CN105717364A - Method for measuring power frequency grounding resistance of single ground wire iron pipe tower - Google Patents
Method for measuring power frequency grounding resistance of single ground wire iron pipe tower Download PDFInfo
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- CN105717364A CN105717364A CN201410712189.7A CN201410712189A CN105717364A CN 105717364 A CN105717364 A CN 105717364A CN 201410712189 A CN201410712189 A CN 201410712189A CN 105717364 A CN105717364 A CN 105717364A
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Abstract
The invention discloses a method for measuring the power frequency grounding resistance of a single ground wire iron pipe tower, which can greatly improve the test efficiency and the test accuracy, discover bad grounding in time and improve the lightning withstand level of equipment. The method comprises the following steps: (a) checking a ground electrode of the iron pipe tower, recording and timely processing abnormalities that a ground wire is damaged or a bolt is stolen and the like; (b) measuring the grounding resistance of the iron pipe tower using a clamp meter method without detaching the ground wire, checking whether ironware connecting bolts are loosed or in bad contact if the grounding resistance of the iron pipe tower is obviously increased relative to the grounding resistance of other surrounding tower and the conventional value of the iron pipe tower or exceeds the provision of the corresponding standard or regulation on the grounding resistance, re-measuring the grounding resistance after excluding, and executing step (c) if the grounding resistance is still increased or exceeds the standard; and (c) measuring the grounding resistance of the iron pipe tower using a three-pole method under the condition that the ground wire is disconnected from tower metal, checking whether the ground electrode is unqualified or the ground wire at the upper part of the tower is in bad contact and the like, judging the reason and making corresponding reformation.
Description
Technical field
The present invention relates to the measuring method of a kind of single lightning conducter iron pipe tower power frequency earthing resistance.
Background technology
At present, the commonly used three electrode method of iron pipe tower earthing test, workload is big, efficiency is low, and it is more that test result is subject to on-the-spot influence factor, it is difficult to ensure that the accuracy of test and promptness during actual motion is safeguarded.Although pincerlike meter method of testing is simple, but owing to iron pipe tower itself does not have independent down conductor, is unsuitable for the measurement of the earth resistance of iron pipe tower.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of accuracy being greatly improved testing efficiency and test, finds imperfect earth in time, improves the measuring method of single lightning conducter iron pipe tower power frequency earthing resistance of equipment resistance to thunder level.
The technical solution of the present invention is:
The measuring method of single lightning conducter iron pipe tower power frequency earthing resistance, its step is as follows:
A () iron pipe tower earthing pole checks
First check for the regulation of test line iron pipe tower whether coincidence measurement directive/guide DL/T475-2006, record lightning conducter model, shaft tower height, earthing pole pattern, shaft tower numbering, earthing pole numbering, soil regime and work as ground temperature, check the electrical connection situation of tested tower grounding line, as found have the abnormal conditions such as earth lead destroys or bolt is stolen then perform record and process in time；
B () uses the earth resistance of pincers meter method for measuring iron pipe tower under not tampering lightning conducter situation
Keeping iron pipe tower lightning conducter and tower body to connect motionless, upper tower uses pincerlike earth resistance tester to measure the earth resistance of iron pipe tower；
Open pincerlike earth resistance tester jaw during measurement, use tester to vise the gold utensil that tower top is connected with lightning conducter, make gold utensil line placed in the middle, it is perpendicular to tester jaw place plane as far as possible, and keep jaw contacts good, make tester work, read and record stable reading；
If it find that have iron pipe tower earth resistance and other towers of surrounding and the more apparent increase of the conventional numeric ratio of this tower in measurement, or exceed in corresponding standard or code the regulation to grounding resistance；Then check whether gold utensil connecting bolt loosens or loose contact, still increase if remeasured after eliminating or exceed standard, then perform step (c)；
C () is taken lightning conducter apart and is measured the earth resistance of iron pipe tower with use three electrode method under tower body metal connection
When carrying out safety measure, the gold utensil of lightning conducter Yu iron pipe tower is untied, use porcelain vase, insulation tube or insulating cord that with the insulation of iron pipe tower, lightning conducter is separated more than 5mm, lightning conducter can not be directly contacted with hands, when carrying out safety measure with insulating bar temporary support lightning conducter, then three electrode method is used to measure the earth resistance of iron pipe tower, check for that earthing pole is defective or the situation such as lightning conducter loose contact above tower, to judge its reason corresponding rectification.
The invention has the beneficial effects as follows: split-core type meter method is introduced the measurement of the earth resistance of single lightning conducter iron pipe tower of no ground line, split-core type meter method and three electrode method are effectively combined, it is greatly improved the accuracy of testing efficiency and test, finds imperfect earth in time, improve the resistance to thunder level of equipment.
Accompanying drawing explanation
The schematic diagram of the power frequency earthing resistance of meter method for measuring list lightning conducter iron pipe tower is clamped when Fig. 1 is not tamper lightning conducter；
When Fig. 2 is to remove lightning conducter, three electrode method measures the schematic diagram of the power frequency earthing resistance of single lightning conducter iron pipe tower；
In figure: P-voltage pole；C-electric current pole.
Detailed description of the invention
The measuring method of single lightning conducter iron pipe tower power frequency earthing resistance, its step is as follows:
A () iron pipe tower earthing pole checks
First check for the regulation of test line iron pipe tower whether coincidence measurement directive/guide DL/T475-2006, record lightning conducter model, shaft tower height, earthing pole pattern, shaft tower numbering, earthing pole numbering, soil regime and work as ground temperature, check the electrical connection situation of tested tower grounding line, as found have the abnormal conditions such as earth lead destroys or bolt is stolen then perform record and process in time；
B () uses the earth resistance of pincers meter method for measuring iron pipe tower under not tampering lightning conducter situation
As it is shown in figure 1, keep iron pipe tower lightning conducter and tower body to connect motionless, upper tower uses pincerlike earth resistance tester to measure the earth resistance of iron pipe tower；
Open pincerlike earth resistance tester jaw during measurement, use tester to vise the gold utensil that tower top is connected with lightning conducter, make gold utensil line placed in the middle, it is perpendicular to tester jaw place plane as far as possible, and keep jaw contacts good, make tester work, read and record stable reading.
If it find that have iron pipe tower earth resistance and other towers of surrounding and the more apparent increase of the conventional numeric ratio of this tower in measurement, or exceed the regulation to grounding resistance in corresponding standard or code, then check whether gold utensil connecting bolt loosens or loose contact, still increase if remeasured after eliminating or exceed standard, then perform step (c)；
C () is taken lightning conducter apart and is measured the earth resistance of iron pipe tower with use three electrode method under tower body metal connection
As shown in Figure 2, when carrying out safety measure, the gold utensil of lightning conducter Yu iron pipe tower is untied, use porcelain vase, insulation tube or insulating cord that with the insulation of iron pipe tower, lightning conducter is separated more than 5mm, lightning conducter can not be directly contacted with hands, the available insulating bar temporary support lightning conducter when carrying out safety measure, then three electrode method is used to measure the earth resistance of iron pipe tower by earth resistance tester, check for that earthing pole is defective or the situation such as lightning conducter loose contact above tower, to judge its reason corresponding rectification.
Claims (1)
1. the measuring method of single lightning conducter iron pipe tower power frequency earthing resistance, its step is as follows:
A () iron pipe tower earthing pole checks
First check for the regulation of test line iron pipe tower whether coincidence measurement directive/guide DL/T475-2006, record lightning conducter model, shaft tower height, earthing pole pattern, shaft tower numbering, earthing pole numbering, soil regime and work as ground temperature, check the electrical connection situation of tested tower grounding line, as found have the abnormal conditions such as earth lead destroys or bolt is stolen should perform record and process in time；
B () uses the earth resistance of pincers meter method for measuring iron pipe tower under not tampering lightning conducter situation
Keeping iron pipe tower lightning conducter and tower body to connect motionless, upper tower uses pincerlike earth resistance tester to measure the earth resistance of iron pipe tower；
Open pincerlike earth resistance tester jaw during measurement, use tester to vise the gold utensil that tower top is connected with lightning conducter, make gold utensil line placed in the middle, it is perpendicular to tester jaw place plane as far as possible, and keep jaw contacts good, make tester work, read and record stable reading；
If it find that have iron pipe tower earth resistance and other towers of surrounding and the more apparent increase of the conventional numeric ratio of this tower in measurement, or exceed in corresponding standard or code the regulation to grounding resistance；Then check whether gold utensil connecting bolt loosens or loose contact, still increase if remeasured after eliminating or exceed standard, then perform step (c)；
C () is taken lightning conducter apart and is measured the earth resistance of iron pipe tower with use three electrode method under tower body metal connection
When carrying out safety measure, the gold utensil of lightning conducter Yu iron pipe tower is untied, use porcelain vase, insulation tube or insulating cord that with the insulation of iron pipe tower, lightning conducter is separated more than 5mm, lightning conducter can not be directly contacted with hands, when carrying out safety measure with insulating bar temporary support lightning conducter, then three electrode method is used to measure the earth resistance of iron pipe tower, check for that earthing pole is defective or the situation of lightning conducter loose contact above tower, to judge its reason corresponding rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410712189.7A CN105717364B (en) | 2014-12-01 | 2014-12-01 | The measurement method of single lightning conducter iron pipe tower power frequency earthing resistance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410712189.7A CN105717364B (en) | 2014-12-01 | 2014-12-01 | The measurement method of single lightning conducter iron pipe tower power frequency earthing resistance |
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| CN105717364A true CN105717364A (en) | 2016-06-29 |
| CN105717364B CN105717364B (en) | 2019-05-31 |
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| CN201410712189.7A Active CN105717364B (en) | 2014-12-01 | 2014-12-01 | The measurement method of single lightning conducter iron pipe tower power frequency earthing resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239496A (en) * | 2020-04-10 | 2020-06-05 | 云南冶金资源股份有限公司 | Portable visual ground resistance measuring device |
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| JP2000028661A (en) * | 1998-07-07 | 2000-01-28 | Nippon Telegr & Teleph Corp <Ntt> | Grounding resistance measurement method and device thereof |
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
| CN101216515A (en) * | 2007-12-27 | 2008-07-09 | 武汉华瑞防雷科技股份有限公司 | Powerline pole tower ground resistance measurement method and its tester |
| CN203224571U (en) * | 2013-03-14 | 2013-10-02 | 辽宁省电力有限公司抚顺供电公司 | A flexible grounding resistance tester |
| CN102353843B (en) * | 2011-09-19 | 2013-11-13 | 清华大学 | Frequency sweeping test method for measuring power frequency ground resistance of grounding device and test instrument for frequency sweeping test method |
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2014
- 2014-12-01 CN CN201410712189.7A patent/CN105717364B/en active Active
Patent Citations (5)
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| JP2000028661A (en) * | 1998-07-07 | 2000-01-28 | Nippon Telegr & Teleph Corp <Ntt> | Grounding resistance measurement method and device thereof |
| CN1828313A (en) * | 2006-02-21 | 2006-09-06 | 武汉高压研究所 | Pole tower earthing resistance quick testing method without unfastening wire and device |
| CN101216515A (en) * | 2007-12-27 | 2008-07-09 | 武汉华瑞防雷科技股份有限公司 | Powerline pole tower ground resistance measurement method and its tester |
| CN102353843B (en) * | 2011-09-19 | 2013-11-13 | 清华大学 | Frequency sweeping test method for measuring power frequency ground resistance of grounding device and test instrument for frequency sweeping test method |
| CN203224571U (en) * | 2013-03-14 | 2013-10-02 | 辽宁省电力有限公司抚顺供电公司 | A flexible grounding resistance tester |
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| 李德超 等: "两种杆塔接地电阻测量方法的比较", 《电瓷避雷器》 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239496A (en) * | 2020-04-10 | 2020-06-05 | 云南冶金资源股份有限公司 | Portable visual ground resistance measuring device |
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