CN201666902U - High-voltage line parameter testing and protecting device - Google Patents
High-voltage line parameter testing and protecting device Download PDFInfo
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- CN201666902U CN201666902U CN2010201434838U CN201020143483U CN201666902U CN 201666902 U CN201666902 U CN 201666902U CN 2010201434838 U CN2010201434838 U CN 2010201434838U CN 201020143483 U CN201020143483 U CN 201020143483U CN 201666902 U CN201666902 U CN 201666902U
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Abstract
The utility model relates to a safety protecting device in the field of high-voltage line detection, in particular to a high-voltage line parameter testing and protecting device. The device comprises a shifting switch arranged between a high-voltage line to be tested and a high-voltage line parameter testing device; the shifting switch is provided with an input terminal, an output terminal and a grounding terminal, wherein the shifting switch is a three-phase double-throw knife switch; the input terminal of the shifting switch comprises a current input terminal and a voltage input terminal and is connected with a middle connecting terminal of the three-phase double-throw knife switch; the output terminal of the shifting switch comprises a current output terminal and a voltage output terminal; by additionally arranging the protecting device between the high-voltage line to be tested and the high-voltage line parameter testing device, during the shifting process of the wiring mode, the knife switch is firstly utilized, so that the high-voltage line to be tested is grounded, thus effectively eliminating the induction voltage and induction current on the tested line, thereby protecting the safety of testing operators and the testing equipment.
Description
Technical field
The utility model relates to a kind of safety guard in the high-tension line checkout equipment, specifically a kind of high-tension line parameter testing protective device.
Background technology
Newly-built and the reconstruction ultra-high-tension power transmission line before coming into operation; except checking the line insulation situation, checking the phase place; also should measure various power frequency parameter values; with actual foundation as work such as computing system short-circuit current, relay protection setting and the reasonable methods of operation, and the expection that can whether reach design so as to the commutation effect and the reactive-load compensation of checking long transmission line.
Present high-tension line parameter test method mainly contains two kinds, a kind of comparatively original be to adopt the combination of pointer table meter; Another kind of comparatively advanced person's is to adopt special high-tension line parameter tester.Also exist a big safety problem to be exactly in a kind of method of testing in back, the safety practice of high-tension line parameter tester is not very well.Be mainly reflected in: need gather a plurality of parameters such as electric current, voltage, inductance during high-tension line parameter to be determined, so need switch to the mode of connection of high-tension line parameter tester.In the process of switching,, can bring great hidden danger to the safety of tester and dependence test equipment owing to have very high induced voltage, very big induction current on the measurement circuit.
The utility model content
The purpose of this utility model is to provide a kind of high-tension line parameter testing protective device, can effectively eliminate induced voltage, induction current on the measurement circuit, avoids unnecessary danger.
The technical scheme in the invention for solving the technical problem is: this kind high-tension line parameter testing protective device; it is characterized in that; comprise the change-over switch that is arranged between tested high-tension line and the high-tension line parameter test device, input terminal, lead-out terminal and ground terminal are arranged on the described change-over switch.
Described change-over switch is a three-phase double-throw disconnecting link, and the input terminal of described change-over switch is divided into current input terminal and voltage input end, is connected to the indirect terminal of three-phase double-throw disconnecting link, is used for being connected with tested high-tension line; The lead-out terminal of described change-over switch comprises current output terminal and voltage output end, is used for being connected with the high-tension line parameter test device.
The beneficial effects of the utility model are: by set up protective device between tested high-tension line and high-tension line parameter test device; in the process that the mode of connection in the high-tension line parameter test device is switched; at first utilize disconnecting link to make tested high-tension line ground connection; can effectively eliminate induced voltage, induction current on the measurement circuit, be used to protect the safety of tester and testing apparatus.
Description of drawings
Fig. 1 is a connection block diagram of the present utility model;
A-A ' among the figure, B-B ', C-C ' represents high-tension line.
Embodiment
As shown in Figure 1; high-tension line parameter testing protective device; comprise the change-over switch that is arranged between tested high-tension line and the high-tension line parameter test device and lay the box of change-over switch; this change-over switch is three-phase double-throw disconnecting link (disconnecting link also is cutter formula on-load switch, has good arc extinguishing ability).On the described three-phase double-throw disconnecting link input terminal, lead-out terminal and ground terminal are arranged.
The input terminal of described three-phase double-throw disconnecting link is connected to the binding post of the centre of three-phase double-throw disconnecting link, and the input terminal of this disconnecting link comprises that (I3) (U1, U2 U3), are used for being connected with tested high-tension line current input terminal with voltage input end for I1, I2.The lead-out terminal of this three-phase double-throw disconnecting link comprise current output terminal (I4, I5, I6) and voltage output end (U4, U5 U6), are used for and being connected of high-tension line parameter test device.The lead-out terminal of this three-phase double-throw disconnecting link and ground terminal are respectively on the binding post of the both sides of three-phase double-throw disconnecting link.By closing and descend to close two kinds of duties of two kinds of circuits of action formation on the disconnecting link.
High-tension line parameter test device in this system connects experiment power supply simultaneously, provides test with adding trial voltage, electric current by experiment power supply.
This high-tension line parameter testing protective device has two kinds of duties, and the one, the line test closure state, disconnecting link was in and closed station this moment; Another kind is the ground protection state, and this moment, disconnecting link closed station under being in.When being in the line test closure state, current input terminal (I1, the I2 of disconnecting link, I3) and voltage input end (U1, U2, U3), current output terminal (the I4 of the corresponding disconnecting link of difference, I5 is I6) with voltage output end (U4, U5, U6), constitute I1 to I4, I2 is to I5 ... U3 is to the corresponding one by one conducting relation of U6, and this moment, disconnecting link was equivalent to lead; When being in the ground protection state, (I3) (U1, U2 U3), are connected with the earth current input terminal of disconnecting link, are used to eliminate induced voltage or induction current with voltage input end for I1, I2.
Use step of the present utility model is:
(a) be under the ground protection state at disconnecting link, reliable the connection and ground connection between experiment power supply, high-tension line parameter test device and the high-tension line parameter testing protective device;
When (b) tested high-tension line being carried out applied voltage test, should make high-tension line parameter testing protective device be in the line test closure state, can't normally export to prevent power supply short circuit.
(c) finish once the sampling experiment after; high-tension line parameter testing protective device should be switched to the ground protection state; output terminal in the high-tension line parameter test device is changed the mode of connection; after finishing; again high-tension line parameter testing protective device is switched to the test closure state, carry out the sampling of parameter for the second time.By that analogy, carry out repeatedly the sampling of parameter, until finishing the work.
(d) after test mission is finished; high-tension line parameter testing protective device should be switched to the ground protection state; remove the line between experiment power supply, high-tension line parameter test device and the high-tension line parameter testing protective device then, remove the tested hi-line on the tested high-tension line at last.
To sum up state institute; in the process of using; the using priciple of high-tension line parameter testing protective device is: in the process of switching the high-tension line parameter test device mode of connection; should guarantee that tested high-tension line has earth point all the time; make high-tension line not connect the voltage terminal of high-tension line parameter test device separately, in order to avoid burn out the high-tension line parameter test device.
Except that the described technical characterictic of instructions, be the known technology of those skilled in the art.
Claims (2)
1. a high-tension line parameter testing protective device is characterized in that, comprises the change-over switch that is arranged between tested high-tension line and the high-tension line parameter test device, and input terminal, lead-out terminal and ground terminal are arranged on the described change-over switch.
2. high-tension line parameter testing protective device according to claim 1, it is characterized in that, described change-over switch is a three-phase double-throw disconnecting link, the input terminal of described change-over switch is divided into current input terminal and voltage input end, be connected to the indirect terminal of three-phase double-throw disconnecting link, be used for being connected with tested high-tension line; The lead-out terminal of described change-over switch comprises current output terminal and voltage output end, is used for being connected with the high-tension line parameter test device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201434838U CN201666902U (en) | 2010-03-29 | 2010-03-29 | High-voltage line parameter testing and protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201434838U CN201666902U (en) | 2010-03-29 | 2010-03-29 | High-voltage line parameter testing and protecting device |
Publications (1)
| Publication Number | Publication Date |
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| CN201666902U true CN201666902U (en) | 2010-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010201434838U Expired - Fee Related CN201666902U (en) | 2010-03-29 | 2010-03-29 | High-voltage line parameter testing and protecting device |
Country Status (1)
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| CN (1) | CN201666902U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495247A (en) * | 2011-12-26 | 2012-06-13 | 安徽省电力公司阜阳供电公司 | Electrical parameter test lead connection method and device for power line |
| CN103033654A (en) * | 2012-12-21 | 2013-04-10 | 无锡友达电子有限公司 | Protection device used for alternating current test system |
| CN106501558A (en) * | 2016-09-22 | 2017-03-15 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of safe mode of connection during electric power transmission line parameter testing |
| CN106680605A (en) * | 2015-11-05 | 2017-05-17 | 国网辽宁省电力有限公司本溪供电公司 | Method of eliminating induced electricity in test line parameters |
| CN110346611A (en) * | 2019-08-15 | 2019-10-18 | 淄博齐林电力工程有限公司 | Transmission line parameter test remote control earthing switch |
| CN110441554A (en) * | 2019-07-18 | 2019-11-12 | 国网安徽省电力有限公司宣城供电公司 | A kind of transmission line power frequency parameter test auxiliary device of anti-induced electrical |
| CN114809878A (en) * | 2022-03-10 | 2022-07-29 | 云南电网有限责任公司电力科学研究院 | Safety switch door for transformer short circuit test platform |
-
2010
- 2010-03-29 CN CN2010201434838U patent/CN201666902U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495247A (en) * | 2011-12-26 | 2012-06-13 | 安徽省电力公司阜阳供电公司 | Electrical parameter test lead connection method and device for power line |
| CN103033654A (en) * | 2012-12-21 | 2013-04-10 | 无锡友达电子有限公司 | Protection device used for alternating current test system |
| CN106680605A (en) * | 2015-11-05 | 2017-05-17 | 国网辽宁省电力有限公司本溪供电公司 | Method of eliminating induced electricity in test line parameters |
| CN106501558A (en) * | 2016-09-22 | 2017-03-15 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of safe mode of connection during electric power transmission line parameter testing |
| CN110441554A (en) * | 2019-07-18 | 2019-11-12 | 国网安徽省电力有限公司宣城供电公司 | A kind of transmission line power frequency parameter test auxiliary device of anti-induced electrical |
| CN110441554B (en) * | 2019-07-18 | 2024-05-14 | 国网安徽省电力有限公司宣城供电公司 | Power transmission line power frequency parameter test auxiliary device capable of preventing induction electricity |
| CN110346611A (en) * | 2019-08-15 | 2019-10-18 | 淄博齐林电力工程有限公司 | Transmission line parameter test remote control earthing switch |
| CN114809878A (en) * | 2022-03-10 | 2022-07-29 | 云南电网有限责任公司电力科学研究院 | Safety switch door for transformer short circuit test platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20140329 |