CN203432994U - Phase sequence conversion device of three-phase alternating current tester - Google Patents
Phase sequence conversion device of three-phase alternating current tester Download PDFInfo
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- CN203432994U CN203432994U CN201320251028.3U CN201320251028U CN203432994U CN 203432994 U CN203432994 U CN 203432994U CN 201320251028 U CN201320251028 U CN 201320251028U CN 203432994 U CN203432994 U CN 203432994U
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- 238000000819 phase cycle Methods 0.000 title claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 title abstract description 9
- 238000012360 testing method Methods 0.000 claims description 23
- 230000001681 protective effect Effects 0.000 claims description 13
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
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Abstract
A phase sequence conversion device of a three-phase alternating current tester is provided. The phase sequence conversion device of the three-phase alternating current tester comprises the alternating current tester; three-phase voltage or current output of the alternating current tester is connected with a change-over switch with different gear auxiliary contacts; the output of the switch is connected with a relay protection device; the output of the three-phase alternating current tester is constantly in an A-B-C phase sequence; and the change-over switch switches the A-B-C phase sequence to phase sequences at least comprising a C-A-B phase sequence and a B-C-A phase sequence through the switching on and switching off of the different gear auxiliary contacts, and is connected with the relay protection device. The phase sequence conversion device has the advantages of high reliability, being free of maintenance, and wide application range, capabilities of realizing fast conversion of phase sequences, greatly shortening debugging time and improving work efficiency, suitability for the output of various kinds of three-phase alternating current testers, great universality and the like.
Description
Technical field
The utility model relates to a kind of device that the output three-phase alternating voltage of test instrument, electric current phase sequence can be changed, applicable to fields such as electric system, robotizations.
Background technology
At present, when power system relay protection device is debugged, for reaching the object of the various separate physical faults of simulation, testing crew need to be to protective relaying device each phase or the alternate fault simulation of carrying out.Yet for same segment protect, different phases or alternate fault amount are identical, testing crew must reach the object that changes phase sequence by manual change setting; This method efficiency is very low, wastes a large amount of time, and more gets half the result with twice the effort running into when situation about makeing mistakes is set.
Utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, and a kind of debug time that can greatly shorten is provided, and improves commissioning staff's work efficiency, can carry out the phase-sequence changed device of the three-phase alternating current test instrument of quick phase sequence switching.
The purpose of this utility model completes by following technical solution; it comprises an ac test instrument; the three-phase voltage of described ac test instrument or electric current output are connected in a change-over switch with different gear auxiliary contacts, and the output of this change-over switch is connected to protective relaying device.
Described three-phase alternating current test instrument output is fixed as A-B-C phase sequence, after the break-make of described change-over switch by different gear auxiliary contacts, A-B-C phase sequence is switched to and at least comprises C-A-B, B-C-A phase sequence and be connected to protective relaying device.
The utility model compared with prior art, has following characteristics:
1. the utility model adopts traditional switching handle, realizes simply, and reliability is high, non-maintaining, applied widely, can be used in the switching of voltage, electric current.
2. the utility model can be realized the quick conversion to phase sequence, has greatly shortened debug time, has improved work efficiency.
3, the utility model is applicable to the output of various three-phase alternating current test instruments, has good versatility.
Accompanying drawing explanation
Fig. 1 is application structure schematic diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 1,2; the utility model comprises an ac test instrument 1; the three-phase voltage of described ac test instrument 1 or electric current output are connected in a change-over switch 2 with different gear auxiliary contacts, and the output of this change-over switch 2 is connected to protective relaying device 3.
Described three-phase alternating current test instrument 1 output is fixed as A-B-C phase sequence, after the break-make of described change-over switch 2 by different gear auxiliary contacts, A-B-C phase sequence is switched to and at least comprises C-A-B, B-C-A phase sequence and be connected to protective relaying device 3.
The utility model is realized by the break-make of the different gear auxiliary contacts of change-over switch.The three-phase voltage of ac test instrument or electric current output are connected to change-over switch, and change-over switch output is connected to protective relaying device.The different gears of change-over switch can be realized the conversion of phase sequence; the output of three-phase alternating current test instrument is fixed as A-B-C order; after switching, can be exchanged into C-A-B, B-C-A etc., so which phase fault no matter protective relaying device need to simulate, and only need can realize fast by change-over switch.
Embodiment
The present embodiment take that to debug a set of 110kV circuit relay protection device be example, and to adopting the utility model and not adopting two kinds of methods to compare, service time is as following table:
It is foundation that above example be take typical case's section of protection fixed value checking; debugging for other sophisticated functions of protective device; such as broken voltage line overcurrent protection, distance and zero sequence after accelerated protection etc.; need a plurality of status switches to coordinate debugging, at this moment the superiority of the utility model phase-sequence changed device in debugging is able to sufficient embodiment especially.
Shown in Fig. 1; phase-sequence changed device described in the utility model is connected in three-phase alternating current test instrument and protective relaying device etc. by testing equipment; the three-phase voltage of three-phase alternating current test instrument output and sequence of currents are fixed as A-B-C order; after phase sequence conversion, the phase sequence that protective relaying device is experienced is respectively: A-B-C(gear 1), C-A-B(gear 2), B-C-A(gear 3).If three-phase alternating current test instrument arranges fault phase at A phase time, the fault phase that protective relaying device is experienced is respectively: A phase (gear 1), B phase (gear 2), C phase (gear 3).
The circuit theory wiring diagram of the utility model phase-sequence changed device is as Fig. 2.By gear switch, can realize the break-make of different auxiliary contacts, realize the switching of different separate, finally realize the conversion of phase sequence.
Claims (2)
1. the phase-sequence changed device of a three-phase alternating current test instrument; it comprises an ac test instrument; the three-phase voltage or the electric current output that it is characterized in that described ac test instrument are connected in a change-over switch with different gear auxiliary contacts, and the output of this change-over switch is connected to protective relaying device.
2. the phase-sequence changed device of three-phase alternating current test instrument according to claim 1; it is characterized in that described three-phase alternating current test instrument output is fixed as A-B-C phase sequence; after the break-make of described change-over switch by different gear auxiliary contacts, A-B-C phase sequence is switched to and at least comprises C-A-B, B-C-A phase sequence and be connected to protective relaying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320251028.3U CN203432994U (en) | 2013-05-08 | 2013-05-08 | Phase sequence conversion device of three-phase alternating current tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320251028.3U CN203432994U (en) | 2013-05-08 | 2013-05-08 | Phase sequence conversion device of three-phase alternating current tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203432994U true CN203432994U (en) | 2014-02-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320251028.3U Expired - Fee Related CN203432994U (en) | 2013-05-08 | 2013-05-08 | Phase sequence conversion device of three-phase alternating current tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203432994U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308727A (en) * | 2013-05-08 | 2013-09-18 | 嘉兴电力局 | Phase sequence switching device of three-phase alternating current tester |
| CN107910715A (en) * | 2017-06-19 | 2018-04-13 | 国网浙江省电力公司湖州供电公司 | A kind of thread-changing formula terminal box |
| CN109270315A (en) * | 2018-10-31 | 2019-01-25 | 国网四川省电力公司广元供电公司 | Two-phase inlet-outlet line polarity does not have a power failure commutation circuit |
-
2013
- 2013-05-08 CN CN201320251028.3U patent/CN203432994U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308727A (en) * | 2013-05-08 | 2013-09-18 | 嘉兴电力局 | Phase sequence switching device of three-phase alternating current tester |
| CN107910715A (en) * | 2017-06-19 | 2018-04-13 | 国网浙江省电力公司湖州供电公司 | A kind of thread-changing formula terminal box |
| CN109270315A (en) * | 2018-10-31 | 2019-01-25 | 国网四川省电力公司广元供电公司 | Two-phase inlet-outlet line polarity does not have a power failure commutation circuit |
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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: 20140212 Termination date: 20200508 |