CN2306605Y - Excess current limiting wire-selecting apparatus for ground point of electric network - Google Patents
Excess current limiting wire-selecting apparatus for ground point of electric network Download PDFInfo
- Publication number
- CN2306605Y CN2306605Y CN 97224274 CN97224274U CN2306605Y CN 2306605 Y CN2306605 Y CN 2306605Y CN 97224274 CN97224274 CN 97224274 CN 97224274 U CN97224274 U CN 97224274U CN 2306605 Y CN2306605 Y CN 2306605Y
- Authority
- CN
- China
- Prior art keywords
- controller
- selection apparatus
- line selection
- microcomputer
- line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to an excess current limiting wire-selecting apparatus for a grounding point of an electric network, composed of a grounding transformer, a loading electrical regulating arc-eliminated reactor, a damping resistance box, a controller and a microcomputer wire-selecting apparatus. The utility model has the advantages of microcomputer SCM for controlling, reasonable design and high accuracy rate for finding fault, and is an excess current limiting wire-selecting apparatus for limiting excess current and fast finding fault.
Description
The utility model relates to a kind of threshold currents line selection apparatus, specifically a kind of earth point current limliting line selection apparatus.
Electrical network has capacitance profile over the ground, in case single-phase earthing takes place, will have capacitance current to flow through earth point.Electric current is excessive, will produce arc light, burns cable, causes power failure.For reducing earth current, the rules regulation is not more than 10A, can adopt to install arc suppression coil counteracting capacitance current additional.The manual turn-adjusting of the many employings of arc suppression coil at present, mainly there are two defectives in this kind arc suppression coil, at first changes tap joint position and need withdraw from the electrical network manual adjustments; Next does not have the function of measuring capacitance in real time electric current.In addition, install arc suppression coil additional after because the reducing of earth current increased the difficulty of searching faulty line, existing line selection apparatus is after being equipped with arc suppression coil, False Rate is very high.
The purpose of this utility model is providing a kind of electrical network earth point current limliting line selection apparatus, and this device can quick and precisely be measured capacitance current and can be from motion tracking and accurately search faulty line, in order to overcome the deficiency of existing usefulness device.
The purpose of this utility model can reach by following embodiment:
The utility model is made up of moving arc-suppression reactor Z, damping resistance case resistor R, controller and microcomputer line selection apparatus five parts of regulating of live grounding transformer B.The model of grounding transformer is SDJ, is used to produce neutral point, and can doublely make the station transformer.It is ZGTD that the moving model of regulating arc-suppression reactor Z of live is arranged, and is to have mixed the moving switch of live by the turn-adjusting arc suppression coil to constitute, and is installed under the neutral point.Damped resistor R is for the limiting displacement overvoltage, is serially connected between arc suppression coil and the ground.Controller is used to measure the earth point capacitance current, and the control arc suppression coil is transferred the files.Controller is the important component part of this device, adopts the microcomputer Single-chip Controlling, adopts real-time mensuration during measurement.Controller has the certainty of measurement height, Measuring Time is short, response time is fast, the number of times of transferring the files is few, and compensation way can be set benefit flexibly, owe to mend and three kinds of modes of minimum residual flow, and anti-interference ability is strong, pacify electric reliable characteristics, can fundamentally solve the problem of putting out certainly of ground connection, the microcomputer route selection is used for accurately the searching of faulty line, and adopts first-harmonic, harmonic wave and three kinds of clues of real component to search.
Circuit connecting relation of the present utility model is: electrical network ABC inserts grounding transformer B, grounding transformer B neutral point inserts isolating switch K, keep apart the K other end and have access to the moving arc-suppression reactor Z that regulates of live, reactor Z slip is stretched out end line and is met damped resistor R and connect controller, controller also has the short circuit contact of stretching out line and resistor R to join, and controller also joins with microcomputer single-chip microcomputer line selection apparatus.
The utility model has the advantages that and adopt single chip microcomputer to control, reasonable in design, be skillfully constructed, measurement, route selection accuracy rate height, the response time is short, and compensation way is flexible, and peace is closed reliable, is a kind of desirable electrical network earth point current limliting line selection apparatus.
Below in conjunction with accompanying drawing the utility model is described in further detail:
Fig. 1 is the utility model electrical schematic diagram
Fig. 2 is a microcomputer line selection apparatus electrical schematic diagram
Shown in Fig. 1-2, electrical network ABC inserts grounding transformer B (1), the grounding transformer neutral point inserts isolating switch K, the isolating switch K other end has access to the moving arc-suppression reactor Z (2) of adjusting of live, reactor Z (2) slip is stretched out end line and is met damped resistor R (3) and connect controller (4), controller (4) also has a short circuit contact of stretching out line and resistor R (3) to join, and controller (4) also joins with microcomputer single-chip microcomputer line selection apparatus (5).The contactor model of the short circuit contact of resistor R (3) is XDJ, and it is ZGTD that the model of the moving arc-suppression reactor Z of adjusting of live (2) is arranged, and the model of microcomputer single-chip microcomputer screening device (5) is ML-98H.
Claims (3)
1, a kind of electrical network earth point current limliting line selection apparatus.Include grounding transformer B (1), the moving arc-suppression reactor Z (2) of adjusting of live is arranged, damping resistance case resistor R (3), it is characterized in that it also has controller (4) and microcomputer line selection apparatus (5), its circuit connecting relation is: electrical network ABC inserts grounding transformer B (1), grounding transformer B (1) neutral point inserts isolating switch K, the isolating switch K other end has access to the moving arc-suppression reactor Z (2) of adjusting of live, reactor Z (2) slip is stretched out end line and is met damped resistor R (3) and connect controller (4), controller (4) also has a short circuit contact of stretching out line and resistor R (3) to join, and controller (4) also joins with microcomputer single-chip microcomputer line selection apparatus (5).
2, current limliting line selection apparatus according to claim 1 is characterized in that it by controller (4) measurement earth point capacitance current, and the gear shift of control arc suppression coil.
3, according to the described current limliting line selection apparatus of claim 1, it is characterized in that: microcomputer line selection apparatus (5) is searched faulty line, adopts first-harmonic, the circuit of harmonic wave and three kinds of clues of real component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97224274 CN2306605Y (en) | 1997-08-14 | 1997-08-14 | Excess current limiting wire-selecting apparatus for ground point of electric network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97224274 CN2306605Y (en) | 1997-08-14 | 1997-08-14 | Excess current limiting wire-selecting apparatus for ground point of electric network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2306605Y true CN2306605Y (en) | 1999-02-03 |
Family
ID=33938686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97224274 Expired - Fee Related CN2306605Y (en) | 1997-08-14 | 1997-08-14 | Excess current limiting wire-selecting apparatus for ground point of electric network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2306605Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453119B (en) * | 2007-11-29 | 2011-08-31 | 上海蓝瑞软件技术有限公司 | Passive damp resistance throw-cut device |
| CN102916414A (en) * | 2012-11-06 | 2013-02-06 | 上海市电力公司 | Direct current and alternating current limiting device |
| CN103384066A (en) * | 2013-06-25 | 2013-11-06 | 合肥天海电气技术有限公司 | Automatic tracking compensation system of turns adjusting type arc suppression coil |
| EP3605768A4 (en) * | 2017-07-06 | 2020-12-30 | Changsha University of Science and Technology | Safe processing method for active voltage reduction of ground fault phase of non-effective grounding system |
-
1997
- 1997-08-14 CN CN 97224274 patent/CN2306605Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101453119B (en) * | 2007-11-29 | 2011-08-31 | 上海蓝瑞软件技术有限公司 | Passive damp resistance throw-cut device |
| CN102916414A (en) * | 2012-11-06 | 2013-02-06 | 上海市电力公司 | Direct current and alternating current limiting device |
| CN103384066A (en) * | 2013-06-25 | 2013-11-06 | 合肥天海电气技术有限公司 | Automatic tracking compensation system of turns adjusting type arc suppression coil |
| EP3605768A4 (en) * | 2017-07-06 | 2020-12-30 | Changsha University of Science and Technology | Safe processing method for active voltage reduction of ground fault phase of non-effective grounding system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |