leakage indicator is made up of voltage table, measurement range selection, power switch, earth jack, probe, flexible pipe, casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204740 CN86204740U (en) | 1986-10-31 | 1986-10-31 | Precision fault-locating instrument used for power controlling cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86204740 CN86204740U (en) | 1986-10-31 | 1986-10-31 | Precision fault-locating instrument used for power controlling cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86204740U true CN86204740U (en) | 1987-12-23 |
Family
ID=4807727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86204740 Expired - Lifetime CN86204740U (en) | 1986-10-31 | 1986-10-31 | Precision fault-locating instrument used for power controlling cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86204740U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430743C (en) * | 2004-08-20 | 2008-11-05 | 淄博博鸿电气有限公司 | Directional and positioning testing device for fault of direct application type cable sheath |
| CN107332206A (en) * | 2016-04-29 | 2017-11-07 | 竺红卫 | Earth detector based on many place potential changes |
-
1986
- 1986-10-31 CN CN 86204740 patent/CN86204740U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430743C (en) * | 2004-08-20 | 2008-11-05 | 淄博博鸿电气有限公司 | Directional and positioning testing device for fault of direct application type cable sheath |
| CN107332206A (en) * | 2016-04-29 | 2017-11-07 | 竺红卫 | Earth detector based on many place potential changes |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |