CN107907795A - A kind of method and system of cable maintenance - Google Patents
A kind of method and system of cable maintenance Download PDFInfo
- Publication number
- CN107907795A CN107907795A CN201711321580.4A CN201711321580A CN107907795A CN 107907795 A CN107907795 A CN 107907795A CN 201711321580 A CN201711321580 A CN 201711321580A CN 107907795 A CN107907795 A CN 107907795A
- Authority
- CN
- China
- Prior art keywords
- cable
- current
- current collector
- examination
- repair system
- 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.)
- Pending
Links
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
Abstract
The invention discloses a kind of cable examination and repair system, including current feedback circuit, the first current collector, the first Current Display, the second current collector and the second Current Display；The first current collector and current feedback circuit are connected with the first object cable of cable source, the current value of the first current collector collection is obtained by the first Current Display being connected with the first current collector, and the second current collector is connected with the second target cable of section in the cable, the current value of the second current collector collection is obtained by the second Current Display being connected with the second current collector.If the current value that current value and the first Current Display that the second Current Display obtains obtain meets the requirements, the second i.e. current target cable is failure cable, the system can fast and accurately determine whether the second target cable breaks down, and improve overhaul efficiency and maintenance accuracy.In addition, the invention also discloses a kind of method of cable maintenance, effect is as above.
Description
Technical field
The present invention relates to cable to overhaul field, more particularly to a kind of method and system of cable maintenance.
Background technology
Height voltage cable using quite varied, and arranged and concentrated in every profession and trade, enterprise, especially after cable side outlet,
Intensive by the mode cable parallel laying such as cable testing bridge, raceway groove and direct-burried, for long-distance cable, some can reach
Certain tens kilometers long and middle section has connector.
Because maintenance and defect elimination need, these cables are handled sometimes for choosing a certain position from middle certain section and break
(such as reforming transition joint), but many cable parallel layings, it is the cable that maintenance has a power failure that can not determine which root, which is
The live electric cable of operation, once broken mistake not only results in unrelated equipment tripping, goes back entail dangers to personal safety.For example, certain power plant examines
It is low to repair a piece high-voltage cable insulating of middle discovery, and laying in passage has a transition joint crust to make moist, in tentatively suspecting at this
Between connector belong to this cable, and the reason for insulating properties is low, is probably herein, since other cables are all in passage
Running and can not have a power failure, power plant had set up nearly hundred meters of scaffold at switch along laying passage at that time, arranged personnel along electricity
Cable mains side is touched at transition joint, just determines that transition joint is exactly the low cable of insulating properties at this, when during which consuming a large amount of
Between, manpower and material.And it is only suitable for short distance cable using what manpower hand was touched, for several kilometers even more than ten kilometers of electricity
Cable, even for the cable of direct-burried, this mode is at all infeasible.In addition, certain power plant needs the centre section to a certain cable
Position breaks maintenance, verifies whether cable is powered, has broken other live electric cables by mistake completely due to no, causes personnel's wound
Die, while cause operation cable grounding, unit tripping.
At present, for above-mentioned produced problem, using in the cable laying of capital construction phase, to certain section of exemplary position among cable
(such as transition joint, corner) carries out cable name identification；Or electrical verification rod is sensed to certain section among cable of crust with high-low pressure
Carry out electrical verification；Or at cable source, touched by manpower hand to middle certain section of place, confirm that the position belongs to the cable.But base
The phase cable laying of building belongs to concealed work, also the always difficult point of inspection of quality, first, between many enterprises do not accomplish in the cable
Certain section of exemplary position (such as transition joint, corner) carries out cable name identification, second, even if transition joint, corner have mark
Know, since fuzzy, loss or capital construction phase just paste mistake, there are risk；Third, tagged be also only limitted to transition joint, corner,
Just do not identified for other positions, particularly with direct-buried cable, this method is more infeasible.Secondly tested with high-low pressure sensing
Torch carries out electrical verification to certain section among cable of crust, and this mode is verified by non-direct contact, poor sensitivity,
And when many cables concentrate in together, for crane span structure, cable duct, artificial hand touch take considerable time, manpower, also need sometimes
Add and set up a large amount of scaffolds, but also the carelessness for being likely due to people causes to confirm by mistake；For direct-buried cable, over long distances electricity
Cable, the method are infeasible.
It can be seen from the above that during how overcoming long range multi-cable being overhauled, overhaul efficiency and maintenance are accurate
The problem of property is low is those skilled in the art's urgent problem to be solved.
The content of the invention
The embodiment of the present application provides a kind of method and system of cable maintenance, to solve in the prior art to more over long distances
During root cable is overhauled, overhaul efficiency with maintenance accuracy it is low the problem of.
In order to solve the above technical problems, the present invention provides a kind of method of cable maintenance, including：
Current feedback circuit, the first current collector, the first Current Display, the second current collector and the second electric current are shown
Device；
The first object cable connection of first current collector and the current feedback circuit with cable source, it is described
First Current Display is connected with first current collector to obtain described the first of the first current collector collection
The current value of target cable；
Second current collector is connected with second target cable in cable stage casing, second Current Display and institute
The connection of the second current collector is stated to obtain the current value of second target cable of the second current collector collection；Institute
Current feedback circuit is stated to be used to provide electric current for the first object cable and second target cable.
Preferably, first current collector is specially the first current transformer.
Preferably, it is the first wafer type zero sequence current mutual inductor that first current transformer is specific.
Preferably, second current collector is specially the second current transformer.
Preferably, it is the second wafer type zero sequence current mutual inductor that second current transformer is specific.
Preferably, first Current Display and second Current Display are ammeter.
Preferably, further include：
The alarm module being connected with the current feedback circuit, the alarm module are used for when event occurs for the current feedback circuit
Hinder alarm prompting.
Preferably, further include：
The range sensor being connected respectively with the current feedback circuit and the alarm module, the range sensor are used for
The distance between user and the current feedback circuit are gathered, when the distance is prompted less than threshold value alarm.
Preferably, the alarm module is specially buzzer and/or indicator light.
In order to solve the above technical problems, present invention also offers a kind of side of cable maintenance corresponding with cable examination and repair system
Method, based on above-mentioned cable examination and repair system, including：
When cable powers off, obtain respectively the first object cable of cable source the first current value and cable stage casing the
Second current value of two target cables；
Judge first current value and second current value whether in given threshold；
If it is, second target cable of characterization currently breaks down；
If it is not, then second target cable of characterization currently does not break down.
Compared with the prior art, a kind of cable examination and repair system provided by the present invention, including current feedback circuit, the first electric current
Collector, the first Current Display, the second current collector and the second Current Display；In the first object cable of cable source
On be connected with the first current collector and current feedback circuit, obtained by the first Current Display being connected with the first current collector
The current value of the first object cable of the first current collector collection is taken, and is connected in the cable in the second target cable of section
There is the second current collector, obtaining the second current collector by the second Current Display being connected with the second current collector adopts
The current value of second target cable of collection, current feedback circuit are used to provide electric current for first object cable and the second target cable.
The system, on some cable (the second target cable) for the middle section position of multi-cable for needing to overhaul connecting the second electric current adopts
Storage, if current value and the first Current Display that the second Current Display being connected at this time with the second current collector obtains
The current value of acquisition meets the requirements, and just illustrates that first object cable and the second target cable are same root cable, this means that
The second current target cable is exactly the cable to break down, which can fast and accurately determine in cable
Which root cable in section is failure cable, and then can improve overhaul efficiency when being overhauled to long range multi-cable and inspection
Repair accuracy.In addition present invention also offers a kind of method of cable maintenance, effect is as above.
Brief description of the drawings
A kind of structure diagram for cable examination and repair system that Fig. 1 is provided by the embodiment of the present invention；
The method flow diagram that a kind of cable that Fig. 2 is provided by the embodiment of the present invention overhauls.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution in the embodiment of the present application is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained on the premise of creative work is not made it is all its
Its embodiment, belongs to the scope of protection of the invention.
The core of the present invention is to provide a kind of method and system of cable maintenance, can solve to long range multi-cable into
Row maintenance during, overhaul efficiency and overhaul accuracy it is low the problem of.
In order to make those skilled in the art more fully understand the solution of the present invention, below in conjunction with the accompanying drawings and specific embodiment party
The present invention is described in further detail for formula.
A kind of structure diagram for cable examination and repair system that Fig. 1 is provided by the embodiment of the present invention, as shown in Figure 1, including：
Current feedback circuit 10, the first current collector 11, the first Current Display 12, the second current collector 13 and second
Current Display 14；The first object cable connection of first current collector 11 and current feedback circuit 10 with cable source, the
One Current Display 12 is connected with the first current collector 11 to obtain the first object cable of the first current collector 11 collection
Current value；Second current collector 13 is connected with second target cable in cable stage casing, the second Current Display 14 and second
Current collector 13 is connected to obtain the current value for the second target cable that the second current collector 13 gathers；Current feedback circuit 10
For providing electric current for first object cable and the second target cable.
When certain root cable breaks down, service personnel installs electric current hair first on the first object cable of cable source
10 and first current collector 11 of raw device, first object cable is the cable to have broken down found in cable source, and
In order to obtain the current value of the first object cable of the first current collector 11 collection, it is connected with the first current collector 11
First Current Display 12, because electric service personnel knows which root cable of cable source is failure cable (first object electricity
Cable), so the equipment in the installation of cable source need not move；The cable that general enterprises use is mostly long, and
Number also compares more, there is the reason for connector, cable fault mostly fragment position in the cable in the stage casing position of every cable
Joint, so when service personnel overhauls cable, it is necessary to find middle joint corresponding with first object cable,
At this moment second current collector 13 is installed in the second target cable at section in the cable, and connected on the second current collector 13
The second Current Display 14 is connect to obtain the current value of the second target cable of the second current collector 13 collection, because in cable
Middle section position have multi-cable, so the second current collector 13 needs to move in real time, specially the second electric current is adopted first
Storage 13 is installed on a certain cable (the second target cable), is obtained by the second Current Display 14 in the second target cable
Current value, if the current value that the current value obtained at this time and the first Current Display 12 obtain is generally equalized after conversion
(error is in allowed band), it is exactly failure electricity at this moment just to illustrate the second target cable being connected with the second current collector 13
Cable, service personnel start building here；If the current value that the current value obtained at this time and the first Current Display 12 obtain
It is undesirable after conversion, i.e. differ greatly (error exceeds allowed band), at this moment just illustrate current between two current values
The second target cable being connected with the second current collector 13 is not the cable to break down, need to detect verification again, at this time only
Second current collector 13 is connected with next second target cable of cable middle section position, repeat the above method after
It is continuous to distinguish, untill finding failure cable.It should be noted that if the current value that the second Current Display 14 obtains is
Zero, the second target cable detected at this time is not necessarily failure cable.
First current collector 11 and the second current collector 13, the first Current Display 12 and the second Current Display 14
Model can be the same or different, it is easy to operate when simply selecting identical model.It is understood that the first electric current is adopted
11 and second current collector 13 of storage, the first Current Display 12 and the second Current Display 14 are according to custom and hobby life
Name, it is intended merely to distinguish current collector and Current Display, not particular meaning, their naming method is not solid
Fixed constant, certainly, the first current collector 11 and the second current collector 13, the first Current Display 12 and the second electric current are shown
The realization of the embodiment of the present application can't be influenced by showing the naming method of device 14.
A kind of cable examination and repair system provided by the present invention, including current feedback circuit, the first current collector, the first electric current
Display, the second current collector and the second Current Display；The first electricity is connected with the first object cable of cable source
Collector and current feedback circuit are flowed, the first current acquisition is obtained by the first Current Display being connected with the first current collector
The current value of the first object cable of device collection, and in the cable the second current acquisition is connected with the second target cable of section
Device, the second target electricity of the second current collector collection is obtained by the second Current Display being connected with the second current collector
The current value of cable, current feedback circuit are used to provide electric current for first object cable and the second target cable.The system, is needing to examine
Connect the second current collector on some cable (the second target cable) of the middle section position for the multi-cable repaiied, if at this time with
The current value that the current value and the first Current Display that second Current Display of the second current collector connection obtains obtain is equal
Meet the requirements, just illustrate that first object cable and the second target cable are same root cable, this means that the second current target
Cable is exactly the cable to break down, which can fast and accurately determine which root cable in cable stage casing
For failure cable, and then overhaul efficiency when being overhauled to long range multi-cable and maintenance accuracy can be improved.
On the basis of above-described embodiment, preferably embodiment, the first current collector 11 are specially the first electricity
Current transformer.
The first current collector 11 selects the first current transformer in the embodiment of the present application, can gather connected
The current value of first object cable, preferably the first current transformer are specifically the first wafer type zero sequence current mutual inductor, to folder
Formula zero sequence current mutual inductor is easy for installation.
On the basis of above-described embodiment, preferably embodiment, the second current collector 13 are specially the second electricity
Current transformer.
The second current collector 13 selects the second current transformer in the embodiment of the present application, can gather connected
The current value of second target cable, preferably the second current transformer are specifically the first wafer type zero sequence current mutual inductor, to folder
Formula zero sequence current mutual inductor is easy for installation.
On the basis of above-described embodiment, preferably embodiment, the first Current Display 12 and the second electric current are shown
It is ammeter to show device 14.
In order to facilitate calculating, the first Current Display 12 and the second Current Display 14 are preferably ammeter.
It is understood that current transformer can also be it in addition to it can be wafer type zero sequence current mutual inductor
It accords with desired current transformer, and the first Current Display 12 and the second Current Display 14 may be used also in addition to being ammeter
To be other satisfactory Current Displays, and invention does not limit, certainly, the class of current transformer and Current Display
Type can't influence the realization of the embodiment of the present application.
On the basis of above-described embodiment, preferably embodiment, further includes：
The alarm module being connected with current feedback circuit 10, alarm module are used for when the current feedback circuit alarm that breaks down carries
Show.
Current feedback circuit 10 breaks down and influences maintenance of the service personnel to cable in order to prevent, further includes and is sent out with electric current
The alarm module that raw device 10 connects, the relevant personnel can be reminded in time when current feedback circuit 10 breaks down.
On the basis of above-described embodiment, preferably embodiment, further includes：
The range sensor being connected respectively with current feedback circuit 10 and alarm module, range sensor be used for gather user with
The distance between current feedback circuit, is prompted when distance is less than threshold value alarm.
The current feedback circuit 10, the first current collector 11 and the first electric current for being installed on cable source in order to prevent are shown
Device 12 is dismantled by unidentified people, so a range sensor is connected on current feedback circuit 10, and in range sensor
Upper connection alarm module, is just carried when the distance of range sensor collection is less than threshold value set in advance by alarm module alarm
It is shown with and closes staff.Preferably, alarm module can select buzzer and/or indicator light.Certain alarm module can also be
Other satisfactory devices, in this not go into detail.
It is described in detail above for a kind of embodiment of cable examination and repair system, based on above-described embodiment description
Cable examination and repair system, the embodiment of the present invention additionally provide a kind of method of cable maintenance corresponding with the cable examination and repair system.By
Embodiment in cable repair method part is corresponded with the embodiment of cable examination and repair system part, therefore cable repair method
Partial embodiment refer to the embodiment description of cable examination and repair system part, no longer be described in detail here.
The method flow diagram that a kind of cable that Fig. 2 is provided by the embodiment of the present invention overhauls, as shown in Fig. 2, based on above-mentioned
The cable examination and repair system that any one embodiment provides, the method for cable maintenance comprise the following steps：
S101：When cable powers off, in the first current value and cable of the first object cable for obtaining cable source respectively
Second current value of the second target cable of section.
S102：Judge the first current value and the second current value whether in given threshold.
If it is, enter step S103.
If it is not, then enter step S104.
S103：The second current target cable of characterization breaks down.
S104：The second current target cable of characterization does not break down.
When cable breaks down machine power-off, the first current value and electricity of the first object cable of cable source are obtained respectively
Second current value of second target cable in cable stage casing；After the first current value and the second current value is got, first is judged
Whether current value and the second current value are in predetermined threshold value, and service personnel sets after calculating during the threshold value, if the first electricity
Flow valuve and the second current value represent that the second current target cable breaks down all in predetermined threshold value, otherwise represent current
The second target cable be exactly the cable to break down.Threshold value be specifically set as it is how many suitable, can depending on actual situation,
Do not lay down hard and fast rule.
A kind of method of cable maintenance provided by the present invention, the cable inspection provided based on any one above-mentioned embodiment
System is repaiied, including when cable powers off, obtains the first current value and the cable stage casing of the first object cable of cable source respectively
The second target cable the second current value；Judge the first current value and the second current value whether in given threshold；If
It is then to characterize the second current target cable to break down；If it is not, then event does not occur for the second target cable of characterization currently
Barrier.This method, when cable break down power off when, first obtain cable source first object cable on the first current value and
The second current value in second target cable in cable stage casing, it is such as equal by the first current value and the second current value that judge to obtain
In setting range, just illustrate that first object cable and the second target cable are same root cable, this means that current second
Target cable is exactly the cable to break down, which root cable in cable stage casing can be fast and accurately determined by this method
For failure cable, and then overhaul efficiency when being overhauled to long range multi-cable and maintenance accuracy can be improved.
A kind of method and system of cable maintenance provided by the present invention are described in detail above.Use herein
Several examples are set forth the principle of the present invention and embodiment, and the explanation of above example, is only intended to help and understands
The method and its core concept of the present invention；Meanwhile for those of ordinary skill in the art, according to the thought of the present invention, having
There will be changes in body embodiment and application range, in conclusion this specification content should not be construed as to the present invention
Limitation, those skilled in the art, on the premise of no creative work, to the present invention made modification, equivalent substitution,
Improve etc., it should be included in the application.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One operation is distinguished with another operation, without necessarily requiring or implying there are any between these entities or operation
This actual relation or order.Moreover, the similar word such as term " comprising " so that unit, equipment including a series of elements
Or system not only includes those key elements, but also including other elements that are not explicitly listed, or further include as this list
Member, equipment or the intrinsic key element of system.
Claims (10)
- A kind of 1. cable examination and repair system, it is characterised in that including：Current feedback circuit, the first current collector, the first Current Display, the second current collector and the second Current Display；The first object cable connection of first current collector and the current feedback circuit with cable source, described first Current Display is connected with first current collector to obtain the first object of the first current collector collection The current value of cable；Second current collector is connected with second target cable in cable stage casing, second Current Display and described the Two current collectors are connected to obtain the current value for second target cable that second current collector gathers；The electricity Flow-generator is used to provide electric current for the first object cable and second target cable.
- 2. cable examination and repair system according to claim 1, it is characterised in that first current collector is specially first Current transformer.
- 3. cable examination and repair system according to claim 2, it is characterised in that first current transformer is specifically first Wafer type zero sequence current mutual inductor.
- 4. cable examination and repair system according to claim 1, it is characterised in that second current collector is specially second Current transformer.
- 5. cable examination and repair system according to claim 4, it is characterised in that second current transformer is specifically second Wafer type zero sequence current mutual inductor.
- 6. cable examination and repair system according to claim 1, it is characterised in that first Current Display and described second Current Display is ammeter.
- 7. cable examination and repair system according to claim 1, it is characterised in that further include：The alarm module being connected with the current feedback circuit, the alarm module are used for when the current feedback circuit breaks down Alarm.
- 8. cable examination and repair system according to claim 7, it is characterised in that further include：The range sensor being connected respectively with the current feedback circuit and the alarm module, the range sensor are used to gather The distance between user and the current feedback circuit, when the distance is prompted less than threshold value alarm.
- 9. cable examination and repair system according to claim 8, it is characterised in that the alarm module be specially buzzer and/ Or indicator light.
- A kind of 10. method of cable maintenance, based on cable examination and repair system described in claim 1-9 any one, it is characterised in that Including：When cable powers off, the first current value of first object cable and second mesh in cable stage casing of cable source are obtained respectively Mark the second current value of cable；Judge first current value and second current value whether in given threshold；If it is, second target cable of characterization currently breaks down；If it is not, then second target cable of characterization currently does not break down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711321580.4A CN107907795A (en) | 2017-12-12 | 2017-12-12 | A kind of method and system of cable maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711321580.4A CN107907795A (en) | 2017-12-12 | 2017-12-12 | A kind of method and system of cable maintenance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107907795A true CN107907795A (en) | 2018-04-13 |
Family
ID=61865409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711321580.4A Pending CN107907795A (en) | 2017-12-12 | 2017-12-12 | A kind of method and system of cable maintenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107907795A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1564006A (en) * | 2004-04-02 | 2005-01-12 | 江苏省电力公司常州供电公司 | Recognition method of power cable |
| JP2007040861A (en) * | 2005-08-04 | 2007-02-15 | Furukawa Electric Co Ltd:The | Residual charge measuring method for cv cable |
| EP1412767B1 (en) * | 2001-07-26 | 2008-08-13 | Seba-Dynatronic Mess- und Ortungstechnik GmbH | Method and error location in branched low voltage and medium voltage networks and evaluation circuit used thereof |
| CN201340438Y (en) * | 2009-01-06 | 2009-11-04 | 王继文 | Electric energy meter box for automatically detecting operation exception of electric energy meter |
| CN102735994A (en) * | 2012-07-10 | 2012-10-17 | 浙江图维电力科技有限公司 | Method and device for inputting or detecting non-contact signals based on capacitor sensing |
| CN103241226A (en) * | 2012-02-05 | 2013-08-14 | 尤文峰 | Ultrasonic automatic brake system |
| CN203732665U (en) * | 2014-02-18 | 2014-07-23 | 滦南林海科技发展有限责任公司 | Cable discrimination and determination device |
| CN104376672A (en) * | 2014-12-08 | 2015-02-25 | 成都国蓉科技有限公司 | Laptop remote burglar alarm |
| CN204287263U (en) * | 2014-10-09 | 2015-04-22 | 扬州国裕船舶制造有限公司 | A kind of current signal generator for the debugging of boats and ships electric switch |
| CN104599412A (en) * | 2013-11-04 | 2015-05-06 | 成都市未来合力科技有限责任公司 | Alarm for aviation precision instrument |
| CN104724003A (en) * | 2013-12-24 | 2015-06-24 | 朱春梅 | Vehicle approach alarm system |
| CN204613345U (en) * | 2014-12-16 | 2015-09-02 | 大唐太原第二热电厂 | A kind of recognition device of cable fault |
| CN107907780A (en) * | 2017-11-22 | 2018-04-13 | 安徽马钢设备检修有限公司 | A kind of cable seeking discrimination method |
-
2017
- 2017-12-12 CN CN201711321580.4A patent/CN107907795A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1412767B1 (en) * | 2001-07-26 | 2008-08-13 | Seba-Dynatronic Mess- und Ortungstechnik GmbH | Method and error location in branched low voltage and medium voltage networks and evaluation circuit used thereof |
| CN1564006A (en) * | 2004-04-02 | 2005-01-12 | 江苏省电力公司常州供电公司 | Recognition method of power cable |
| JP2007040861A (en) * | 2005-08-04 | 2007-02-15 | Furukawa Electric Co Ltd:The | Residual charge measuring method for cv cable |
| CN201340438Y (en) * | 2009-01-06 | 2009-11-04 | 王继文 | Electric energy meter box for automatically detecting operation exception of electric energy meter |
| CN103241226A (en) * | 2012-02-05 | 2013-08-14 | 尤文峰 | Ultrasonic automatic brake system |
| CN102735994A (en) * | 2012-07-10 | 2012-10-17 | 浙江图维电力科技有限公司 | Method and device for inputting or detecting non-contact signals based on capacitor sensing |
| CN104599412A (en) * | 2013-11-04 | 2015-05-06 | 成都市未来合力科技有限责任公司 | Alarm for aviation precision instrument |
| CN104724003A (en) * | 2013-12-24 | 2015-06-24 | 朱春梅 | Vehicle approach alarm system |
| CN203732665U (en) * | 2014-02-18 | 2014-07-23 | 滦南林海科技发展有限责任公司 | Cable discrimination and determination device |
| CN204287263U (en) * | 2014-10-09 | 2015-04-22 | 扬州国裕船舶制造有限公司 | A kind of current signal generator for the debugging of boats and ships electric switch |
| CN104376672A (en) * | 2014-12-08 | 2015-02-25 | 成都国蓉科技有限公司 | Laptop remote burglar alarm |
| CN204613345U (en) * | 2014-12-16 | 2015-09-02 | 大唐太原第二热电厂 | A kind of recognition device of cable fault |
| CN107907780A (en) * | 2017-11-22 | 2018-04-13 | 安徽马钢设备检修有限公司 | A kind of cable seeking discrimination method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103926510B (en) | A kind of cable sheath electric current and current-carrying capacity on-line monitoring and fault diagonosing localization method | |
| CN110389283A (en) | A kind of cable slack layer ablation condition detecting system and detection method | |
| CN109193632B (en) | A kind of intelligent low-voltage platform area power circuit automated topology system | |
| EP2680017A1 (en) | A method of early detection of feeder lines with a high-ohm ground fault in compensated power networks | |
| CN105759164A (en) | Neural line disconnection detection and positioning method | |
| CN108919002A (en) | A kind of test macro of direct-current charging post | |
| CN102621457A (en) | On-line detection method of metal oxide arrester insulating property influencing factor | |
| CN205263227U (en) | Leakage detection equipment | |
| CN107078690A (en) | The method and system of failure is detected and positioned in DC systems | |
| CN103543378B (en) | Platform sheet relation detection method | |
| CN104714128A (en) | Online arrester monitoring system | |
| CN202870234U (en) | Online fault monitoring system for 10KV circuit | |
| CN108445296A (en) | A kind of online insulation resistance detection device and its detection method | |
| CN110988600B (en) | Power distribution network line break fault section positioning method | |
| CN202141752U (en) | Online monitoring device for metal zinc oxide lightning arrester | |
| CN105388355A (en) | Ground screen shunting vector test system and method with GPS synchronization | |
| CN108318732B (en) | On-line monitoring device and method for grounding current of transformer core | |
| CN103050907A (en) | Security maintenance method for common grounding electrode of direct current power transmission systems | |
| CN104299172A (en) | Power grid weak link comprehensive recognition method | |
| CN105403808B (en) | A kind of localization method and device of DC line earth fault | |
| KR102206379B1 (en) | Photovoltaic ground resistance measuring system | |
| CN205157639U (en) | Synchronous earth mat reposition of redundant personnel vector test system of application GPS | |
| CN107907795A (en) | A kind of method and system of cable maintenance | |
| CN111638425A (en) | High-voltage cable fault positioning device | |
| CN111025096A (en) | XLPE cable aging state evaluation method based on leakage current characteristic factor |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180413 |