CN109490710A - The method for searching aluminium cable breakpoint - Google Patents
The method for searching aluminium cable breakpoint Download PDFInfo
- Publication number
- CN109490710A CN109490710A CN201811404709.2A CN201811404709A CN109490710A CN 109490710 A CN109490710 A CN 109490710A CN 201811404709 A CN201811404709 A CN 201811404709A CN 109490710 A CN109490710 A CN 109490710A
- Authority
- CN
- China
- Prior art keywords
- aluminium cable
- temperature
- cable
- breakpoint
- aluminium
- Prior art date
- 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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The present invention provides a kind of method for searching aluminium cable breakpoint: in the state that aluminium cable energization reaches at full capacity, temperature test is carried out to aluminium cable whole process using temperature measuring set, the high position of temperature is judged as de-energized, to make a mark, this method using aluminium cable breakpoint location because resistance is big generate heat the characteristics of determine aluminium cable breakpoint location, as long as the tool energy temperature sensor therefore used, it is not high to tool demands, operating process is across insulating layer, there is no operational risk, it is only needed when lookup whole with the inswept aluminium cable of temperature measuring set, search speed is very fast.
Description
Technical field
The present invention relates to a kind of technical field of electrical measurement, especially a kind of method for searching aluminium cable breakpoint.
Background technique
Cheap in view of aluminium cable at present, own wt is relatively light, is conducive to the characteristics of laying, at the construction field (site) face electricity
It is widely used in distribution system.But aluminum steel surface easily aoxidizes in air.All conductive surfaces all more or less exist
Film resistance.If film resistance causes junction to overheat, overheat increases film resistance again, and conductive condition more deteriorates, and aluminum steel connects
In this kind of overheat the case where be particularly acute.Even if it need to only expose the several seconds in air this is because the scraping of aluminum steel surface is bright and clean
Clock can be oxidized and form one layer of aluminum oxide film immediately.Though its thickness only several microns have very high resistivity,
To which biggish film resistance be presented.Due to biggish film resistance, cable local pyrexia will cause, accelerate aluminium cable again in this way
Oxidation, finally arrive the breakpoint that this part aluminium core was fully oxidized and caused cable, cable caused not to be available.Determining breakpoint
When not necessarily have apparent breakage due to cable skin, to cause breakpoint location confirmation difficult, such cable can only just be abandoned
One phase uses, and causes to waste.
It is many for the method for breakpoint of cable lookup in the prior art, such as:
Actinobolia.Induction electroprobe sum number word multimeter can be used；It is adapted to the cable of no metal armouring and steel band shielding；It infuses
Meaning prevents from getting an electric shock, and end when at test and with equipment after-combustion connects at electricity etc..
Capacitance method.When having the metal armor layers such as copper strips or steel band outside cable, actinobolia not can be carried out detection, at this time electricity consumption
Rong Fa；It is adapted to all cables；The principle of capacity measurement is first understood when with capacitance method --- when testing capacitor, in test loop
Use exchange/pulse signal.The above method can search the line breakpoint of all cables, have apparent practicability really.
But they perhaps have stringent operation requirement or operate more troublesome.
Summary of the invention
The present invention is intended to provide a kind of breakpoint lookup method of aluminium cable, the method is convenient and efficient, and operating process is without danger.
Technological means provided by the invention is:
A method of it searching aluminium cable breakpoint: in the state that aluminium cable energization reaches at full capacity, being measured using temperature
Instrument carries out temperature test to aluminium cable whole process, and the high position of temperature is judged as de-energized, to make a mark.
This method using aluminium cable breakpoint location because resistance is big generate heat the characteristics of determine aluminium cable breakpoint location, therefore
As long as the tool energy temperature sensor used, not high to tool demands.Operating process is not operate wind across insulating layer
Danger.It only needs to use the inswept aluminium cable of temperature measuring set whole when lookup, search speed is very fast.
Specific embodiment
The present invention utilizes the characteristics of temperature anomaly superelevation at aluminium cable breakpoint to judge breakpoint location, temperature measuring equipment hand-held
Temperature measuring set can be thus achieved.
This method is: in the state that aluminium cable energization reaches at full capacity, using temperature measuring set to aluminium cable whole process
Temperature test is carried out, the high position of temperature is judged as de-energized, to make a mark.
Interim distribution system can be mounted on after rechecking the aluminium cable newly purchased to suffer, and reach full in energization
The test for carrying out a temperature after load comprehensively to cable carries out the survey of temperature using hand-held temperature measuring set to cable whole process
Examination, and record temperature value.Hereafter just need electrician whole to cable using the temperature measuring set of hand-held in daily cable inspection
Temperature is monitored, and is compared in test temperature value before, such as finds that temperature anomaly point it is necessary to handle in time, avoids
Aluminium core at temperature anomaly generates breakpoint after all being aoxidized.
Such as use old cable, can also be used the method determine in advance cable with the presence or absence of at breakpoint, if there is and
When processing after reuse, if not finding breakpoint, the management during use is as above.
After cable accesses distribution system, all electrical equipments in system are opened simultaneously, guarantees that electricity consumption is most at this time
Big value is.Daily Round Check, electrician hold temperature measuring set, carry out temperature test to Integral cable, and record to temperature test value
Into the minute book of cable Daily Round Check, as inspection temperature in the future whether Yi Chang judgment basis.Power distribution system after measurement
Equipment in system can normal use.
Temperature anomaly is such as measured in inspection, that is just needed under the premise of not influencing normal construction, is carried out to heat generating spot
Processing.Specific processing method case technical staff's conventional method.Guarantee the normal power demands in scene, eliminates power failure pair suddenly
The influence of project progress.
Less investment of the present invention need to only buy the temperature measuring set of a hand-held；It implements simple and easy, only needs daily
The electrician of maintenance can be completed；Determine that position is accurate, it is obvious due to generating heat at breakpoint, it can find quickly, and timely everywhere
Reason avoids the economic loss as caused by power-off from magnifying.
Claims (1)
1. a kind of method for searching aluminium cable breakpoint, it is characterized in that: using temperature in the state that aluminium cable energization reaches at full capacity
It spends survey meter and temperature test is carried out to aluminium cable whole process, the high position of temperature is judged as de-energized, to make a mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811404709.2A CN109490710A (en) | 2018-11-23 | 2018-11-23 | The method for searching aluminium cable breakpoint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811404709.2A CN109490710A (en) | 2018-11-23 | 2018-11-23 | The method for searching aluminium cable breakpoint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109490710A true CN109490710A (en) | 2019-03-19 |
Family
ID=65696510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811404709.2A Withdrawn CN109490710A (en) | 2018-11-23 | 2018-11-23 | The method for searching aluminium cable breakpoint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109490710A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540360A (en) * | 2003-04-24 | 2004-10-27 | 新疆特变电工股份有限公司 | Test method for postioning fault point of low resistivity in cable |
| CN201302491Y (en) * | 2008-10-31 | 2009-09-02 | 国网武汉高压研究院 | Loop sensor for measuring temperature of cable conductor |
| CN103529348A (en) * | 2013-10-15 | 2014-01-22 | 林生得 | Fault monitoring method for high-voltage cable |
| CN104914367A (en) * | 2015-06-23 | 2015-09-16 | 广州供电局有限公司 | Quick fault positioning method for cable outer protective layer |
| CN106291247A (en) * | 2016-08-26 | 2017-01-04 | 广西玉柴机器股份有限公司 | A kind of electric wire breakpoint location detection method |
| CN107037310A (en) * | 2017-05-27 | 2017-08-11 | 重庆渝丰鑫新线缆科技有限公司 | The cable and its detecting system and detection method of breaking point detection can be carried out |
-
2018
- 2018-11-23 CN CN201811404709.2A patent/CN109490710A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1540360A (en) * | 2003-04-24 | 2004-10-27 | 新疆特变电工股份有限公司 | Test method for postioning fault point of low resistivity in cable |
| CN201302491Y (en) * | 2008-10-31 | 2009-09-02 | 国网武汉高压研究院 | Loop sensor for measuring temperature of cable conductor |
| CN103529348A (en) * | 2013-10-15 | 2014-01-22 | 林生得 | Fault monitoring method for high-voltage cable |
| CN104914367A (en) * | 2015-06-23 | 2015-09-16 | 广州供电局有限公司 | Quick fault positioning method for cable outer protective layer |
| CN106291247A (en) * | 2016-08-26 | 2017-01-04 | 广西玉柴机器股份有限公司 | A kind of electric wire breakpoint location detection method |
| CN107037310A (en) * | 2017-05-27 | 2017-08-11 | 重庆渝丰鑫新线缆科技有限公司 | The cable and its detecting system and detection method of breaking point detection can be carried out |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190319 |
|
| WW01 | Invention patent application withdrawn after publication |