JPH0915269A - Electric impression indicator - Google Patents

Abstract

PURPOSE: To improve the judging accuracy for judging the presence/absence of any electric impression by checking the presence or absence of this electric impression of a distribution line in a remote place or not, and reducing any environment effect such as a narrow part or the like. CONSTITUTION: This device is provided with a rectifying element 21 to be connected to a detection electrode 13, two amplifying means 24A and 24B to be connected to this rectifying element 21 by way of an insulating lead wire 22, and two lighting indication means 25A and 25B being connected to the amplifying means 24A, 24B, and lighting in time of impressing the amplified voltage respectively, through which electric detection information is transmitted to a remote place for lighting indication.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging indicator device,
In particular, the present invention relates to a technique that makes it easy to determine whether or not a power distribution line is energized.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a structure in which an electric cable (for example, a high-voltage underground cable) 2 and a high-electricity device 3 are connected by a detachable branch connector (for example, a load break elbow) 1. The detachable branch connector 1 is separable into a detachable portion A and a fixed portion B, an L-shaped electric conductor 11, and an insulating portion 12 that covers the electric conductor 11.
A part of the surface is buried in the insulating part 12 so as to be exposed to the outside, and is attached to the electric conductor 11 so as to always cover the detection electrode 13 in an electrostatically coupled state and the exposed part of the detection electrode 13. And a cap 14.

As a technique for determining whether or not the power distribution line having such a detachable branch connector 1 is being charged (whether or not it is in a live state), a cap 14 is removed and a neon lamp type is used. It is effective to bring the tip of the electroscope into contact with the detection electrode 13 and determine whether the neon lamp is turned on or not. When the ground voltage: E is applied to the electric conductor 11, the detection electrode 13 and the ground portion 15 shown in FIG.
The potential difference (applied voltage): e between the electric conductor 1 and the electric conductor 1 is assumed to be infinite, assuming that the impedance of the detector is infinite.
1 and the capacitance between the detection electrode 13: a C _1, the capacitance between the sensing electrode 13 and the ground portion 15: Based on the C _2, obtained by the following equation. e = E {C ₁ / (C ₁ + C ₂ )}

[0004]

However, when the voltage is detected by the voltage detector, the work of removing the cap 14 is accompanied,
If the installation environment of the detachable branch connector 1 is a narrow space or the like, the workability is impaired, and the worker needs to carry or prepare a voltage detector in advance. In addition, in a work environment such as in a narrow space, there remains a problem such as deterioration in the confirmation of the marking of the voltage detector.

[0005] The present invention has been made in view of the above-mentioned circumstances, and achieves the following objects. Check if electricity is being applied to the distribution line at a remote location. To reduce the impact of the environment such as narrow spaces. Improve the accuracy of determining the presence or absence of charging. Whether or not electricity is applied can be implemented at any time.

[0006]

When a detection electrode in an electrostatically coupled state with respect to an electric conductor is embedded in an insulating portion such as an electric cable or a detachable branch connector, the electric connection is made by connecting the detection electrode. A device for indicating whether or not a conductor is in a charged state, a rectifying element connected to a detection electrode, an insulating lead wire connected to the rectifying element, and a DC voltage connected to the insulating lead wire. The technique is provided that includes an amplifying unit that amplifies the LED and a lighting indicator that is connected to the amplifying unit and that lights up when an amplified voltage is applied. As the lighting display means,
A light emitting element or the like having a large amount of light is applied. As a means for increasing the amount of light, a plurality of amplifying means are applied. In this case, a technique is applied in which a ground conductor is arranged around the detection electrode, and a cap that supports an insulating lead wire is attached to the ground conductor. A technique is applied in which an outer conductor is arranged on the insulating lead wire, a cap is formed of a conductive material, and is connected to the outer conductor of the insulating lead wire. In the lighting indicator means, a check means for supplying a marking current is arranged in place of the amplifying means, and an electric circuit and a switch for lighting the lighting indicator means are added as the checking means.

[0007]

When the electric conductor is in the charged state, the divided potential is applied to the detection electrode in the electrostatically coupled state with respect to the electric conductor. The divided potential is rectified by the rectifying element and transmitted to the amplifying means at a remote place via the insulating lead wire, and the amplified marking activates the lighting marking means to perform lighting marking. Therefore, the lighting indication is given only when the electric conductor is in the power-on state. The light quantity of the lighting indicator means is set to be large by using a light emitting element such as a light emitting diode, a lamp, or the like, or by performing multistage amplification. A ground conductor and an outer conductor are arranged around the detection electrode and the insulating lead wire, and the insulating lead wire is supported by a cap, and the cap is made of a conductive material to prevent the detection electrode from grounding. The capacitance is set, and the partial voltage potential of the detection electrode is stably obtained. By adding the checking means to the lighting marking means and supplying the marking current, it is possible to determine whether or not the soundness of the lighting marking is maintained.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the electricity application marking device according to the present invention will be described below with reference to FIGS. In each figure, reference numeral 20 is a charging indicator, C is a marking unit, 21 is a rectifying element, 22 is an insulating lead wire, 23 is a power supply (DC power supply), 24A and 24B are amplifying means, and 25A and 25B are lighting. Marking means and 26 are checking means.

As shown in FIG. 1, the voltage application marking device 20 includes a detection electrode 13 which is electrostatically coupled to the electric conductor 11 in the insulating portion 12 of the detachable branch connector 1 or the like as described above.
When the electric conductor 11 is buried, it is connected to the detection electrode 13 to indicate whether or not the electric conductor 11 is in a charged state. The rectifying element 21 and the insulating lead wire 2
2, marking portion C, power supply (DC power supply) 23, amplification means 24
A, 24B, lighting indicating means 25A, 25B, check means 26, a capacitor 27 and a series resistor 28 are used.

In the example of FIG. 1, the cap 14
Is formed of a conductive material such as conductive rubber, and is attached to the support flange 1a of the detachable branch connector 1 in an externally fitted state and electrically connected to the ground portion 15 of the detachable branch connector 1. Are electrically connected to each other, and also support the insulated lead wire 22 and are electrically connected to the outer conductor 22a thereof.

In the rectifying element 21, as shown in FIG. 1, the detecting electrode 13 and the cap 14 are connected to each other, and the detecting electrode 13 and the central conductor 2 of the insulating lead wire 22 are connected to each other.
2b and the rectifying direction are arranged according to the connection state.

In the insulated lead wire 22, the rectifying element 21 and the marking portion C are connected to each other, and for example, a suitable remote place apart from the installation location of the detachable branch connector 1 and having favorable environmental conditions is monitored. It is extended to the room and monitoring panel.

The marking portion C is connected to the end of the insulated lead wire 22, and is connected to the power source 23 such as a DC power source composed of a battery and the detection electrode 13 when it is activated by turning on the power switch 23a. An amplifying means 24 for amplifying a DC voltage generated based on the pressure, a lighting indicating means 25 connected to the amplifying means 24 and turned on when an amplified voltage is applied, and an indicating means 25 for supplying an indicating current from a power source 23. And a check means 26 for activating

Transistor elements are used as the amplifying means 24A and 24B, and the amplifying means 24A shown in FIG.
In this case, it has the ability to amplify the DC voltage transmitted by the center conductor 22b and supply the marking current for operating the lighting marking means 25A. In the amplifying means 24B shown in FIG. When the direct current voltage from the conductor 22b is 0, the lighting indicating means 25B is operated, and these amplifying means 24A and 24B amplify in multiple stages as necessary as shown in FIGS. 2 and 3. Is applied.

As the lighting indicating means 25A, a light emitting diode, a small lamp, or the like having a large light quantity and for indicating a charged state of red or the like for urging attention or caution is applied, and the lighting indicating means 25B is used. The ones that indicate the non-energized state (no voltage state) such as green, green, etc. are applied.
In the example, they are arranged in parallel.

In the checking means 26, instead of the amplifying means 24A, the lighting indicating means 25A is operated at any time to make the lighting indicating, and the amplifying means 24A, 2A are provided.
4B and a switch arranged in parallel with each other, a capacitor 27 for controlling the operating voltage of the lighting indicating means 25A and a positive potential are applied to the amplifying means 24A by the checking means 26 to turn on the lighting indicating means 25A. A series resistor 28 for lighting is connected in series.

In the voltage application marking device having such a configuration, when the detachable branch connector 1 is energized to bring the electric conductor 11 into the electric power-applied state, the detection electrode 13 which is electrostatically coupled to the electric conductor 11 is provided. Since the partial potential of the rectifying element 2 is applied,
The DC voltage rectified by 1 is transmitted to the marking portion C arranged at a remote place via the insulating lead wire 22.

The DC voltage value at this time is determined by the voltage division based on the electrostatic capacitance value between the electric conductor 11, the detection electrode 13, and the ground portion 15, as described in the example of FIG.
The resistance value between the detection electrode 13 and the ground portion 15 and the rectifying element 2
Although it is set by the internal resistance of 1 or the like, the grounding conductor (grounding part) 15 and the outer conductor 22a are arranged around the detection electrode 13 and the insulating lead wire 22, and the cap 14 is a conductor and is an insulating lead wire. If it is supported so as to suppress the movement of 22, the ground portion 15 of the detection electrode 13 that generates a partial pressure is generated.
The electrostatic capacitance and the impedance with respect to are set to be constant without changing, and the divided potential of the detection electrode 13 can be stably obtained.

Therefore, when it is necessary to confirm whether or not the detachable branch connection body 1 is charged with electricity, if the amplifying means 24A and 24B are activated by turning on the power switch 23a, voltage division and rectification are performed. The DC voltage based on this is amplified, the potential at point P in FIG.
A marking current is supplied from 3 to the lighting marking means 25A,
At this time, the light is turned on to indicate the applied state.

When the electric conductor 11 is not energized (non-energized), the potential at the point P in FIG. The means 25A does not light up, but instead the amplifying means 24B is in an operating state, and the lighting indicating means 25B indicates a non-voltage state.

On the other hand, if the check means 26 is turned "ON" at any time, the potential at the point P in FIG. 1 becomes "positive" when the insulation between the outer conductor 22a and the center conductor 22b is good. A marking current corresponding to the series resistor 28 is supplied to the lighting marking means 25A to light. In this case, the lighting indicator 25B does not light up, and the power source 2
It is possible to determine whether or not the soundness of both 3 and the lighting indicator 25A is maintained.

[Other Embodiments] The present invention includes the following techniques. a) The electric conductor 11 is a portion of a distribution line such as the electric cable 2 to which electricity is applied, and the detection electrode 13 is arranged on the insulating portion 12 thereof. b) Place the grounding portion 15 in the marking portion C. c) The marking section C is to perform marking only in the applied state.

[0023]

EFFECTS OF THE INVENTION The charging indicator according to the present invention includes a rectifying element connected to a detection electrode, an amplifying means connected to the rectifying element via an insulating lead wire, and a connecting means to the amplifying means. Since it is configured to include a lighting indicator that lights up when the amplified voltage is applied, the following effects are achieved. (1) The detection information can be transmitted to a desired remote place by the length of the insulated lead wire, and the presence or absence of electricity application can be confirmed at any time. (2) By separating the lighting marking portion from the installation position of the detection electrode, it is possible to reduce the influence of the environment such as the narrow space and improve the confirmability of the presence or absence of electricity application. (3) By applying a lighting indicator having a large light quantity and arranging a plurality of amplifying means, it is possible to improve the accuracy of determining whether or not the electricity is applied. (4) By connecting the insulated lead wire while being supported by the cap, it is possible to eliminate the work such as removing the cap,
It is possible to reduce the labor required for power detection work. (5) By adding the checking means to the lighting marking means, it is possible to confirm whether or not the marking function maintains soundness.

[Brief description of the drawings]

FIG. 1 is a connection diagram showing an embodiment of a charging indicator according to the present invention.

FIG. 2 is a connection diagram showing a connection example of amplification means in FIG.

FIG. 3 is a connection diagram showing another connection example of the amplification means of FIG.

FIG. 4 is a front cross-sectional view showing a connection structure example of an electric cable and a high-electrical device by a detachable branch connector.

5 is a schematic diagram showing a potential difference generated in the detection electrode in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Detachable branch connection body 2 Electric cable 3 High electric equipment 11 Electric conductor 12 Insulating part 13 Detection electrode 14 Cap 15 Grounding part (grounding conductor) 20 Electricity marking device 21 Rectifying element 22 Insulation lead wire 22a Outer conductor 23 Power source (DC Power supply) 24A, 24B Amplifying means 25A, 25B Lighting indicating means 26 Checking means C Marking section

Claims (4)

[Claims] 1. An electric conductor (1) embedded in an insulating part (12) such as an electric cable (2) or a detachable branch connector (1).
A charging indicator device (20) for connecting to a detection electrode (13) in an electrostatically coupled state with respect to 1) and for indicating whether or not an electric conductor is in a charging state. A rectifying element (21) connected to the rectifying element, an insulating lead wire (22) connected to the rectifying element, an amplifying means (24A) connected to the insulating lead wire and amplifying a DC voltage, and connected to the amplifying means. A lighting indicator device (25A) which is turned on when an amplified voltage is applied. 2. A ground conductor (1) around the detection electrode (13).
5. The electricity application marking device according to claim 1, wherein 5) is arranged and a cap (14) supporting the insulated lead wire (22) is attached to the ground conductor. 3. The insulated conductor (22) is connected to the outer conductor (22).
3. A voltage marking device according to claim 2, characterized in that a) is arranged, the cap (14) is made of a conductive material and is connected to the outer conductor of the insulated lead wire. 4. The lighting indicator means (25A) is provided with a check means (26) for supplying an indicator current instead of the amplifying means (24A). Voltage indicator device.