JP2685968B2 - Voltage detector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a power detection device arranged in a three-phase electric line and used for detecting a zero-phase current, a zero-phase voltage and the like. .

[Prior Art] As a conventional electric power detecting device of this type, for example, Japanese Patent Laid-Open No. 63-9
As shown in Japanese Patent No. 6568, current, voltage, etc. detecting means is connected to one end of the insulating container, and the signal line extending from the detecting means is housed in the insulating container together with the sensor head and the like, and the signal line is connected to the insulating container. It is known that the signal line, the sensor head, and the like are pulled out from the other end and the insulating container is filled with an insulating material to insulate and enclose the signal line and sensor head.

[Problems to be Solved by the Invention] However, in this conventional power detection device, when the signal line is assembled into the insulating container together with the sensor head and the like, it is difficult to stably hold the signal line, and therefore the signal line is twisted. There is a problem that it may be deformed or caught and may cause a poor connection.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and its purpose is to provide a signal line when the signal line is assembled in an insulating container together with a sensor head or the like. The wire can be held in a stable state without being twisted and deformed or caught, and it is possible to reliably prevent the risk of inadequate connection, and to easily assemble the signal wire. It is to provide a voltage detection device capable of performing the above.

[Means for Solving the Problems] In order to achieve the above-mentioned object, in the invention according to claim 1, a detection means for current, voltage or the like is connected to one end of an insulating container, and a signal of the detection means is connected. The wire is drawn out from the other end of the insulating container, a guide portion extending in the axial direction is provided on the inner surface of the insulating container, and a holder for holding the signal line is movably locked to the guide portion.

Further, in the invention according to claim 2, the signal line is supported by an insulating substrate between the detecting means and the holder, and the insulating substrate is disposed in contact with the end portion of the guide portion.

[Operation] In the electric power detection device configured as described above, the guide portion extending in the axial direction is provided on the inner surface of the insulating container, and the holder holding the signal line is movably locked to the guide portion. Therefore, when the signal line is assembled into the insulating container together with the sensor head, etc., the signal line can be held in a stable state without being twisted and deformed or caught by the holder, which may lead to poor connection. It can be surely prevented. Also, when assembling these signal lines,
Since the holder is moved in the axial direction along the guide portion with the insertion of the signal line into the insulating container, the assembling work can be easily performed.

Further, when the signal line is supported on the insulating substrate between the detecting means and the holder, and the insulating substrate is disposed in contact with the end portion of the guide portion, the insulating substrate serves to connect the signal line to the sensor head or the like. Unnecessary force can be prevented and the connection can be protected. In addition, since the signal line, the sensor head, and the like can be integrally assembled in the insulating container while being supported on the insulating substrate, the assembling work can be further simplified.

[Embodiment] Hereinafter, an embodiment of a power detection device embodying the present invention will be described.
This will be described in detail with reference to the drawings.

As shown in FIG. 1, the detection unit 1 as detection means is hung and supported on an electric wire (not shown) while holding it, and detects a zero-phase current and a zero-phase voltage. The cylindrical insulating container 2 is connected and fixed to the lower surface of the detection unit 1, the insulating outer casing 3 having the insulating folds 3a is fitted on the outer periphery thereof, and the conical cylindrical protective cover 4 is fitted on the lower end thereof. Has been done. As shown in FIG. 1 to FIG. 3, a pair of guide portions 5 composed of two protrusions 5a are provided so as to face both lower halves of the inner surface of the insulating container 2 and are parallel to the axial direction of the insulating container 2. Extends to.

As shown in FIGS. 1 and 2, the insulating substrate 6 is supported in contact with the upper end of the guide portion 5 in the insulating container 2, and a mounting plate 7 is provided upright on the upper surface thereof. The capacitor 8 and the voltage sensor head 9 are attached to the side surface of the attachment plate 7 and are connected to electrodes (not shown) in the detection unit 1 via lead wires 10. Optical fiber signal lines 11 and 12
At the upper end, is connected to the magnetic field sensor head 13 and the voltage sensor head 9 in the detection unit 1, and is pierced and supported by the insulating substrate 6.

As shown in FIGS. 1 and 3, the tension wire 14
Is fixed to the insulating substrate 6 at the upper end, and the signal line 1
They are housed in a protective tube 15 in a state where they are aligned with 1, 12, and they are pulled out from the lower end of the insulating container 2 through a protective cover 4. The holder 16 is attached to the outer periphery of the upper end of the protective tube 15 to hold the signal lines 11 and 12, and is composed of a pair of holding bodies 17 and bolts 18. The pair of locking projections 19 are provided on the outer periphery of the holder 16, and the locking projections 19
By locking 19 to the guide portion 5 in the insulating container 2 so as to be movable in the vertical direction, the rotation of the holder 16 is restricted and twisting deformation of the signal lines 11 and 12 is prevented.

An elastic insulating layer 20 made of urethane rubber or the like and having excellent adhesiveness is formed by filling the lower half of the insulating container 2, and the insulating substrate 6, the holder 16 and the signal lines 11 and 12 are formed in the insulating layer 20. It is included. A high-viscosity insulating fluid 21 made of silicon grease or the like is filled in the upper half of the insulating container 2, and the insulating fluid 21 is filled with a capacitor 8, a voltage sensor head 9 and lead wires 10 and signal wires 12 for them. The connection is submerged.

Next, the operation of the power detection device configured as described above will be described.

Now, in this voltage detecting device, when the voltage sensor head 9 and the signal lines 11 and 12 are assembled in the insulating container 2,
The capacitor 8 and the voltage sensor head 9 are previously mounted on the insulating substrate 6 via the mounting plate 7, and they are connected to the electrodes of the detection unit 1 by the lead wires 10. Further, the end portions of the signal lines 11 and 12 covered with the protective tube 15 are supported by penetrating through the insulating substrate 6, and the magnetic field sensor head 13 and the voltage sensor head 9 are provided.
The end portion of the tension wire 14 is fixed to the insulating substrate 6, and the holder 16 is attached to the outer periphery of the upper end of the protective tube 15.

In this state, the free ends of the signal lines 11 and 12 covered with the protective tube 15 are inserted into the insulating container 2 and the protective cover 4 from the upper end side, and the holder 16 and the insulating substrate 6 are inserted into the insulating container 2. To insert. Then, the locking protrusion 19 of the holder 16 is locked to the guide portion 5 and the insulating substrate 6 is placed in contact with the upper end portion of the guide portion 5, so that the capacitor 8 and the voltage sensor head 9 are placed inside the insulating container 2. Be assembled into.

At the time of this assembly, since the holder 16 holding the signal lines 11 and 12 is movably and non-rotatably locked to the guide portion 5, the signal lines 11 and 12 are not twisted and deformed or caught. , Held stable. Therefore,
It is possible to reliably prevent the possibility of inducing a connection failure due to twisting deformation of the signal lines 11 and 12. Also, at the time of this assembly, as the signal lines 11 and 12 are inserted into the insulating container 2,
Since the holder 16 is moved downward along the guide portion 5 in the axial direction, the assembling work can be easily performed.

Furthermore, in this assembled state, the signal lines 11 and 12 are
Is supported by the insulating substrate 6 between the detection unit 1 and the holder 16, and the insulating substrate 6 is disposed in contact with the upper end of the guide unit 15. Therefore, the external force applied to the signal lines 11 and 12 is applied to the insulating substrate 6. It is possible to prevent unreasonable force from being applied to the connection portions of the signal lines 11 and 12 with respect to the sensor heads 13 and 9 by being received by and to protect the connection portions. Further, when the insulating substrate 6 is provided in this manner, the signal lines 11 and 12, the voltage sensor head 9 and the like can be integrally assembled in the insulating container 2 while being supported by the insulating substrate 6. Therefore, the assembling work can be further simplified.

Note that the present invention is not limited to the configuration of the above-described embodiment, and for example, the guide portion 5 is formed by an axially extending concave groove formed on the inner surface of the insulating container 2, and the like, without departing from the spirit of the present invention. It is also possible to embody by arbitrarily changing the configuration of each part within the range.

[Advantages of the Invention] Since the present invention is configured as described above,
It has the following excellent effects.

(1) According to the invention described in claim 1, since the guide portion extending in the axial direction is provided on the inner surface of the insulating container and the holder for holding the signal line is movably locked to the guide portion, When assembled in an insulating container together with the sensor head, etc., the signal line can be held in a stable state without being twisted and deformed or caught by the holder, and the possibility of inducing poor connection can be reliably prevented. You can
Further, according to this configuration, the holder is moved in the axial direction along the guide portion along with the insertion of the signal line into the insulating container, so that the work of assembling the signal line and the like can be easily performed.

(2) According to the second aspect of the invention, the signal line is supported by the insulating substrate between the detecting means and the holder, and the insulating substrate is arranged in contact with the end of the guide portion. It is possible to prevent unreasonable force from being applied to the connection part of the signal line with respect to and protect the connection part. Since it can be assembled in the insulating container, the assembling work can be further simplified.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing an embodiment of a voltage detection device embodying the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB of FIG. Is. 1 ... Detector as detecting means, 2 ... insulating container, 5 ...
… Guide part, 6… Insulating substrate, 9… Voltage sensor head, 11, 12… Signal line, 16… Holder, 19… Locking protrusion.

Claims (2)

(57) [Claims] 1. A detection means (1) for detecting current, voltage, etc. is connected to one end of an insulating container (2), and the signal lines (11, 12) of the detection means (1) are connected to the insulation container (2). A guide portion (5) extending from the end and extending in the axial direction is provided on the inner surface of the insulating container (2), and the guide portion (5) has a signal line (11,1).
A voltage detection device characterized in that a holder (16) for holding 2) is movably locked. 2. The signal line (11, 12) is supported on an insulating substrate (6) between the detecting means (1) and the holder (16),
The voltage detecting device according to claim 1, wherein the insulating substrate (6) is disposed in contact with an end portion of the guide portion (5).