CN105954646A - Novel multifunctional DC trial transmission instrument - Google Patents
Novel multifunctional DC trial transmission instrument Download PDFInfo
- Publication number
- CN105954646A CN105954646A CN201610554180.7A CN201610554180A CN105954646A CN 105954646 A CN105954646 A CN 105954646A CN 201610554180 A CN201610554180 A CN 201610554180A CN 105954646 A CN105954646 A CN 105954646A
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- module
- instrument
- detected
- circuit
- telecommunication
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a novel multifunctional DC trial transmission instrument, and relates to the technical field of power cable detection. The novel multifunctional DC trial transmission instrument has a voice broadcast waning function so that work personnel are enabled timely and effectively acquire a detection result; the novel multifunctional DC trial transmission instrument is provided with a protection device so that accidental touching of a high voltage wiring device can be prevented and the safety coefficient can be enhanced; and power is automatically disconnected when a fault occurs, and automatic discharging is performed after detection so that the safety of the instrument and the line can be guaranteed, and the personal safety of the work personnel can be further guaranteed. The key points of the technical scheme are that a power supply module acquires a power supply electric signal and converts the power supply electric signal; a voltage boosting module boosts voltage and acquires a detection electric signal; the detection electric signal is outputted by an output module and applied to the line to be detected; a judgment module acquires real-time electric signal parameters and judges the fault of the line to be detected; a voice module performs fault voice broadcast warning; and the protection device is matched with a wiring clamp. The novel multifunctional DC trial transmission instrument is mainly applied to high voltage line detection.
Description
Technical field
The present invention relates to power cable detection technique field, particularly relate to a kind of Multifunction direct current examination and send instrument.
Background technology
After power cable is electrified pressure, insulation but be not the most non-conductive, have ion displacement, meeting inside it
Produce faint electric current, be leakage current.The size of Leakage Current is relevant, due to south China with the insulating properties power of cable
Air humidity is big so that the insulating properties of cable weakens, and leakage current increases；The size of leakage current also with apply voltage levels
Relevant, apply voltage the highest, leakage current is the biggest.Therefore, a instrument being capable of the examination censorship survey of south China high-tension line
Device is the important topic of technical staff's research and development instantly.
HVDC examination in the market is sent instrument mainly to realize high direct voltage by transformator and commutator etc. and is exported,
Usually, the examination of above-mentioned HVDC send the output voltage of instrument to be 7 kilovolts, electric current is about 100 milliamperes.In use, it is defeated
The high-voltage signal gone out is carried on circuit to be detected, it is judged that whether circuit to be detected exists fault.
Instrument is sent in the examination of above-mentioned HVDC, output and can only output voltage be 7 kilovolts, electric current be the detection of about 100 milliamperes
Voltage, can not meet the requirement to detection voltage of the more high-tension line, and the scope of application is little；High-pressure section is not provided with self-shield dress
Put, there is certain potential safety hazard.
Summary of the invention
A kind of Multifunction direct current examination that the present invention provides send instrument, the present invention to have voice broadcast alarm function, makes work
Make personnel and can obtain testing result timely and effectively；Protection device is set, prevents from surprisingly touching high-voltage connecting device, improve peace
Overall coefficient；Automatically cut off power supply during fault, automatic discharging after detection, it is ensured that instrument of the present invention and line security, protect further
Demonstrate,prove the personal safety of staff.
For reaching above-mentioned purpose, the present invention adopts the following technical scheme that
The present invention provides a kind of Multifunction direct current examination to send instrument, including: power module, boost module, output module, it is judged that mould
Block, voice module and protection device；
Described power module comprises connection unit and pressure regulation unit, and described connection unit obtains the power supply signal of telecommunication, described pressure regulation list
The described power supply signal of telecommunication is changed by unit；After described boost module will be changed, the described power supply signal of telecommunication boosts, and obtains detection electricity
Signal；Described boost module is connected with described output module, and the described detection signal of telecommunication exports via described output module, in order to execute
It is added on circuit to be detected；
Described judge module is connected with described output module, obtains current data and the voltage data of described circuit to be detected, and
Judge whether described circuit to be detected exists fault: if described current data and the proportional linear change of described voltage data, then
There is not fault in described circuit to be detected；If described current data and described voltage data are nonlinear change, and described electric current
Data tend to infinitely great, and the most described circuit to be detected exists fault；
Described voice module is connected with described judge module, when described judge module determines that described circuit to be detected exists fault
After, described voice module carries out corresponding voice broadcast warning.
Described protection device is mated with ramp, and described protection device is distributed in the outer surface of described ramp；Described
Ramp is connected with described output module.
In conjunction with above-mentioned, described protection device is isolation material.
In conjunction with above-mentioned, described detection electrical signal voltage output area is 0 kilovolt 10 kilovolts, and range of current output is 0 milli
Pacify 120 milliamperes.
In conjunction with above-mentioned, further, instrument is sent in described Multifunction direct current examination, also includes: protection module；
Described protection module is connected with described judge module, and when described circuit to be detected exists fault, described protection module is cut
Disconnected described detection signal of telecommunication output.
In conjunction with above-mentioned, instrument is sent in described Multifunction direct current examination, also includes: automatic discharging module；
Described automatic discharging module is connected with described judge module, when described judge module judges whether circuit to be detected exists event
After barrier, described automatic discharging module is discharged.
In conjunction with above-mentioned, instrument is sent in described Multifunction direct current examination, also includes: read module；
Described read module is connected with described output module, and described read module is divided into voltage to read unit and electric current reads single
Unit, correspondence reads described line voltage distribution data to be detected and current data respectively.
In conjunction with above-mentioned, it is voltmeter that described voltage reads unit；It is ammeter that described electric current reads unit.
In conjunction with above-mentioned, described automatic discharging module is realized by the electrical connection of discharge tube and capacitor, and is parallel to described
On circuit to be detected.
In conjunction with above-mentioned, the described power supply signal of telecommunication that described connection unit obtains is alternating current 220V；Described pressure regulation unit is by institute
State the power supply signal of telecommunication to be converted to exchange the 0 V 220V signal of telecommunication.
In conjunction with above-mentioned, described boost module is multistage Cascade rectification circuit.
Instrument is sent in a kind of Multifunction direct current examination that the present invention provides, including: power module, boost module, output module,
Judge module, voice module and protection device, power module obtains the power supply signal of telecommunication and changes；Boost module boosts
Obtain the detection signal of telecommunication；Export via output module, put on circuit to be detected；Judge module obtains real-time tele-communication parameter,
Judge whether circuit to be detected exists fault；Voice module carries out failure voice and reports warning, and protection device is mated with ramp,
Being distributed in ramp outer surface, compared to prior art, the present invention has voice broadcast alarm function, make staff can and
Time effectively obtain testing result；Protection device is set, prevents from surprisingly touching high-voltage connecting device, improve safety coefficient；Therefore
Automatically cut off power supply during barrier, automatic discharging after detection, it is ensured that instrument of the present invention and line security, further ensure work people
The personal safety of member.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, required use in below embodiment being described
Accompanying drawing be briefly described.
Fig. 1 is that in the embodiment of the present invention 1, a kind of Multifunction direct current examination send instrument structure to form schematic diagram；
Fig. 2 is that in the embodiment of the present invention 1, instrument boost module circuit connection diagram is sent in a kind of Multifunction direct current examination；
Fig. 3 is that in the embodiment of the present invention 2, a kind of Multifunction direct current examination send instrument structure to form schematic diagram；
Fig. 4 is that in the embodiment of the present invention 2, instrument automatic discharging modular circuit connection diagram is sent in a kind of Multifunction direct current examination.
In figure, 1. power module, 11. connect unit, 12. pressure regulation unit, 2. boost module, 3. output modules, 31. wiring
Folder, 4. judge module, 5. voice module, 6. protection device, 7. protection module, 8. automatic discharging module, 9. read module, 91.
Voltage reads unit, and 92. electric currents read unit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe wholely.Obviously, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Embodiment 1
The embodiment of the present invention provides a kind of Multifunction direct current examination to send instrument, as it is shown in figure 1, including: power module 1, rise pressing mold
Block 2, output module 3, it is judged that module 4, voice module 5 and protection device 6.
Described power module 1 comprises connection unit 11 and pressure regulation unit 12, and described connection unit 11 obtains the power supply signal of telecommunication,
The described power supply signal of telecommunication is changed by described pressure regulation unit 12；Described boost module 2 is by described power supply signal of telecommunication liter after conversion
Pressure, obtains the detection signal of telecommunication；Described boost module 2 is connected with described output module 3, and the described detection signal of telecommunication is via described output
Module 3 exports, in order to put on circuit to be detected.
Wherein, the present embodiment uses household AC 220V for the power supply signal of telecommunication, connects unit 11 by connecting alternating current 220V
Delivery outlet obtains alternating current 220V and powers the signal of telecommunication, and it is 0 ~ 220V variable AC that alternating current 220V is converted to scope by pressure regulation unit 12
The signal of telecommunication.As in figure 2 it is shown, boost module 2 is multistage Cascade rectification circuit, according to the difference of required voltage, different progression times
Volt circuit is connected in series composition tandem DC high-voltage circuit, Cascade Output Voltage in Rectified Circuits formula:,
Wherein: Ud is the voltage of the detection signal of telecommunication in output voltage, i.e. the present embodiment, and n is tandem multiple, and U2 is primary voltage, i.e.
0 ~ 220V variable AC signal of telecommunication in the present embodiment, K is the pressure regulation ratio of pressure regulation unit 12, be real-time pressure regulation output valve with
The ratio of 220, such as: pressure regulation unit 12 telecommunication signal of being powered by alternating current 220V is converted to the 110V variable AC signal of telecommunication, then K=
110/220=0.5.0 ~ 220V variable AC signal of telecommunication is boosted to detect telecommunications by boost module 2 by regulation tandem multiple accordingly
Number, the detection signal of telecommunication exports via output module 3, in order to put on circuit to be detected.
It should be understood that the present embodiment detection signal of telecommunication scope is: voltage output range is 0 kilovolt 10 kilovolts, electricity
Stream output area is 0 milliampere 120 milliamperes, when detecting, usually, makes detection electrical signal voltage value ascending gradually
Increasing, therefore boost module 2 is the detection electrical signal voltage numerical value boosting to 0 ~ 220V variable AC signal of telecommunication preset in real time.
Described judge module 4 is connected with described output module 3, obtains current data and the voltage number of described circuit to be detected
According to, and judge whether described circuit to be detected exists fault: if described current data and the proportional linear change of described voltage data
Changing, there is not fault in the most described circuit to be detected；If described current data and described voltage data are nonlinear change, and described
Current data tends to infinitely great, and the most described circuit to be detected exists fault.
Wherein, make when detecting that the voltage of the output detections signal of telecommunication is ascending to be gradually increased, because survey line to be checked
The resistance value on road is changeless, if circuit to be detected is normal, the electric current on circuit the most to be detected can be with the increase of voltage
And proportional linear change.Judge module 4 obtains real-time voltage data and real-time current data, judges to be checked according to principles above
Whether survey line road exists fault: if described current data and the proportional linear change of described voltage data, the most described survey line to be checked
There is not fault in road；If described current data and described voltage data are nonlinear change, and described current data tends to infinite
Greatly, there is fault in the most described circuit to be detected.
Described voice module 5 is connected with described judge module 4, when described judge module 4 determines that described circuit to be detected is deposited
After a failure, described voice module 5 carries out corresponding voice broadcast warning.
Wherein, voice module 5 realizes the conversion of information by speech chip, when judge module 4 determines to be checked through judgement
When survey line road exists fault, voice module 5 will carry out voice broadcast warning, such as: " this circuit is deposited in report in the form of speech
In fault " content.
Described protection device 6 is mated with ramp 31, and described protection device 6 is distributed in the outside table of described ramp 31
Face；Described ramp 31 is connected with described output module 3.
Wherein, ramp 31 is used for connecting output module 3 and circuit to be detected, and general, ramp 31 is metal material
Jaw-like, be directly connected to the output lead of output module 3, when detecting, the jaw portion of ramp 31 is clamped in be treated
On detection cable, it is achieved output module 3 and the electrical connection of circuit to be detected.The present embodiment protection device 6 selects isolation material, point
Cloth, at ramp 31 outer surface (except necessary electrical connections), prevents the unexpected ramp 31 touching load high pressure with this.
Instrument is sent in a kind of Multifunction direct current examination that the present invention provides, including: power module, boost module, output module,
Judge module, voice module and protection device, power module obtains the power supply signal of telecommunication and changes；Boost module boosts
Obtain the detection signal of telecommunication；Export via output module, put on circuit to be detected；Judge module obtains real-time tele-communication parameter,
Judge whether circuit to be detected exists fault；Voice module carries out failure voice and reports warning, and protection device is mated with ramp,
Being distributed in ramp outer surface, compared to prior art, the present invention has voice broadcast alarm function, make staff can and
Time effectively obtain testing result；Protection device is set, prevents from surprisingly touching high-voltage connecting device, improve safety coefficient；Therefore
Automatically cut off power supply during barrier, automatic discharging after detection, it is ensured that instrument of the present invention and line security, further ensure work people
The personal safety of member.
Embodiment 2
The embodiment of the present invention provides a kind of Multifunction direct current examination to send instrument, as it is shown on figure 3, include: power module 1, rises pressing mold
Block 2, output module 3, it is judged that module 4, voice module 5, protection device 6, protect module 7, automatic discharging module 8 and read module
9。
Described power module 1 comprises connection unit 11 and pressure regulation unit 12, and described connection unit 11 obtains the power supply signal of telecommunication,
The described power supply signal of telecommunication is changed by described pressure regulation unit 12；Described boost module 2 is by described power supply signal of telecommunication liter after conversion
Pressure, obtains the detection signal of telecommunication；Described boost module 2 is connected with described output module 3, and the described detection signal of telecommunication is via described output
Module 3 exports, in order to put on circuit to be detected.
Described judge module 4 is connected with described output module 3, obtains current data and the voltage number of described circuit to be detected
According to, and judge whether described circuit to be detected exists fault: if described current data and the proportional linear change of described voltage data
Changing, there is not fault in the most described circuit to be detected；If described current data and described voltage data are nonlinear change, and described
Current data tends to infinitely great, and the most described circuit to be detected exists fault；
Described voice module 5 is connected with described judge module 4, when described judge module 4 determines that described circuit to be detected exists event
After barrier, described voice module 5 carries out corresponding voice broadcast warning.
Described protection device 6 is mated with ramp 31, and described protection device 6 is distributed in the outside table of described ramp 31
Face；Described ramp 31 is connected with described output module 3.
Herein need explanation: power module 1, boost module 2, output module 3, it is judged that module 4 and voice module 5 and protect
Here is omitted for protection unit 6 related content, refers to embodiment 1 corresponding content.
Described protection module 7 is connected with described judge module 4, when there is fault in described circuit to be detected, and described protection
Module 7 cuts off the output of the described detection signal of telecommunication.
Described automatic discharging module 8 is connected with described judge module 4, when described judge module 4 judges that circuit to be detected is
No depositing after a failure, described automatic discharging module 8 is discharged.
Wherein, as shown in Figure 4, instrument of the present invention and circuit to be detected are discharged by automatic discharging module 8, in order to eliminate
Keep Clear-High Voltage.Automatic discharging module 8 uses discharge tube F and capacitor C, is parallel on circuit to be detected.It is parallel to ammeter two
The switch K of end is used for short circuit microampere meter, only opens when starting instrument and testing；Capacitor C and discharge tube F is used for shunting treating
The short circuit current of detection circuit；The resistance R connected with ammeter is used for producing voltage, makes the electric current flowing through ammeter reach certain
During value, discharge tube punctures, and when the resistance of R is typically chosen as the ull-scale value that electric current is ammeter flowing through it, voltage thereon is equal to
The breakdown voltage of discharge tube F.
Described read module 9 is connected with described output module 3, and described read module 9 is divided into voltage to read unit 91 and electricity
Stream reads unit 92, and correspondence reads described circuit real-time voltage data to be detected and current data respectively.
Wherein, described voltage reads unit 91 is voltmeter；It is ammeter that described electric current reads unit 92.
Instrument is sent in a kind of Multifunction direct current examination that the present invention provides, including: power module, boost module, output module,
Judge module, voice module, protection device, protect module, automatic discharging module and read module, power module obtains power supply electricity
Signal is also changed；Boost module carries out boosting and obtains the detection signal of telecommunication；Export via output module, put on survey line to be checked
Road；Judge module obtains real-time tele-communication parameter, it is judged that whether circuit to be detected exists fault；Voice module carries out failure voice
Reporting warning, protection device is mated with ramp, is distributed in ramp outer surface, and compared to prior art, the present invention has
Voice broadcast alarm function, makes staff can obtain testing result timely and effectively；Protection device is set, prevents unexpected touching
High-voltage connecting device, improves safety coefficient；Power supply is automatically cut off, automatic discharging after detection, it is ensured that instrument of the present invention during fault
Device and line security, further ensure the personal safety of staff.
Further, the embodiment of the present invention adds protection module and automatic discharging module, when determining that circuit exists fault
Time, protection module automatically cuts off High voltage output；After detection terminates, automatic discharging module is discharged, and Keep Clear-High Voltage in elimination, it is ensured that
Instrument safety and personal safety, improve the safety coefficient of the present invention.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement, all answer
Contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with described scope of the claims
Accurate.
Claims (10)
1. instrument is sent in a Multifunction direct current examination, it is characterised in that including: power module (1), boost module (2), exports mould
Block (3), it is judged that module (4), voice module (5) and protection device (6)；
Described power module (1) comprises connection unit (11) and pressure regulation unit (12), and described connection unit (11) obtains power supply electricity
Signal, the described power supply signal of telecommunication is changed by described pressure regulation unit (12)；Described boost module (2) is by described power supply after conversion
The signal of telecommunication boosts, and obtains the detection signal of telecommunication；Described boost module (2) is connected with described output module (3), the described detection signal of telecommunication
Export via described output module (3), in order to put on circuit to be detected；
Described judge module (4) is connected with described output module (3), obtains current data and the voltage number of described circuit to be detected
According to, and judge whether described circuit to be detected exists fault: if described current data and the proportional linear change of described voltage data
Changing, there is not fault in the most described circuit to be detected；If described current data and described voltage data are nonlinear change, and described
Current data tends to infinitely great, and the most described circuit to be detected exists fault；
Described voice module (5) is connected with described judge module (4), when described judge module (4) determines described circuit to be detected
Depositing after a failure, described voice module (5) carries out corresponding voice broadcast warning；
Described protection device (6) is mated with ramp (31), and described protection device (6) is distributed in the outside of described ramp (31)
Surface；Described ramp (31) is connected with described output module (3).
Instrument is sent in Multifunction direct current the most according to claim 1 examination, it is characterised in that:
Described protection device (6) is isolation material.
Instrument is sent in Multifunction direct current the most according to claim 1 examination, it is characterised in that:
Described detection electrical signal voltage output area is 0 kilovolt 10 kilovolts, and range of current output is 0 milliampere 120 milliamperes.
Instrument is sent in Multifunction direct current the most according to claim 1 examination, it is characterised in that also include: protection module (7)；
Described protection module (7) is connected with described judge module (4), when there is fault in described circuit to be detected, and described protection
Module (7) cuts off the output of the described detection signal of telecommunication.
Instrument is sent in Multifunction direct current the most according to claim 1 examination, it is characterised in that also include: automatic discharging module
(8)；
Described automatic discharging module (8) is connected with described judge module (4), when described judge module (4) judges circuit to be detected
Whether deposit after a failure, described automatic discharging module (8) is discharged.
Instrument is sent in Multifunction direct current the most according to claim 1 examination, it is characterised in that also include: read module (9)；
Described read module (9) is connected with described output module (3), and described read module (9) is divided into voltage to read unit (91)
Reading unit (92) with electric current, correspondence reads described line voltage distribution data to be detected and current data respectively.
Instrument is sent in Multifunction direct current the most according to claim 6 examination, it is characterised in that:
It is voltmeter that described voltage reads unit (91)；It is ammeter that described electric current reads unit (92).
Instrument is sent in Multifunction direct current the most according to claim 5 examination, it is characterised in that:
Described automatic discharging module (8) is realized by the electrical connection of discharge tube and capacitor, and is parallel to described circuit to be detected
On.
Instrument is sent in Multifunction direct current the most according to claim 1 examination, it is characterised in that:
The described power supply signal of telecommunication that described connection unit (11) obtains is alternating current 220V；Described pressure regulation unit (12) is by described power supply
The signal of telecommunication is converted to exchange the 0 V 220V signal of telecommunication.
Instrument is sent in Multifunction direct current the most according to claim 1 examination, it is characterised in that:
Described boost module (2) is multistage Cascade rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610554180.7A CN105954646A (en) | 2016-07-14 | 2016-07-14 | Novel multifunctional DC trial transmission instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610554180.7A CN105954646A (en) | 2016-07-14 | 2016-07-14 | Novel multifunctional DC trial transmission instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105954646A true CN105954646A (en) | 2016-09-21 |
Family
ID=56900827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201610554180.7A Pending CN105954646A (en) | 2016-07-14 | 2016-07-14 | Novel multifunctional DC trial transmission instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579920A (en) * | 2020-04-17 | 2020-08-25 | 深圳供电局有限公司 | Fault detection device and method |
| CN113219299A (en) * | 2021-04-19 | 2021-08-06 | 深圳供电局有限公司 | Portable comprehensive diagnosis device for distribution line |
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| CN102981092A (en) * | 2012-11-15 | 2013-03-20 | 广东电网公司肇庆供电局 | Detecting device of electric transmission circuit ground connection state |
| CN203249975U (en) * | 2013-04-26 | 2013-10-23 | 广西电网公司柳州供电局 | DC transmission instrument |
| JP2013257150A (en) * | 2012-06-11 | 2013-12-26 | Mitsubishi Electric Corp | Insulation defect position locating device and insulation defect position locating method for power cable |
| CN205139284U (en) * | 2015-10-10 | 2016-04-06 | 珠海润科电力设备有限公司 | Instrument is sent in direct current examination |
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- 2016-07-14 CN CN201610554180.7A patent/CN105954646A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2013257150A (en) * | 2012-06-11 | 2013-12-26 | Mitsubishi Electric Corp | Insulation defect position locating device and insulation defect position locating method for power cable |
| CN102981092A (en) * | 2012-11-15 | 2013-03-20 | 广东电网公司肇庆供电局 | Detecting device of electric transmission circuit ground connection state |
| CN203249975U (en) * | 2013-04-26 | 2013-10-23 | 广西电网公司柳州供电局 | DC transmission instrument |
| CN205139284U (en) * | 2015-10-10 | 2016-04-06 | 珠海润科电力设备有限公司 | Instrument is sent in direct current examination |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111579920A (en) * | 2020-04-17 | 2020-08-25 | 深圳供电局有限公司 | Fault detection device and method |
| CN113219299A (en) * | 2021-04-19 | 2021-08-06 | 深圳供电局有限公司 | Portable comprehensive diagnosis device for distribution line |
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Application publication date: 20160921 |
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| RJ01 | Rejection of invention patent application after publication |