CN102116790A - Improved direct current monitoring device - Google Patents
Improved direct current monitoring device Download PDFInfo
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- CN102116790A CN102116790A CN200910266139XA CN200910266139A CN102116790A CN 102116790 A CN102116790 A CN 102116790A CN 200910266139X A CN200910266139X A CN 200910266139XA CN 200910266139 A CN200910266139 A CN 200910266139A CN 102116790 A CN102116790 A CN 102116790A
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- direct current
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- 238000012806 monitoring device Methods 0.000 title claims abstract description 12
- 238000011897 real-time detection Methods 0.000 abstract description 2
- 230000002950 deficient Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010223 real-time analysis Methods 0.000 description 1
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Abstract
The invention relates to an improved direct current monitoring device which comprises a direct current relay, a buzzer, a dry battery, an over-voltage contact and a under-voltage contact, wherein the direct current relay is provided with a positive input end, a negative input end, an output end and an earth point; the output end of the direct current relay is connected with the over-voltage contact and the under-voltage contact respectively; when the input end of the direct current relay inputs the over-voltage, the direct current relay triggers the over-voltage contact to be closed; when the input end of the direct current relay inputs the under-voltage, the direct current replay triggers the underv-oltage contact to be closed; after the over-voltage contact is connected with the under-voltage contact in parallel, one end of the overv-oltage contact is connected with an anode of the dry battery, and the other end of the over-voltage contact is connected with the buzzer; and a cathode of the dry battery is connected with the buzzer. Compared with the prior art, the improved direct current monitoring device has the advantages of compact volume, light weight, real-time detection and the like.
Description
Technical field
The present invention relates to a kind of direct current (DC) monitoring device, especially relate to a kind of modified direct current (DC) monitoring device.
Background technology
Straight-flow system in the transformer station distributes wide, and the loop is various, is easy to break down or unusually, wherein modal up-set condition is a dc system grounding.
The operation practice shows, the straight-flow system one point earth causes isolating switch to be stolen easily and jumps.In addition, after in the straight-flow system one point earth taking place,, may cause the straight-flow system short circuit, and cause the direct supply interruption of power supply, or the accident that causes the isolating switch mistake to jump or refuse to jump takes place if more other place's ground connection is taken place.
For the stable operation of electrical network, must in time find the fault of straight-flow system, get rid of the hidden danger of straight-flow system as much as possible.
Straight-flow system in the transformer station distributes wide, and the loop is various, is easy to break down or unusually, wherein modal up-set condition is a dc system grounding.
The operation practice shows, the straight-flow system one point earth causes isolating switch to be stolen easily and jumps.In addition, after in the straight-flow system one point earth taking place,, may cause the straight-flow system short circuit, and cause the direct supply interruption of power supply, or the accident that causes the isolating switch mistake to jump or refuse to jump takes place if more other place's ground connection is taken place.
For the stable operation of electrical network, must in time find the fault of straight-flow system, get rid of the hidden danger of straight-flow system as much as possible.
After adopting our direct current abnormal detector, the sensitivity that DC earthing detects has improved greatly, also is real-time and effective to the record of failure condition.But blemish in an otherwise perfect thing is in time failure condition to be fed back to the field personnel.
Summary of the invention
Purpose of the present invention is exactly the modified direct current (DC) monitoring device that a kind of small volume and less weight is provided, detects in real time for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of modified direct current (DC) monitoring device, it is characterized in that, comprise DC relay, hummer, dry cell, the superpotential contact, the under-voltage contact, described DC relay is provided with electrode input end, negative input, output terminal, earth point, the output terminal of described DC relay respectively with the superpotential contact, the under-voltage contact connects, when the input end of DC relay is imported superpotential, DC relay triggers the superpotential junction closure, when the input end of DC relay is imported under-voltage, DC relay triggers the under-voltage junction closure, an end is connected with the positive pole of dry cell after described superpotential contact and the parallel connection of under-voltage contact, the other end is connected with hummer, and the negative pole of described dry cell is connected with hummer.
Also comprise panel, this panel is provided with LED display, superpotential pilot lamp, under-voltage pilot lamp.
Compared with prior art, the present invention has the following advantages:
1, obtaining raising greatly aspect the sensitivity that detects the straight-flow system unusual fluctuations;
2, aspect real-time, solved the defective that in time to understand alarm condition originally away from the working-yard, accomplished that real-time detection, real-time analysis, ground connection solve;
3, aspect applicability, broken away from original group screen and installed, accomplished small volume and less weight, use flexibly, be convenient to install, be beneficial to and carry.
Description of drawings
Fig. 1 is the schematic diagram of a kind of modified direct current (DC) monitoring device of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in Figure 1, a kind of modified direct current (DC) monitoring device, comprise DC relay 1, hummer 2, dry cell 3, superpotential contact 4, under-voltage contact 5, described DC relay establishes 1 electrode input end 6, negative input 7, output terminal 8, earth point 9, the output terminal 8 of described DC relay 1 respectively with superpotential contact 4, under-voltage contact 5 connects, promptly when the input end of DC relay 1 is imported superpotential, DC relay 1 triggers superpotential contact 4 closures, when the input end of DC relay 1 is imported under-voltage, DC relay 1 triggers under-voltage contact 5 closures, described superpotential contact 4 is connected with the positive pole of dry cell 3 with under-voltage contact 5 backs in parallel one end, the other end is connected with hummer 2, and the negative pole of described dry cell 3 is connected with hummer 2.
Also be provided with LED display, superpotential pilot lamp, under-voltage pilot lamp on this device panel.
The present invention has obtained good effect in using at the scene, satisfied the requirement of site operation, has remedied the defective of original supervisory system, has realized the function of expection.
During rig-site utilization, will install electrode input end 6 earlier and insert dc positive power and negative supply respectively, earth point 9 ground connection with negative input 7.LED display is shown as the positive voltage value.
During dc positive power ground connection, LED display shows that positive supply is 0V, and the under-voltage display lamp is bright, buzzer warning.
During dc negative supply ground connection, LED shows that positive supply is superpotential value, and the superpotential display lamp is bright, buzzer warning.
Also carried out the test of sensitivity of the present invention at the scene, when straight-flow system when being not more than 20K Ω resistance eutral grounding, the present invention can correct operation, the bright and buzzer warning of device pilot lamp, when stake resistance during greater than 30K Ω, device returns.The actuating range of dc voltage detecting device is 〉=60V or≤50V.
Claims (2)
1. modified direct current (DC) monitoring device, it is characterized in that, comprise DC relay, hummer, dry cell, the superpotential contact, the under-voltage contact, described DC relay is provided with electrode input end, negative input, output terminal, earth point, the output terminal of described DC relay respectively with the superpotential contact, the under-voltage contact connects, when the input end of DC relay is imported superpotential, DC relay triggers the superpotential junction closure, when the input end of DC relay is imported under-voltage, DC relay triggers the under-voltage junction closure, an end is connected with the positive pole of dry cell after described superpotential contact and the parallel connection of under-voltage contact, the other end is connected with hummer, and the negative pole of described dry cell is connected with hummer.
2. a kind of modified direct current (DC) monitoring device according to claim 1 is characterized in that, also comprises panel, and this panel is provided with LED display, superpotential pilot lamp, under-voltage pilot lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910266139XA CN102116790A (en) | 2009-12-30 | 2009-12-30 | Improved direct current monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910266139XA CN102116790A (en) | 2009-12-30 | 2009-12-30 | Improved direct current monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102116790A true CN102116790A (en) | 2011-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910266139XA Pending CN102116790A (en) | 2009-12-30 | 2009-12-30 | Improved direct current monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102116790A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI501496B (en) * | 2013-06-06 | 2015-09-21 | Chang Chun Petrochemical Co | Uninterruptible power protection apparatus and manufacturing system for producing electrolytic copper foil |
-
2009
- 2009-12-30 CN CN200910266139XA patent/CN102116790A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI501496B (en) * | 2013-06-06 | 2015-09-21 | Chang Chun Petrochemical Co | Uninterruptible power protection apparatus and manufacturing system for producing electrolytic copper foil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA SHANGHAI POWER TRA Free format text: FORMER OWNER: SHANGHAI POWER TRANSMISSION + TRANSFORMATION ENGINEERING CO., LTD. Effective date: 20121211 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20121211 Address after: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant after: Shanghai Electric Power Corporation Applicant after: State Grid Corporation of China Applicant after: Shanghai Transmission and Distribution Engineering Co.,Ltd. Address before: 200122 Shanghai City, Pudong New Area source deep road, No. 1122 Applicant before: Shanghai Electric Power Corporation Applicant before: Shanghai Transmission and Distribution Engineering Co.,Ltd. |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110706 |