CN207380175U - A kind of intelligence small current system earthing line selecting device - Google Patents
A kind of intelligence small current system earthing line selecting device Download PDFInfo
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- CN207380175U CN207380175U CN201721483515.7U CN201721483515U CN207380175U CN 207380175 U CN207380175 U CN 207380175U CN 201721483515 U CN201721483515 U CN 201721483515U CN 207380175 U CN207380175 U CN 207380175U
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- phototube coupling
- microprocessor
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Abstract
The utility model discloses a kind of intelligent small current system earthing line selecting devices, including apparatus main body, described device main body includes anti-interference and filter circuit, microprocessor, touch key-press, display, real-time clock, signal lamp, Phototube Coupling, communication bus, signal Phototube Coupling and tripping Phototube Coupling, anti-interference and filter circuit output terminal is microprocessor, the output terminal of touch key-press is microprocessor, the output terminal of microprocessor is respectively display, signal lamp, Phototube Coupling, signal Phototube Coupling and tripping Phototube Coupling, the connecting pin of microprocessor is real-time clock, the output terminal of Phototube Coupling is communication bus.The utility model is by using reduced instruction set computer (RISC) single chip microcontroller, data acquisition, computing, logic judgment, control output uniform velocity are fast, precision is high, carries " house dog " (Watchdog) circuit, the abilities such as anti-interference, self-test and self- recoverage are strong；Using 128 × 64 lattice lcd display, full chinesization, rich display information.
Description
Technical field
The utility model is related to line selection apparatus correlative technology field, more particularly to a kind of intelligent small current system earthing wire-selecting
Device.
Background technology
China power grid 35KV and following substation are connect mostly using isolated neutral mode or neutral point through arc suppression coil
Ground mode, for both earthing modes after single-phase earthing occurs in system, the electric current for flowing through earth point is equal to line distribution capacitance electricity
Stream, numerical value are smaller.Therefore, both earthing modes are referred to as small current neutral grounding mode.The advantages of small current neutral grounding system, is to send out
After raw single-phase earthing, system energy normal power supply, but due to fault signature unobvious so that quickly and accurately indicate earth-return circuit
There is certain difficulty.Therefore, it is necessary to solve the above problems to invent a kind of intelligent small current system earthing line selecting device.
Utility model content
The purpose of this utility model is to provide a kind of intelligent small current system earthing line selecting device, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the utility model provides following technical solution：A kind of intelligence small current system earthing wire-selecting
Device, including apparatus main body, described device main body include anti-interference and filter circuit, microprocessor, touch key-press, display,
Real-time clock, signal lamp, Phototube Coupling, communication bus, signal Phototube Coupling and tripping Phototube Coupling, it is described anti-interference and
The output terminal of filter circuit is microprocessor, and the output terminal of the touch key-press is microprocessor, the output of the microprocessor
End respectively display, signal lamp, Phototube Coupling, signal Phototube Coupling and tripping Phototube Coupling, the microprocessor
Connecting pin is real-time clock, and the output terminal of the Phototube Coupling is communication bus.
Preferably, described anti-interference and filter circuit, touch key-press, display, real-time clock, signal lamp, photoelectricity
Isolation, communication bus, signal Phototube Coupling and tripping Phototube Coupling are electrically connected with microprocessor.
Preferably, the display is lattice lcd display, and the communication bus is RS local communication buses.
Preferably, there are three described anti-interference and filter circuit is set, three anti-interference and filter circuit electrically connects respectively
The output terminal meet memory busbar A, memory busbar B and remember busbar C, the memory busbar A, remembered busbar B and remember busbar C is equal
For anti-interference and filter circuit.
Preferably, the output terminal of the communication bus is sub-line A, and the output terminal of the signal Phototube Coupling is sub-line B, institute
The output terminal for stating tripping Phototube Coupling is sub-line C.
Preferably, the communication bus is electrically connected with sub-line A, and the signal Phototube Coupling is electrically connected with sub-line B, institute
Tripping Phototube Coupling is stated to be electrically connected with sub-line C.
The technique effect and advantage of the utility model：The utility model is by using Atmel companies of U.S. reduced instruction set computer
(RISC) single chip microcontroller series CPU, data acquisition, computing, logic judgment, control output uniform velocity are fast, and precision is high, carries
" house dog " (Watchdog) circuit, the abilities such as anti-interference, self-test and self- recoverage are strong；Using 128 × 64 lattice lcd display
(LCD), full chinesization, rich display information；Intelligent software technology, principle is advanced, and performance is stablized, securely and reliably；It is aobvious in real time
Show the virtual value of system calendar, clock and four sections of bus residual voltages；It can quickly and accurately differentiate busbar or outlet ground connection；It is right
Busbar and outlet earth fault can provide alarm signal and show, preserves for information about；There is memory function, 30 times can be stored most
The fault message closely occurred, does not lose after power down；It is adjusted by menu prompt and panel button, debugs and safeguard simply, conveniently；
Configurable ground protection automatic trip；Hardware, software redundancy design, strong antijamming capability；Suitable for various voltage class
Property point isolated neutral system, Neutral Grounding through Resistance in Electrical system and neutral by arc extinction coil grounding system；Configure communication interface handle
Various fault messages are sent to relevant department, suitable for unattended operation transformer station；Aluminum Alloy Chassis, rear connect-disconnect structure, scene are adjusted
Examination is flexible；Using pluggable wire connection terminal, of fine quality durable, wiring is reliable.
Description of the drawings
Fig. 1 is the utility model structure connection diagram.
Fig. 2 is the utility model electric current transition diagram.
In figure：Anti-interference and filter circuit 1, microprocessor 2, touch key-press 3, display 4, real-time clock 5, signal designation
Lamp 6, Phototube Coupling 7, communication bus 8, signal Phototube Coupling 9, tripping Phototube Coupling 10, memory busbar A 11, memory busbar B
12nd, busbar C 13, sub-line A 14, sub-line B 15, sub-line C 16 are remembered.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
The utility model provides a kind of intelligent small current system earthing line selecting device as shown in Figs. 1-2, including device
Main body, described device main body include anti-interference and filter circuit 1, microprocessor 2, touch key-press 3, display 4, real-time clock 5,
Signal lamp 6, Phototube Coupling 7, communication bus 8, signal Phototube Coupling 9 and tripping Phototube Coupling 10, described anti-interference and filter
The output terminal in ripple circuit 1 is microprocessor 2, and the output terminal of the touch key-press 3 is microprocessor 2, the microprocessor 2 it is defeated
Outlet be respectively display 4, signal lamp 6, Phototube Coupling 7, signal Phototube Coupling 9 and tripping Phototube Coupling 10, it is described micro-
The connecting pin of processor 2 is real-time clock 5, and the output terminal of the Phototube Coupling 7 is communication bus 8.
Described anti-interference and filter circuit 1, touch key-press 3, display 4, real-time clock 5, signal lamp 6, photoelectricity every
It is electrically connected from 7, communication bus 8, signal Phototube Coupling 9 and tripping Phototube Coupling 10 with microprocessor 2；The display 4
For lattice lcd display, the communication bus 8 is RS485 local communication buses；Described anti-interference and filter circuit 1 is provided with
Three, three anti-interference and memory busbar A 11, memory busbar B 12 and memory busbar C is electrically connected in filter circuit 1
13, the output terminal for remembering busbar A 11, memory busbar B 12 and memory busbar C 13 is anti-interference and filter circuit 1；
The output terminal of the communication bus 8 is sub-line A 14, and the output terminal of the signal Phototube Coupling 9 is sub-line B 15, the tripping
The output terminal of Phototube Coupling 10 is sub-line C 16；The communication bus 8 is electrically connected with sub-line A 14, the signal Phototube Coupling
9 are electrically connected with sub-line B 15, and the tripping Phototube Coupling 10 and sub-line C 16 is electrically connected.
Usually there is following, i.e. isolated neutral mode in neutral nondirect earthing network；Through extinguishing arc
Coil earthing mode；Resistance grounded mode, such system is when occurring single-phase earthing, due to the electric current very little of trouble point, and
And the line voltage between three-phase keeps symmetrical substantially, and the power supply of load is not influenced, and therefore, all allows again under normal circumstances
Continue to run with 1~2 it is small when, without tripping immediately, this be using neutral point indirect earthing operation major advantage, but
After single-phase earthing, the voltage-to-ground of other two-phases will raise 3 times, and threat is caused to the insulation of equipment, if processing can not in time
Insulation breakdown, line to line fault can be developed into, arc discharge causes total system overvoltage.The further expansion of failure in order to prevent
Greatly, signal should be sent in time, so that operations staff takes measures to be eliminated.
The location design of isolated neutral system：
The electric current remembered in busbar A 11 is passed to by microprocessor 2, microprocessor 2 by anti-interference and filter circuit 1
Monitor the state of electric current in memory busbar A 11, and microprocessor in real time by display 4, real-time clock 5 and signal lamp 6
Device 2 carries out isolated neutral route selection by Phototube Coupling 7 and communication bus 8.
The location design of neutral by arc extinction coil grounding system：
The electric current remembered in busbar B 12 is passed to by microprocessor 2, microprocessor 2 by anti-interference and filter circuit 1
Monitor the state of electric current in memory busbar B 12, and microprocessor in real time by display 4, real-time clock 5 and signal lamp 6
Device 2 carries out neutral by arc extinction coil grounding route selection by signal Phototube Coupling 9.
The location design of Neutral Grounding through Resistance in Electrical system：
The electric current remembered in busbar C 13 is passed to by microprocessor 2, microprocessor 2 by anti-interference and filter circuit 1
Monitor the state of electric current in memory busbar C 13, and microprocessor in real time by display 4, real-time clock 5 and signal lamp 6
Device 2 carries out Neutral Grounding through Resistance in Electrical route selection by tripping Phototube Coupling 10.
Finally it should be noted that：The above is only the preferred embodiment of the utility model only, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it can still modify to the technical solution recorded in foregoing embodiments or to which part technical characteristic
Equivalent substitution is carried out, within the spirit and principle of the utility model, any modifications, equivalent replacements and improvements are made,
It should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of intelligence small current system earthing line selecting device, including apparatus main body, it is characterised in that：Described device main body includes
Anti-interference and filter circuit（1）, microprocessor（2）, touch key-press（3）, display（4）, real-time clock（5）, signal lamp
（6）, Phototube Coupling（7）, communication bus（8）, signal Phototube Coupling（9）With tripping Phototube Coupling（10）, described anti-interference and filter
Ripple circuit（1）Output terminal be microprocessor（2）, the touch key-press（3）Output terminal be microprocessor（2）, micro- place
Manage device（2）Output terminal be respectively display（4）, signal lamp（6）, Phototube Coupling（7）, signal Phototube Coupling（9）And jump
Lock Phototube Coupling（10）, the microprocessor（2）Connecting pin be real-time clock（5）, the Phototube Coupling（7）Output terminal be
Communication bus（8）.
2. a kind of intelligent small current system earthing line selecting device according to claim 1, it is characterised in that：It is described anti-interference
And filter circuit（1）, touch key-press（3）, display（4）, real-time clock（5）, signal lamp（6）, Phototube Coupling（7）, it is logical
Interrogate bus（8）, signal Phototube Coupling（9）With tripping Phototube Coupling（10）And microprocessor（2）It is electrically connected.
3. a kind of intelligent small current system earthing line selecting device according to claim 1, it is characterised in that：The display
（4）For lattice lcd display, the communication bus（8）For RS485 local communication buses.
4. a kind of intelligent small current system earthing line selecting device according to claim 1, it is characterised in that：It is described anti-interference
And filter circuit（1）There are three settings, three anti-interference and filter circuits（1）Memory busbar A is electrically connected（11）, memory
Busbar B（12）With memory busbar C（13）, the memory busbar A（11）, memory busbar B（12）With memory busbar C（13）Output
End is anti-interference and filter circuit（1）.
5. a kind of intelligent small current system earthing line selecting device according to claim 1, it is characterised in that：The communication is total
Line（8）Output terminal be sub-line A（14）, the signal Phototube Coupling（9）Output terminal be sub-line B（15）, the tripping photoelectricity
Isolation（10）Output terminal be sub-line C（16）.
6. a kind of intelligent small current system earthing line selecting device according to claim 1 or 5, it is characterised in that：It is described logical
Interrogate bus（8）With sub-line A（14）It is electrically connected, the signal Phototube Coupling（9）With sub-line B（15）It is electrically connected, the tripping
Phototube Coupling（10）With sub-line C（16）It is electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721483515.7U CN207380175U (en) | 2017-11-09 | 2017-11-09 | A kind of intelligence small current system earthing line selecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721483515.7U CN207380175U (en) | 2017-11-09 | 2017-11-09 | A kind of intelligence small current system earthing line selecting device |
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| CN207380175U true CN207380175U (en) | 2018-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690888A (en) * | 2019-09-29 | 2020-01-14 | 北京中科格励微科技有限公司 | Isolator for digital signals |
-
2017
- 2017-11-09 CN CN201721483515.7U patent/CN207380175U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690888A (en) * | 2019-09-29 | 2020-01-14 | 北京中科格励微科技有限公司 | Isolator for digital signals |
| CN110690888B (en) * | 2019-09-29 | 2022-10-14 | 北京中科格励微科技有限公司 | Isolator for digital signals |
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