CN2549476Y - Power transmission circuit ground lead monitor - Google Patents
Power transmission circuit ground lead monitor Download PDFInfo
- Publication number
- CN2549476Y CN2549476Y CN 02224167 CN02224167U CN2549476Y CN 2549476 Y CN2549476 Y CN 2549476Y CN 02224167 CN02224167 CN 02224167 CN 02224167 U CN02224167 U CN 02224167U CN 2549476 Y CN2549476 Y CN 2549476Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal source
- jcdl
- resistance
- coupling element
- 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
Links
Images
Abstract
The utility model discloses a power transmission circuit ground lead monitor with low cost and strong practicability for effectively preventing the switching on of the ground lead, which comprises a signal source E1, a detecting control alarming circuit JCDL, and a coupling element. One end of the coupling element is connected with a circuit XL and the other end is connected with the detecting control alarming circuit JCDL; the other end of the detecting control alarming circuit JCDL is connected with the signal source E1. The utility model is structurally characterized in that the coupling element is a switch-in resistance R1; the detecting control alarming circuit JCDL is internally provided with a measuring resistance R2; one end of the switch-in resistance R1 is connected with a power transmission circuit XL and the other end is connected with the measuring resistance R2; the other end of the measuring resistance R2 is connected with the signal source E1; the other end of the signal source E1 is connected to the ground; in order to prevent the opening circuit of a high voltage loop, protecting resistances R3 are arranged at the two ends of the signal source E1. The utility model is characterized by simple structure, strong practicability and high reliability.
Description
Technical field:
The utility model belongs to electric system and prevents a kind of automatic detection and control device of closing a floodgate with ground wire, specifically a kind of transmission line of electricity ground wire supervising device.
Background technology:
When one section circuit or certain device fails need interruption maintenance in the electric system, for guaranteeing staff's safety, must on the equipment of staff work place, install ground wire, again ground wire is removed behind the end-of-job, and then restored electricity.In practical operation, sometimes because of carelessness or other reasons, can appear at the phenomenon that just restores electricity before ground wire not being removed, cause the major accident of switching on earth wire, for preventing the generation of this type of accident, the existing now control device that prevents switching on earth wire.The device that prevents switching on earth wire such as the patent No. of using is 88109709.8 at present, denomination of invention is " preventing the switching on earth wire automaton ", it is to utilize resonance principle to detect transmission line of electricity whether ground wire is arranged, the Coupling device of this device adopts power capacitor, expense costliness, no actual application value, in addition, the long wave transmission channel constitutes by the three-phase shortcircuit line, if ground wire has one to contact bad or do not connect, will can not receive detection signal and wrong sends no ground line signals; Patent No. 92206105.X for another example; name is called " device that prevents switching on earth wire "; this device adopts the achieve a butt joint detection of ground wire of high-frequency signal detection method; because coupling element adopts high-voltage capacitor and filter joint; cost is too high; rig-site utilization is difficult to realize; in addition; there is deadly defect equally in this device: because high frequency signal generator directly is connected with primary equipment; do not take any safeguard measure; if the high frequency signal generator open circuit can be introduced secondary circuit with high pressure, cause equipment to damage and personnel casualty accidents.
Summary of the invention:
The purpose of this utility model provides a kind of simple in structure, and is with low cost, practical, can effectively prevent the supervising device of switching on earth wire.
The utility model is to realize its goal of the invention by the following technical solutions, a kind of transmission line of electricity ground wire supervising device, it comprises signal source E1, detect control warning circuit JCDL, coupling element, one end of coupling element is connected with circuit XL, the other end is connected with detection control warning circuit JCDL, the other end that detects control warning circuit JCDL is connected with signal source E1, its technical characterstic is that described coupling element is for inserting resistance R 1, in detecting control warning circuit JCDL, be provided with measuring resistance R2, an end that inserts resistance R 1 links to each other with transmission line of electricity XL, the other end links to each other with measuring resistance R2, the other end of measuring resistance R2 links to each other with signal source E1, the other end ground connection of signal source E1.
For preventing the high tension loop open circuit, be provided with protective resistance R3 at the two ends of signal source E1.
The characteristics of this utility model are to utilize the electric resistance partial pressure principle, test line is applied test signal (can be voltage source, current source, high-frequency signal source or other signal sources) to be detected, whether circuit on have ground wire, thereby reach the purpose that prevents switching on earth wire if judging.
Because adopt above technical scheme, the utility model is ideally realized its goal of the invention, and have characteristics such as simple in structure, with low cost, reliability height, can prevent that mistake is closed isolating switch to the generation of just sending electric major accident at the circuit of interruption maintenance in the maintenance process; Prevent to overhaul the back of being completed and send the generation of electric major accident to the circuit of not removing ground wire as yet.
Description of drawings:
Accompanying drawing is a circuit connection diagram of the present utility model.
Embodiment:
By accompanying drawing as can be known, a kind of transmission line of electricity ground wire supervising device, it comprises signal source E1, detect control warning circuit JCDL, coupling element, one end of coupling element is connected with circuit XL, the other end is connected with detection control warning circuit JCDL, the other end that detects control warning circuit JCDL is connected with signal source E1, its technical characterstic is that described coupling element is for inserting resistance R 1, in detecting control warning circuit JCDL, be provided with measuring resistance R2, an end that inserts resistance R 1 links to each other with transmission line of electricity XL, the other end links to each other with measuring resistance R2, and the other end of measuring resistance R2 links to each other with signal source E1, the other end ground connection of signal source E1.
For preventing the high tension loop open circuit, be provided with protective resistance R3 at the two ends of signal source E1.
The characteristics of this utility model are to utilize the electric resistance partial pressure principle, test line is applied test signal (can be voltage source, current source, high-frequency signal source or other signal sources) to be detected, whether circuit on have ground wire, thereby reach the control purpose that prevents switching on earth wire if judging.
The parameter of each components and parts is as follows:
E1: constant pressure source provides 25～36V DC voltage (or other signal sources).
R1: high pressure inserts resistance, should select the above resistance of resistance value 20 megaohms.
JCDL: detect the control warning circuit, be made up of measuring resistance R2, voltage relay, control circuit, filtering circuit, these all are common circuit common, do not describe in detail.
R2: measuring resistance, by different electric pressures, resistance value is preferably (1/100～1/1000) R1.
R3: protective resistance, prevent the high tension loop open circuit, resistance is less than or equal to R2
Ui: detect the loop input voltage.
U0: detecting output voltage loop, equal 0V when circuit is unearthed, is 100～200mV during line-to-ground.
HE: high voltage electroscope, its effect are to make when portable when this device, prevent mistakenly entering charged chamber.
The detection principle is as follows:
Person on duty's zygonema way switch, operating grip (or button) is connected and is detected the loop when pre-closing position.
If transmission line of electricity is charged or circuit on induced voltage higher → detect the alternating voltage relay startups → startup alarm circuit of control warning circuit (JCDL), the prompting person on duty: circuit is charged; Simultaneously, allow the closing relay operation.
If transmission line of electricity is not charged or induced voltage is lower than when detecting the alternating voltage relay startup value of controlling warning circuit (JCDL): (1) when transmission line of electricity did not have ground wire, U0=0V allowed the closing relay operation.When (2) transmission line of electricity has ground wire, U0 〉=100mV, the DC voltage relay that detects control circuit (JCDL) starts, and does not allow the closing relay operation.
The course of action in breaker closing loop is here no longer described.
Claims (2)
1, a kind of transmission line of electricity ground wire supervising device, it comprises signal source E1, detect control warning circuit JCDL, coupling element, one end of coupling element is connected with circuit XL, the other end is connected with detection control warning circuit JCDL, the other end that detects control warning circuit JCDL is connected with signal source E1, it is characterized in that described coupling element is for inserting resistance R 1, in detecting control warning circuit JCDL, be provided with measuring resistance R2, an end that inserts resistance R 1 links to each other with transmission line of electricity XL, the other end links to each other with measuring resistance R2, the other end of measuring resistance R2 links to each other with signal source E1, the other end ground connection of signal source E1.
2, a kind of transmission line of electricity ground wire supervising device according to claim 1 is characterized in that being provided with protective resistance R3 at the two ends of signal source E1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02224167 CN2549476Y (en) | 2002-05-30 | 2002-05-30 | Power transmission circuit ground lead monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02224167 CN2549476Y (en) | 2002-05-30 | 2002-05-30 | Power transmission circuit ground lead monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2549476Y true CN2549476Y (en) | 2003-05-07 |
Family
ID=33701669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02224167 Expired - Fee Related CN2549476Y (en) | 2002-05-30 | 2002-05-30 | Power transmission circuit ground lead monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2549476Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394204C (en) * | 2005-05-10 | 2008-06-11 | 唐渝隆 | Method for detecting ground wire of power transmission and distribution system |
| CN101713806B (en) * | 2008-10-31 | 2011-12-07 | 鞍钢集团矿业公司 | Ground wire automatic monitoring device |
| CN106093687A (en) * | 2016-07-28 | 2016-11-09 | 国网辽宁省电力有限公司丹东供电公司 | Intelligent anti-line with ground closes a floodgate and detects device |
-
2002
- 2002-05-30 CN CN 02224167 patent/CN2549476Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100394204C (en) * | 2005-05-10 | 2008-06-11 | 唐渝隆 | Method for detecting ground wire of power transmission and distribution system |
| CN101713806B (en) * | 2008-10-31 | 2011-12-07 | 鞍钢集团矿业公司 | Ground wire automatic monitoring device |
| CN106093687A (en) * | 2016-07-28 | 2016-11-09 | 国网辽宁省电力有限公司丹东供电公司 | Intelligent anti-line with ground closes a floodgate and detects device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1328588C (en) | Life-stopping intelligent inspection and inspector for leakage protector | |
| CN102077433B (en) | Circuit breaker with improved re-closing functionality | |
| CN1050238C (en) | Detector for monitoring integrity of ground connection of electrical appliance | |
| CN102981092B (en) | Detecting device of electric transmission circuit ground connection state | |
| CN106483423A (en) | A kind of trouble shoot method and device of breaker open operation electric loop | |
| CN201134662Y (en) | Leakage detecting and protecting device | |
| CN106711938A (en) | Leakage protector | |
| CN106655145A (en) | Battery bus voltage reverse connection protection circuit | |
| CN105675966A (en) | Fault arc detection method based on difference calculation and protection device thereof | |
| CN108089119B (en) | Secondary circuit electrification detection method and system for relay protection secondary equipment of transformer substation | |
| CN108459230A (en) | Electric high-voltage equipment fault detection method | |
| CN210129032U (en) | Device for on-line monitoring fault of current transformer | |
| CN104466943B (en) | Safety equipment and method for electric facility | |
| CN102385036B (en) | Method and circuit for detecting alternating-current fuse failure of uninterruptible power supply | |
| CN112531642B (en) | Residual current protection circuit and residual current protection device | |
| CN101902033B (en) | Intelligent protection device with zero pressure drop | |
| CN2549476Y (en) | Power transmission circuit ground lead monitor | |
| CN114487647A (en) | Mine explosion-proof electrical apparatus on-off capability detection system and service life assessment method | |
| CN201917625U (en) | Monitor for earth wire of power transmission line | |
| CN201699392U (en) | Electrical leakage protector for pressing machine | |
| CN101345408A (en) | Method for assigning a residual current to one of the three phase currents of a three-phase system and residual current protection switch | |
| CN211127104U (en) | Circuit breaker | |
| CN211426728U (en) | Wiring device for storage battery | |
| CN202693726U (en) | Detection circuit and detection system for electric transmission and transformation equipment | |
| CN202798004U (en) | Intelligent compound switch |
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 |