KR100475977B1 - Measurement device of electric power distribution line and measurement method thereof - Google Patents

Abstract

MEASURING MEASUREMENT AND MEASUREMENT METHOD WHICH CAN MEASURE VOLTAGE, CURRENT, POWER, OR ELECTRICAL SIGNALS IN THE ACTIVE STATUS OF THE POWER TRANSMISSION SYSTEM. Probe having a needle bar and a male thread portion invading into the probe body, an insulating member for insulating the probe body, a cable support having a guide groove for guiding the cable, and a female thread portion rotatably coupled to the male thread portion. A measuring method using a measuring device of a power transmission system including a main body support, comprising: inserting a cable to be measured by the power transmission system into a guide groove of a cable support; rotating a insulating member to infiltrate the needle bar into the cable; The process of connecting the connection jack of a wire to a circuit tester is provided.

By using the measuring apparatus and measuring method of the power transmission system as described above, it is possible to prevent an accident due to the electric shock of the measurer when measuring the power, voltage, and current of the cable under measurement in the live state in which power is being supplied.

Description

Measuring device of electric power distribution line and measurement method

The present invention relates to a measuring apparatus and a measuring method for measuring voltage, current, power or electrical signals in a line of a power transmission system, and particularly, to measure voltage, current, power or electrical signals in a live state during power supply. The present invention relates to a measuring apparatus and a measuring method.

In general, a circuit tester is used to measure voltage, current, and power consumption in a power source using electricity such as a home or a factory.

This circuit tester is an electrical instrument with a unit that can measure resistance, voltage and current. It is assembled in one body. It is used to check the resistance (OHMS) and DC voltage (DC V) of storage batteries or batteries, light bulbs, receptacles, and diodes. ), AC voltage (AC V) and DC current (DC mA).

When measuring the resistance, voltage and current of the inspection target using the circuit tester as described above, the measurement is performed using the red and black lead wires used in pairs as shown in FIG.

Conventional circuit tester leads 10 and 10 'have positive and negative test probes 11 and 11' contacting the plus and minus terminals respectively, and the positive and negative electrode terminals of the circuit tester main body 40. Connecting jacks 12 and 12 'connected to the 41 and 41', respectively, and one end connected to the test probes 11 and 11 ', and the other end connected to the connecting jacks 12 and 12'. Wires 13, 13 ′, and the handles 14, 14 ′ molded into the insulator, with the exception of certain ends of the test probes 11, 11 ′ connected to the wires 13, 13 ′ and the wires 13, 13 ′. .

When measuring the resistance, voltage, and current of an inspection target such as a battery or a battery, a light bulb, an outlet, a diode, and the like using the circuit tester leads 10 and 10 ', hold the handles 14 and 14' of the lead wire. The test probe 11 of the red lead wire 10 is connected to the positive terminal to be inspected, and the test probe 11 'of the black lead wire 10' is connected to the negative terminal to be inspected. When the red and black lead wires 10 and 10 'are connected to the plus and minus terminals respectively, the display window 42 of the circuit tester 40 displays the resistance, voltage or current value of the inspection object.

However, in the circuit tester as described above, when the short distance is measured, it can be used by one hand, but when there is a relatively long distance, there is a problem that it cannot be measured by one hand.

An example of a technique for solving this problem is disclosed in Korean Utility Model Publication No. 20-0268652.

In the technique disclosed in the above publication, one of the first measuring rods in which one of the tesite probes connected to the wire is molded into the insulator except for a certain end, and the other one of the test probes connected to the wire is molded into the insulator except the certain end A second measuring rod, a first measuring rod and a second measuring rod are respectively connected to a lower end and a measuring bar composed of a straight bar made of an insulator provided with a hollow part for receiving a wire therein is provided for plus (+) and minus (-) of the inspection object. There is disclosed a lead for circuit tester which allows resistance, current and voltage measurement with one hand by adjusting the distance between the plus and minus test probes according to the measuring distance of the terminal.

However, the above-mentioned lead wires for circuit testers can be easily used for the measurement of electronic circuit boards provided in the inspection object, but they cannot be used for power transmission systems such as buried cables, power supply terminal lines of terminal boxes, and the like.

Therefore, the measurement mechanism as shown in FIG. 2 was used for the measurement in the power transmission system.

In Fig. 2, reference numerals 20 and 20 'are clamp members for fixing to and connecting the wires from which the coating is removed in order to detect electric power or the like in the cable under test.

That is, in order to use the clamp members 20 and 20 'shown in FIG. 2, the measurer first peels off a certain portion of the covering material from the cable to be measured, and then attaches the clamp members 20 and 20' to the stripped wire to measure the measurement. Was executed.

However, in the conventional method as described above, it is not easy to peel off the sheath of the cable of the power transmission system, so that the measurement work is cumbersome, and there is a risk of an electric shock during the peeling of the sheath. There was a risk.

Moreover, when using the measuring mechanism shown in FIG. 2, there also existed a problem that the process of the coating | cover (insulator) of the cable peeled off after measurement was difficult.

An object of the present invention is to solve the problems described above, and to provide a measuring apparatus and measuring method of a power transmission system that can prevent the risk of electric shock and electrical short circuit accident of the measurer even in a live state.

Another object of the present invention is to provide a measuring apparatus and a measuring method of a power transmission system that does not need to recover the cable after the measurement of the cable of the power transmission system.

It is still another object of the present invention to provide a measuring apparatus and a measuring method of a power transmission system capable of performing measurement of a cable of a power transmission system without fixing the cable under measurement.

In the present invention, the power transmission system includes a high voltage distribution line of 3,300 volts or less, a low voltage distribution line of 380 volts, 220 volts, 110 volts, etc., supplied to a customer from a power company, and also includes a communication line.

In addition, the measuring device and measuring method in the present invention is for measuring the voltage, current, power or electrical signals flowing through the cable of the power transmission system.

In order to achieve the above object, the measuring device of the power transmission system of the present invention is a measuring device for measuring the voltage, current, power or electric signal of the cable in the line of the power transmission system, at one end of the needle bar invading the cable Is formed, the other end of the wire insertion groove in the center and the first coupling portion for coupling with the insulating member is formed on the outside of the center, the middle portion of the one end and the other end of the probe made of a metal conductor with a male thread formed A main body, integrally coupled with the first coupling portion of the probe body, the insulating member for insulating the probe body, and an insulator, for coupling with a guide groove and a body support for guiding the cable; A cable support having a second coupling portion and a same metal conductor as the probe body and in the cable support The mouth is engaged with the engagement portion of the second, it characterized in that it includes a probe main body support portion and said male thread portion rotating female screw that can be coupled are formed formed in the probe main body.

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In addition, in the measuring device of the power transmission system according to the present invention, the coated wire inserted into the wire insertion groove is inserted into the wire insertion groove is characterized in that it is fixed by soldering or tannery screw.

In addition, in the measuring device of the power transmission system according to the present invention, the cable guide groove of the cable support is characterized in that one side is convex, the other side is inserted into the auxiliary frame concave.

In addition, in the measuring device of the power transmission system according to the present invention, the needle bar is characterized in that invading the cable in a live state.

In addition, the measuring method of the power transmission system according to the present invention to achieve the above object is to measure the voltage, current, power or electrical signal of the cable in the line of the power transmission system, at one end is a needle bar invading the cable Is formed, the other end is formed in the center of the wire insertion groove and the outer portion is coupled to the coupling member for coupling with the insulating member, the middle portion of the one end and the other end of the probe body made of a conductor with a male thread, the probe A second coupling part integrally coupled with the first coupling part of the main body, the insulating member for insulating the probe body and an insulator, and a second coupling part for coupling with a guide groove and a body support for guiding the cable; The second coupling is made of a cable support and the same conductor as the probe body and inserted into the cable support A measuring method using a measuring device of a power transmission system coupled to the unit, comprising a probe body supporter formed with a female threaded portion rotatably coupled to the male threaded portion formed on the probe body, to be measured in the power transmission system Inserting a cable into the guide groove of the cable support; injecting the needle into the cable by the needle moving means; and connecting a connection jack of a wire to a circuit tester.

In the measuring method of the power transmission system according to the present invention, before inserting the cable into the cable guide groove of the cable support, one side is convex and the other side is inserted into the cable guide groove. It further comprises a step.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In addition, in drawing, the same code | symbol is attached | subjected to the same code | symbol, and the repeated description is abbreviate | omitted.

3 is a cross-sectional view of the probe main body in the measuring device of the power transmission system according to the present invention, Figure 3 (a) is a cross-sectional view of the probe main body, Figure 3 (b) is a cross-sectional view of the insulating member, c) is the coupling degree of the probe body and the insulation member.

In Fig. 3 (a), reference numeral 50 denotes a probe body made of a substantially cylindrical shape for measuring voltage, current, power or electric signal of a cable in a line of a power transmission system (not shown), and reference numeral 51 denotes an insulator. It is a needle rod formed in the shape of a needle at the tip of the probe main body 50 in order to penetrate the cable covered with the, and (52) is a male screw portion formed in the central portion of the probe main body (50). Reference numeral 53 is a first insertion groove provided at the other end of the probe body, and 54 is an opposite surface of the needle bar 51 for inserting the coated wire for connecting to the circuit tester and the probe body 50. In the center portion of the wire insertion groove which can insert the conductor 59 portion of the coated wire to be described below.

As shown in FIG. 3 (c), the wire insertion groove 54 is stripped of the sheath 58 at the tip of the sheathed wire so that the conductor 59 of the sheathed wire and the probe body 50 conduct. After the insertion, the conductor 59 and the probe main body 50 are fixed with a tab such as solder or a tannery screw after insertion.

The probe body 50 is made of brass and is integrally formed with the needle bar 51 and the male screw portion 52 to facilitate conduction with the copper wire in the insulated cable under test.

In Fig. 3B, reference numeral 55 denotes a cylindrical insulating member made of high-strength resin to insulate the probe body 50 from the outside, and 56 is inserted into the first insertion groove 53. The first projection to be fitted, 57 is a guard extending from the insulating member 55 to surround the conductor portion of the male thread portion 52, and 79 is the conductor portion 59 of the sheathed wire and the probe The headless screw is coupled to the main body 50.

The insulation member 55, the 1st protrusion 56, and the guard 57 are also integrally formed by shaping | molding.

Next, the probe main body 50 shown in FIG. 3 (a) is inserted into the insulating member 55 shown in FIG. 3 (b) so that the first insertion groove 53 and the first protrusion 56 are formed. It will be in the state shown in FIG.3 (c) by fitting.

4 is a cross-sectional view of the cable support in the measuring device of the power transmission system according to the present invention, FIG. 4 (a) is a cross-sectional view of the cable support and FIG. 4 (b) is a cross-sectional view of the probe main body support. (c) is the coupling of the cable support and the probe body support.

In Fig. 4 (a), 60 is a semicircular cable support made of high strength resin similar to the insulation member 55, and 61 is a cable guide groove provided inward at the center of the cable support 60. As shown in Figs. In the cable guide groove 61, the cables under measurement 68 and 69 are guided and mounted as shown in FIG.

Further, reference numeral 62 denotes a coupling part formed of a hollow cylinder and fitted with the inside of the guard 57, 63 is a through hole, and 64 denotes a coupling part protruding in the hollow direction of the coupling part 62. It is a projection of two. The cable support 60, the coupling part 62, and the 2nd protrusion 64 are also integrally formed by shaping | molding similarly to formation of the insulating member 55. FIG.

In addition, in FIG.4 (b), 65 is a 2nd insertion groove fitted with the 2nd projection 64, and 66 is rotation with the male screw part 52 of the probe main body 50. In addition, in FIG. A female screw portion that is possibly coupled, and 67 is a probe body support that is inserted into the through hole 63 to support the probe body 50. The probe body support 67 is also made of brass which is the same conductor as the probe body and is formed by molding.

Next, the second projection 64 in the through hole 63 shown in FIG. 4 (a) is inserted into and fitted into the second insertion groove 65 shown in FIG. 4 (b). The state shown in c) is obtained.

5 is a cross-sectional view of the coupling state of the probe main body of FIG. 3 (c) and the cable support of FIG. 4 (c).

That is, the male screw portion 52 and the female screw portion 66 of the probe body 50 are screwed to the protruding portion of the coupling portion 62 so as to conduct with the conductor portion 69 in the power cable or communication insulation cable sheath 68. The measurement apparatus of the power transmission system shown in FIG. 5 is completed by making it smooth.

Next, a method of using the measuring device of the power transmission system shown in FIG. 5 will be described.

First, the measurer rotates the insulating member 55 in a counterclockwise direction so that the covered cables 68 and 69 are sufficiently inserted into the cable support 60 in the state shown in FIG. After widening the gap between the needle and the needle bar 51, insert the cables (68, 69) to be measured in the power transmission system into the guide groove 61 of the cable support (60).

In the present invention, since the first projection 56 of the insulating member 55 and the first insertion groove 53 of the probe main body 50 are fitted together and fixed, the probe according to the rotation of the insulating member 55. The main body 50 also rotates in the same direction. In addition, the probe body 50, which is connected to the cable, is insulated by the insulating member 55, so that the measurer only needs to operate the insulating member 55 without any preparation for electric shock.

Next, the insulating member 55 is rotated clockwise so that the needle bar 51 penetrates through the sheath 68 of the cable and reaches the conductor portion 69 in the insulating cable. The male screw portion 52 is released from the female screw portion 66 by the rotation of the insulating member 55, and the needle bar 61 is brought into close contact with the cable side. Therefore, the measurer may omit a separate operation for fixing the measuring device and the cable during the operation for measuring the voltage, current, power or electrical signal of the power cable or communication cable.

Next, in the state where the needle bar 51 and the cable are connected, the jack connected to the coated wires 58 and 59 is connected to the circuit tester to perform the necessary measurement.

As described above, the measurer only needs to work through the insulating member 55, so that the step of injecting the needle bar 51 into the cable is performed in the live state in which power is being supplied.

Next, another embodiment of the present invention will be described with reference to FIG.

6 is the same as the measuring apparatus of the power transmission system shown in FIG. 5 except that the elastic member is used instead of the male thread portion 52 and the female thread portion 66 shown in FIG. Description is omitted.

In Fig. 6 (a), 70 is an elastic member made of a spring spring, 71 is integrally formed with the cable support 60 and is a handle portion protruding outward from the end of the coupling portion (62).

That is, in FIG. 6A, instead of the male screw portion 52 and the female screw portion 66, the portion between the male screw portion 52 and the probe body support 67 of the probe body 50 shown in FIG. 5 is replaced with the male screw portion 52 and the female screw portion 66. An elastic member insertion groove is provided and a spring, which is an elastic member, is inserted into the elastic member insertion groove. In addition, the prevention jaw is provided in the elastic member insertion groove in place of the female screw portion 66 of the probe main body support 67, and prevents the elastic member from being separated.

Due to this structure, the probe body 50 can be linearly moved by the spring 70.

The use of the measuring device of the power transmission system shown in FIG. 6 is as follows.

First, in order to mount the cable under test to the cable guide groove 61, the measurer pulls the handle 71 with one hand and pulls the insulating member 55 to the right with the other hand. As shown in FIG.

Next, after mounting the cable in the cable guide groove 61, when the measurer releases the insulating member 55, the needle bar 51 is applied to the cable guide groove 61 by the retracting elastic force of the spring (70). Will be added.

The operation of the measurer after contact between the needle bar 51 and the copper wire in the cable is the same as that described with reference to FIG. 5.

Next, another embodiment of the present invention will be described with reference to FIG. 7.

In Fig. 7, 72 is an auxiliary frame for mounting in the cable guide groove 61 when the cable is thin or the gap between the cable support 60 and the needle bar 51 is not narrowed.

One side of the auxiliary frame 72 is convex to fit tightly into the cable guide groove 61, the other side of the groove is smaller than the size of the cable guide groove 61 so as to fit the thin cable It is.

As described above, the auxiliary frame 72 is used when the cable is thin or the gap between the cable support 60 and the needle bar 51 is not narrowed so that the needle bar 51 cannot penetrate the sheath of the cable. It is very convenient.

As mentioned above, although the invention made by the present inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

As described above, according to the measuring device and the measuring method of the power transmission system of the present invention, when the cable to be measured is mounted in the cable guide groove, and the needle bar passes through the coating and contacts the copper wire in the cable. Even by a simple operation of rotating the insulation member, the effect of easily measuring the voltage, current, power, or electric signal of the power transmission system can be obtained.

In addition, according to the measuring apparatus and measuring method of the power transmission system of the present invention, by measuring the voltage, current, power or electrical signal of the cable under measurement by connecting to an insulated wire or a bare wire in the live state of the power and communication cable It can have a great effect of preventing electric shock and electric safety accident.

In addition, according to the measuring device and measuring method of the power transmission system of the present invention, since the measuring device connected to the cable is completely fixed to the copper wire in the cable, there is no movement or movement of the measuring device and thus there is no effect of risk of electric accident. .

1 is a view showing a state of use of a lead wire for a conventional circuit tester,

2 is a view showing a measurement method of a line of a conventional power transmission system;

3 is a cross-sectional view of the probe body in the measuring device of the power transmission system according to an embodiment of the present invention;

4 is a cross-sectional view of the cable support in the measuring device of the power transmission system according to an embodiment of the present invention;

5 is a cross-sectional view of a coupling state of the probe body of FIG. 3 and the cable support of FIG. 4;

6 is a cross-sectional view of a measuring device of a power transmission system according to another embodiment of the present invention.

7 is a cross-sectional view of a measuring device of a power transmission system with an auxiliary frame according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

50: probe body 51: needle bar

52: male thread 54: wire insertion groove

55 insulation member 60 cable support

61: cable guide groove 66: female thread

72: auxiliary frame

Claims (8)

In the measuring device for measuring the voltage, current, power or electrical signal of the cable in the line of the power transmission system, A needle bar is formed at one end to penetrate the cable, and at the other end, a wire insertion groove is formed at a central portion thereof, and a first coupling portion is formed at an outer side of the central portion to couple with an insulating member. Probe body made of a metal conductor formed with a male thread, The insulating member integrally coupled with the first coupling part of the probe body and insulating the probe body, A cable support made of an insulator and having a second engaging portion for engaging with the guide groove and the body support for guiding the cable; A probe body supporter formed of the same metal conductor as the probe body, inserted into the cable support, coupled to the second coupling portion, and having a female screw portion rotatably coupled to the male screw portion formed on the probe body; Measuring apparatus of the power transmission system comprising a. delete delete The method of claim 1, The coated wire inserted into the wire insertion groove is inserted into the wire insertion groove and then fixed by soldering or a flat head screw. The method of claim 1, The cable guide groove of the cable support, the measuring device of the power transmission system, characterized in that one side is convex, the other side is inserted into the auxiliary frame concave. The method according to claim 1, 4 or 5, The needle bar of the power transmission system, characterized in that invading the cable in a live state. In order to measure the voltage, current, power or electrical signal of the cable in the line of the power transmission system, a needle bar is formed in one end, the wire insertion groove in the center and the outside of the center is insulated A coupling part is formed to engage with the member, and the middle part of the one end and the other end is integrally coupled with the first coupling part of the probe body, the probe body consisting of a conductor having a male thread, and the probe body. And a cable support having a guide groove for guiding the cable and a second coupling portion for engaging with the main body support, and the same conductor as the probe body and in the cable support. Is inserted and coupled to the second coupling portion, rotatably with the male screw portion formed in the probe body As a measuring method using a measuring device of the power transmission system including a probe body supporter formed with a female thread to be coupled, Inserting the cable to be measured in the power transmission system into the guide groove of the cable support; Injecting the needle into the cable by the needle moving means; And connecting the connection jack of the wire to the circuit tester. The method of claim 7, wherein And inserting an auxiliary frame having one side convex and the other concave side into the cable guide groove before inserting the cable into the cable guide groove of the cable support. .