CN108627727A - The detection device and detection method of the disconnected core of electric LHD Randomized Cable - Google Patents
The detection device and detection method of the disconnected core of electric LHD Randomized Cable Download PDFInfo
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- CN108627727A CN108627727A CN201710154688.2A CN201710154688A CN108627727A CN 108627727 A CN108627727 A CN 108627727A CN 201710154688 A CN201710154688 A CN 201710154688A CN 108627727 A CN108627727 A CN 108627727A
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- filter
- earth wire
- wire detector
- cable
- distribution cabinet
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The present invention provides a kind of detection device and detection method of the disconnected core of electric LHD Randomized Cable.The present invention includes the power distribution cabinet being connected in turn on main circuit power supply, equipment control cabinet and electric LHD electric appliance; the zero sequence current mutual inductor being connected on the main circuit power supply is provided with inside the power distribution cabinet; the zero sequence current mutual inductor connects earth leakage protective device; it is provided with main switch on the main circuit power supply; it is provided with first filter in the power distribution cabinet; be provided with inside the equipment control cabinet with the earth wire detector second filter, be parallel with third filter in the first filter or the second filter.The present invention can check whether threephase cable and ground wire disconnect square wave and pass phase failure protector back by ground wire, and phase failure protector judges the whether disconnected core of cable to lock failure by according to the variation for passing square wave back.
Description
Technical field：
The present invention relates to the detection devices and detection method of a kind of disconnected core of electric LHD Randomized Cable, belong to electromechanical equipment detection
Technical field.
Background technology：
Electric LHD is the most important back production ore removal equipment in underground, and dipper capacity is big, and failure rate is low, is downhole production yield
Important guarantee.The equipment using 1000V power supplys as power source, however in production cable with electric LHD front and back row
It walks, rotates the cable rolling disk of scraper, carry out retractable cable, since cable is in operation process, always all in energized state, electricity
The operating environment of power scraper machine is again very severe, and in equipment moving process, and is constantly impacted by external force, easily causes
Cable core break damages equipment, however cable core break failure is not easy accurate judgement, when earth leakage protective cabinet main switch trips
When, it can not specifically judge the event of cable fault or protector itself failure or plug, slip ring, main switch in equipment
Barrier.It will often be checked item by item all these when breaking down, it is time-consuming and laborious, fault point can't be specifically found sometimes,
It causes accidentally to replace spare part, has delayed production, wasted cost.
Invention content
The purpose of the present invention is provide a kind of detection of the disconnected core of electric LHD Randomized Cable in view of the above problems
Device and detection method, can check whether threephase cable and ground wire disconnect square wave and pass phase failure protector back by ground wire, break and mutually protect
Shield device judges the whether disconnected core of cable to lock failure by according to the variation for passing square wave back.
Above-mentioned purpose is achieved through the following technical solutions：
Electric LHD Randomized Cable break core detection device, including be connected in turn on main circuit power supply power distribution cabinet, equipment
Switch board and electric LHD electric appliance, power distribution cabinet the inside are provided with the zero sequence electricity being connected on the main circuit power supply
Current transformer, the zero sequence current mutual inductor connect earth leakage protective device, are provided with main switch on the main circuit power supply, institute
It is provided with first filter in the power distribution cabinet stated, is provided with and the earth wire detector second inside the equipment control cabinet
It is parallel with third filter in filter, the first filter or the second filter.
The method for carrying out cable core break detection with the detection device of the disconnected core of above-mentioned electric LHD Randomized Cable, this method packet
It includes：
Two filters are set in the power distribution cabinet and equipment control cabinet, and earth wire detector is believed by exporting 4 k H z square waves
Number, through first filter, main circuit power supply to second filter, then through ground wire return earth wire detector, by sending out and returning
The comparison of letter in reply number, checks whether threephase cable and ground wire disconnect, if thering is any phase or two-phase to disconnect in three-phase power line,
Then sending out cannot be completely the same with return signal, when earth wire detector monitors that the duration that ground wire disconnects is more than for the first time
When monitoring the 1/4 of break time for the second time, earth wire detector tripping；If disconnected or ground wire is disconnected entirely for three-phase power line,
Without return signal, breaking protection is played the role of in earth wire detector tripping；
After breaking protection works, when judging power distribution cabinet front end cable core break, the third filtering in parallel in first filter
Device checks whether the indicator light of earth wire detector is normal, judges whether first filter is normal, after first filter is normal, give
Earth wire detector power transmission, earth wire detector export 4 k H z square-wave signals, through first filter directly by third filter into
Row signal compares, and returns to earth wire detector, and the second filter in equipment does not work at this time, only watches the instruction of earth wire detector
Whether lamp is normal, can detect electric LHD power distribution cabinet front end cable core break；
It is in parallel in the second filter of equipment control cabinet when judging core disconnected with equipment Randomized Cable after breaking protection works
One third filter, third filter ground wire are connected on earth wire detector, give earth wire detector power transmission, earth wire detector output
4 k H z square-wave signals, through the first filter in power distribution cabinet, main circuit power supply to the second filter in equipment STOCHASTIC CONTROL cabinet
Wave device and third filter, then earth wire detector is returned through ground wire, by sending out the comparison with return signal, viewing ground wire inspection
Whether the indicator light for surveying device is normal, the quality of detectable second filter and detects that electric LHD Randomized Cable breaks core.
Advantageous effect：
Method using the present invention can check whether threephase cable and ground wire disconnect square wave and pass open-phase protection back by ground wire
Device, phase failure protector judge the whether disconnected core of cable to lock failure, detection method is simply accurate by according to the variation for passing square wave back
Really.
Description of the drawings
Fig. 1 is detection device circuit diagram of the present invention in the disconnected core of the electric LHD Randomized Cable.
Fig. 2 is the circuit diagram of the present invention one third filter of parallel connection in first filter.
Fig. 3 is the circuit diagram that the present invention distinguishes a third filter in parallel in second filter.
In figure：L 1, L 2,3 main circuit power supplies of L, Q 2 are main switch, and K 1 is earth leakage protective device, and H is that electric leakage refers to
Show that lamp, K2 are earth wire detector.
Specific implementation mode
With reference to embodiment, the present invention is furture elucidated, it should be understood that following specific implementation modes are only used for
It is bright the present invention rather than limit the scope of the invention.
Embodiment 1：
The detection device of core as shown in Figure 1, the electric LHD Randomized Cable of the present embodiment breaks, including it is connected to power supply master in turn
Power distribution cabinet, equipment control cabinet on circuit and electric LHD electric appliance, be provided with inside the power distribution cabinet be connected to it is described
Zero sequence current mutual inductor on main circuit power supply, the zero sequence current mutual inductor connect earth leakage protective device, the power supply master
It is provided with main switch on circuit, first filter is provided in the power distribution cabinet, is provided with inside the equipment control cabinet
With the earth wire detector second filter, third is parallel in the first filter or the second filter
Filter.
The method for carrying out cable core break detection with the detection device of the disconnected core of above-mentioned electric LHD Randomized Cable, this method packet
It includes：
First filter is set in the power distribution cabinet, and earth wire detector is by exporting 4 k H z square-wave signals, through the first filter
Wave device, main circuit power supply return to earth wire detector to second filter, then through ground wire, by sending out and the ratio of return signal
Compared with whether inspection threephase cable and ground wire disconnect, if having any phase or two-phase to disconnect in three-phase power line, send out and return
Letter in reply number cannot be completely the same, when earth wire detector monitors that the duration that ground wire disconnects is more than second of monitoring for the first time
To break time 1/4 when, earth wire detector tripping；If disconnected or ground wire is disconnected entirely for three-phase power line, no return letter
Number, breaking protection is played the role of in earth wire detector tripping；
Embodiment 2：
The detection device of core as shown in Fig. 2, the electric LHD Randomized Cable of the present embodiment breaks, including it is connected to power supply master in turn
Power distribution cabinet, equipment control cabinet on circuit and electric LHD electric appliance, be provided with inside the power distribution cabinet be connected to it is described
Zero sequence current mutual inductor on main circuit power supply, the zero sequence current mutual inductor connect earth leakage protective device, the power supply master
It is provided with main switch on circuit, first filter is provided in the power distribution cabinet, is provided with inside the equipment control cabinet
The earth wire detector second filter being connect with the current supply circuit.
The method for carrying out cable core break detection with the detection device of the disconnected core of above-mentioned electric LHD Randomized Cable, this method packet
It includes：
After breaking protection works, when judging power distribution cabinet front end cable core break, the third filtering in parallel in first filter
Device checks whether the indicator light of earth wire detector is normal, judges whether first filter is normal, after first filter is normal, give
Earth wire detector power transmission, earth wire detector export 4 k H z square-wave signals, through first filter directly by third filter into
Row signal compares, and returns to earth wire detector, and the second filter in equipment does not work at this time, only watches the instruction of earth wire detector
Whether lamp is normal, can detect electric LHD power distribution cabinet front end cable core break；
Embodiment 3：
The detection device of core as shown in figure 3, the electric LHD Randomized Cable of the present embodiment breaks, including it is connected to power supply master in turn
Power distribution cabinet, equipment control cabinet on circuit and electric LHD electric appliance, be provided with inside the power distribution cabinet be connected to it is described
Zero sequence current mutual inductor on main circuit power supply, the zero sequence current mutual inductor connect earth leakage protective device, the power supply master
It is provided with main switch on circuit, first filter is provided in the power distribution cabinet, is provided with inside the equipment control cabinet
The earth wire detector second filter being connect with the current supply circuit.
The method for carrying out cable core break detection with the detection device of the disconnected core of above-mentioned electric LHD Randomized Cable, this method packet
It includes：
It is in parallel in the second filter of equipment control cabinet when judging core disconnected with equipment Randomized Cable after breaking protection works
One third filter, third filter ground wire are connected on earth wire detector, give earth wire detector power transmission, earth wire detector output
4 k H z square-wave signals, through the first filter in power distribution cabinet, main circuit power supply to the second filter in equipment STOCHASTIC CONTROL cabinet
Wave device and third filter, then earth wire detector is returned through ground wire, by sending out the comparison with return signal, viewing ground wire inspection
Whether the indicator light for surveying device is normal, the quality of detectable second filter and detects that electric LHD Randomized Cable breaks core.
Claims (2)
- The detection device of core 1. a kind of electric LHD Randomized Cable breaks, it is characterized in that：Including being connected to main circuit power supply in turn On power distribution cabinet, equipment control cabinet and electric LHD electric appliance, be provided with inside the power distribution cabinet and be connected to the power supply Zero sequence current mutual inductor on major loop, the zero sequence current mutual inductor connect earth leakage protective device, the main circuit power supply On be provided with main switch, be provided with first filter in the power distribution cabinet, be provided with inside the equipment control cabinet and institute Third filtering is parallel in the earth wire detector second filter stated, the first filter or the second filter Device.
- 2. a kind of method that detection device with the disconnected core of above-mentioned electric LHD Randomized Cable carries out cable core break detection, feature It is：This method includes：Two filters are set in the power distribution cabinet and equipment control cabinet, and earth wire detector is believed by exporting 4 k H z square waves Number, through first filter, main circuit power supply to second filter, then through ground wire return earth wire detector, by sending out and returning The comparison of letter in reply number, checks whether threephase cable and ground wire disconnect, if thering is any phase or two-phase to disconnect in three-phase power line, Then sending out cannot be completely the same with return signal, when earth wire detector monitors that the duration that ground wire disconnects is more than for the first time When monitoring the 1/4 of break time for the second time, earth wire detector tripping；If disconnected or ground wire is disconnected entirely for three-phase power line, Without return signal, breaking protection is played the role of in earth wire detector tripping；After breaking protection works, when judging power distribution cabinet front end cable core break, the third filtering in parallel in first filter Device checks whether the indicator light of earth wire detector is normal, judges whether first filter is normal, after first filter is normal, give Earth wire detector power transmission, earth wire detector export 4 k H z square-wave signals, through first filter directly by third filter into Row signal compares, and returns to earth wire detector, and the second filter in equipment does not work at this time, only watches the instruction of earth wire detector Whether lamp is normal, can detect electric LHD power distribution cabinet front end cable core break；It is in parallel in the second filter of equipment control cabinet when judging core disconnected with equipment Randomized Cable after breaking protection works One third filter, third filter ground wire are connected on earth wire detector, give earth wire detector power transmission, earth wire detector output 4 k H z square-wave signals, through the first filter in power distribution cabinet, main circuit power supply to the second filter in equipment STOCHASTIC CONTROL cabinet Wave device and third filter, then earth wire detector is returned through ground wire, by sending out the comparison with return signal, viewing ground wire inspection Whether the indicator light for surveying device is normal, the quality of detectable second filter and detects that electric LHD Randomized Cable breaks core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154688.2A CN108627727A (en) | 2017-03-15 | 2017-03-15 | The detection device and detection method of the disconnected core of electric LHD Randomized Cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710154688.2A CN108627727A (en) | 2017-03-15 | 2017-03-15 | The detection device and detection method of the disconnected core of electric LHD Randomized Cable |
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| CN108627727A true CN108627727A (en) | 2018-10-09 |
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| CN201710154688.2A Pending CN108627727A (en) | 2017-03-15 | 2017-03-15 | The detection device and detection method of the disconnected core of electric LHD Randomized Cable |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132355Y (en) * | 1992-09-01 | 1993-05-05 | 邱礼儒 | Wire breakage detector |
| CN201408238Y (en) * | 2009-04-17 | 2010-02-17 | 武汉市黄鹤电线电缆一厂 | Square wave cable wire breakage position indicator |
| CN101957422A (en) * | 2010-09-29 | 2011-01-26 | 南京梅山冶金发展有限公司 | Cable breakpoint fault rapid searching instrument and searching method thereof |
| CN203069718U (en) * | 2012-12-24 | 2013-07-17 | 上海梅山钢铁股份有限公司 | Cable line detection device |
| CN204789848U (en) * | 2015-06-23 | 2015-11-18 | 徐工集团工程机械股份有限公司 | Electronic underground scraper cable safety monitoring system |
-
2017
- 2017-03-15 CN CN201710154688.2A patent/CN108627727A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132355Y (en) * | 1992-09-01 | 1993-05-05 | 邱礼儒 | Wire breakage detector |
| CN201408238Y (en) * | 2009-04-17 | 2010-02-17 | 武汉市黄鹤电线电缆一厂 | Square wave cable wire breakage position indicator |
| CN101957422A (en) * | 2010-09-29 | 2011-01-26 | 南京梅山冶金发展有限公司 | Cable breakpoint fault rapid searching instrument and searching method thereof |
| CN203069718U (en) * | 2012-12-24 | 2013-07-17 | 上海梅山钢铁股份有限公司 | Cable line detection device |
| CN204789848U (en) * | 2015-06-23 | 2015-11-18 | 徐工集团工程机械股份有限公司 | Electronic underground scraper cable safety monitoring system |
Non-Patent Citations (1)
| Title |
|---|
| 王新钢 等: "山特维克电动铲运机的电气安全保护系统浅析", 《现代矿业》 * |
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Application publication date: 20181009 |
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