CN203324449U - Electricity generator fault detecting device - Google Patents
Electricity generator fault detecting device Download PDFInfo
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- CN203324449U CN203324449U CN2013203526768U CN201320352676U CN203324449U CN 203324449 U CN203324449 U CN 203324449U CN 2013203526768 U CN2013203526768 U CN 2013203526768U CN 201320352676 U CN201320352676 U CN 201320352676U CN 203324449 U CN203324449 U CN 203324449U
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Abstract
The utility model relates to an electricity generator fault detecting device. The electricity generator fault detecting device is characterized by comprising an isolation type voltage regulator (T) and an AC current transformer (B). Two ends of an input winding of the isolation type voltage regulator (T) are connected with a power supply via a master switch (K). A first output terminal (A) and a second output terminal (N) are respectively led out of an output winding of the isolation type voltage regulator (T). The input winding of the AC current transformer (B) is connected with the first output terminal (A) and the second output terminal (N) of the isolation type voltage regulator (T), while the output winding of the AC current transformer (B) is connected with a bridge type rectification circuit. The utility model provides the electricity generator fault detecting device whose application ranges of fault detection comprise: electricity generator stator winding grounding fault detection, electricity generator rotor grounding fault detection, electricity generator rotor turns fault detection and electricity generator rotor winding open circuit fault detection. Besides, the electricity generator fault detecting device is also applicable to electric power cable short wire fault detection.
Description
Technical field
The utility model relates to a kind of generator failure detection instrument.
Background technology
The joint effect of the factor such as be heated in generator operation, electric, mechanical, chemical, make insulating property variation gradually; Add some special circumstances: in generator unit stator winding outlet short circuit, stator winding or many reasons of the aspects such as bottom temperature element short circuit and manufacturing process, all likely cause stator winding to be in operation or insulation breakdown earth fault occurs while testing.Turn-to-turn fault, earth fault and open fault, more easily occur in electricity, heat, chemical corrosion and electrodynamic action lower coil in the long-term High Rotation Speed of generator amature.After these faults occur generator, need fast, safety, detect trouble spot exactly, make unit energy with the fastest speed reparation operation.The test of generator earth fault, also do not have a kind of special detection instrument so far, caused very large difficulty to the test service work.
The utility model content
The purpose of this utility model be to provide a kind of simple to operate, the test accurate quick the generator failure detection instrument.
A kind of generator failure detection instrument, its special feature is: comprise the isolated voltage regulating device, the input winding two ends of this isolated voltage regulating device connect power supply by master switch, and draw respectively the first lead-out terminal and the second lead-out terminal on the output winding of this isolated voltage regulating device, thereby the isolation industrial frequency AC signal of directly exporting 0-250V, 0-5A is as detectable signal; Also comprise AC convertor, the input winding of this AC convertor connects the first lead-out terminal and second lead-out terminal of aforementioned isolated voltage regulating device, and the output winding of this AC convertor connects bridge rectifier circuit, thereby obtain DC power signal, as the generator rotor ground fault finding, use.
Wherein between the input winding of master switch and isolated voltage regulating device, also be provided with the self-locking switch circuit formed by relay and pushbutton switch.
Wherein also comprise the trigger and the trigger gauge tap that are in series, after both series connection, be connected in parallel in self-locking switch circuit, and the output terminal of this trigger with also be connected in parallel in self-locking switch circuit after the coil of an auxiliary reclay is connected, a pair of output contact of this auxiliary reclay is connected in the second lead-out terminal or the first lead-out terminal in addition.
Wherein between the first lead-out terminal and the second lead-out terminal, be parallel with voltage table, and be in series with reometer between the output winding of the first lead-out terminal and isolated voltage regulating device.
Wherein AC convertor is output as 0-600A.
Wherein also comprise that the hand-held electric current detects detector, this hand-held electric current detects detector and comprises handle, is equipped with on this handle between electromagnetic sensor and galvanometer and electromagnetic sensor and galvanometer and is electrically connected to.
Wherein handle is to be with chlamydate U-shaped iron core.
Wherein the output winding of isolated voltage regulating device is connected with AC convertor by the selection terminal, or is connected with the second lead-out terminal with the first lead-out terminal.
The utility model provides a kind of generator failure detection instrument, its operational failure investigative range comprises: the fault finding of generator unit stator winding earth, generator rotor ground fault finding, turn-to-turn fault of generator rotor are surveyed, generator amature winding open fault is surveyed, can also, as the use of the detection of power cable short-term fault, can effectively improve the efficiency of generator failure investigation.
The accompanying drawing explanation
Accompanying drawing 1 is circuit theory diagrams of the present utility model;
Accompanying drawing 2 is the outside drawing that in the utility model, the hand-held electric current detects detector;
Accompanying drawing 3 is the schematic diagram that in the utility model, the hand-held electric current detects detector;
The schematic diagram that accompanying drawing 4 is the detection of generator unit stator winding earth fault in the utility model.
Embodiment
As shown in Figure 1, the utility model is a kind of generator failure detection instrument, comprise isolated voltage regulating device T, the input winding two ends of this isolated voltage regulating device T connect power supply by master switch K, and draw respectively the first adjustable lead-out terminal A and the second fixing lead-out terminal N on the output winding of this isolated voltage regulating device T, thereby the isolation industrial frequency AC signal of directly exporting 0-250V, 0-5A is as detectable signal.Also comprise the AC convertor B that is output as 0-600A, the output winding two ends (i.e. the first lead-out terminal A and the second lead-out terminal N) of the aforementioned isolated voltage regulating device of the input winding two termination T of this AC convertor B, and the output winding of this AC convertor B connects bridge rectifier circuit, thereby obtain DC current signal, as the generator rotor ground fault finding, use.
Wherein between the input winding of master switch K and isolated voltage regulating device T, also be provided with the self-locking switch circuit formed by relay and pushbutton switch, specifically comprise relay C, switch knob HN, opening button TN etc.Be parallel with voltage table in addition between the first lead-out terminal A and the second lead-out terminal N, and be in series with reometer between the output winding of the first lead-out terminal A and isolated voltage regulating device T.
Also comprise that the hand-held electric current detects detector, this hand-held electric current detects detector and comprises handle, and this handle is to be with chlamydate U-shaped iron core.Be equipped with on this handle between electromagnetic sensor and galvanometer and electromagnetic sensor and galvanometer and be electrically connected to.
Detection instrument of the present utility model comprises a control box, isolated voltage regulating device T inside is housed, the input end of this isolation pressure regulator is connected with power supply with self-locking switch circuit by master switch K, and the output terminal of this isolation pressure regulator is by selecting terminal to select to connect, can directly export 0-250V, 0-5A isolation industrial frequency AC signal, but pulse voltage, the magnitude of current of stable state output voltage amount and setting time.Energy Limited Current size during for protection test instrument and test, this detection instrument has also used small and exquisite reliable over-current protection relay IJ.This detection instrument can also be transformed on the current transformer of a 0-600A, the powerful bridge rectifier circuit of the current transformer of 0-600A process, the detection during for generator amature winding earth fault.
For the electric signal of launching, be convenient to observe and safety, this instrument has also used adjustable trigger CF of burst length, provides while carrying out the generator earth fault detection and triggers intermittently power supply, avoid generator failure point overheated, also be convenient to signal and observe.In order to make isolated voltage regulating device T guarantee to start in zero position, designed zero-bit and started blocking device, i.e. stroke switch XC.
Wherein also comprise the trigger CF and the trigger gauge tap K1 that are in series, after both series connection, be connected in parallel in self-locking switch circuit, and the output terminal of this trigger CF with also be connected in parallel in self-locking switch circuit after the coil of an auxiliary reclay YJ is connected, a pair of output contact of this auxiliary reclay YJ is connected in the second lead-out terminal N or the first lead-out terminal A in addition.
As shown in Figure 2,3, detection instrument of the present utility model also includes a hand-held electric current and detects detector, handle, electromagnetic sensor, galvanometer, consists of.Generator line rod is placed in the stator silicon steel sheet groove while manufacturing, and the span of two legs of electromagnetic induction element device in hand-held electric current detection detector designs according to the width of generator unit stator, rotor core groove.
Using method of the present utility model and principle of work are as follows:
1, the detection of generator unit stator winding earth fault:
As shown in Figure 4, when this generator failure detection instrument is used in the fault finding of generator unit stator winding earth, the second lead-out terminal N ground connection in output terminal, the first lead-out terminal A is connected on any one termination of generator stator ground fault phase.
Start master switch K and press switch knob HN, generator failure detection instrument power initiation, slowly regulate the handle of isolated voltage regulating device T, and electric current is risen to desirable value.Two iron core legs that expose outside with hand-held electric current detection detector (abbreviation detector), on the line rod groove at generator failure phase place, move to an other end along current input terminal.In the detector moving process, in the place that earth fault does not occur, detector can detect electric current, in the detector moving process, unexpected current vanishes, more back move, electric current detected again, move forward again, electric current has disappeared again, in the place of current vanishes, is exactly the place of generator generation earth fault, perform mark with marking pen, the line rod replacing of taking out this slot insulation infringement gets final product.
2, generator rotor interturn short-circuit fault finding:
When this generator failure detection instrument is used in the fault finding of generator amature winding inter-turn, the second lead-out terminal N, the first lead-out terminal A are connected on respectively on two slip rings of generator amature winding.
Start master switch K and press switch knob HN, generator failure detection instrument power initiation, slowly regulate the handle of isolated voltage regulating device T, and voltage is risen to 250 volts (or according to testing requirements regulation voltages).Two iron core legs that expose outside with detector are on the generator amature groove, each groove shunt opening side, stage casing and three positions of vapour side, read respectively induction current or magnitude of voltage, by that analogy, the value of all grooves is completed, fill in form, draw out induced voltage or the current characteristics curve of each groove, according to the degree of family curve analysis generator rotor generation turn-to-turn short circuit and the groove at place.
3, the detection of generator amature winding earth fault:
When this generator failure detection instrument is used in the fault finding of generator amature winding earth, "+", "-" the two poles of the earth in direct current bridge-type rectification circuit output end are connected on respectively the two ends of generator amature macro-axis metal part.
Start master switch K and press switch knob HN, generator failure detection instrument power initiation, slowly regulate the handle of isolated voltage regulating device T, and DC current is risen to 0-600A(or selects electric current according to generator capacity).With the galvanometer one on detector, terminate on the arbitrary slip ring of generator, it is laterally mobile on one side that the galvanometer other end is delayed rotor, Yi Bian read galvanometric value.The vertical section place, minimum value place that galvanometer records is exactly generator rotor ground vertical section place.And then "+", "-" the two poles of the earth in direct current bridge-type rectification output end are connected on respectively to generator amature macro-axis front face side to the minimum upper and lower metal part of vertical section of current potential.With the galvanometer on detector, along this section, being detected up and down, when a position of position minimum being detected, is exactly the generator rotor ground abort situation again.
Auxiliary reclay YJ in accompanying drawing 1, trigger CF, travel switch XC, the principle of work of trigger gauge tap K1 and using method explanation:
When closing trigger gauge tap K1, trigger CF starts working, the intermittent connection auxiliary reclay of the pair of output of trigger CF YJ, make the large volume output contactor gap conducting of auxiliary reclay YJ string in exchanging output loop, thereby the triggering that auxiliary reclay YJ is adjusted according to trigger CF is tested intermittently but regular connection output current.
In order to prevent that pressure regulator from closing power supply at an arbitrary position, the generator failure detection instrument has designed travel switch XC, as isolated voltage regulating device T zero-bit travel switch, the zero-bit travel switch has limited the combined floodgate condition of instrument, is exactly when isolated voltage regulating device T zero-bit, could to close a floodgate by the power switch of instrument.
Claims (8)
1. a generator failure detection instrument, it is characterized in that: comprise isolated voltage regulating device (T), the input winding two ends of this isolated voltage regulating device (T) connect power supply by master switch (K), and draw respectively the first lead-out terminal (A) and the second lead-out terminal (N) on the output winding of this isolated voltage regulating device (T), thereby the isolation industrial frequency AC signal of directly exporting 0-250V, 0-5A is as detectable signal; Also comprise AC convertor (B), the input winding of this AC convertor (B) connects the first lead-out terminal (A) and second lead-out terminal (N) of aforementioned isolated voltage regulating device (T), and the output winding of this AC convertor (B) connects bridge rectifier circuit, thereby obtain DC power signal, as the generator rotor ground fault finding, use.
2. generator failure detection instrument as claimed in claim 1, is characterized in that: wherein between the input winding of master switch (K) and isolated voltage regulating device (T), also be provided with the self-locking switch circuit be comprised of relay and pushbutton switch.
3. generator failure detection instrument as claimed in claim 2, it is characterized in that: wherein also comprise the trigger (CF) and the trigger gauge tap (K1) that are in series, after both series connection, be connected in parallel in self-locking switch circuit, and the output terminal of this trigger (CF) with also be connected in parallel in self-locking switch circuit after the coil of an auxiliary reclay (YJ) is connected, a pair of output contact of this auxiliary reclay (YJ) is connected in the second lead-out terminal (N) or the first lead-out terminal (A) in addition.
4. generator failure detection instrument as claimed in claim 1, it is characterized in that: wherein between the first lead-out terminal (A) and the second lead-out terminal (N), be parallel with voltage table, and be in series with reometer between the output winding of the first lead-out terminal (A) and isolated voltage regulating device (T).
5. generator failure detection instrument as claimed in claim 1, it is characterized in that: wherein AC convertor (B) is output as 0-600A.
6. generator failure detection instrument as described as any one in claim 1 to 5, it is characterized in that: wherein also comprise that the hand-held electric current detects detector, this hand-held electric current detects detector and comprises handle, is equipped with on this handle between electromagnetic sensor and galvanometer and electromagnetic sensor and galvanometer and is electrically connected to.
7. generator failure detection instrument as claimed in claim 6, it is characterized in that: wherein handle is to be with chlamydate U-shaped iron core.
8. generator failure detection instrument as described as any one in claim 1 to 5, it is characterized in that: wherein the output winding of isolated voltage regulating device (T) is connected with AC convertor (B) by the selection terminal, or is connected with the second lead-out terminal (N) with the first lead-out terminal (A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203526768U CN203324449U (en) | 2013-06-20 | 2013-06-20 | Electricity generator fault detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203526768U CN203324449U (en) | 2013-06-20 | 2013-06-20 | Electricity generator fault detecting device |
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| Publication Number | Publication Date |
|---|---|
| CN203324449U true CN203324449U (en) | 2013-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203526768U Expired - Fee Related CN203324449U (en) | 2013-06-20 | 2013-06-20 | Electricity generator fault detecting device |
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| CN (1) | CN203324449U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630837A (en) * | 2013-12-07 | 2014-03-12 | 大唐鸡西第二热电有限公司 | Generator rotor grounding detection circuit |
| CN105004992A (en) * | 2015-02-06 | 2015-10-28 | 国电科学技术研究院银川电力技术分院 | Multifunctional fault detector for electrical devices |
| CN105277845A (en) * | 2015-09-24 | 2016-01-27 | 武汉三新电力设备制造有限公司 | Generator stator winding earth fault exact location instrument |
| US20160025811A1 (en) * | 2014-07-24 | 2016-01-28 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for monitoring and protecting an electric power generator |
| US10333291B2 (en) | 2017-09-25 | 2019-06-25 | Schweitzer Engineering Laboratories, Inc. | Multiple generator ground fault detection |
| US10797632B2 (en) | 2018-08-21 | 2020-10-06 | Schweitzer Engineering Laboratories, Inc. | Sensitive directional element for generator protection |
| US10819261B1 (en) | 2019-10-25 | 2020-10-27 | Schweitzer Engineering Laboratories, Inc. | Security improvements for electric power generator protection |
| US10931097B2 (en) | 2017-09-25 | 2021-02-23 | Schweitzer Engineering Laboratories, Inc. | Generator stator ground protection using third harmonic |
| US11946966B1 (en) | 2023-02-20 | 2024-04-02 | Schweitzer Engineering Laboratories, Inc. | Selective stator ground fault protection using positive-sequence voltage reference |
-
2013
- 2013-06-20 CN CN2013203526768U patent/CN203324449U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103630837A (en) * | 2013-12-07 | 2014-03-12 | 大唐鸡西第二热电有限公司 | Generator rotor grounding detection circuit |
| CN103630837B (en) * | 2013-12-07 | 2017-01-04 | 大唐鸡西第二热电有限公司 | Generator rotor ground testing circuit |
| US20160025811A1 (en) * | 2014-07-24 | 2016-01-28 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for monitoring and protecting an electric power generator |
| US10288688B2 (en) * | 2014-07-24 | 2019-05-14 | Schweitzer Engineering Laboratories, Inc. | Systems and methods for monitoring and protecting an electric power generator |
| CN105004992A (en) * | 2015-02-06 | 2015-10-28 | 国电科学技术研究院银川电力技术分院 | Multifunctional fault detector for electrical devices |
| CN105277845A (en) * | 2015-09-24 | 2016-01-27 | 武汉三新电力设备制造有限公司 | Generator stator winding earth fault exact location instrument |
| US10333291B2 (en) | 2017-09-25 | 2019-06-25 | Schweitzer Engineering Laboratories, Inc. | Multiple generator ground fault detection |
| US10931097B2 (en) | 2017-09-25 | 2021-02-23 | Schweitzer Engineering Laboratories, Inc. | Generator stator ground protection using third harmonic |
| US10797632B2 (en) | 2018-08-21 | 2020-10-06 | Schweitzer Engineering Laboratories, Inc. | Sensitive directional element for generator protection |
| US10819261B1 (en) | 2019-10-25 | 2020-10-27 | Schweitzer Engineering Laboratories, Inc. | Security improvements for electric power generator protection |
| US11946966B1 (en) | 2023-02-20 | 2024-04-02 | Schweitzer Engineering Laboratories, Inc. | Selective stator ground fault protection using positive-sequence voltage reference |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20190620 |