CN1360212A - Single-phase wire hanging type small current earth fault indicator - Google Patents
Single-phase wire hanging type small current earth fault indicator Download PDFInfo
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- CN1360212A CN1360212A CN 00132100 CN00132100A CN1360212A CN 1360212 A CN1360212 A CN 1360212A CN 00132100 CN00132100 CN 00132100 CN 00132100 A CN00132100 A CN 00132100A CN 1360212 A CN1360212 A CN 1360212A
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- 238000000926 separation method Methods 0.000 claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 10
- 238000004804 winding Methods 0.000 claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The invention provides a single-phase wire hanging type low-current earth fault indicator which can be hung on any phase and any point on a three-phase power circuit. The device comprises a self-induction power supply, a sampling processing circuit, an execution circuit and a display part, wherein the sampling processing circuit consists of a quintic harmonic signal acquisition winding wound on a high-permeability suspension loop, a harmonic separation resonance amplifying circuit connected with the winding and a time delay circuit connected with the harmonic separation resonance amplifying circuit through an electronic switch circuit, the execution circuit consists of two controllable silicon, an electromagnet F, two capacitors oppositely connected to two ends of a coil of the electromagnet F, a bidirectional trigger diode connected between the two controllable silicon in series, a voltage stabilizing tube, a peripheral element resistor and a diode, the display part consists of a signal disc which is arranged in a magnetic field of the electromagnet and can rotate in a half-cycle reciprocating manner, and a permanent magnet ring controlled by the electromagnet is arranged on a rotating shaft of the signal disc.
Description
What the present invention relates to is a kind of take up an official post fault detector of a phase, any point of three-phase power circuit that is mounted on.What be particularly related to is the indicator of single-phase grounded malfunction in grounded system of low current.
The power circuit total length that power distribution network occupies in electric system reaches system-wide more than 70%.And this system belongs to isolated neutral or through the structure of grounding through arc.This small current neutral grounding system only produces the fault current more much smaller than normal load current value when singlephase earth fault takes place, damage gentlyer so the destructive power of trouble spot is little, and extremely difficulty is searched; But this fault is in case take place just to cause trouble spot electric shock people and animals easily and bring out serious short trouble.The more important thing is that this fault accounts for distribution system total failare rate up to 80%.At present the unidirectional earth protective device of microcomputer type that adopts can only be judged the trouble spot and occurs in and (be called " line selection apparatus ") on that circuit and can not point out the particular location of trouble spot; The another kind of device relevant with present technique is that I am to disclose " high-performance electric power line fault indicator " among the ZL00222219.1 in the patent No..The principal feature of this indicator is the improvement of its power unit, by having a smocking at the ring-type iron core on the power circuit be wrapped in power supply on the iron core and gather self-inducting power unit and original short trouble sampling, execution, the display part branch that electromagnetic oscillation loop, voltage doubling rectifing circuit and electrical power storage circuit that coil L1, the capacitor C 15 that is connected in the coil two ends, C16 and stabilivolt W1, W2 constitute constitute and constitute.This indicator can not indicate the fault of aforesaid small current neutral grounding system.
The objective of the invention is to overcome the above-mentioned shortcoming of prior art, a kind of hung indicator for low-current grounding failure of single-phase transmission line on the single-phase transmission line, that can indicate single-phase grounded malfunction in grounded system of low current that is mounted on is provided.
The hung indicator for low-current grounding failure of single-phase transmission line of realizing the object of the invention is by having a self-inducting power supply that can be mounted on the high magnetic conduction link on the line of electric force, the sampling processing circuit, executive circuit and display part branch constitute, described sampling processing circuit is by the quintuple harmonics signals collecting winding L 2 that is wrapped on the high magnetic conduction link, harmonic separation oscillator amplifier circuit that joins with winding L 2 and the delay circuit that joins by an electronic switching circuit and this harmonic separation oscillator amplifier circuit constitute, described executive circuit is by controllable silicon KH, KB, electromagnet F, be connected the capacitor C 9 at the coil L4 two ends of electromagnet F in opposite directions, C10, be serially connected in the bidirectional trigger diode XKF between controllable silicon KH anode and the KB trigger electrode, stabilivolt ZF and peripheral cell R9, R10, R11, R12, diode ZS3, ZS2, ZS3 constitutes, but described display part is made of signal panels that are installed in the reciprocal rotation of half cycle in the electromagnet magnetic field, and a permanent magnetic ring that is controlled by electromagnet is housed in the rotating shaft of signal panels.
Principle of work of the present invention is as follows:
Offer other circuit use by the self-induction power unit acquisition power supply that is mounted on the single-phase electricity line of force.Give the harmonic separation oscillator amplifier circuit by quintuple harmonics signals collecting winding L 2 collection voltage signals simultaneously and carry out the first-harmonic filtering, be tuned to quintuple harmonics, rectification is defeated by electronic switching circuit after handling, when voltage signal processed reaches the setting value of electronic switching circuit, the electronic switch conducting starts to be sent to the controllable silicon KH of executive circuit trigger electrode after delay circuit reaches certain hour, the electric charge (being forward current) that the KH conducting stores capacitor C 9 flows through the coil L4 of electromagnet F, thereby make the action of a magnetic field that electromagnet F produces in the signal panels rotating shaft permanent magnetic ring and make magnet ring rotation half cycle, even signal panels have rotated half cycle, thereby indicate fault has taken place.When non-fault, positive supply is charged to capacitor C 9, C10 the magnitude of voltage of a certain setting rapidly, cause bidirectional trigger diode XKF and stabilivolt ZF to reach the trigger gate limit value, make controllable silicon KB conducting, give reciprocal electric current of coil L4 of electromagnet F, make the reversing of electromagnet F, the drive signal dish resets.
Contain a large amount of and very stable these characteristics of quintuple harmonics composition in electric current when this fault detector utilizes small current neutral grounding system generation earth fault, this quintuple harmonics separated be used, the effect of delay circuit will come from the difference of having of other harmonic source of system quintuple harmonics signal of short duration, that cut in and out characteristics and come in addition, and judge quintuple harmonics intensity confirming whether earth fault takes place, thereby realized to indicate exactly at any time the purpose of the fault of small current neutral grounding system by the threshold values of electronic switching circuit.
The present invention compared with prior art has the following advantages:
1. need not to be equipped with battery, reduced volume and weight greatly, thereby can directly be mounted on the line of electric force and use, at a glance the direct out of order occurrence positions of indication;
2. reliable in action, and avoided the generation of misoperation effectively;
3. the harmonic separation oscillator amplifier circuit of this indicator need not to add active device such as semiconductor amplification and can constitute, thereby does not take the electric energy in the indicator, thereby the power consumption that has guaranteed whole indicator only just can be satisfied by the self-induction type power supply;
Below in conjunction with drawings and Examples the present invention is described in further details.But content of the present invention is not limited in this embodiment.
The principle frame of Fig. 1 present embodiment
Fig. 2 structure skeleton view of the present invention
The A of Fig. 3 Fig. 2 is to partial view
The electrical block diagram of Fig. 4 present embodiment
Referring to Fig. 1～4, the present invention constitutes by having inductive power supply and sampling processing circuit, executive circuit and a display part branch that can be mounted on the high magnetic conduction link 1 on the line of electric force 5.Described sampling processing circuit is by the quintuple harmonics signals collecting winding L 2 that is wrapped on the high magnetic conduction link, harmonic separation oscillator amplifier circuit that joins with winding L 2 and the delay circuit that joins by an electronic switch and this harmonic separation oscillator amplifier circuit constitute, described executive circuit (referring to Fig. 4) is by controllable silicon KH, KB, electromagnet F, be connected the capacitor C 9 at the coil L4 two ends of electromagnet F in opposite directions, C10, be serially connected in the bidirectional trigger diode XKF between controllable silicon KH and the KB, stabilivolt ZF and peripheral cell R9, R10, R11, R12, diode ZS1, ZS2, ZS3 constitutes, but described display part by one be installed in the field of magnetic forece of electromagnet F half cycle back and forth the signal panels 2 of rotation constituted, a permanent magnetic ring 4 that is controlled by electromagnet F is housed in the rotating shaft 3 of signal panels 2.
In the present embodiment, the self-induction power unit is continued to use prior art and is constituted, and is promptly boosted to 4 voltage multiplying rectifiers heap Z2 rectification through current-limiting resistance R8 by L1, inserts after C8 filtering and the energy storage to other circuit supply.Two stabilivolts that oppositely connect of ZV1, ZV2 have limited the burr shape peak pressure value of excess, have protected Z2.The twin-T bridge wave filter that the harmonic separation oscillator amplifier circuit constitutes by matching transformer T1, by C1, C2, C3, R1, R2, R3 and filter resonance transformer T2, full wave rectifier Z and resistance R 4, R14, capacitor C 4, C5 are constituted.Wherein, by passing to filter resonance transformer T2 behind the twin-T bridge wave filter filtering 50Hz fundamental voltage, at 50Hz the first-harmonic energy is decayed to the negligible order of magnitude by R4 consumption by N2 and C5 resonance, and winding N3 among the T2 and capacitor C 4 are tuned to quintuple harmonics, are defeated by electronic switching circuit after full wave rectifier Z rectification.Electronic switching circuit is made of the potentiometer RT that adjusts, stabilivolt ZK and triode BG, is connected between harmonic separation oscillator amplifier circuit and the delay circuit.Delay circuit is made up of integrated circuit 4061 and peripheral cell R5, R6, R7, C6, C7.When the signal voltage that provides as Z and RT surpasses the threshold voltage of ZK, triode BG conducting, the positive power source terminal of integrated package 4061 obtains power supply, after time-delay a period of time to the executive circuit output current.The length of time-delay can adjust the capacity of C6 and the resistance of R5 is determined.When belonging to other harmonic source of system, the source of quintuple harmonics causes, even amplitude surpasses setting valve, but because it can not continue several minutes or the longer time, as long as harmonic value one reduces or disappears in a flash, this moment, the Z supply voltage disappeared, triode BG ends immediately, integrated package 4601 loses positive supply, from the beginning time count again, because of not reaching the time that delay circuit is set, executive circuit can not move, thereby has just protected when having only real generation earth fault, and quintuple harmonics just sends indication in amplitude and duration when two conditions all satisfy.The annexation of each components and parts is referring to Fig. 4.Each circuit part can be contained in the housing 6, and referring to Fig. 2, signal panels 2 can be installed in the window 7 that housing offers with a rotating shaft 3.Observe for convenient, window 7 can be designed to a semicircle window of opening on housing bottom, referring to Fig. 3, can a semicircle be painted with white in its bottom with the transparent organic glass class material of white, and another semicircle then is transparence and serves as display window.Signal display panel 3 can corresponding be designed to the semicircle that its outside card branch is painted with two different colours, as a semicircle is painted redness, goes to when breaking down in transparent the window's position with caution.It is normal to represent that another semicircle then can be painted with white or green etc.
Claims (4)
1. hung indicator for low-current grounding failure of single-phase transmission line, by having a self-inducting power supply that can be mounted on the high magnetic conduction link on the line of electric force, the sampling processing circuit, executive circuit and display part branch constitute, it is characterized in that described sampling processing circuit is by the quintuple harmonics signals collecting winding L 2 that is wrapped on the high magnetic conduction link, harmonic separation oscillator amplifier circuit that joins with winding L 2 and the delay circuit that joins by an electronic switching circuit and this harmonic separation oscillator amplifier circuit constitute, described executive circuit is by controllable silicon KH, KB, electromagnet F, be connected the capacitor C 9 at the coil L4 two ends of electromagnet F in opposite directions, C10, be serially connected in the bidirectional trigger diode XKF between controllable silicon KH anode and the KB trigger electrode, stabilivolt ZF and peripheral cell R9, R10, R11, R12, diode ZS3, ZS2, ZS3 constitutes, but described display part is made of signal panels that are installed in the reciprocal rotation of half cycle in the electromagnet magnetic field, and a permanent magnetic ring that is controlled by electromagnet is housed in the rotating shaft of signal panels.
2. hung indicator for low-current grounding failure of single-phase transmission line as claimed in claim 1 is characterized in that twin-T bridge wave filter that described harmonic separation oscillator amplifier circuit constitutes by matching transformer T1, by C1, C2, C3, R1, R2, R3 and filter resonance transformer T2, full wave rectifier Z and resistance R 4, R14, capacitor C 4, C5 are constituted.
3. hung indicator for low-current grounding failure of single-phase transmission line as claimed in claim 1 is characterized in that described signal panels are installed in the display window.
4. hung indicator for low-current grounding failure of single-phase transmission line as claimed in claim 1 is characterized in that described electronic switching circuit is made of the potentiometer RT that adjusts, stabilivolt ZK and triode BG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00132100 CN1360212A (en) | 2000-12-18 | 2000-12-18 | Single-phase wire hanging type small current earth fault indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00132100 CN1360212A (en) | 2000-12-18 | 2000-12-18 | Single-phase wire hanging type small current earth fault indicator |
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| Publication Number | Publication Date |
|---|---|
| CN1360212A true CN1360212A (en) | 2002-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00132100 Pending CN1360212A (en) | 2000-12-18 | 2000-12-18 | Single-phase wire hanging type small current earth fault indicator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401078C (en) * | 2004-02-03 | 2008-07-09 | 台达电子工业股份有限公司 | Earth fault detection circuit for battery |
| CN102798789A (en) * | 2012-03-03 | 2012-11-28 | 深圳市南岛机电有限公司 | Abnormal fault flashing alarm indicating device of grounding system |
-
2000
- 2000-12-18 CN CN 00132100 patent/CN1360212A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401078C (en) * | 2004-02-03 | 2008-07-09 | 台达电子工业股份有限公司 | Earth fault detection circuit for battery |
| CN102798789A (en) * | 2012-03-03 | 2012-11-28 | 深圳市南岛机电有限公司 | Abnormal fault flashing alarm indicating device of grounding system |
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