CN204044338U - Portable DC mains analogue ground tester - Google Patents
Portable DC mains analogue ground tester Download PDFInfo
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- CN204044338U CN204044338U CN201420443748.4U CN201420443748U CN204044338U CN 204044338 U CN204044338 U CN 204044338U CN 201420443748 U CN201420443748 U CN 201420443748U CN 204044338 U CN204044338 U CN 204044338U
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- 238000012360 testing method Methods 0.000 claims abstract description 30
- 238000010422 painting Methods 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Abstract
The utility model relates to electric power DC earthing proving installation, is specially Portable DC mains analogue ground tester.Solve the problem not having special direct supply analogue ground proving installation in the market.This tester comprises box body, has test circuit in box body, and described test circuit is the first resistance R1, with the adjustable resistance RW of resistance value display disc and the series circuit of the second resistance R2; One end of series circuit connects the external wire of two outlet boxes, wherein a wire connecting test wire clamp, and another root wire connects the main schedule tip of the brushstyle of a writing or painting; The other end of series circuit connects the external wire of two outlet boxes, and wherein a wire connects earthing clamp, and another root wire connects negative test pencil end; The resistance value display disc of adjustable resistance RW is arranged on box body panel.The utility model novel in structural design, uniqueness, compact, portable, be the competent assistant that site work personnel carry out the analogue ground test of electric power source.
Description
Technical field
The utility model relates to electric power DC earthing proving installation, is specially Portable DC mains analogue ground tester.
Background technology
DC power system is mainly used in generating plant in electric system, power station and all kinds of transformer station; for the instrument in circuit-breaker switching on-off and secondary circuit, instrument, relay protection, emergency lighting with breaker device even load can not provide working dc power; its the whether normal safe and reliable operation directly affecting electric system; along with Automation of Electric Systems, computing machine control and the development of Power Electronic Technique and the needs of actual field operation and maintenance, to the requirement also corresponding raising of DC power system security.And because field condition is complicated, direct-flow electricity utilization apparatus is more, and the situation of DC power ground connection happens occasionally.In order to the normal operation of support equipment, need regularly analogue ground test to be carried out to DC power system and ensure that its function is normal.Current analogue ground test is just simple by between the resistance of fixed resistance value access DC power system both positive and negative polarity and the earth, can not adjusting resistance size, testing crew manual over the ground after can not show voltage-to-ground intuitively, not only efficiency low, test imperfect but also there is potential safety hazard.Also there is no special direct supply analogue ground tester in the market.
Summary of the invention
The utility model solves the problem not having special direct supply analogue ground proving installation in the market, provides a kind of Portable DC mains analogue ground tester.
The utility model adopts following technical scheme to realize: Portable DC mains analogue ground tester, comprise box body, there is test circuit in box body, described test circuit is the first resistance R1, with the adjustable resistance RW of resistance value display disc and the series circuit of the second resistance R2; One end of series circuit connects the external wire of two outlet boxes, wherein a wire connecting test wire clamp, and another root wire connects the main schedule tip of the brushstyle of a writing or painting; The other end of series circuit connects the external wire of two outlet boxes, and wherein a wire connects earthing clamp, and another root wire connects negative test pencil end; The resistance value display disc of adjustable resistance RW is arranged on box body panel.This tester need be equipped with a multimeter when using, and multimeter Gear Select Switch is rotated to shelves of direct voltage.On earthing clamp clips to " greatly ", test clamp clips on the negative or positive electrode of straight-flow system, and the main schedule tip of the brushstyle of a writing or painting and negative test pencil end directly insert voltage measurement hole and the common port COM hole of multimeter.Straight-flow system positive pole can be shown intuitively over the ground or negative pole voltage over the ground under different resistance by the resistance value display disc in the voltage instruction of multimeter and box body panel, greatly facilitate tester's observation.First resistance R1 and the second resistance R2 plays input protection effect.
The utility model gives a kind of Portable DC mains analogue ground tester, replenished the blank of prior art, the specification process of earthing test.Switch analogue ground resistance intuitive and convenient, on-the-spot test personnel can read voltage-to-ground intuitively on multimeter, for the fluctuation of observation DC bus voltage-to-ground provides great convenience of knowing clearly.The utility model novel in structural design, uniqueness, compact, portable, be the competent assistant that site work personnel carry out electric power DC source analogue ground test.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model test circuit.
In figure: 1-test clamp, the 2-main schedule tip of the brushstyle of a writing or painting, 3-earthing clamp, 4-bears test pencil end.
Embodiment
Portable DC mains analogue ground tester, comprises box body, has test circuit in box body, and described test circuit is the first resistance R1, with the adjustable resistance RW of resistance value display disc and the series circuit of the second resistance R2; One end of series circuit connects the external wire of two outlet boxes, wherein a wire connecting test wire clamp 1, and another root wire connects the main schedule tip of the brushstyle of a writing or painting 2; The other end of series circuit connects the external wire of two outlet boxes, and wherein a wire connects earthing clamp 3, and another root wire connects negative test pencil end 4; The resistance value display disc of adjustable resistance RW is arranged on box body panel.During concrete enforcement, adjustable resistance RW selects the miniwatt rheostat of RV24YN20S, 0-100K Ω, and the first resistance R1 and the second resistance R2 selects 2K Ω/4W.So, the earthing test demand of DC power system can be met.
Claims (2)
1. a Portable DC mains analogue ground tester, it is characterized in that: comprise box body, there is test circuit in box body, described test circuit is the first resistance (R1), with the adjustable resistance (RW) of resistance value display disc and the series circuit of the second resistance (R2); One end of series circuit connects the external wire of two outlet boxes, wherein a wire connecting test wire clamp (1), and another root wire connects the main schedule tip of the brushstyle of a writing or painting (2); The other end of series circuit connects the external wire of two outlet boxes, and wherein a wire connects earthing clamp (3), and another root wire connects negative test pencil end (4); The resistance value display disc of adjustable resistance (RW) is arranged on box body panel.
2. Portable DC mains analogue ground tester according to claim 1, is characterized in that: adjustable resistance (RW) selects RV24YN20S, the miniwatt rheostat of 0-100K Ω, the first resistance (R1) and the second resistance (R2) select 2K Ω/4W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420443748.4U CN204044338U (en) | 2014-08-07 | 2014-08-07 | Portable DC mains analogue ground tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420443748.4U CN204044338U (en) | 2014-08-07 | 2014-08-07 | Portable DC mains analogue ground tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204044338U true CN204044338U (en) | 2014-12-24 |
Family
ID=52244988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420443748.4U Active CN204044338U (en) | 2014-08-07 | 2014-08-07 | Portable DC mains analogue ground tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204044338U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793164A (en) * | 2015-03-31 | 2015-07-22 | 国家电网公司 | Branch insulation warning function verifying device of direct-current system |
| CN108562814A (en) * | 2018-04-24 | 2018-09-21 | 广东电网有限责任公司 | A kind of resistance device for DC system grounding experiment |
| CN110286334A (en) * | 2019-06-25 | 2019-09-27 | 哈尔滨锐驰风力发电有限责任公司 | A kind of DC power supply analogue ground test device |
-
2014
- 2014-08-07 CN CN201420443748.4U patent/CN204044338U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793164A (en) * | 2015-03-31 | 2015-07-22 | 国家电网公司 | Branch insulation warning function verifying device of direct-current system |
| CN108562814A (en) * | 2018-04-24 | 2018-09-21 | 广东电网有限责任公司 | A kind of resistance device for DC system grounding experiment |
| CN110286334A (en) * | 2019-06-25 | 2019-09-27 | 哈尔滨锐驰风力发电有限责任公司 | A kind of DC power supply analogue ground test device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |