Domain of inventions

The general method of the invention is to test / measure the grounding resistance, and to reduce or eliminate the need to place movable ground wood piles.



Background of invention

The ground tester is a device used to measure buried grounding rods or electrode grounding resistance. The correct grounding is necessary for many industries and applications and grounding proposals and practices, such as NEC (National Electrical regulations), OSHA, ANSI and TIA (Telecommunications Industry Association), IEEE, and many other organizations.


Grounding is used to provide ground connection from electronic and power supply. Grounding, fault, lightning, electromagnetic interference, radio frequency interference and other interference protection. Bad earthing can lead to injuries or deaths of people, animals and plants. It can also cause damage, poor operation, or malfunction of operating equipment and electronic products.



The description of the existing technology

At present, ground test measurements use the grounding and grounding resistance between the potential methods of falling. The fall's potential method requires three connections. The first connection to the ground is tested, and the second and third are connected to the ground to be placed at a distance from the ground to test the two bets.


In the execution of this method, its typical connection disconnects the ground, that is, the building, the equipment, and it is usually connected to other devices. The first (near) stock, then placed on the ground, from the distance from the earth. Second (far) shares other than the first equity between the ground and the second (far) shares, the equity is directly placed on the ground. Next, a signal is used to respect the second share of the earth. The first share is respecting the voltage drop of geodetic measurements, that is, "potential fall". Since a known current signal is known, the equity and grounding resistance between the earth can be determined. If the grounding resistance is within the allowable range, action can be taken to correct the problem. In order to accurately measure the grounding resistance, it is very important to use this method for the proper placement of the first and second interests. For example, it is important that the first share is sufficient from the earth ground and second of the shares, so as not to be affected by the grounding and the interval of second shares. However, one problem may get access to the first and second bets straight in the tested grounding. For example, in urban areas, usually located in the location of roads, buildings or other obstacles, the first and second interests need to be placed to prevent them from being placed at the right place. In other cases, it may be placed in the first (near) stock, but it is impossible to place second (far) shares.



Summary of the invention

The invention provides a telephone line that overcomes the problems raised in previous art, and provides additional advantages over the previous art grounding resistance test methods. This advantage will become clear after reading the attached normative research drawings.



Brief introduction of drawings

It is best to understand the structure and mode of operation and the further objects and advantages of the invention. We can refer to the following instructions. In connection with the drawings, we take the reference elements in digit recognition.


Fig. 1 illustrates the connection of the grounding resistance tester in the first method of the invention;


The ground resistance test diagram 2 illustrates the further details. 1;


Fig. three is a flowchart showing the steps of the first method of the present invention;


Figure 4 illustrates the connection of the ground resistance tester in accordance with the second methods of the present invention.


Further details of the grounding resistance test diagram shown in Figure 5. 4;


Fig. 6 is a flowchart showing the steps of the second methods of the present invention.


A detailed description of the embodiment of the images and texts

Though the invention may be embodied in different forms and displayed on the drawing, this article will introduce and understand in detail. The concrete embodiment of the present disclosure is regarded as an example of the principle of inventions, and there is no intention to restrict the description mentioned in the invention.


The present invention discloses a ground test method for the telephone communication system and the removal of the location of the first and second wooden piles by using an existing telephone line. Resettlement second shares (far) in the first method, only a single stock right that needs to be used is eliminated. In the second approach, the placement of the first (nearby) shares is eliminated, and the placement of second (far) shares is eliminated, leading to a risk - free method.


The first method is to measure the grounding resistance, the electrical system, including a pair of existing telephone lines, and the 10 diagram of the grounding resistance tester. 1-3. The 8 telephone line is a number of telephone lines (not shown) provided to the telephone line. The shield (not shown) also provides a telephone line. The grounding resistance tester connection 10 is shown in the first method according to the present invention. The steps of 1 and second and the first method are illustrated. 3.


As shown in the picture. 1, the ground resistance tester 10 includes housing 12, display 14, control 16 and more than 18 terminals. The earth resistance tester 10 is tested through the ground wire (green) 22 and 20 of the earth. The first (nearby) stock 24 is placed at the ground distance from the earth's ground space of 20. The first (near) stock 24 is connected to the ground resistance tester, through the first (near / blue) lead 26. The first share of the 24 positions, such as the test, to the first share of 24 and telephone line in the same direction, from the grounding line 20.


Instead of taking second (far) shares, the grounding resistance tester 10 connects to the telephone line to the second (far) ground resistance tester 10 lead 28. Second (far) lead 28 includes 1 and second (black) Part 28 B first part (red) 28. Part 281 provides the connection between the connection 10 and the edge tip 81 of the grounding resistance tester.