CN105445560A - Grounding resistor tester measurement method based on ZC-8 type - Google Patents

Grounding resistor tester measurement method based on ZC-8 type Download PDF

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Publication number
CN105445560A
CN105445560A CN201510843482.1A CN201510843482A CN105445560A CN 105445560 A CN105445560 A CN 105445560A CN 201510843482 A CN201510843482 A CN 201510843482A CN 105445560 A CN105445560 A CN 105445560A
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CN
China
Prior art keywords
zc
earth resistance
resistance tester
type earth
electrical equipment
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CN201510843482.1A
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Chinese (zh)
Inventor
彭卫东
闫胜瑜
彭子薇
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国家电网公司
国网河北省电力公司
国网河北省电力公司邢台供电分公司
国网河北巨鹿县供电有限责任公司
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Application filed by 国家电网公司, 国网河北省电力公司, 国网河北省电力公司邢台供电分公司, 国网河北巨鹿县供电有限责任公司 filed Critical 国家电网公司
Priority to CN201510843482.1A priority Critical patent/CN105445560A/en
Publication of CN105445560A publication Critical patent/CN105445560A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/20Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates

Abstract

The invention discloses a grounding resistor tester measurement method based on ZC-8 type, relating to the measurement method and the technology field of the grounding resistor. Through the reasonable winding up and paying off, the measurement steps are simplified, superposed or combined, which enables the measurement steps to be connected compactly and reasonably. The invention adopts the scientific and simple measurement step and the method; the measurement can be finished by one person, which reduces the number of staff, and the measurement time is halved, which is time-saving and labor-saving, and improves the working efficiency.

Description

A kind of measuring method based on ZC-8 type earth resistance tester

Technical field

The present invention relates to the measuring method technical field of stake resistance.

Background technology

In daily Operation of Electric Systems Maintenance and Repair checking and accepting, often measure with earth resistance tester (ZC-8) stake resistance to transformer, circuit, switch, equipment, lightning protection device, workload is large, dull to be repeated, intensity is high.

Traditional measuring method step is: after two staff hold earth resistance meter (hereinafter referred to as " table ") arrival transformer grounding pole place, take out survey instrument, one people's unwrapping wire, one people pulls strings away distally, voltage probe after wiring is inserted at 20M place, continue to pull strings and go ahead, current probe is inserted and wiring to 40M place, unwrapping wire people connects instrument terminated line and is connected with earthing pole afterwards, then survey record numerical value, wine-puller removes current probe, voltage probe, unwrapping wire people take-up and by instrument playback after end-of-job.This method needs use two people, and to transformer grounding pole, place starts working, people's unwrapping wire one people take-up, and accumulative each link used time is not less than 12.5 minutes.Traditional measuring method wastes time and energy, and measures efficiency low.

Summary of the invention

Technical matters to be solved by this invention is to provide a kind of measuring method based on ZC-8 type earth resistance tester, the measuring process that the science that the process employs is easy and method, measurement can be completed by one man operation, decrease staff, Measuring Time shortens half, economize people to save time, improve work efficiency.

For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of measuring method based on ZC-8 type earth resistance tester, is characterized in that: comprise the following steps:

1) ZC-8 type earth resistance tester and suitable current potential, electric current, earthing pole p-wire is prepared;

2) unwrapping wire: operating personnel hold the grounded part that earth resistance tester and above-mentioned p-wire go straight to tested electrical equipment, by the A point of stadia surveying apart from tested electrical equipment 40 meters, and insert current probe at A point place, operating personnel continue the grounded part going straight to tested electrical equipment along unwinding direction, by the B point of stadia surveying apart from tested electrical equipment 20 meters, and insert potential probes at B point place, then operating personnel continue the grounded part moving towards tested electrical equipment, and the earthing pole of ZC-8 type earth resistance tester is connected with the grounded part of tested electrical equipment,

3) earth resistance is carried out;

4) take-up: operating personnel simultaneously by current potential, testing current line along the direction take-up of unwrapping wire, potential probes is removed to during B point position by take-up, and current probe is removed to during A point position by take-up;

5) clean surveying instrument and playback, surveying work terminates.

The technical scheme of further optimization is that the earth resistance of described step 3) comprises the following steps:

Testing current line, potential test line are connected on current terminal and the potential end of ZC-8 type earth resistance tester by a;

ZC-8 type earth resistance tester is set level by b, and returns to zero;

Multiplying power switch is placed on maximum multiple by c, slow shake generator handle, rotation measuring dial simultaneously, making galvanometer pointer be on center, when examining flow index close to balance, accelerating shake generator handle, generator speed is made to reach rated speed 120r/min, and regulate measurement dial, make the stable finger of galvanometer pointer in center, namely can read the numerical value of stake resistance;

If the reading that d measures dial is less than 1 , multiplying power switch should be placed in less one grade, re-start measurement;

After e adjusts measurement parameter, carry out measuring and recording data;

F measures complete, is removed by the connecting line of each test end points on ZC-8 type earth resistance tester.

The technical scheme of further optimization is that the grounded part of tested electrical equipment and A point position, B point position are in same rectilinear direction.

The technical scheme of further optimization is the computing formula of the numerical value of the stake resistance in described step c) is that stake resistance resistance=multiplying power * measures dial reading.

The technical scheme of further optimization is described stadimeter is Hand-hold Distance Finder.

The beneficial effect adopting technique scheme to produce is: the present invention substitutes the step-by-step work pattern successively of tradition, adopts parallel-cross operation pattern, makes the compact and reasonable more that each measuring process connects, thus shorten the Measuring Time of whole work; Only need the line of staff folding and unfolding testing tool in the process of grounded part moving towards, leave tested electrical equipment, and plug test probe, complete grounding resistance measurement work, two relatively traditional people measure operation, reduce number of work, save manpower, parallel-cross operation is adopted to make a measuring process effectively superpose or combine, make whole measuring process more scientific and reasonable, shorten Measuring Time, improve work efficiency.

Accompanying drawing explanation

Fig. 1 is embodiment of the present invention measuring principle wiring diagram;

Fig. 2 is the AOA of embodiment of the present invention measuring method.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

As shown in Figure 1, the present invention is a kind of measuring method based on ZC-8 type earth resistance tester, comprises the following steps:

1) ZC-8 type earth resistance tester and suitable current potential, electric current, earthing pole p-wire is prepared;

2) unwrapping wire: operating personnel hold the grounded part that earth resistance tester and above-mentioned p-wire go straight to tested electrical equipment, by the A point of stadia surveying apart from tested electrical equipment 40 meters, and insert current probe at A point place, operating personnel continue the grounded part going straight to tested electrical equipment along unwinding direction, by the B point of stadia surveying apart from tested electrical equipment 20 meters, and insert potential probes at B point place, then operating personnel continue the grounded part moving towards tested electrical equipment, and the earthing pole of ZC-8 type earth resistance tester is connected with the grounded part of tested electrical equipment,

3) earth resistance is carried out;

4) take-up: operating personnel simultaneously by current potential, testing current line along the direction take-up of unwrapping wire, potential probes is removed to during B point position by take-up, and current probe is removed to during A point position by take-up;

5) clean surveying instrument and playback, surveying work terminates.

The technical scheme of further optimization is that the earth resistance of described step 3) comprises the following steps:

Testing current line, potential test line are connected on current terminal and the potential end of ZC-8 type earth resistance tester by a;

ZC-8 type earth resistance tester is set level by b, and returns to zero;

Multiplying power switch is placed on maximum multiple by c, slow shake generator handle, rotation measuring dial simultaneously, making galvanometer pointer be on center, when examining flow index close to balance, accelerating shake generator handle, generator speed is made to reach rated speed 120r/min, and regulate measurement dial, make the stable finger of galvanometer pointer in center, namely can read the numerical value of stake resistance;

If the reading that d measures dial is less than 1 , multiplying power switch should be placed in less one grade, re-start measurement;

After e adjusts measurement parameter, carry out measuring and recording data;

F measures complete, is removed by the connecting line of each test end points on ZC-8 type earth resistance tester.

The technical scheme of further optimization is that the grounded part of tested electrical equipment and A point position, B point position are in same rectilinear direction.

The technical scheme of further optimization is the computing formula of the numerical value of the stake resistance in described step c) is that stake resistance resistance=multiplying power * measures dial reading.

The technical scheme of further optimization is described stadimeter is Hand-hold Distance Finder.

Be below the specific embodiment of measuring transformer stake resistance:

After putting testing tool in order, staff moves towards to discharge current potential, testing current line in the process of transformer grounding pole by holding testing tool after being ready to, and 40,20M place inserts electric current, voltage probe and probe wiring and carries out simultaneously, after arriving transformer grounding pole place, instrument line, survey record data, remove instrument line, while returning to one's starting point a little, take-up while remove electric current and voltage probe, instrument playback end-of-job.This method only needs 1 people, and namely put in the process moving towards, leave transformer grounding pole and receive instrument OIR probe, the used time only needs within 5 minutes, both to have completed a transformer grounding resistance measurement job.

The measuring method that measuring method of the present invention is relatively traditional, grounding resistance measurement recruitment becomes 1 people from two original people, and Measuring Time was reduced to 5 minutes by 12.5 minutes, saves manpower 50%, increases work efficiency 60%, Be very effective.

The present invention substitutes the step-by-step work pattern successively of tradition, adopts parallel-cross operation pattern, makes the compact and reasonable more that each measuring process connects, thus shorten the Measuring Time of whole work; Only need the line of staff folding and unfolding testing tool in the process of grounded part moving towards, leave tested electrical equipment, and plug test probe, complete grounding resistance measurement work, two relatively traditional people measure operation, reduce number of work, save manpower, parallel-cross operation is adopted to make a measuring process effectively superpose or combine, make whole measuring process more scientific and reasonable, shorten Measuring Time, improve work efficiency.

Claims (5)

1. based on a measuring method for ZC-8 type earth resistance tester, it is characterized in that: comprise the following steps:
1) ZC-8 type earth resistance tester and suitable current potential, electric current, earthing pole p-wire is prepared;
2) unwrapping wire: operating personnel hold the grounded part that earth resistance tester and above-mentioned p-wire go straight to tested electrical equipment, by the A point of stadia surveying apart from tested electrical equipment 40 meters, and insert current probe at A point place, operating personnel continue the grounded part going straight to tested electrical equipment along unwinding direction, by the B point of stadia surveying apart from tested electrical equipment 20 meters, and insert potential probes at B point place, then operating personnel continue the grounded part moving towards tested electrical equipment, and the earthing pole of ZC-8 type earth resistance tester is connected with the grounded part of tested electrical equipment,
3) earth resistance is carried out;
4) take-up: operating personnel simultaneously by current potential, testing current line along the direction take-up of unwrapping wire, potential probes is removed to during B point position by take-up, and current probe is removed to during A point position by take-up;
5) clean surveying instrument and playback, surveying work terminates.
2. a kind of measuring method based on ZC-8 type earth resistance tester according to claim 1, is characterized in that: the earth resistance of described step 3) comprises the following steps:
Testing current line, potential test line are connected on current terminal and the potential end of ZC-8 type earth resistance tester by a;
ZC-8 type earth resistance tester is set level by b, and returns to zero;
Multiplying power switch is placed on maximum multiple by c, slow shake generator handle, rotation measuring dial simultaneously, making galvanometer pointer be on center, when examining flow index close to balance, accelerating shake generator handle, generator speed is made to reach rated speed 120r/min, and regulate measurement dial, make the stable finger of galvanometer pointer in center, namely can read the numerical value of stake resistance;
If the reading that d measures dial is less than 1 , multiplying power switch should be placed in less one grade, re-start measurement;
After e adjusts measurement parameter, carry out measuring and recording data;
F measures complete, is removed by the connecting line of each test end points on ZC-8 type earth resistance tester.
3. a kind of measuring method based on ZC-8 type earth resistance tester according to claim 1, is characterized in that: the grounded part of tested electrical equipment and A point position, B point position are in same rectilinear direction.
4. a kind of measuring method based on ZC-8 type earth resistance tester according to claim 2, is characterized in that: the computing formula of the numerical value of the stake resistance in described step c) is: stake resistance resistance=multiplying power * measures dial reading.
5. a kind of measuring method based on ZC-8 type earth resistance tester according to claim 1, is characterized in that: described stadimeter is Hand-hold Distance Finder.
CN201510843482.1A 2015-11-26 2015-11-26 Grounding resistor tester measurement method based on ZC-8 type CN105445560A (en)

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Application Number Priority Date Filing Date Title
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101825662A (en) * 2010-05-28 2010-09-08 贵州南源电力科技开发有限公司 Short-distance measurement method and structure of grounding resistance of grounding network
CN201990334U (en) * 2011-03-09 2011-09-28 重庆市电力公司沙坪坝供电局 Take-up and pay-off tool
CN203232102U (en) * 2013-05-16 2013-10-09 国家电网公司 Portable retractable cord device for ground resistance testing
CN203461615U (en) * 2013-07-27 2014-03-05 国家电网公司 Electric grounding resistance test line take-up device
CN104181399A (en) * 2014-09-17 2014-12-03 重庆市防雷中心 Ground resistance testing device and method for structures or buildings in water
CN104749444A (en) * 2013-12-31 2015-07-01 孙巍巍 Grounding resistance measuring device
CN204490227U (en) * 2015-03-13 2015-07-22 国家电网公司 ZC-8 type earth resistance meter detects special drum

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101825662A (en) * 2010-05-28 2010-09-08 贵州南源电力科技开发有限公司 Short-distance measurement method and structure of grounding resistance of grounding network
CN201990334U (en) * 2011-03-09 2011-09-28 重庆市电力公司沙坪坝供电局 Take-up and pay-off tool
CN203232102U (en) * 2013-05-16 2013-10-09 国家电网公司 Portable retractable cord device for ground resistance testing
CN203461615U (en) * 2013-07-27 2014-03-05 国家电网公司 Electric grounding resistance test line take-up device
CN104749444A (en) * 2013-12-31 2015-07-01 孙巍巍 Grounding resistance measuring device
CN104181399A (en) * 2014-09-17 2014-12-03 重庆市防雷中心 Ground resistance testing device and method for structures or buildings in water
CN204490227U (en) * 2015-03-13 2015-07-22 国家电网公司 ZC-8 type earth resistance meter detects special drum

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
劳动部培训司: "《电工仪表与测量》", 31 March 1995 *
夜光: "ZC-8型接地电阻测量仪使用方法", 《豆丁网》 *

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