CN203164346U - Online detection device for on-off state of earthing knife-switch - Google Patents
Online detection device for on-off state of earthing knife-switch Download PDFInfo
- Publication number
- CN203164346U CN203164346U CN 201320092734 CN201320092734U CN203164346U CN 203164346 U CN203164346 U CN 203164346U CN 201320092734 CN201320092734 CN 201320092734 CN 201320092734 U CN201320092734 U CN 201320092734U CN 203164346 U CN203164346 U CN 203164346U
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- China
- Prior art keywords
- magnet ring
- ground connection
- disconnecting link
- signal processor
- connection disconnecting
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Abstract
The utility model relates to an online detection device for on-off state of an earthing knife-switch. The earthing knife-switch is connected between a cable outgoing line and a switch cabinet ground lead. The cable outgoing line is connected with a cable shielding layer ground lead. The detection device comprises a transmitting magnet ring, a reception ring, a transmitting box and a handheld control cabinet. The transmitting magnet ring is installed on the cable shielding layer ground lead. The transmitting box is connected with the transmitting magnet ring. The reception ring is installed on the switch cabinet ground lead. The handheld control cabinet is connected with the reception ring. Compared with the prior art, the device is advantaged by improving security and reliability of power supply, and has an adaptive adjusting function, and is wide in application range, etc.
Description
Technical field
The utility model relates to a kind of power equipment pick-up unit, especially relates to a kind of on-line measuring device of ground connection disconnecting link opening and closing state.
Background technology
Because in the equipment operating process, ground connection plug-in strip operating mechanism is because lever principle easily produces local prominent accumulated damage (metal fatigue) gradually, after certain cycle index, crack or take place suddenly fully that the possibility of the process of fracture exists, and the quality of material and manufacture craft more can influence the long-term regular event of mechanism.Therefore, through long-time running, the generation of the event of similar link rod fracture possibly can't be avoided.Ground connection switch operation connecting rod deforms and can cause indication and the physical location of ground connection disconnecting link position indicator not to be inconsistent.Owing to be subjected to 10kV switch gear room space constraint, operating personnel can't arrive 10kV switch cubicle rear side and check ground connection disconnecting link physical location in addition.Therefore, in deciliter ground connection switch operation, in the time of can't checking the plug-in strip physical location when foregoing problems occurring, this ground connection disconnecting link that do not close may cause maintainer's personal safety accident, and this branch separately then may not cause the power grid security accident.Improve switch cubicle ground connection plug-in strip and detect security and the reliability that can promote the switch cubicle operation.
Summary of the invention
The purpose of this utility model be exactly provide a kind of in order to overcome the defective that above-mentioned prior art exists and improve Supply Security and reliability, have the self-adaptation regulatory function, the on-line measuring device of ground connection disconnecting link opening and closing state applied widely.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of on-line measuring device of ground connection disconnecting link opening and closing state, described ground connection disconnecting link is connected between cable outlet and the switch cubicle ground wire, be connected with the cable shielding layer earthing line on the described cable outlet, described pick-up unit comprises the emission magnet ring, receives magnet ring, launch-box and hand-held control enclosure, described emission magnet ring is installed on the cable shielding layer earthing line, described launch-box is connected with the emission magnet ring, described reception magnet ring is installed on the switch cubicle ground wire, and described hand-held control enclosure is connected with the reception magnet ring.
Described launch-box comprises the signal power generator.
Described hand-held control enclosure comprises prime amplifier, Digital Bandpass Filter, analog to digital converter, LCDs, signal processor, function setting keyboard and power supply, described power supply connects prime amplifier respectively, Digital Bandpass Filter, analog to digital converter, LCDs, signal processor and function setting keyboard, one end of described prime amplifier is connected with the reception magnet ring, the other end connects Digital Bandpass Filter successively, analog to digital converter and signal processor, described signal processor connects LCDs respectively, function setting keyboard and prime amplifier.
Described signal processor is single-chip microcomputer.
Described Digital Bandpass Filter is digital narrow band filter.
Compared with prior art, the utlity model has following advantage:
1) the utility model can be identified the amplitude that receives signal, accurately judges deciliter state of ground connection disconnecting link, and the security of power supply and reliability are got a promotion;
2) the utility model can be regulated the gain multiple automatically, has the self-adaptation regulatory function, is fit to the state-detection of each model ground connection disconnecting link under the various operating modes;
3) the utility model adopts digital narrow band filter, has reduced the interference to measuring-signal, has guaranteed to receive the accuracy of signal.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
As shown in Figure 1, a kind of on-line measuring device of ground connection disconnecting link opening and closing state, described ground connection disconnecting link 1 is connected between cable outlet 2 and the switch cubicle ground wire, be connected with cable shielding layer earthing line 3 on the described cable outlet 2, described pick-up unit comprises emission magnet ring 4, receives magnet ring 6, launch-box 5 and hand-held control enclosure 14, described emission magnet ring 4 is installed on the cable shielding layer earthing line 3, described launch-box 5 is connected with emission magnet ring 4, described reception magnet ring 6 is installed on the switch cubicle ground wire, and described hand-held control enclosure 14 is connected with reception magnet ring 6.
Described launch-box 5 comprises the signal power generator.Described hand-held control enclosure 14 comprises prime amplifier 7, Digital Bandpass Filter 8, analog to digital converter 9, LCDs 10, signal processor 11, function setting keyboard 12 and power supply 13, described power supply 13 connects prime amplifier 7 respectively, Digital Bandpass Filter 8, analog to digital converter 9, LCDs 10, signal processor 11 and function setting keyboard 12, one end of described prime amplifier 7 is connected with reception magnet ring 6, the other end connects Digital Bandpass Filter 8 successively, analog to digital converter 9 and signal processor 11, described signal processor 11 connects LCDs 10 respectively, function setting keyboard 12 and prime amplifier 7.
In the present embodiment, the signal power generator is 7.8kHz signal power generator, can be used for measuring less capacitance. signal processor 11 adopts the MPS430 single-chip microcomputer, and this single-chip microcomputer is low in energy consumption, and various interface is perfect, and circuit is succinctly reliable.Described Digital Bandpass Filter 8 is digital narrow band filter, this numeral narrow band filter is made up of the LTC1067 of Linear Tech, sending and receiving are penetrated machine and are all adopted the frequency stabilization of crystal oscillator digital formula, and digital narrow band filter can reduce the interference to measuring-signal, guarantee to receive the accuracy of signal.The size of hand-held control enclosure 14 can be made as 135 * 70 * 24mm.Consider and change conveniently that power supply 13 adopts No. 5 lithium batteries of two joints.
The on-line measuring device principle of work of above-mentioned ground connection disconnecting link opening and closing state may further comprise the steps:
1) signal processor 11 arranges the gain multiple of prime amplifier 7 by function setting keyboard 12;
2) launch-box 5 sends signal, is coupled on the cable shield by emission magnet ring 4;
3) receive the signal that magnet ring 6 receives emission magnet ring 4;
4) hand-held control enclosure 14 will receive the signal that magnet ring 6 receives and send into signal processor 11 after amplification, filtering, digital-to-analog conversion processing, signal processor 11 is judged the closed situation of current ground connection disconnecting link according to the amplitude that receives signal, and with judgment result displays on LCDs 10.
There is coupling capacitance between cable core and the screen layer, constitutes electric loop by electric capacity between cable shielding layer earthing line and the cable grounding plug-in strip.After the ground connection plug-in strip closes, form the closed-loop path, by monitoring this tank capacitance size, can judge whether the ground connection plug-in strip is closed.
Described signal processor is regulated the gain multiple of prime amplifier automatically according to the size that receives signal.Monitoring gain can be set at the scene automatically, measure respectively the ground connection plug-in strip open with closure state under the reception signal value, definite value is set, thereby can sets monitor value according to each bar circuit concrete condition.The on-line measuring device of above-mentioned ground connection disconnecting link opening and closing state adopts on-the-spot automatic calibration system, need not manual intervention, and this device is as long as optimum working parameter can be demarcated and remember to practical operation once automatically.
Claims (5)
1. the on-line measuring device of a ground connection disconnecting link opening and closing state, described ground connection disconnecting link is connected between cable outlet and the switch cubicle ground wire, be connected with the cable shielding layer earthing line on the described cable outlet, it is characterized in that, described pick-up unit comprises the emission magnet ring, receives magnet ring, launch-box and hand-held control enclosure, described emission magnet ring is installed on the cable shielding layer earthing line, described launch-box is connected with the emission magnet ring, described reception magnet ring is installed on the switch cubicle ground wire, and described hand-held control enclosure is connected with the reception magnet ring.
2. the on-line measuring device of a kind of ground connection disconnecting link opening and closing state according to claim 1 is characterized in that, described launch-box comprises the signal power generator.
3. the on-line measuring device of a kind of ground connection disconnecting link opening and closing state according to claim 1, it is characterized in that, described hand-held control enclosure comprises prime amplifier, Digital Bandpass Filter, analog to digital converter, LCDs, signal processor, function setting keyboard and power supply, described power supply connects prime amplifier respectively, Digital Bandpass Filter, analog to digital converter, LCDs, signal processor and function setting keyboard, one end of described prime amplifier is connected with the reception magnet ring, the other end connects Digital Bandpass Filter successively, analog to digital converter and signal processor, described signal processor connects LCDs respectively, function setting keyboard and prime amplifier.
4. the on-line measuring device of a kind of ground connection disconnecting link opening and closing state according to claim 3 is characterized in that, described signal processor is single-chip microcomputer.
5. the on-line measuring device of a kind of ground connection disconnecting link opening and closing state according to claim 3 is characterized in that, described Digital Bandpass Filter is digital narrow band filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320092734 CN203164346U (en) | 2013-02-28 | 2013-02-28 | Online detection device for on-off state of earthing knife-switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320092734 CN203164346U (en) | 2013-02-28 | 2013-02-28 | Online detection device for on-off state of earthing knife-switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203164346U true CN203164346U (en) | 2013-08-28 |
Family
ID=49025523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320092734 Expired - Lifetime CN203164346U (en) | 2013-02-28 | 2013-02-28 | Online detection device for on-off state of earthing knife-switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203164346U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149496A (en) * | 2013-02-28 | 2013-06-12 | 上海市电力公司 | Online detection device and detection method for opening/closing state of grounding knife switch |
-
2013
- 2013-02-28 CN CN 201320092734 patent/CN203164346U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149496A (en) * | 2013-02-28 | 2013-06-12 | 上海市电力公司 | Online detection device and detection method for opening/closing state of grounding knife switch |
| CN103149496B (en) * | 2013-02-28 | 2016-02-03 | 上海市电力公司 | The on-line measuring device of grounding switch deciliter state and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |