CN204389594U - Large ground network earth resistance tester - Google Patents
Large ground network earth resistance tester Download PDFInfo
- Publication number
- CN204389594U CN204389594U CN201520083596.6U CN201520083596U CN204389594U CN 204389594 U CN204389594 U CN 204389594U CN 201520083596 U CN201520083596 U CN 201520083596U CN 204389594 U CN204389594 U CN 204389594U
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- Prior art keywords
- resistance tester
- earth resistance
- electric current
- ground network
- large ground
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Abstract
A kind of large ground network earth resistance tester, comprise main frame, power lead, ground stud and auxiliary pile, described main frame is provided with host panel, grounded screen port, voltage pole port and the extreme mouth of electric current is provided with from left to right successively above described host panel, described grounded screen port is connected to earth mat wiring pile, and voltage pole port is connected to voltage pole pile, the extreme mouth of electric current is connected to the stake of electric current polar region.The utility model earth resistance tester structure is simple, test circuit adopts variable frequency alternating current power source, and have employed DSP signal processing system, its inner integrated quick RAM, can independently effectively process through row multi-group data, and it is little to have volume, speed is fast, and the advantage of strong interference immunity, well solves the anti-interference problem in test process, and improve test speed and accuracy, volume is little, easy to carry, processing speed fast and the advantage of strong interference immunity to make this tester have.
Description
Technical field
The utility model relates to electrical devices field, especially a kind of large ground network earth resistance tester.
Background technology
At present in electric system, the test of the stake resistance of large ground network mainly adopts power frequency heavy-current three electrode method to measure; In order to prevent the Hz noise produced during operation of power networks, improve the accuracy of measurement result, the test current of insulation preventive trial regulations stipulate power frequency heavy-current method must not be less than 30 amperes, most of tester uses single-chip microcomputer as data handling component simultaneously, easily be subject to the impact of earth mat fluctuation, exist simultaneously volume comparatively large, carry inconvenience, the problem of complicated operation.Inconvenience is brought to user.
Utility model content
The utility model aims to provide a kind of large ground network earth resistance tester.
For achieving the above object, the utility model provides following technical scheme: a kind of large ground network earth resistance tester, comprise main frame, power lead, ground stud and auxiliary pile, described main frame is provided with host panel, grounded screen port, voltage pole port and the extreme mouth of electric current is provided with from left to right successively above described host panel, described grounded screen port is connected to earth mat wiring pile, and voltage pole port is connected to voltage pole pile, the extreme mouth of electric current is connected to the stake of electric current polar region; On the right side of host panel, top is provided with ground wire connection terminal, and be provided with display and printer successively from top to bottom below left side, described printer is for printing measurement data; Host panel lower right-hand side is provided with power switch, power socket and key zone, and described power socket, with insurance storehouse, is connected to power supply by power lead.
Preferably, described display is 128 × 64 lattice lcd display, for display menu and various information and measurement result.
Preferably, described power supply is alternating current 220V ± 10%, 50Hz power supply.
Preferably, described key zone is provided with multiple button, for controlling this large ground network earth resistance tester.
Compared with prior art, the beneficial effects of the utility model are: the utility model earth resistance tester structure is simple, test circuit adopts variable frequency alternating current power source, and have employed DSP signal processing system, its inner integrated quick RAM, can independently effectively process through row multi-group data, and it is little to have volume, speed is fast, the advantage of strong interference immunity, well solve the anti-interference problem in test process, and improve test speed and accuracy, this tester is had, and volume is little, easy to carry, processing speed fast and the advantage of strong interference immunity.
Accompanying drawing explanation
Fig. 1 is host panel schematic diagram of the present utility model;
Fig. 2 is measuring principle schematic diagram of the present utility model;
Fig. 3 is the circuit diagram of power circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1-3, in the utility model embodiment, a kind of large ground network earth resistance tester, comprise main frame, power lead, ground stud and auxiliary pile, described main frame is provided with host panel 1, is provided with the extreme mouth 10 of grounded screen port 8, voltage pole port 9 and electric current from left to right successively, during work above described host panel 1, grounded screen port 8 is connected to earth mat wiring pile, and voltage pole port 9 is connected to voltage pole pile, the extreme mouth 10 of electric current is connected to the stake of electric current polar region; On the right side of host panel 1, top is provided with ground wire connection terminal 7, below, left side is provided with display 3 and printer 2 from top to bottom successively, described display 3 is 128 × 64 lattice lcd display, and for display menu and various information and measurement result, described printer 2 is for printing measurement data; Host panel 1 lower right-hand side is provided with power switch 5, power socket 6 and key zone 4, described power socket 6, with insurance storehouse, is connected to alternating current 220V ± 10% by power lead, 50Hz power supply, described key zone 4 is provided with multiple button, for controlling this large ground network earth resistance tester.
Principle of work of the present utility model is: grounded screen port 8 is connected to earth mat wiring pile, and voltage pole port 9 is connected to voltage pole pile, the extreme mouth 10 of electric current is connected to the stake of electric current polar region, on the right side of host panel 1, top is provided with ground wire connection terminal 7, below, left side is provided with display 3 and printer 2 from top to bottom successively, described display 3 is 128 × 64 lattice lcd display, and for display menu and various information and measurement result, described printer 2 is for printing measurement data, host panel 1 lower right-hand side is provided with power switch 5, power socket 6 and key zone 4, described power socket 6 is with insurance storehouse, alternating current 220V ± 10% is connected to by power lead, 50Hz power supply, described key zone 4 is provided with multiple button, for controlling this large ground network earth resistance tester, power circuit is powered to detection system and DSP signal processing system, power circuit is also with the function of power alarm simultaneously, when system normal power supply, unidirectional thyristor RT in power-off protecting circuit is in backward stop state, therefore loudspeaker B does not work, when there is power-off in system, the gate pole of unidirectional thyristor RT has electric current to pass through, unidirectional thyristor RT conducting, loudspeaker B sends loud chimes of doom, user is reminded to adopt an effective measure in time, resistance meter adopts variable frequency alternating current power source, the difference of the output signal of the measuring resistance in earth mat and measuring resistance output signal is utilized to measure the size of earth mat resistance accurately, have employed DSP signal processing system simultaneously, its inner integrated quick RAM, can independently effectively process through row detection Data Data, by result reflection on a display screen, it is little that DSP signal processing system has volume, speed is fast, the advantage of strong interference immunity, well solve the anti-interference problem in test process, and improve test speed and accuracy, this tester is made to have volume little, easy to carry, the advantage of the fast and strong interference immunity of processing speed.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (4)
1. a large ground network earth resistance tester, comprise main frame, power lead, ground stud and auxiliary pile, it is characterized in that: described main frame is provided with host panel (1), described host panel (1) top is provided with grounded screen port (8), voltage pole port (9) and the extreme mouth of electric current (10) from left to right successively, described grounded screen port (8) is connected to earth mat wiring pile, and voltage pole port (9) is connected to voltage pole pile, the extreme mouth of electric current (10) is connected to the stake of electric current polar region; Top, host panel (1) right side is provided with ground wire connection terminal (7), and be provided with display (3) and printer (2) below left side from top to bottom successively, described printer (2) is for printing measurement data; Host panel (1) lower right-hand side is provided with power switch (5), power socket (6) and key zone (4), and described power socket (6), with insurance storehouse, is connected to power supply by power lead.
2. a kind of large ground network earth resistance tester according to claim 1, is characterized in that: described display (3) is 128 × 64 lattice lcd display, for display menu and various information and measurement result.
3. a kind of large ground network earth resistance tester according to claim 1, is characterized in that: described power supply is alternating current 220V ± 10%, 50Hz power supply.
4. a kind of large ground network earth resistance tester according to claim 1, is characterized in that: described key zone (4) are provided with multiple button, for controlling this large ground network earth resistance tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520083596.6U CN204389594U (en) | 2015-02-06 | 2015-02-06 | Large ground network earth resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520083596.6U CN204389594U (en) | 2015-02-06 | 2015-02-06 | Large ground network earth resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204389594U true CN204389594U (en) | 2015-06-10 |
Family
ID=53362302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520083596.6U Expired - Fee Related CN204389594U (en) | 2015-02-06 | 2015-02-06 | Large ground network earth resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204389594U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107765099A (en) * | 2017-10-19 | 2018-03-06 | 国家电网公司 | A kind of broadband test apparatus and method for being used to measure grounding body impedance |
| CN108490265A (en) * | 2018-04-24 | 2018-09-04 | 深圳远征技术有限公司 | Method of Testing Earth-Contact Resistance, device and tester |
-
2015
- 2015-02-06 CN CN201520083596.6U patent/CN204389594U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107765099A (en) * | 2017-10-19 | 2018-03-06 | 国家电网公司 | A kind of broadband test apparatus and method for being used to measure grounding body impedance |
| CN108490265A (en) * | 2018-04-24 | 2018-09-04 | 深圳远征技术有限公司 | Method of Testing Earth-Contact Resistance, device and tester |
| CN108490265B (en) * | 2018-04-24 | 2024-04-02 | 深圳远征技术有限公司 | Ground resistance testing method, device and tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150610 Termination date: 20200206 |