CN201917627U - Portable direct-current grounding fault searching instrument - Google Patents
Portable direct-current grounding fault searching instrument Download PDFInfo
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- CN201917627U CN201917627U CN2010206311162U CN201020631116U CN201917627U CN 201917627 U CN201917627 U CN 201917627U CN 2010206311162 U CN2010206311162 U CN 2010206311162U CN 201020631116 U CN201020631116 U CN 201020631116U CN 201917627 U CN201917627 U CN 201917627U
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- grounding
- signal generator
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- chip microcomputer
- fault detector
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Abstract
The utility model relates to a portable direct-current grounding fault searching instrument, which realizes the accurate detection of difficult faults including indirect grounding, nonmetal grounding, loop grounding, positive-and-negative grounding, positive-negative balance grounding, multi-point grounding and the like of a direct-current system, and can accurately display a system voltage, a voltage to ground and grounding resistance. The searching instrument comprises a signal generator which is connected with a positive bus and a negative bus of the direct-current system as well as the ground; a fault detector is arranged at one side of the signal generator and connected with a signal collector through a connecting line; the signal generator comprises a single chip microcomputer which is connected with an ADC (Analog to Digital Converter) module, a DAC (Digital-to-Analog Converter) module and a current control module; and the fault detector comprises a single chip microcomputer which is connected with an ADC module.
Description
One, technical field:
The utility model relates to a kind of fault detect instrument, especially relates to a kind of Portable DC grounding fault instrument.
Two, background technology:
In the background technology, dc system grounding is a kind of easy generation and the fault bigger to electric system harm.Straight-flow system plus earth may cause protective relaying maloperation, because breaking coil connects dc power cathode, system has one point earth or defective insulation again, may cause the protection malfunction; The straight-flow system minus earth, system has one point earth or defective insulation again, can be with trip(ping) circuit or closing circuit short circuit; cause the protection tripping; this moment, system broke down, and the tripping of protection must cause systematic failures to enlarge, and also may burn out the contact of relay simultaneously or burn insurance.
Three, utility model content:
The utility model is in order to solve the weak point in the above-mentioned background technology, a kind of Portable DC grounding fault instrument is provided, it has solved the accurate detection of exceptional faults such as indirect earthed, the nonmetal ground connection of straight-flow system, loop ground connection, positive and negative while ground connection, positive negative balance ground connection, multipoint earthing, and can accurately shows system voltage, voltage-to-ground, ground connection resistance
For achieving the above object, the technical solution adopted in the utility model is:
A kind of Portable DC grounding fault instrument, it is characterized in that: comprise signal generator, signal generator links to each other with ground with the straight-flow system positive and negative busbar, and signal generator one side is provided with fault detector, is connected by connecting line between fault detector and the signal picker.
Above-mentioned signal generator comprises single-chip microcomputer, is connected with ADC module, DAC module and current control module on the single-chip microcomputer.
Above-mentioned fault detector comprises single-chip microcomputer, is connected with the ADC module on the single-chip microcomputer.
Compared with prior art, the advantage and the effect that the utlity model has are as follows:
The utility model can be applicable to the straight-flow system of any electric pressure, has been equipped with the high-precision test split-core type meter, has improved sensing range and antijamming capability greatly by the efficient processing to multiple signal; Adopt advanced computing method and fuzzy control theory, the insulation degree of the detected branch road form with insulation index and waveform has been showed, demonstrated fully the superiority of artificial intelligence; For concluding of earth point position, they have judgment accurately especially, and each detection can both be pointed out the direction of the relative check point in earth point position, thereby realize the detection of loop ground connection quickly and accurately.In addition, the user can be according to the equipment of self system's needs customized suitable insulation alarming threshold value in insulation alarming threshold value scope, user only gear on the split-core type meter and the range on the detecting device need the be mapped detection that just can realize DC earthing or the analysis of the degree of insulation.
Four, description of drawings:
Fig. 1 is the schematic block circuit diagram of signal generator;
Fig. 2 is the circuit theory diagrams of signal generator;
Fig. 3 is the program flow diagram of signal generator;
Fig. 4 is the schematic block circuit diagram of fault detector;
Fig. 5 is the circuit theory diagrams of fault detector;
Fig. 6 is the program flow diagram of fault detector
Five, embodiment:
The utility model comprises signal generator, and signal generator links to each other with ground with the straight-flow system positive and negative busbar, and signal generator one side is provided with fault detector, is connected by connecting line between fault detector and the signal picker.
Referring to Fig. 1 and Fig. 2, signal generator comprises single-chip microcomputer, is connected with ADC module, DAC module and current control module on the single-chip microcomputer.ADC adopts serial AD 654 chip circuits, and the system voltage of system is measured, and calculates ground connection positive voltage and negative voltage by the conversion gear.The fixed frequency current signal is by the certain amplitude size of CPU control output fixed frequency current signal.Pilot lamp has four kinds: power light, negative voltage pilot lamp, positive voltage pilot lamp, normal pilot lamp, and all the other pilot lamp all are that CPU controls pilot lamp by 74LS138 except that power light, pilot lamp control low level is effective.SC2272-M4 wireless module transmission data are adopted in wireless telecommunications, make signal generator and signal detector not need to transmit with line.Show and adopt 128X64 LCD module, white backlight.
Referring to Fig. 3, the program circuit of signal generator is:
1, beginning;
2, self check, initialization;
3, system voltage is measured;
4, the ground connection positive voltage is measured;
5, the ground connection negative voltage is measured;
6, grounding resistance measurement;
7, wireless module sends data;
8, finish.
Referring to Fig. 4 and Fig. 5, fault detector comprises single-chip microcomputer, is connected with the ADC module on the single-chip microcomputer.The ADC module adopts serial AD 654 chip circuits, adopts the little leakage current sampling of clamp meter to system, and the current signal of sampling is input to the input end of ADC through filter amplifying processing, handles calculating current value through CPU.Keyboard adopts three buttons: power key, reset key, range key.The power key switching on and shutting down; Reset key is one-shot measurement again; Range key range 1 and range 2 switch mutually.Pilot lamp has four kinds: range 1 pilot lamp, range 2 pilot lamp, communication pilot lamp, pilot lamp all are that pilot lamp control low level is effective by CPU control.SC2272-M4 wireless module transmission data are adopted in wireless telecommunications, make signal generator and fault detector not need to transmit with line.Show and adopt 128X64 LCD module, white backlight.
Referring to Fig. 6, the program circuit of fault detector is:
1, beginning;
2, self check, initialization;
3, detecting the battery electric quantity task, is to enter next step; Not then to enter for the 5th step;
4, the battery task is handled;
5, do you declare wireless communication task are arranged? have, enter next step; Then do not enter for the 7th step;
6, wireless telecommunications task is handled;
7, do you declare the key task are arranged? have, enter next step; Then do not enter for the 9th step;
8, the key task is handled;
9, do you declare range 1 task are arranged? have, enter next step; Then do not enter for the 9th step;
10, range 1 task is handled;
11, do you declare range 2 tasks are arranged? have, enter next step; Then do not enter for the 9th step;
12, range 2 tasks are handled;
13, do you declare the task of remeasuring? have, enter next step; Then do not return for the 3rd step;
14, remeasuring task handles.
Claims (3)
1. Portable DC grounding fault instrument, it is characterized in that: comprise signal generator, signal generator links to each other with ground with the straight-flow system positive and negative busbar, and signal generator one side is provided with fault detector, is connected by connecting line between fault detector and the signal picker.
2. a kind of Portable DC grounding fault instrument according to claim 1, it is characterized in that: signal generator comprises single-chip microcomputer, is connected with ADC module, DAC module and current control module on the single-chip microcomputer.
3. a kind of Portable DC grounding fault instrument according to claim 1, it is characterized in that: fault detector comprises single-chip microcomputer, is connected with the ADC module on the single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206311162U CN201917627U (en) | 2010-11-29 | 2010-11-29 | Portable direct-current grounding fault searching instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206311162U CN201917627U (en) | 2010-11-29 | 2010-11-29 | Portable direct-current grounding fault searching instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201917627U true CN201917627U (en) | 2011-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206311162U Expired - Lifetime CN201917627U (en) | 2010-11-29 | 2010-11-29 | Portable direct-current grounding fault searching instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201917627U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614627A (en) * | 2014-12-21 | 2015-05-13 | 深圳市柏特瑞电子有限公司 | Portable DC leakage detection positioning device and detection positioning method |
| CN106019049A (en) * | 2016-05-19 | 2016-10-12 | 国网新疆电力公司伊犁供电公司 | Auxiliary device for DC grounding search of transformer station |
-
2010
- 2010-11-29 CN CN2010206311162U patent/CN201917627U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614627A (en) * | 2014-12-21 | 2015-05-13 | 深圳市柏特瑞电子有限公司 | Portable DC leakage detection positioning device and detection positioning method |
| CN106019049A (en) * | 2016-05-19 | 2016-10-12 | 国网新疆电力公司伊犁供电公司 | Auxiliary device for DC grounding search of transformer station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Portable direct-current grounding fault searching instrument Effective date of registration: 20140527 Granted publication date: 20110803 Pledgee: Xi'an aviation base financing Company limited by guarantee Pledgor: Shaanxi Criane Electronic Co., Ltd. Registration number: 2014610000004 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20160202 Granted publication date: 20110803 Pledgee: Xi'an aviation base financing Company limited by guarantee Pledgor: Shaanxi Criane Electronic Co., Ltd. Registration number: 2014610000004 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Portable direct-current grounding fault searching instrument Effective date of registration: 20180822 Granted publication date: 20110803 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: Shaanxi Criane Electronic Co., Ltd. Registration number: 2018990000729 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190708 Granted publication date: 20110803 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: Shaanxi Criane Electronic Co., Ltd. Registration number: 2018990000729 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110803 |