CN102087315A - Uninterrupted-power test method for insulation resistance of 330 kV metal zinc oxide arrester - Google Patents
Uninterrupted-power test method for insulation resistance of 330 kV metal zinc oxide arrester Download PDFInfo
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- CN102087315A CN102087315A CN 201110009234 CN201110009234A CN102087315A CN 102087315 A CN102087315 A CN 102087315A CN 201110009234 CN201110009234 CN 201110009234 CN 201110009234 A CN201110009234 A CN 201110009234A CN 102087315 A CN102087315 A CN 102087315A
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- China
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- zinc oxide
- metal zinc
- insulation resistance
- lightning arrester
- megohmmeter
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Abstract
The invention discloses an uninterrupted-power test method for insulation resistance of a 330 kV metal zinc oxide arrester. The method comprises the following steps: disconnecting the next section of metal zinc oxide arrester and a counter; connecting an L line of a megger to the joint between the previous section of metal zinc oxide arrester and the next section of metal zinc oxide arrester; grounding an E line of the megger and driving the megger, wherein when the indication of the megger is stable, the reading of the megger is the insulation resistance of the previous section of metal zinc oxide arrester; connecting the E line of the megger with the lower end of the next section of metal zinc oxide arrester, and then driving the megger, wherein after the indication of the megger is stable, the reading of the megger is the insulation resistance of the next section of metal zinc oxide arrester. Through the test method for the insulation resistance of the metal zinc oxide arrester disclosed by the invention, the insulation resistance test can be performed simply by opening the grounding of the counter; the bus grounding point does not need to be opened or the previous section of lead does not need to be removed in the test process, thereby simplifying the test process and saving time and labor; and meanwhile, as high-altitude operation time is reduced, the operation danger is remarkably reduced.
Description
Technical field
The invention belongs to metal zinc oxide lightning arrester method of testing technical field, be specifically related to a kind of uninterrupted power test method of 330KV metal zinc oxide lightning arrester insulation resistance.
Background technology
Metal zinc oxide lightning arrester (MOA) is the major equipment that electric system prevents thunder and lightning, switching overvoltage, for guaranteeing the safe operation of metal Zinc-Oxide Arrester, need regularly to carry out charged and have a power failure test to the metal zinc oxide lightning arrester, for example, annual according to electrical test equipment period defining 330KV metal zinc oxide lightning arrester live testing, the test that has a power failure is every two years carried out once.According to " state's net power transmission and transformation equipment state overhauling rules " regulation, 330KV metal zinc oxide lightning arrester routine has a power failure and should carry out the insulation resistance test of every joint metal zinc oxide lightning arrester.
When the work on the spot of 330KV metal zinc oxide lightning arrester, every is to be composed in series by single metal zinc oxide lightning arrester of upper and lower two joints mutually, last joint metal zinc oxide lightning arrester directly is connected with bus YH or directly is connected with circuit, and circuit or the direct ground connection of bus YH, the lower end of saving the metal zinc oxide lightning arrester down is connected with counter, counter ground connection.
Existing power failure testing requirements metal zinc oxide lightning arrester and miscellaneous equipment break away from, this has come many inconvenience just for regular test tape, during as joint test on carrying out 330KV metal zinc oxide lightning arrester, it to be removed with the lead-in wire that is connected of equipment, because the metal zinc oxide lightning arrester is higher apart from ground, and connected lead-in wire cross section is thicker, it is big to cause removing the lead-in wire working strength, waste time and energy, job schedule is slow, and the required working time is long, and the induced voltage of 330KV metal zinc oxide lightning arrester system is stronger simultaneously, induced electricity fiber crops electrical phenomena takes place in staff easily when work, and the staff is had certain danger.
Summary of the invention
The technical problem to be solved in the present invention is: the shortcoming that exists at prior art is with not enough, the invention discloses a kind of easy, save time the uninterrupted power test method of the 330KV metal zinc oxide lightning arrester insulation resistance of strong operability and safety.
At above-mentioned technical matters, the present invention proposes following technical scheme.
The uninterrupted power test method of 330KV metal zinc oxide lightning arrester insulation resistance may further comprise the steps:
(1) will save metal zinc oxide lightning arrester and counter down and disconnect, the L line of megohmmeter will be connected to the junction of upper and lower joint metal zinc oxide lightning arrester;
(2) with the E line ground connection of megohmmeter, drive megohmmeter then, the reading after the megohmmeter indication is stable is the insulation resistance of joint metal zinc oxide lightning arrester;
(3) go up the determination of insulation resistance of joint metal zinc oxide lightning arrester after, the E line of megohmmeter is connected with the lower end of joint metal zinc oxide lightning arrester down, drive megohmmeter then, the reading after the megohmmeter indication is stablized is down the insulation resistance that saves the metal zinc oxide lightning arrester.
Described megohmmeter is the 2500V megohmmeter.
Beneficial effect of the present invention is embodied in: the uninterrupted power test method of 330KV metal zinc oxide lightning arrester insulation resistance of the present invention only needs the ground connection of the counter of metal zinc oxide lightning arrester is opened, just can carry out megger test, because busbar grounding point is motionless, test process need not upward joint lead-in wire is opened or removed to circuit or busbar grounding point, simplified test procedure, the time and labour saving owing to reduced the time of work high above the ground, greatly reduces operation danger simultaneously.
Description of drawings
Fig. 1 is the connection diagram of megohmmeter and last joint metal zinc oxide lightning arrester;
Fig. 2 is megohmmeter and the connection diagram that saves the metal zinc oxide lightning arrester down.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing.
Referring to Fig. 1, Fig. 2, the uninterrupted power test method of 330KV metal zinc oxide lightning arrester insulation resistance may further comprise the steps:
(1) will save metal zinc oxide lightning arrester and counter down and disconnect, the L line of 2500V megohmmeter will be connected to the junction of upper and lower joint metal zinc oxide lightning arrester;
(2) with the E line ground connection of 2500V megohmmeter, busbar grounding point is motionless, drive the 2500V megohmmeter then, electric current flows into the earth by last joint metal zinc oxide arrester valve piece made, constitute the loop with 2500V megohmmeter ground connection, the reading after the indication of 2500V megohmmeter is stable is the insulation resistance of joint metal zinc oxide lightning arrester;
(3) behind the determination of insulation resistance of last joint metal zinc oxide lightning arrester, the E line of 2500V megohmmeter is connected with the lower end of saving the metal zinc oxide lightning arrester down, busbar grounding point is motionless, drive the 2500V megohmmeter then, electric current is by saving the metal zinc oxide arrester valve piece made down, constitute the loop with 2500V megohmmeter E end, the reading after the indication of 2500V megohmmeter is stable is down the insulation resistance of joint metal zinc oxide lightning arrester.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of being submitted to.
Claims (2)
1.330KV the uninterrupted power test method of metal zinc oxide lightning arrester insulation resistance is characterized in that may further comprise the steps:
(1) will save metal zinc oxide lightning arrester and counter down and disconnect, the L line of megohmmeter will be connected to the junction of upper and lower joint metal zinc oxide lightning arrester;
(2) with the E line ground connection of megohmmeter, drive megohmmeter then, the reading after the megohmmeter indication is stable is the insulation resistance of joint metal zinc oxide lightning arrester;
(3) go up the determination of insulation resistance of joint metal zinc oxide lightning arrester after, the E line of megohmmeter is connected with the lower end of joint metal zinc oxide lightning arrester down, drive megohmmeter then, the reading after the megohmmeter indication is stablized is down the insulation resistance that saves the metal zinc oxide lightning arrester.
2. according to the uninterrupted power test method of the described 330KV metal zinc oxide of claim 1 lightning arrester insulation resistance, it is characterized in that: described megohmmeter is the 2500V megohmmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110009234 CN102087315A (en) | 2011-01-18 | 2011-01-18 | Uninterrupted-power test method for insulation resistance of 330 kV metal zinc oxide arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110009234 CN102087315A (en) | 2011-01-18 | 2011-01-18 | Uninterrupted-power test method for insulation resistance of 330 kV metal zinc oxide arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102087315A true CN102087315A (en) | 2011-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110009234 Pending CN102087315A (en) | 2011-01-18 | 2011-01-18 | Uninterrupted-power test method for insulation resistance of 330 kV metal zinc oxide arrester |
Country Status (1)
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| CN (1) | CN102087315A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267260A (en) * | 2014-10-20 | 2015-01-07 | 国家电网公司 | 110 kV combined type zinc oxide lightning arrester preventive test method without dismantling high voltage lead |
| CN104950178A (en) * | 2015-06-29 | 2015-09-30 | 国网天津市电力公司 | Method for testing external insulation resistance of zinc oxide arrester from middle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246196A (en) * | 2008-03-24 | 2008-08-20 | 江苏省电力公司南京供电公司 | Double-segment zinc oxide lightning arrester insulation status testing method |
| CN101354418A (en) * | 2008-09-22 | 2009-01-28 | 河南省电力公司商丘供电公司 | Power transformer test method without disconnecting wire |
-
2011
- 2011-01-18 CN CN 201110009234 patent/CN102087315A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246196A (en) * | 2008-03-24 | 2008-08-20 | 江苏省电力公司南京供电公司 | Double-segment zinc oxide lightning arrester insulation status testing method |
| CN101354418A (en) * | 2008-09-22 | 2009-01-28 | 河南省电力公司商丘供电公司 | Power transformer test method without disconnecting wire |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104267260A (en) * | 2014-10-20 | 2015-01-07 | 国家电网公司 | 110 kV combined type zinc oxide lightning arrester preventive test method without dismantling high voltage lead |
| CN104950178A (en) * | 2015-06-29 | 2015-09-30 | 国网天津市电力公司 | Method for testing external insulation resistance of zinc oxide arrester from middle |
| CN104950178B (en) * | 2015-06-29 | 2018-11-20 | 国网天津市电力公司 | A kind of Zinc-Oxide Arrester external insulation resistance centre test method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110608 |