CN207263869U - Low-voltage cable fault tester - Google Patents
Low-voltage cable fault tester Download PDFInfo
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- CN207263869U CN207263869U CN201721102114.2U CN201721102114U CN207263869U CN 207263869 U CN207263869 U CN 207263869U CN 201721102114 U CN201721102114 U CN 201721102114U CN 207263869 U CN207263869 U CN 207263869U
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- cable fault
- fault tester
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Abstract
The utility model provides a kind of low-voltage cable fault tester, the low-voltage cable fault tester includes pulse generating device and interception device, the pulse generating device is connected to cable under test, produce high-voltage pulse current, and produce at the breakpoint of cable under test and discharge over the ground, which intercepts the electric discharge sound over the ground of detective's pulse current.The low-voltage cable fault tester is avoided causes overtension or too low phenomenon using what gear selected；Using newest component, performance is improved while weight is mitigated.
Description
Technical field
Electric wire field of fault detection is the utility model is related to, especially relates to a kind of low-voltage cable fault test
Instrument.
Background technology
The cable of land burial often digs disconnected or digging injury by artificial in the construction process, and it is very numb manually to search breakpoint of cable
It is tired, if cable is short, buries than shallower, can use it is artificial by the way of all excavation connected again after finding the breakpoint of cable
Connect, but the time needed is longer, the fund of consuming is more.For some bury it is relatively deep, do not know trend or excavate into
The method of generally use is exactly the cable directly more renewed after this higher cable bad, this can greatly increase maintenance cost, have
When replace cable need it is tens of thousands of, ten tens of thousands of yuan.The common breakpoint of cable tester of in the market is generally more heavy, function
Also more, use functionally all includes breakpoint of cable inspection, moves towards the functions such as inspection, length detection and positioning mostly.Use
When usually require two people lift, detected for field very inconvenient.Often break down in production be in some, low tension
Cable, for moving towards to check, length check etc. these functions generally use less than, detecting instrument one is to cause as configuration
Waste functionally besides causes instrument more heavy.For this we have invented a kind of new low-voltage cable fault tester,
Solves above technical problem.
Utility model content
The purpose of this utility model is to provide a kind of low-voltage cable fault tester for being convenient for carrying site inspection.
The purpose of this utility model can be achieved by the following technical measures：Low-voltage cable fault tester, the low tension
Cable failure tester includes pulse generating device and interception device, which is connected to cable under test, produces high pressure
Pulse current, and produce at the breakpoint of cable under test and discharge over the ground, which intercepts putting over the ground for detective's pulse current
Electroacoustic sound.
The purpose of this utility model can be also achieved by the following technical measures：
The pulse generating device includes energy supply control module, high-pressure modular, voltage regulating module, rectification module and pulse module,
The switch of the energy supply control module pulse generating device in order to control, the high-pressure modular are connected to the energy supply control module, will
220V power boosts are up to 7000V, and to carry out electrion, which is connected to the high-pressure modular, to the high pressing mold
The voltage of block output is adjusted, and realizes the voltage adjusting from 0-7000V, which is connected to the voltage regulating module, by this
The ac high-voltage that voltage regulating module produces is changed into high direct voltage, which is connected to the rectification module, after rectification
High direct voltage produces pulse current.
The pulse generating device further includes earthing or grounding means, which is connected to the energy supply control module, by being fixed on
Ground connection fastening stake composition on shell, to be connected with the earth.
The pulse generating device further includes external power supply module, which is connected to the energy supply control module,
And external external power supply, break-make is controlled by the external power supply mould air switch in the block after external power supply access.
The energy supply control module further includes the indicator light for indicating the low-voltage cable fault tester working status, and protection
The protection circuit of the low-voltage cable fault tester.
The high-pressure modular includes high-tension transformer, and 220V power boosts are up to 7000V.
The voltage regulating module includes manual voltage regulator, is adjusted with the voltage exported to the high-pressure modular.
The rectification module includes high-voltage rectification silicon stack, and the ac high-voltage which produces is changed into high direct voltage.
The pulse module includes pulsed capacitance, which receives the high direct voltage of rectification module output, produces arteries and veins
Rush electric current output.
The interception device includes pickup module and headset, which is amplified the pulse signal of underground line,
The headset is connected to the pickup module, to intercept the pulse current of underground outflow discharging sound over the ground.
The pickup module is made of sound pick-up and amplifying circuit.
Low-voltage cable fault tester in the utility model, is detected, light, volume for the low-voltage cable of below 500V
Small easy to carry, weight can effectively mitigate the workload of testing staff within 10KG；0 to the seamless boostings of highest 7000V,
Voltage required for can arbitrarily adjusting number, avoid and cause overtension or too low phenomenon using what gear selected；Using
Newest component, performance is improved while weight is mitigated.
Brief description of the drawings
Fig. 1 is the structure chart of a specific embodiment of the low-voltage cable fault tester of the utility model；
Fig. 2 is the circuit diagram of pulse electric current-producing device in a specific embodiment of the invention.
Embodiment
To enable the above and other objects, features and advantages of the utility model to become apparent, it is cited below particularly go out preferably
Embodiment, and coordinate shown in attached drawing, it is described in detail below.
As shown in Figure 1, structure chart of the attached drawing for the low-voltage cable fault tester of the utility model.The low-voltage cable fault
Tester is made of pulse generating device 10,11 two large divisions of interception device.Pulse current generation device 10 is used to produce high pressure
Pulse current, and produce at breakpoint and discharge over the ground, interception device 11 is used for the electric discharge sound over the ground for intercepting detective's pulse current.
Pulse generating device 10 includes external power supply module 1, energy supply control module 2, high-pressure modular 4, voltage regulating module 5, whole
Flow module 6, pulse module 7 and earthing or grounding means 3.
Interception device 11 includes pickup module 8 and headset 9.
Energy supply control module 2, external 220V incoming calls are external power supply module 1, mainly by switch, indicator light, protection circuit
Composition, plays the role of control circuit switch, instruction and protection.
Earthing or grounding means 3 is connected to energy supply control module 2, by fix on the shell ground connection fastening stake form, play with greatly
Ground connects, the effect of security protection.
High-pressure modular 4 is connected to energy supply control module 2, by high-pressure modular 4 after power on, realizes that boosting is up to
7000V, for electrion.
Voltage regulating module 5 is connected to high-pressure modular 4, is mainly made of pressure regulator and interlock circuit, for output voltage
Adjustment, realizes the voltage adjusting from 0-7000V.
Rectification module 6 is connected to voltage regulating module 5, is made of high-voltage rectification silicon stack interlock circuit, and effect is by voltage regulating module
The alternating current of output is changed into DC current.
Pulse module 7 is connected to rectification module 6, and effect is to produce the high direct voltage after rectification by circuits such as pulsed capacitances
Raw pulse current.
Pickup module 8, is mainly made of sound pick-up and related amplifying circuit, can be put the pulse signal of underground line
Greatly.
Headset 9 is connected to pickup module 8, for intercepting the pulse current discharging sound over the ground of underground outflow.
As shown in Fig. 2, attached drawing produces the circuit of part for the low-voltage cable fault tester pulse current of the utility model
Figure.
External power supply module 1 uses air switch QF control break-makes to connect external power supply after plant-grid connection；
Energy supply control module 2 is connected with external power supply module 1, the actuation of internal circuit during controlling external power supply,
It is made of start button KA and stop button KM and indicator light LED；
Grounded part 3 being reliably connected over the ground；
High-pressure modular 4 and voltage regulating module 5 are connected with power control part, to the adjusting of high-low voltage, high-pressure modular 4
Input power is produced into high pressure through high pressure T1 transformers, then required voltage T2 is adjusted to by manual voltage regulator, to produce
High pressure and the effect for adjusting voltage；
Rectification module 6 is connected with voltage regulating module 5, is mainly made of circuits such as high-voltage rectification silicon stacks, by the friendship after adjustment
Galvanic electricity stream T2 is converted to the effect of high direct voltage V；
Pulse module 7 is connected with rectification module 6, is mainly made of pulsed capacitance C and interlock circuit, by high direct voltage V
It is input in impulse capacitor C, produces pulse current output.
The low-voltage cable fault tester of the utility model when in use, first by the equipment of the survey line cable break-make such as megger
Detect that failure occurs in which root cable, then breakpoint of cable tester powers on, by connection output line and survey electricity
Cable is connected, and shell is carried out reliable ground, is turned on the power switch, high-tension transformer is brought the voltage up to highest after powering on
7000V, is adjusted to required voltage, high-voltage rectification silicon stack by pressure regulator alternating current being converted to direct current, high-voltage pulse electric
After holding storage to required voltage, pulse current is produced by electric discharge device, that is, impulse-capacitor discharge of setting, in breakpoint of cable
Place produces electric spark over the ground, and sends discharging sound sound, passes through of short duration accumulation of energy again to required voltage after high-voltage capacitance electric discharge
Discharge again afterwards, it is so lasting that electric spark is produced at breakpoint of cable.Inspection personnel wears headset and snooping equipment is sought along sound
Sound maximum point is looked for, the sound maximum for determining to discharge over the ground is breakpoint of cable.
Claims (11)
1. low-voltage cable fault tester, it is characterised in that the low-voltage cable fault tester includes pulse generating device and detects
Device for tone frequencies, the pulse generating device are connected to cable under test, produce high-voltage pulse current, and produced at the breakpoint of cable under test
Discharge over the ground, which intercepts the electric discharge sound over the ground of detective's pulse current.
2. low-voltage cable fault tester according to claim 1, it is characterised in that the pulse generating device includes power supply
Control module, high-pressure modular, voltage regulating module, rectification module and pulse module, the energy supply control module pulses generation in order to control
The switch of device, the high-pressure modular are connected to the energy supply control module, and 220V power boosts are up to 7000V, to carry out height
Electricity is pressed, which is connected to the high-pressure modular, and the voltage of high-pressure modular output is adjusted, is realized from 0-
The voltage of 7000V is adjusted, which is connected to the voltage regulating module, the ac high-voltage which produces is changed into directly
High pressure is flowed, which is connected to the rectification module, and pulse current is produced according to the high direct voltage after rectification.
3. low-voltage cable fault tester according to claim 2, it is characterised in that the pulse generating device, which further includes, to be connect
Ground device, the earthing or grounding means are connected to the energy supply control module, by fix on the shell ground connection fastening stake form, with the earth
Connection.
4. low-voltage cable fault tester according to claim 2, it is characterised in that the pulse generating device further includes outer
Power module is connect, which is connected to the energy supply control module, and external external power supply, leads to after external power supply access
The external power supply mould air switch in the block is crossed to control break-make.
5. low-voltage cable fault tester according to claim 2, it is characterised in that the energy supply control module further includes finger
Show the indicator light of the low-voltage cable fault tester working status, and protect the protection electricity of the low-voltage cable fault tester
Road.
6. low-voltage cable fault tester according to claim 2, it is characterised in that the high-pressure modular includes high pressure transformation
Device, 7000V is up to by 220V power boosts.
7. low-voltage cable fault tester according to claim 2, it is characterised in that the voltage regulating module includes manual voltage regulation
Device, is adjusted with the voltage exported to the high-pressure modular.
8. low-voltage cable fault tester according to claim 2, it is characterised in that the rectification module includes high-voltage rectifying
Silicon stack, is changed into high direct voltage by the ac high-voltage that the voltage regulating module produces.
9. low-voltage cable fault tester according to claim 2, it is characterised in that the pulse module includes pulse electricity
Hold, which receives the high direct voltage of rectification module output, produces pulse current output.
10. low-voltage cable fault tester according to claim 1, it is characterised in that the interception device includes pickup mould
The pulse signal of underground line is amplified by block and headset, the pickup module, which is connected to the pickup module, to intercept
The pulse current discharging sound over the ground of underground outflow.
11. low-voltage cable fault tester according to claim 10, it is characterised in that the pickup module by sound pick-up and
Amplifying circuit forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721102114.2U CN207263869U (en) | 2017-08-30 | 2017-08-30 | Low-voltage cable fault tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721102114.2U CN207263869U (en) | 2017-08-30 | 2017-08-30 | Low-voltage cable fault tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207263869U true CN207263869U (en) | 2018-04-20 |
Family
ID=61922820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721102114.2U Active CN207263869U (en) | 2017-08-30 | 2017-08-30 | Low-voltage cable fault tester |
Country Status (1)
| Country | Link |
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| CN (1) | CN207263869U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342870A (en) * | 2018-11-15 | 2019-02-15 | 贵州电网有限责任公司 | A kind of trouble-shooter applied to 10KV network distribution transformer |
-
2017
- 2017-08-30 CN CN201721102114.2U patent/CN207263869U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342870A (en) * | 2018-11-15 | 2019-02-15 | 贵州电网有限责任公司 | A kind of trouble-shooter applied to 10KV network distribution transformer |
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