How to use a ground resistance tester in a distribution cabinet

I haven't used it, but it should be clearly stated in the manual.

1.Zero first.

2.Clamp the end under test and the ground end.

3.Look at the readings.

It seems like such a process, but pay attention to the power plug of the ground resistance meter. It seems to say that there must be a good grounding, which may mean that there must be a ground wire in the socket, that is, the TN-S power supply system. You have to pay attention.

With a pole grounding wire, the other two levels are inserted on the ground 20 meters apart, shake the ground resistance table, to the stable speed of 120 rpm, adjust the ratio, with the number of digital index stability refers to the grounding resistance value.

There should be instructions for use.

HT5600 Double Clamp Multi-function Grounding Resistance Tester, excellent grounding system is an important guarantee for the safe and reliable operation of electric power, telecommunications and electrical equipment. The size of the grounding resistance is the basis for judging the quality of the grounding system. Accurate, fast, simple and reliable grounding resistance measurement methods have become an urgent need for technological progress in the field of lightning protection and grounding.

HT5600 Double Clamp Multifunctional Grounding Resistance Tester is suitable for telecommunications, electric power, meteorology, computer rooms, power distribution lines, tower transmission lines, gas stations, factory grounding networks, lightning rods, etc.

In addition to the function of the traditional auxiliary ground electrode measurement of grounding resistance, the instrument also has the unique function of unassisted ground electrode measurement, which changes the traditional measurement principle and means of testing grounding resistance: the use of double-jaw non-contact measurement technology does not need to hit the auxiliary ground electrode, and there is no need to isolate the grounding body from the load, so as to achieve the best measurement. Under the conditions of single-point grounding system and strong interference, the measurement method of hitting the auxiliary ground pole can be used for measurement.

Gaoming, there are 3C requirements and inspection report requirements, and there is an implementation standard.

Resistance test method (**) I. Ground resistance test requirements: aAC working grounding, grounding resistance should not be greater than 4; b.

Safe working grounding, grounding resistance should not be greater than 4; c.DC working grounding, grounding resistance should be determined according to the specific requirements of the computer system; d.The grounding resistance of lightning protection ground should not be greater than 10; e.

For shielding systems, if joint grounding is used, the grounding resistance should not be greater than 1. 2. Grounding Resistance Tester ZC-8 Grounding Resistance Tester is suitable for measuring the resistance value of various power systems, electrical equipment, lightning rods and other grounding devices. It is also possible to measure the resistance of low-resistance conductors and the resistivity of the soil.

3. The instrument is composed of a hand-cranked generator, a current transformer, a slip wire resistor and a galvanometer, etc., all of which are installed in a plastic shell and a leather shell for easy carrying. The accessories include auxiliary probe wires, etc., which are packed in the accessory bag. The principle of operation is a reference voltage comparison formula.

4. Check whether the tester is complete before use, and the tester includes the following devices. 1. One ZC-8 grounding resistance tester 2, two auxiliary grounding rods 3, one wire 5m, 20m and 40m.

Fifth, the use and operation of 1, the measurement of the grounding resistance value of the provisions of the wiring method on the instrument on the E end button connected to the 5m wire, P end button connected to the 20m line, C end button connected to the 40M line, the other end of the wire respectively connected to the DUT grounding electrode E, potential probe P and current probe C, and E, P, C should be kept in a straight line, the spacing is greater than or equal to 1 when the grounding resistance is measured when the wiring diagram is shown in Figure 1 to connect the two E end buttons on the instrument together. Related to this topic are as follows:

Turn left|Turn right.

When the measurement is less than 1 when the grounding resistance is measured and the wiring diagram is less than 1 when the grounding resistance is measured is shown in Figure 2, connect the two E terminal button wires on the instrument to the measured grounding body respectively to eliminate the additional error introduced by the resistance of the connecting wire to the measurement result during measurement. 2. Operation steps All wiring at the end of the instrument should be correct. The meter connection should be in firm contact with the ground electrode E, the potential probe p and the current probe C.

After the meter is placed horizontally, adjust the mechanical zero position of the galvanometer and return to zero. Set the "magnification switch" to the maximum magnification and gradually increase the speed of the crank to 150r min. When the galvanometer pointer is deflected in a certain direction, rotate the dial to return the galvanometer needle to the "0" point.

At this time, the reading on the dial is multiplied by the magnification file, which is the measured resistance value. If the galvanometer needle is still not balanced when the dial reading is less than 1, the magnification switch can be set to a lower magnification until it is fully balanced. If you find that the needle of the meter galvanometer is shaking, you can change the speed of the crank to eliminate the jitter.

6. Precautions 1: It is forbidden to measure when there is lightning or the measured object is electrified. 2. The instrument must be handled carefully when carrying and using it to avoid violent vibration.

Turn left|Turn right.

Answer: Hello, usually, the grounding resistance is measured using the heterogeneous frequency method, the main purpose is to avoid the measurement error caused by the power frequency interference of the surrounding high and low voltage power grid, and the high-precision test frequency selector will filter out all the signals other than the set frequency in the measurement loop, so as to ensure that the applied signal and the measurement results maintain a very high and accurate correspondence.

Hello, strictly speaking, the grounding body is not purely resistive, it will have a certain equivalent inductance, and the grounding impedance can more accurately describe the grounding characteristics of the grounding body. Because the inductive reactance is proportional to the frequency, the ground impedance value measured by the heterogeneous frequency method at the two frequency points is not equal, and the resistance part and the inductive impedance part of the grounding impedance of the grounding body can be solved by a simple binary equation.

Summary. Dear, I'm glad to answer for you! The measurement of the ground resistance of the distribution box can be carried out using a multimeter or a ground resistance tester.

First, make sure that the distribution box has been de-energized and that all equipment associated with it has also been turned off. Use an exclusion or other tool to disconnect the ground wire completely. Adjust the multimeter or earth resistance tester to resistance measurement mode and select the appropriate range.

The value of the ground resistance is between a few ohms and several hundred ohms, and the two test leads of the tester are connected to the ground rod and the main ground terminal, respectively. Make sure the test leads are in close contact to avoid any interference. Press the test button or rotate the test switch to start measuring the ground resistance.

After the test is completed, the measurement results are recorded and compared with the relevant norms or standards. If the ground resistance is less than the specified value, further troubleshooting is required and necessary maintenance measures are required. <>

Dear, I'm glad to answer for the defeat of the Ming group! The measurement of the ground resistance of the distribution box can be carried out using a multimeter or a ground resistance tester. First, make sure that the distribution box has been de-energized and that all equipment associated with it has also been turned off.

Use an eliminator or other tool to completely disconnect the quiver grounding wire. Adjust the multimeter or earth resistance tester to resistance measurement mode and select the appropriate range. The value of the ground resistance is between a few ohms and several hundred ohms, and the two test leads of the tester are connected to the ground rod and the main ground or carry wire terminal.

Make sure the test leads are in close contact to avoid any interference. Press the test button or rotate the test switch to start measuring the ground resistance. After the test is completed, the measurement results are recorded and compared with the relevant norms or standards.

If the ground resistance is less than the specified value, further troubleshooting is required and necessary maintenance measures are required. <>

The distribution box is an important component in the power system, which is used to distribute the main distribution line to different branches, so as to improve the power of various electrical equipment. It can be designed and distributed according to different needs and actual conditions to ensure the safe, reliable and efficient operation of the power system. <>

The grounding resistance can be a good measure of the grounding state of the wire, so it is safer to measure the wire when it is connected, and the data must be within the standard range. Generally speaking, when testing the grounding resistance, the test instrument that the cursor wants will be used, that is, the grounding resistance tester, so what is the use of the grounding resistance tester? Let's take a look with Qeeka Home experts.

1. What is the use of the grounding resistance tester?

Prepare a complete tester first, check the buried accessories, and require two grounding rods, one for auxiliary grounding and the other for detecting electrodes; Then insert the two grounding rods into the ground respectively, keep the depth at 400mm, and keep a distance of 20m between the two. Finally, place the shaker in a flat place next to the grounding body, and you can start the test.

2. What problems should be paid attention to when using a grounding resistance tester?

1. Pay attention to the selection of current.

Generally, the current in the grounding body is mainly based on AC fault current and lightning current, that is to say, the abnormal use of the circuit will pass through the grounding body, so when testing, it is necessary to select the appropriate current to test, so as to test the real resistance value data. If the lightning current is tested, it is a high-frequency current, so the DC ammeter cannot be selected for testing.

2. Pay attention to the arrangement of the pole.

When the tester is used, it is necessary to pay attention to the arrangement of the ground pole, if it is to test the A ground pole potential, the K ground electrode of the ground rod must be inserted in the CD, that is, the zero potential area, once the plug is wrong, the test result is inaccurate, and the actual situation can not be reflected, and it is very likely that the resistance value is small or large.

Summary: The above is an introduction to the use of the grounding resistance tester and what problems should be paid attention to when using the grounding resistance tester. I hope that the content shared can give you some reference, and if you want to know more about related knowledge, you can **** Qeeka Home Information.

1. Two-line method.

Conditions: There must be a ground that is known to be well grounded, such as pen, etc., and the measured result is the sum of the resistance of the ground being measured and the known ground. If it is known that the ground is much smaller than the geodetic resistance of the geodetic, the measurement results can be taken as the result of the geodesic.

It is suitable for: dense buildings or cement floors and other areas where sealing cannot be driven piles.

Wiring: E+ES to the ground being surveyed, H+S to the known ground.

2. Three-line liquid Hu Wei.

Conditions: There must be two ground rods: an auxiliary ground and a probe electrode. The distance between the grounding electrodes is not less than 20 meters.

The principle is to add a current between the auxiliary ground and the ground to be measured, measure the voltage drop between the ground to be measured and the probe electrode, and the measurement results include measuring the resistance of the cable itself.

Suitable for: foundation grounding, construction site grounding and lightning protection ball type lightning rod QPZ grounding.

Wiring: S is connected to the detection electrode, H is connected to the auxiliary ground, E and Es are connected to the ground to be measured.

3. Four-line method.

Basically the same as the three-wire method, which replaces the three-wire method when measuring low ground resistance and eliminating the influence of the resistance of the measured cable on the measurement results, E and ES must be separately and directly connected to the ground to be measured. This method is the most accurate of all ground resistance measurement methods.

4. Single-clamp measurement.

Conditions: Measure the ground resistance at each ground point in the multi-point ground, and the ground connection cannot be disconnected to prevent danger.

Suitable for: multi-point grounding, can not be disconnected, measure the resistance of each grounding point.

Wiring: Monitor the current at the measured grounding point with a current clamp.

5. Double pincer method.

Conditions: Multi-point grounding, no auxiliary ground piles, measurement of a single grounding.

Wiring: Use the current specified by the manufacturer to clamp to the corresponding socket, and clamp the two clamps on the grounding conductor, and the distance between the two clamps should be greater than meters.

Grounding resistance tester is a commonly used measurement tool in industry, construction, electric power and other fields, it can be used to measure grounding resistance, voltage, current and other parameters, so as to ensure the safety and reliability of electrical equipment and facilities. Next, we will talk in detail about the use of the search and solution ground resistance tester.

Step 1: Preparation.

Before using a ground resistance tester, we need to do some preparations. First of all, you need to check whether the battery of the tester is sufficient to ensure the accuracy of the test. Secondly, it is necessary to choose the appropriate test clip to clamp the grounding wire during the test to ensure that the test is accurate.

Step 2: Connect the tester.

The ground resistance tester is usually divided into two parts: the main unit and the test clip. When connecting the tester, you need to attach the test clip to the host computer and select the correct test mode.

Usually there are two types of test modes: regular mode and automatic mode. In normal mode, the tester needs to be operated manually, and in automatic mode, the tester will test automatically.

Step 3: Take the test.

When the tester is connected correctly, the test can begin. The following steps need to be followed when testing:

Hold the test clip to the ground wire.

Press the test button of the tester to start the test.

After the test is complete, read the test results.

If the test results are outside the safe range, the grounding wire needs to be repaired or replaced.

Step 4: Interpret the test results.

When the test is complete, the test results need to be interpreted. Typically, the tester will output a number that indicates the magnitude of the ground resistance. If the number is less than the safe threshold, the ground resistance is normal. Otherwise, it is necessary to go to Sun Cong to repair or replace the wires.

In addition, there are a few things to keep in mind when using a ground resistance tester:

The tester needs to be tested in a dry, ventilated place to avoid contamination of the tester.

The tester must not come into contact with water, otherwise the test result will be affected.

The tester needs to be tested in the state of equipment shutdown to avoid safety accidents.

Conclusion A ground resistance tester is a necessary measurement tool to ensure the safety and reliability of electrical equipment and facilities. When using a ground resistance tester, you need to prepare, connect the tester, perform the test, and interpret the test results. At the same time, it is also necessary to pay attention to the test environment and safety matters to ensure the accuracy and safety of the test.