KR20120081313A - The ground rod installation method for electric pole - Google Patents

Abstract

PURPOSE: A method for installing a ground electrode of an electric pole is provided to easily install the ground electrode without other underground members by installing a plurality of ground electrodes around the electric pole. CONSTITUTION: A plurality of ground electrodes are temporarily installed around an electric pole with a constant space(S100). An individual ground resistor of the ground electrode is measured(S110). A pole ground line of the electric pole is serially connected to a ground lead line(S200). The maximum ground effect is generated by installing the minimum number of the ground electrodes(S300). Ground lead lines of the ground electrode are mutually connected if the maximum ground effect is generated by installing the minimum number of the ground electrodes(S400).

Description

Grounding pole construction method of Jeonju {THE GROUND ROD INSTALLATION METHOD FOR ELECTRIC POLE}

The present invention relates to a pole pole construction method that can be obtained with the maximum grounding effect with the minimum ground rod construction.

In general, various electrical facilities such as electric poles, street lights, and switchboards (hereinafter referred to as Jeonju) are installed with grounding electrodes in the ground to secure electrical stability from lightning strikes and surges, and to prevent various safety accidents due to short circuits. Done.

1 is a conceptual view showing a conventional pole pole construction appearance. Referring to FIG. 1, the first ground electrode 112 is buried in the vicinity of the electric pole 100 with a hammer or an electric hammer. In addition, when the prescribed ground resistance is not secured by constructing the first ground electrode 112, the second ground electrode 114 is additionally constructed in parallel with the first ground electrode 112 by 2 m or more.

Connection of the pole 100 and the ground electrode 112, 114, withdraw the pole pole ground wire 104 through the ground wire inlet 101 and the ground wire outlet 102 formed in the upper and lower poles 100, and the pole pole ground wire 104 and The ground lead wires 112a and 114a connected to the upper portions of the ground electrodes 112 and 114 are connected by a compression connection method using the ground sleeve 108.

The ground wire lead-out port 102 is formed at a point of 1 m or less from the ground G, and the ground lead wires 112a and 114a are buried so as to be 0.75 m or more from the ground G. On the other hand, the ground electrodes 112 and 114 are mainly made of copper-based metal rods.

However, in the case of conventional pole pole construction, when excavating up to 75cm underground to bury the ground pole, in urban areas, there may be damage to the existing underground underground facilities such as water pipes, gas pipes, and communication cables. There was a problem that it takes a lot of inconvenience and time to work.

In addition, when the grounding pole construction is completed without securing the grounding resistance to the specified value to avoid underground burial, the transformer failure, switchgear, lightning arrester, etc. installed in the pole will not be quickly distributed through the grounding pole in the event of lightning or surge. There was a problem that was likely.

Therefore, there is a search for a construction method of pole poles that can achieve the maximum grounding effect while avoiding the buried underground buried material.

Embodiments of the present invention provide a maximum grounding effect by installing a plurality of grounding electrodes by installing a plurality of grounding electrodes at equal intervals along the circumference and measuring and comparing grounding resistance for each case derived according to the permutation of the grounding electrodes. By deriving, we want to provide a pole pole construction method that can maximize the grounding effect while avoiding the underground buried underground.

According to an aspect of the present invention, a step of installing a plurality of grounding poles at equal intervals along the circumference of the pole, and giving an identification symbol to each of the grounding poles; B) temporarily connecting the pole pole ground wire of the pole and the ground lead wire of the ground poles so as to correspond to each case derived by permutation of the ground poles; And a step c of deriving a case in which the maximum grounding effect is obtained by installing the minimum number of grounding electrodes among the cases derived according to the permutation of the grounding electrodes by measuring and comparing the grounding resistance in each case. A method may be provided.

In addition, after step a, the method may further include a1 step of measuring individual ground resistances of the ground electrodes by connecting the pole pole ground wires of the pole and the ground lead wires of the ground electrodes, respectively.

In addition, after step c, the method may further include a step d of interconnecting the ground lead wires of the ground electrodes corresponding to both ends in the permutation corresponding to the case where the minimum number of ground electrodes are installed to show the maximum grounding effect.

According to another aspect of the invention, the first step of installing a first ground electrode to be spaced apart 6 to 8cm from the ground wire outlet of the pole; A second step of installing a second ground electrode at a position in which the first ground electrode installation position is rotated 90 degrees counterclockwise with respect to the center of the pole; A third step of installing a third ground electrode at a position in which the second ground electrode installation position is rotated 90 degrees counterclockwise with respect to the center of the pole; The pole ground wire from the ground lead outlet is connected to the first ground lead wire of the first ground electrode, and the first ground lead wire is hypothesized in a clockwise direction with respect to the center of the pole to connect with the third ground lead wire of the third ground electrode. A fourth step of making; And a fifth step of installing the third ground lead wire in a clockwise direction with respect to the center of the pole to connect the second ground lead wire to the second ground lead wire of the second ground electrode.

Further, after the fifth step, a sixth step of connecting the first ground lead wire of the first ground electrode by hypothesizing the second ground lead wire of the second ground electrode in a clockwise direction with respect to the center of the pole; can do.

Embodiments of the present invention by installing a plurality of ground electrodes along the circumference of the pole, it is possible to construct the ground electrode to avoid the buried underground buried material.

In addition, by installing a ground electrode around the pole to greatly narrow the construction area than the conventional, it is possible to construct the ground electrode more quickly and cost-effectively.

In addition, it is possible to maximize the grounding efficiency of poles by deriving a case in which the maximum grounding effect is obtained with the minimum number of grounding poles by changing the ground lead wire connection order of the grounding poles installed along the circumference.

1 is a conceptual view showing a conventional pole pole construction appearance.
Figure 2 is a flow chart showing the order of the pole construction method pole pole according to an embodiment of the present invention.
3A to 3D are conceptual views illustrating a method of constructing a ground electrode of FIG. 2 in order.

Hereinafter, with reference to the accompanying drawings, it will be described in detail embodiments of the present invention.

Figure 2 is a flow chart showing the order of the pole construction method pole pole according to an embodiment of the present invention. In addition, the same member as FIG. 1 was represented with the same code | symbol.

Referring to FIG. 2, the pole pole construction method (p) first installs a plurality of ground electrodes 110 at equal intervals along the perimeter of the pole 100, and gives identification symbols to each of the plurality of ground electrodes 110. (Step a).

The ground electrode 110 may use a copper-based metal rod, and the number of ground electrodes 110 is not limited. However, hereinafter, for convenience of description, the electric pole 100 is divided into four equal parts, and the four ground electrodes 110 will be described below.

The manner in which the identification symbol is assigned may be set so that the ground electrodes 110 can be distinguished from each other and are not limited to a specific method. For example, the ground electrode 110 that is temporarily installed closest to the ground wire outlet 102 may be referred to as a first ground electrode 112, and the second ground electrode 114 may be sequentially counterclockwise with respect to the first ground electrode 112. ), An identification symbol may be given to the third ground electrode 116 and the fourth ground electrode 118 (above S100).

Next, in order to correspond to each case derived according to permutation of the ground electrodes 110, the pole ground wire 104 of the pole 100 and the ground lead wires of the ground electrodes 110 are serially connected (b). step).

Here, each case derived according to permutation of the ground electrodes 110 refers to the number of cases in which r pieces of the ground electrodes 110 to which the identification symbol is assigned are drawn out and lined up in a line. The calculation of the number in this case depends on _n P _r = n! / (Nr) !.

For example, when four ground electrodes 110 are installed around the pole 100, the number of cases in which the ground electrodes 110 are arranged in a line is 24 ( ₄ P ₄ ), and among the four ground electrodes 110. The number of three drawn and lined up is 24 as well ( ₄ P ₃ ).

Thus, for example, in the case of the first ground electrode 112-the second ground electrode 114-the third ground electrode 116-the fourth ground electrode 118 among the various cases derived according to the permutation of the ground electrodes 110. The pole ground wire 104 is connected to the first ground lead wire 112a of the first ground electrode 112, and is further connected to the second ground lead wire 114a, the third ground lead wire 116a, and the fourth ground lead wire 118a. Serial is connected in order (more than S200).

Next, the ground resistance in each case is measured, and the ground resistance in each case is compared with each other, and the maximum grounding effect is obtained by installing the minimum number of ground electrodes among the cases derived according to the permutation of the ground electrodes 110. (Step c).

As the method for measuring the ground resistance, a known method may be used. For example, the ground resistance value Ω may be measured by a hook-on ground resistance meter (not shown) (S300).

Meanwhile, in the pole pole construction method (p), the ground poles 110 are temporarily installed, and then the respective ground resistances of the ground poles 110 are measured by connecting the pole pole ground wire 104 and the ground lead wires of the ground poles 110, respectively. It may further include a step (step a1).

In this case, there is an effect that the individual ground resistance of the ground electrodes 110 and the ground resistance when the ground electrodes 110 are connected to each other can be compared (above S110).

Next, in the permutation corresponding to the case where the minimum number of ground electrodes derived as described above exhibits the maximum grounding effect, the ground lead wires of the ground electrodes 110 corresponding to both ends are interconnected (step d).

For example, when the case where the minimum number of ground electrodes are provided to show the maximum grounding effect is derived from the first ground electrode 112-the third ground electrode 116-the fourth ground electrode 118-the second ground electrode 114, The first ground lead line 112a of the first ground electrode 112 corresponding to one end and the second ground lead line 114a of the second ground electrode 114 corresponding to the other end are connected to each other.

As such, the interconnection of the ground lead wires of the ground electrodes 110 corresponding to both ends is because the ground resistance is inversely proportional to the separation distance between the ground poles, and thus, the widest separation distance between the ground poles is advantageous to lower the ground resistance. (More than S400).

Test Example

Hereinafter, a test example according to the pole pole construction method (p) according to an embodiment of the present invention will be described in detail.

3A to 3D are conceptual views illustrating the method (p) for constructing the ground electrode of FIG. 2 in order. Referring to FIGS. 3A to 3D, four ground electrodes 110 are temporarily installed by dividing the periphery of the electric pole 100 into four parts, and identification symbols are assigned to the ground electrodes 110, respectively.

Specifically, a ground electrode installed 6 to 8 cm apart from the ground wire outlet 102 of the pole 100 is determined as the first ground electrode 112, and the installation position of the first ground electrode 112 is half based on the first ground electrode 112. The ground electrode installed at the position rotated 90 degrees clockwise was determined as the second ground electrode 114. Similarly, the ground electrode installed at the position where the second ground electrode 114 is rotated 90 degrees in the counterclockwise direction is designated as the third ground electrode 116, and the third ground electrode 116 is rotated 90 degrees in the counterclockwise direction. The ground electrode installed at the position was designated as the fourth ground electrode 118.

Next, the electric pole ground wire 104 and the ground lead wires of the ground electrodes 110 were respectively connected to measure individual ground resistances of the ground electrodes 110. The measurement results are shown in Table 1 below.

Grounding pole Ground first pole Second Ground Electrode Third Ground Electrode 4th Grounding Electrode Earth resistance (Ω) 423 136 75 80

Next, in order to correspond to each case derived by permutation of the ground electrodes 110, the pole ground wire 104 of the pole 100 and the ground lead wires of the ground electrodes 110 are connected in series, and each The ground resistance in the case was measured.

In each case, the ground lead wires of the ground electrodes 110 corresponding to both ends were interconnected and the ground resistance was measured again. Of these, five cases of low ground resistance values are summarized in Table 2 below.

In Table 2, the first ground electrode 112 is indicated by ①, the second ground electrode 114 is ②, the third ground electrode 116 is ③, and the fourth ground electrode 118 is indicated by ④. For example, ① + ② + ③ + ④ means a case in which the first ground electrode 112, the second ground electrode 114, the third ground electrode 116, and the fourth ground electrode 118 are temporarily connected in the order.

How to connect
Connection Example 1 Connection example 2 Connection Example 3 Connection example 4 Connection example 5 ① + ② + ③ + ④ ① + ② + ③ ① + ② + ③ + ① ① + ③ + ② ① + ③ + ② + ① Earth resistance (Ω) 79 130 88 72 47

As can be seen in Table 2, the pole pole ground wire 104 from the ground wire outlet 102 is connected to the first ground lead wire 112a of the first ground electrode 112, and the first lead ground wire 112a is poled ( 100) rotated 180 degrees clockwise with respect to the center, spaced apart and hypothetically connected to the third ground lead line 116a of the third ground electrode 116, and the third ground lead line 116a is centered on the center of the electric pole 100 again. In the case of connecting with the second ground lead line 114a of the second ground electrode 114 by spaced apart and hypothetically rotated by 90 degrees clockwise as a reference (connection example 4), the ground resistance was low as 72 Ω.

This is compared with the case where the four ground electrodes are spaced apart and installed by rotating 90 degrees counterclockwise (connection example 1) or when the three earth electrodes are spaced apart and constructed by rotating 90 degrees counterclockwise (connection examples 2 and 3). It is a low value.

In this case, the second ground lead line 114a of the second ground electrode 114 is hypothesized in a clockwise direction with respect to the center of the pole 100 to connect with the first ground lead line 112a of the first ground electrode 112. It can be seen that when the ground lead wires of the ground electrodes corresponding to both ends are interconnected (connection example 5), the ground resistance is further lowered to 47Ω.

As described above, in the embodiments of the present invention, by installing a plurality of ground electrodes along the circumference of the electric pole, the ground electrodes may be constructed to avoid the buried underground buried material. In addition, by installing a ground electrode around the pole to greatly narrow the construction area than the conventional, it is possible to construct the ground electrode more quickly and cost-effectively. In addition, it is possible to maximize the grounding efficiency of poles by deriving a case in which the maximum grounding effect is obtained with the minimum number of grounding poles by changing the ground lead wire connection order of the grounding poles installed along the circumference.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, many modifications and changes may be made by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims. The present invention can be variously modified and changed by those skilled in the art, and it is also within the scope of the present invention.

G: Floor 100: Pole
101: ground wire inlet 102: ground wire inlet
104: ground wire 108: ground sleeve
110: grounding electrode 112: first grounding electrode
112a: first ground lead wire 114: second ground electrode
114a: second ground lead wire 116: third ground electrode
116a: second ground lead wire 118: fourth ground electrode
118a: fourth ground lead wire

Claims (5)

A step of temporarily installing a plurality of ground electrodes at equal intervals along the circumference of the electric pole, and giving identification symbols to the ground electrodes;
B) temporarily connecting the pole pole ground wire of the pole and the ground lead wire of the ground poles so as to correspond to each case derived by permutation of the ground poles; And
Measuring and comparing the ground resistances in each case, and c) deriving a case in which the maximum grounding effect is obtained by installing the minimum number of grounding electrodes in each case derived according to the permutation of the grounding electrodes. .
The method of claim 1,
After step a,
And a1 step of connecting the pole pole ground wires of the pole and the ground lead wires of the ground poles to measure individual ground resistances of the ground poles.
The method of claim 1,
After step c,
And a step d of interconnecting the ground lead wires of the ground electrodes corresponding to both ends in a permutation corresponding to the case where the minimum ground electrodes are installed to show the maximum grounding effect.
A first step of installing a first ground electrode to be spaced apart from the ground wire outlet of the pole by 6 to 8 cm;
A second step of installing a second ground electrode at a position in which the first ground electrode installation position is rotated 90 degrees counterclockwise with respect to the center of the pole;
A third step of installing a third ground electrode at a position in which the second ground electrode installation position is rotated 90 degrees counterclockwise with respect to the center of the pole;
The pole ground wire from the ground lead outlet is connected to the first ground lead wire of the first ground electrode, and the first ground lead wire is hypothesized in a clockwise direction with respect to the center of the pole. A fourth step of making; And
And a fifth step of installing the third ground lead wire in a clockwise direction with respect to the center of the pole to connect the second ground lead wire to the second ground lead wire of the second ground electrode.
The method of claim 4, wherein
After the fifth step,
And a sixth step of connecting the second ground lead wire of the second ground electrode clockwise with respect to the center of the pole to connect the first ground lead wire of the first ground electrode.

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