CN106443367A - Signal transmitter for finding power distribution line grounding fault points - Google Patents
Signal transmitter for finding power distribution line grounding fault points Download PDFInfo
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- CN106443367A CN106443367A CN201610915567.0A CN201610915567A CN106443367A CN 106443367 A CN106443367 A CN 106443367A CN 201610915567 A CN201610915567 A CN 201610915567A CN 106443367 A CN106443367 A CN 106443367A
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- 238000012360 testing method Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 230000032683 aging Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 238000013399 early diagnosis Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
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- 238000011084 recovery Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
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- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention belongs to the technical field of finding of power distribution line grounding fault points and particularly relates to a signal transmitter for finding power distribution line grounding fault points. The signal transmitter for finding power distribution line grounding fault points comprises a signal transmitter body, wherein the signal transmitter body comprises a shell; a high-voltage output terminal, a main grounding terminal and a power input port are arranged on the shell; a high voltage generation circuit is arranged inside the shell and comprises a transformer T1, a high-voltage rectifying circuit ZL, a capacitor C1, a resistor R1 and a signal transmitting switch SW1; the input end of the transformer T1 is electrically connected with the power input port; the output end of the transformer T1 is electrically connected with the input end of the high-voltage rectifying circuit ZL; the capacitor C1 is in parallel connection with the output end of the high-voltage rectifying circuit ZL; a positive output end of the high-voltage rectifying circuit ZL is successively connected in series with the resistor R1 and the signal transmitting switch SW1 and is subsequently electrically connected with the high-voltage output terminal; a negative output end of the high-voltage rectifying circuit ZL and a grounding end of the signal transmitting switch SW1 are both electrically connected with the main grounding terminal.
Description
Technical field
The invention belongs to the technical field that distribution line earth fault is searched, and in particular to one kind is connect for distribution line
The sender that earth fault point is searched.
Background technology
With the expanding day of distribution network systems scale, distribution line is increasing.Once break down on distribution line, palpus
Find trouble point as early as possible, fix a breakdown, restore electricity.But, trouble point is often difficult to quickly locate as lookup means fall behind.
Trouble point is accurately found rapidly after line fault, not only to repairing circuit and fast recovery of power supply in time, and to entirely joining
The safety and stability of net system and economical operation have highly important effect.
Singlephase earth fault is very common a kind of fault in distribution line fault, almost accounts for the 80% of whole fault types
On.Singlephase earth fault has following harm：1st, the impact to line loss：The generation of singlephase earth fault can cause larger electricity
Can be lost, because distribution line Earth Phase is indirectly or directly to ground discharge, if reaching certain run time according to the rules (no
More than two hours), will so increase electric energy loss；2nd, the harm to life entity：One kind of singlephase earth fault shows and is exactly
Wire lands, if there is wire landing, passer-by and circuit patrolman when ground connection distribution line is out of service
(especially at night) is likely to result in person electric shock even generation of the accident such as injures and deaths, other biological is likely to cause to get an electric shock
Casualty accident；3rd, the harm to controller switching equipment：Singlephase earth fault occurs it may happen that intermittent orphan's light ground connection, so as to cause
Resonance overvoltage, overvoltage can make the insulator on circuit that insulation breakdown occurs, and cause serious short circuit accident, can also make part
Distribution transformer is burned out, it is also possible to burn spark gap and fuse so as to there is electrical fire；4th, the harm to converting equipment：
In 10kV distribution line, after there is singlephase earth fault, can detect on the voltage transformer of transformer station's 10kV bus
Zero-sequence current, while in open-delta, produce residual voltage；Due to the core sataration of voltage transformer, excitation can be increased
Electric current, if run time is longer be possible to be burned out voltage transformer；After generation singlephase earth fault, several times can be also produced
In the resonance overvoltage of normal voltage, the insulating properties of converting equipment is endangered, when more serious, can make converting equipment that insulation breakdown occurs,
Cause more major break down.And, distribution network system mainly adopt the mode such as isolated neutral system and grounding through arc, in
Property point isolated neutral system in there is singlephase earth fault after, fault current is smaller, when system can continue one section of normal operation
Between, do not affect to customer power supply, but, prolonged operation can cause other more serious faults, destroy the peace of system equipment
Row for the national games.Therefore trouble shoot positioning is quickly and accurately carried out, can technically ensures the safe operation of electrical network.
Both at home and abroad following several method is mainly adopted to overhead transmission line trouble shoot at present：First, impedance mode：By measurement
With calculating line impedance, determine that fault whether there is and position, impedance method principle is fairly simple, and small investment can area coverage area
Domain is larger, adapts to simple long transmission line, but is affected larger, measurement error larger (more than 1km) by line characteristic, therefore multiple for structure
Miscellaneous, the larger distribution of the more load variations of branched line joint line simply directly can not carry out trouble point survey by adopting said method
Fixed；2nd, pulse-echo mode：After injected pulse signal, pulse produces reflection in trouble point, by the time of detected reflectance signal
Difference and wave characteristics localization of faults position and property, pulse-echo mode and pulse radar mode.The method does not receive failure classes
The impact of type, system impedance and transition resistance, it is not necessary to complicated process of calculation analysis, with higher positioning precision.But receive
The impact of lines branch structure and end reflection is larger, and for complicated distribution line and ad-hoc location, which can be limited
System, effect on driving birds is not good；3rd, impulses injection mode：To injected pulse signal between overhead transmission line and ground, along the line by pulse detector
Road detection pulse signal flow direction, has or not final localization of faults position in determination signal, and the method is not affected by system performance,
The line construction that can be applicable to complexity is determined, and be can determine fault particular location by the presence or absence of signal, is especially suitable for distribution line
The fault on road is searched.For impulses injection mode, the most of impulses injection apparatus structures that presently, there are are more complicated, and volume is relatively
Greatly, costly high, it is difficult to be widely used, further limit generally using for impulses injection mode.
Content of the invention
The present invention overcomes the shortcomings of that prior art is present, and technical problem to be solved is：A kind of simple structure, body are provided
Long-pending less, the cheap sender that searches for distribution line earth fault.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：One kind is used for distribution line earth fault
The sender that point is searched, including sender body, the sender body includes housing, and the housing is provided with high-voltage output end
Sub, main ground terminal and power input port, are provided with high-pressure generating circuit in the housing, and the high-pressure generating circuit includes to become
Depressor T1, high-voltage rectifying loop ZL, electric capacity C1, resistance R1 and transmit switch SW1, the input of the transformator T1 and the electricity
Source input port electrical connection, the outfan of the transformator T1 is electrically connected with the input of the high-voltage rectifying loop ZL,
The electric capacity C1 is attempted by the outfan of the high-voltage rectifying loop ZL, and the positive output end of the high-voltage rectifying loop ZL is gone here and there successively
Connect the resistance R1, described transmit switch SW1 after with the high voltage output terminal be electrically connected, the high-voltage rectifying loop ZL's
Negative output terminal, the earth terminal for transmitting switch SW1 are all electrically connected with the main ground terminal.
Preferably, outer container grounding ports being additionally provided with the housing, is additionally provided with control circuit, ground connection continuously in the housing
Detection circuit, cable burn-in test circuit and driving circuit, the negative terminal of the outer container grounding ports and the power input port
Electrical connection, between the outer container grounding ports and the main ground terminal and is connected to the first bleeder circuit, first partial pressure
Input of the outfan of circuit by the ground connection continuous detecting circuit with the control circuit is electrically connected, the control electricity
The input on road is also electrically connected with the outfan of the cable burn-in test circuit, the input of the cable burn-in test circuit
End is arranged at the high voltage output terminal with the shell with CT harvester CT1 electrical connection, the CT harvester CT1
On cable run between body, the outfan of the control circuit is electrically connected with the input of the driving circuit, the drive
The input of the outfan in dynamic loop and the transformator T1 is electrically connected, the outfan of the control circuit also with start stop switch
A1 is electrically connected, and the start stop switch A1 is serially connected on the positive input circuit of the transformator T1.
Preferably, voltage display screen being additionally provided with the housing, is additionally provided with the second bleeder circuit and voltage in the housing
Display control circuit, the input of second bleeder circuit and the resistance R1 and the line for transmitting between switch SW1
Electrical connection, the outfan of second bleeder circuit is electrically connected with the input of the voltage display control circuit, described
The outfan of voltage display control circuit is electrically connected with the input of the voltage display screen, the voltage display control circuit
Earth terminal and second bleeder circuit earth terminal all with the outer container grounding ports be electrically connected.
Preferably, ground connection display screen being additionally provided with the housing, is additionally provided with the 2nd CT harvester CT2 and connects in the housing
Ground display control circuit, the 2nd CT harvester CT2 is arranged on described transmitting between switch SW1 and the main ground terminal
On circuit, the 2nd CT harvester CT2 is electrically connected with the input of the ground connection display control circuit, and the ground connection shows
The outfan of control circuit is electrically connected with the input of the ground connection display screen.
Preferably, the power input port is electrically connected with outside 12V DC source.
Preferably, the 12V DC source of the outside is vehicle power, or is accumulator.
Preferably, the resistance of the resistance R1 is 2.5K Ω.
Preferably, the capacitance of the electric capacity C1 is 2 μ F.
The present invention is had the advantages that compared with prior art：
1st, the sender in the present invention includes housing, and housing is provided with power input port, high voltage output terminal etc., housing
High-pressure generating circuit is inside provided with, during work, first the carrying out being input into from power input port is boosted, then filled to electric capacity C1
Electricity, finally from transmit switch SW1 periodically direct current high voltage pulses are delivered letters to distribution line；Sender structure in the present invention connects
Single, cheap, all functional circuits are integrated in a housing so that the small volume of whole sender, are convenient for carrying,
There is very strong practicality.
2nd, the control circuit in the present invention can be by receiving the ground connection continuous detecting circuit and cable burn-in test circuit
The two signal for sending, the intensity for being transmitted come dynamic adjustment by the driving circuit and various parameters, so as to effectively shield
Various interference signals, greatly improve the identification accuracy rate of the CT detector for using cooperatively with sender.
Description of the drawings
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Fig. 1 is a kind of structure of sender that searches for distribution line earth fault of the offer of the embodiment of the present invention one
Schematic diagram；
Fig. 2 is the structural representation that a kind of distribution line earth fault of the offer of the embodiment of the present invention one searches device；
In figure：1 is sender body, and 2 is energising cable, and 3 is impulser, and 31 is hook portion, and 32 is fixed part, 4
For alarm, 5 is insulating bar, and 6 is power supply, and 7 is hook, and 8 is energising terminal, and 11 is housing, and 12 is high voltage output terminal, and 13 are
Main ground terminal, 14 is power input port, and 15 is outer container grounding ports, and 16 is control circuit, and 17 is electric for ground connection continuous detecting
Road, 18 is cable burn-in test circuit, and 19 is driving circuit, and 110 is the first bleeder circuit, and 111 is that voltage display screen, 112 are
Second bleeder circuit, 113 is voltage display control circuit, and 114 is ground connection display screen, and 115 is ground connection display control circuit.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention is clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments；Based on the embodiment in the present invention, ordinary skill people
The every other embodiment obtained under the premise of creative work is not made by member, belongs to the scope of protection of the invention.
Fig. 1 is a kind of structure of sender that searches for distribution line earth fault of the offer of the embodiment of the present invention one
Schematic diagram, Fig. 2 is the structural representation that a kind of distribution line earth fault of the offer of the embodiment of the present invention one searches device, such as
Shown in Fig. 1, Fig. 2, a kind of sender that searches for distribution line earth fault, including sender body 1, the sender
Body 1 includes housing 11, and the housing 11 is provided with high voltage output terminal 12, main ground terminal 13 and power input port 14,
High-pressure generating circuit is provided with the housing 11, the high-pressure generating circuit includes transformator T1, high-voltage rectifying loop ZL, electric capacity
C1, resistance R1 and transmit switch SW1, the input of the transformator T1 is electrically connected with the power input port 14, described
The input electrical connection with the high-voltage rectifying loop ZL of the output of transformator T1, the electric capacity C1 is attempted by the high pressure
The outfan of commutating circuit ZL, the positive output end of the high-voltage rectifying loop ZL is sequentially connected in series the resistance R1, described transmits out
It is electrically connected with the high voltage output terminal 12 after closing SW1, the negative output terminal of the high-voltage rectifying loop ZL, described transmits switch
The earth terminal of SW1 is all electrically connected with the main ground terminal 13.
In the present embodiment, sender body 1 includes housing 11, and housing 11 is provided with power input port 14, High voltage output
Terminal 12 etc., is provided with high-pressure generating circuit in housing 11, during work, first the carrying out being input into from power input port 14 is boosted,
Then be charged to electric capacity C1, finally from transmit switch SW1 periodically direct current high voltage pulses are delivered letters to distribution line.
This enforcement is with direct current 12V as power supply, and the interval of delivering letters for transmitting switch SW1 can be 2S or 6S, and the voltage of generation is
5KV, 10KV, 15KV, can be according to free switching in three electric pressures of circuit practical situation here.
Specifically, outer container grounding ports 15 can be also provided with the housing 11, be additionally provided with control circuit in the housing 11
16th, ground connection continuous detecting circuit 17, cable burn-in test circuit 18 and driving circuit 19, the outer container grounding ports 15 with described
The negative terminal electrical connection of power input port 14, between the outer container grounding ports 15 and the main ground terminal 13 and is connected to the
One bleeder circuit 110, the outfan of first bleeder circuit 110 is by the ground connection continuous detecting circuit 17 and the control
The input electrical connection of circuit 16, the output of the input of the control circuit 16 also with the cable burn-in test circuit 18
End electrical connection, the input of the cable burn-in test circuit 18 and CT harvester CT1 electrical connection, a CT
Harvester CT1 is arranged on the cable run between the high voltage output terminal 12 and the housing 11, the control circuit 16
The input of outfan and the driving circuit 19 be electrically connected, the outfan of the driving circuit 19 and the transformator T1
Input electrical connection, the outfan of the control circuit 16 is also electrically connected with start stop switch A1, the start stop switch A1
It is serially connected on the positive input circuit of the transformator T1.
Control circuit 16 in the present embodiment can be by receiving the ground connection continuous detecting circuit 17 and cable ageing management
The signal that both circuits 18 send, the intensity for being transmitted come dynamic adjustment by the driving circuit 19 and various parameters, so as to
Various interference signals are effectively shielded, greatly improves the identification accuracy rate of the CT detector for using cooperatively with sender.
Specifically, voltage display screen 111 can be also provided with the housing 11, be additionally provided with the second partial pressure electricity in the housing 11
Road 112 and voltage display control circuit 113, the input of second bleeder circuit 112 and the resistance R1 and described transmit
Line electrical connection between switch SW1, the outfan of second bleeder circuit 112 and the voltage display control circuit
113 input electrical connection, the input of the outfan of the voltage display control circuit 113 and the voltage display screen 111
End electrical connection, the earth terminal of the earth terminal of the voltage display control circuit 113 and second bleeder circuit 112 is all and institute
State outer container grounding ports 15 to be electrically connected.
Specifically, ground connection display screen 114 can be also provided with the housing 11, be additionally provided with the 2nd CT collection in the housing 11
Device CT2 and ground connection display control circuit 115, the 2nd CT harvester CT2 is arranged on and described transmits switch SW1 and the master connects
On circuit between ground terminal 1, the 2nd CT harvester CT2 is electric with the input of the ground connection display control circuit 115
Connection, the outfan of the ground connection display control circuit 115 is electrically connected with the input of the ground connection display screen 114.
Specifically, the power input port 14 can be electrically connected with outside 12V DC source.
Specifically, the 12V DC source of the outside can be vehicle power, or can be accumulator.
Specifically, the resistance of the resistance R1 can be 2.5K Ω.
Specifically, the capacitance of the electric capacity C1 can be 2 μ F.
Correspondingly, a kind of distribution line earth fault searches device, including sender and pulse detecting equipment, described
Letter machine includes：Sender body 1 and the energising cable 2 for connecting the sender body 1 and distribution line, the pulse inspection
Surveying device includes：For detecting the impulser 3 of pulse signal on distribution line, and input and the impulser
The alarm 4 of 3 outfan electrical connection, the sender on the moving automobile, the impulser 3 and the report
Alert device 4 is installed on insulating bar 5.
Specifically, the impulser 3 may include：For whole impulser 3 is suspended on distribution line
Hook portion 31, and the fixed part 32 for being fixedly mounted on whole impulser 3 on the insulating bar 5.
Specifically, the impulser 3 is located at the top of the insulating bar 5, and the alarm 4 can be located at the insulation
The bottom of rod 5.
More specifically, the length of the insulating bar 5 can reach 6～7 meters, or even longer.
Distribution line earth fault in the present embodiment is searched device and is mainly made up of sender and pulse detecting equipment,
When searching trouble point, sender body 1 injects high-voltage dc pulse, in circuit by the cable 2 that is energized in dead line
A little phenomena of the failure reproduce, and constitute fault current loop by being grounded, then using pulse detecting equipment along circuit query, by report
The induced signal of alert device 4 has or not the position that can just accurately determine fault generation, and the sender in the present embodiment is installed in shifting
On electrical automobile, pulse detecting equipment arbitrarily can be moved by moving automobile during work on insulating bar 5 according to actual needs
Dynamic sender, move pulse detecting equipment by hand-held insulating bar 5, easy to use, be easy to field engineering application.
During trouble point lookup is carried out, principle of the present embodiment mainly using gold cut point is being accurately positioned
The position of trouble point, after sender body 1 injects high-voltage pulse signal in circuit, impulser 3 is leaned on by hand-held insulating bar 5
Near line road carries out pulse detection, and such as alarm 4 sends alarm signal, then the measurement point is described in fault zone, such as alarm 4
Alarm signal is not sent, then the measurement point is described in normal region, by ambulatory handheld insulating bar 5 come traverse measurement point, directly
To accurately navigating to trouble point.
Specifically, the power supply 6 of the sender body 1 can be the vehicle power of 12V, or can be the accumulator of 12V so that
The continuous electric energy power of whole device is stronger, for the workplace of bad environments, with very big practicality.
Specifically, the hook 7 that can be provided with the energising cable 2 for fixing the energising cable 2, it is to avoid cable
Disorderly and unsystematic, so that the efficiency of impact trouble shoot work.
Specifically, the energising terminal 8 that can be provided with the energising cable 2 for connecting distribution line.
Specifically, the alarm 4 may include buzzer and display lamp.
Specifically, the impulser 3 can be CT detector.
Sender structure order in the present invention, cheap, all functional circuits are integrated in a housing so that
The small volume of whole sender, is convenient for carrying, with very strong practicality.
The present invention has measurement signal voltages grade height, and security reliability is high, it is little that line facility is affected, use simple side
Just, it is easy to the advantage of field engineering application, it is adaptable to which 10KV distribution line earth fault is investigated, and especially can investigate earth resistance not
More than the difficult high resistance earthing fault of 20K Ω, in power distribution network field failure investigation, there is very high practicability.This device is to distribution
On the basis of line-to-ground fault reason is analyzed, by very intuitively method judge abort situation, for general line
Road hunting attendant does not have very high technical requirements, can quickly and easily find out abort situation.Filled by using this detection
Put, can make to investigate distribution line fault and early diagnosiss in time, effectively the operation of protection power system safety and stability.
Finally it should be noted that：Various embodiments above only in order to technical scheme to be described, rather than a limitation；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of for distribution line earth fault search sender, including sender body (1), it is characterised in that：Institute
Stating sender body (1) includes housing (11), and housing (11) are provided with high voltage output terminal (12), main ground terminal (13)
High-pressure generating circuit is provided with power input port (14), housing (11), the high-pressure generating circuit includes transformator
T1, high-voltage rectifying loop ZL, electric capacity C1, resistance R1 and switch SW1 is transmitted, the input of the transformator T1 is defeated with the power supply
Inbound port (14) is electrically connected, and the outfan of the transformator T1 is electrically connected with the input of the high-voltage rectifying loop ZL,
The electric capacity C1 is attempted by the outfan of the high-voltage rectifying loop ZL, and the positive output end of the high-voltage rectifying loop ZL is gone here and there successively
Connect the resistance R1, described transmit switch SW1 after with the high voltage output terminal (12) be electrically connected, the high-voltage rectifying loop
The negative output terminal of ZL, the earth terminal for transmitting switch SW1 are all electrically connected with described main ground terminal (13).
2. according to claim 1 a kind of for distribution line earth fault search sender, it is characterised in that：Institute
State and outer container grounding ports (15) on housing (11), are additionally provided with, be additionally provided with control circuit (16), continue in housing (11)
Detection circuit (17), cable burn-in test circuit (18) and driving circuit (19), outer container grounding ports (15) and the electricity
The negative terminal electrical connection of source input port (14), between outer container grounding ports (15) and main ground terminal (13) and connects
There is the first bleeder circuit (110), the outfan of the first bleeder circuit (110) is by detection circuit (17) that continues
Be electrically connected with the input of the control circuit (16), the input of control circuit (16) also with the aging inspection of the cable
The outfan electrical connection of slowdown monitoring circuit (18), the input of cable burn-in test circuit (18) and a CT harvester CT1
Electrical connection, the CT harvester CT1 is arranged at the electricity between the high voltage output terminal (12) and the housing (11)
On cable road, the outfan of control circuit (16) is electrically connected with the input of the driving circuit (19), the driving
The input of the outfan in loop (19) and the transformator T1 is electrically connected, the outfan of control circuit (16) also with open
Guard's valve A1 is electrically connected, and the start stop switch A1 is serially connected on the positive input circuit of the transformator T1.
3. according to claim 2 a kind of for distribution line earth fault search sender, it is characterised in that：Institute
State and voltage display screen (111) on housing (11), is additionally provided with, in housing (11), be additionally provided with the second bleeder circuit (112) and voltage
Display control circuit (113), the input of the second bleeder circuit (112) switchs SW1 with the resistance R1 and described transmitting
Between line electrical connection, the outfan of the second bleeder circuit (112) and voltage display control circuit (113)
Input is electrically connected, the input of the outfan of voltage display control circuit (113) and voltage display screen (111)
Electrical connection, the earth terminal of the earth terminal of voltage display control circuit (113) and second bleeder circuit (112) all with
Described outer container grounding ports (15) are electrically connected.
4. according to claim 2 a kind of for distribution line earth fault search sender, it is characterised in that：Institute
State to be additionally provided with housing (11) in ground connection display screen (114), housing (11) and be additionally provided with the 2nd CT harvester CT2 and be grounded aobvious
Show control circuit (115), the 2nd CT harvester CT2 be arranged on described transmit switch SW1 and the main ground terminal (1) it
Between circuit on, the 2nd CT harvester CT2 and described ground connection display control circuit (115) input electrical connection, institute
State the outfan of ground connection display control circuit (115) and the input electrical connection of ground connection display screen (114).
5. according to claim 1 a kind of for distribution line earth fault search sender, it is characterised in that：Institute
Power input port (14) is stated with outside 12V DC source electrical connection.
6. according to claim 5 a kind of for distribution line earth fault search sender, it is characterised in that：Institute
The 12V DC source for stating outside is vehicle power, or is accumulator.
7. according to claim 1 a kind of for distribution line earth fault search sender, it is characterised in that：Institute
The resistance for stating resistance R1 is 2.5K Ω.
8. according to claim 1 a kind of for distribution line earth fault search sender, it is characterised in that：Institute
The capacitance for stating electric capacity C1 is 2 μ F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915567.0A CN106443367A (en) | 2016-10-20 | 2016-10-20 | Signal transmitter for finding power distribution line grounding fault points |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915567.0A CN106443367A (en) | 2016-10-20 | 2016-10-20 | Signal transmitter for finding power distribution line grounding fault points |
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| CN106443367A true CN106443367A (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610915567.0A Pending CN106443367A (en) | 2016-10-20 | 2016-10-20 | Signal transmitter for finding power distribution line grounding fault points |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110635384A (en) * | 2019-07-26 | 2019-12-31 | 国网浙江省电力有限公司丽水供电公司 | Portable central signal screen |
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| JP2004317349A (en) * | 2003-04-17 | 2004-11-11 | Nippon Kouatsu Electric Co | Failure point detection device |
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