JP2016085940A - Cutout device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutout device that eliminates the necessity of a high lift work vehicle and thus shortens work time, and reduces a difference in work time attributable to a worker's skill, when adjusting a tap of a pole transformer or replacing pole transformers.SOLUTION: A cutout device supports a drop wire 211 and an aerial wire 210 connected to a pole transformer at an upper side of the pole transformer installed on an electric pole, and electrically connects between the drop wire 211 and the aerial wire 210 or electrically cut out between the drop wire 211 and the aerial wire 210 to ground and short-circuit the drop wire 211.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cutout device.

  It is known that an underline pulled down from a distribution line is connected to a primary side (high voltage side) of a pole transformer installed on a utility pole via a retaining insulator (for example, Patent Document 1). .

  FIG. 8 is a perspective view showing a state in which the underline is connected to the pole transformer installed in the utility pole. For convenience of explanation, the pole transformer is assumed to be a single-phase three-wire type.

  The pole transformer 101 is mounted on a mounting table 104 installed on a brace 103 that extends horizontally from the utility pole 102, and is fixed at a predetermined height position on the utility pole 102 using a binding band 105. The three-phase distribution line 106 is installed on an armor 107 extending horizontally from the utility pole 102 via a lever 108. The two underlines 109 corresponding to the distribution lines 106 of any two phases (for example, R phase and S phase) of the three phases are fixed to the brace 110 extending horizontally across the brace 107. The upper retaining insulator 111 and the two lower retaining insulators 113 fixed to the arm metal 112 that crosses the arm metal 103 and extends horizontally are pulled down. At the position of the upper retaining insulator 111, the two underlines 109 are electrically connected to the two branch lines 114 branched from the R-phase and S-phase distribution lines 106. The cut-out switch 115 is fixed to the arm metal 112 together with the lower retaining insulator 113, and connects the underline 109 retained by the lower retaining insulator 113 to the primary side of the pole transformer 101. It has a function of connecting or disconnecting the electric circuit between the primary side of the device 101.

JP2013-141364A

  When performing tap adjustment of the pole transformer 101 according to the load connected to the secondary side (low voltage side) of the pole transformer 101 or the increase / decrease of the distributed power source, the cutout switch 115 is opened to lower the bottom insulator. The electric circuit between 113 and the primary side of pole transformer 101 is interrupted. In this case, since the voltage from the distribution line 106 is generated in the underline 109 between the upper detainer insulator 111 and the lower detainer insulator 113 on the upstream side of the cutout switch 115, the operator can use the high pressure rubber. Tap adjustment was performed after wearing gloves and attaching a grounding short-circuit device to the primary side of the pole transformer 101. However, since the work of attaching the grounding short circuit device to the primary side of the pole transformer 101 is a power outage work performed in accordance with the live work, the burden on the worker increases and the work time becomes longer. There is a problem that the working time varies greatly according to the skill of the worker.

  In addition, when the existing pole transformer 101 is suspended by another pole transformer, the branch line 114 between the distribution line 106 and the upper retaining insulator 111 is cut using an indirect hot wire tool (for example, a hot stick). To do. And after confirming that the electric circuit from the upper retaining insulator 111 to the pole transformer 101 had a power failure, the operator removed the binding band 105 and suspended it with another pole transformer. However, since the work for cutting the branch line 114 is an indirect live line work and requires many dedicated tools, if an aerial work vehicle cannot be used, the work efficiency is reduced and the burden on the worker is increased. In addition to a long working time, there is a problem that the working time varies greatly depending on the skill of the worker.

  An object of this invention is to provide the cutout apparatus which solves the said problem.

  The main present invention that solves the above-mentioned problem is to support an underline and an overhead line connected to the pole transformer above the pole transformer installed on the utility pole, and to provide the underline and the overhead line. The cutout device is characterized by electrically connecting between the underline and the overhead line, and short-circuiting the underline while shortly grounding the underline.

  Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  According to the present invention, when performing tap adjustment and suspension change of the pole transformer, (1) an aerial work vehicle is not required, (2) work time is shortened, and (3) the operator's skill is increased. The effect that the difference of the working time resulting from it becomes small is acquired.

It is a perspective view which shows an example at the time of installing the cutout apparatus which concerns on this embodiment in a utility pole. It is a figure which shows an example of the cutout apparatus which concerns on this embodiment. It is a top view which shows an example at the time of fixing the cutout apparatus which concerns on this embodiment to a bracelet. It is a perspective view which shows an example at the time of fixing the cutout apparatus which concerns on this embodiment to a bracelet. It is a figure which shows the state by which the electrically conductive instrument was mounted | worn with the cutout apparatus which concerns on this embodiment. It is a figure which shows the state from which the electrically conductive instrument was removed from the cutout apparatus which concerns on this embodiment. It is a figure which shows the state by which the earthing | grounding short circuit instrument was mounted | worn with the cutout apparatus which concerns on this embodiment. It is a figure which shows the state by which the earthing | grounding short circuit instrument was removed from the cutout apparatus which concerns on this embodiment. It is a perspective view which shows a mode that the underline is connected with respect to the pole top transformer installed in the utility pole.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

=== Installation example of cutout device ===
FIG. 1 is a perspective view showing an example when the cutout device according to the present embodiment is installed on a utility pole. For convenience of explanation, the pole transformer 201 is a three-phase single wire type.

  The pole transformer 201 is mounted on a mounting table 204 installed on a brace 203 extending horizontally from the utility pole 202, and is fixed at a predetermined height position on the utility pole 202 using a binding band 205. The three-phase distribution line 206 is installed on a brace 207 extending horizontally from the utility pole 202 via a lever 208. Two cutout switches 209 (cutout devices) having a characteristic function in the present embodiment are provided corresponding to the distribution line 206 of any two phases (for example, R phase and S phase) of the three phases. Yes. The cut-out switch 209 is fixed to the surface on the power pole 202 side of the arm metal 215 that extends horizontally across the arm metal 207 at the tip of the arm metal 207. The cutout switch 209 supports the branch line 210 and the underline 211 that are branched from the R-phase and S-phase distribution lines 206, and electrically connects the branch line 210 and the underline 211, or In addition, it has a function of cutting off the underline 211 by grounding the branch line 210 and the underline 211. A specific description of the cutout switch 209 will be described later. Two underline 211 are provided corresponding to the cut-out switch 209. The two underlines 211 are between the two cutout switches 209 and the two retaining levers 213 fixed to the arm metal 212 extending horizontally across the arm metal 203 at the tip of the arm metal 203. It has been pulled down and pulled down. The cutout switch 214 is fixed to the armature 212 together with the retaining insulator 213, connects the underline 211 held by the retaining insulator 213 to the primary side of the pole transformer 201, and connects the retaining insulator 213 and the pole transformer 201. It has a function to connect or cut off the electric circuit between the primary side. The cutout switch 214 also has a function as a fuse that blows when a current of a certain level or more flows.

=== Cutout device ===
FIG. 2 is a diagram illustrating an example of a cutout device according to the present embodiment.

  The cutout switch 209 is formed using a porcelain member (insulating member), for example, in the same manner as an insulator in consideration of factors such as insulation, weather resistance, and mechanical strength. The cutout switch 209 is formed by integrating a cutout portion 209A and a retaining portion 209B.

  The cut-out portion 209A has a hollow shape having an opening 209C on the lower side, and has an elongated attachment / detachment hole 209D for inserting / removing a conductive device or a ground / short-circuit device through the opening 209C. In addition, the specific description of the conductive instrument and the grounding / shorting instrument will be described later. Further, the cut-out portion 209A includes a support portion 209E that supports the branch line 210, and a terminal 209F that is electrically connected to the branch line 210 through the support portion 209E and is exposed and protrudes to the inner peripheral surface side of the attachment / detachment hole 209D. And have. Further, the cut-out portion 209A has a terminal 209G that is electrically connected to the underline 211 on the side opposite to the terminal 209F of the attachment / detachment hole 209D and is exposed and protruded to the inner peripheral surface side of the attachment / detachment hole 209D. ing.

  The retention portion 209B includes a support portion 209H that is electrically connected to the terminal 209G, and a retention groove 209I that is formed so that a constant tension is applied to the underline 211. The electric wire connected to the support portion 209H is electrically connected to the underline 211.

  FIG. 3A is a plan view showing an example when the cutout device according to the present embodiment is fixed to a bracelet, and FIG. 3B is a perspective view showing an example when the cutout device according to the present embodiment is fixed to a bracelet. is there.

  A groove 209J for fixing the cutout switch 209 to the arm metal 215 is provided on the outer peripheral surface of the cutout portion 209A. The groove 209J has a certain width in the vertical direction and is provided in the horizontal direction.

  The fixing bracket 216 is a bracket that connects the cutout switch 209 and the arm metal 215. The fixing fitting 216 is formed integrally with a fixing portion 216A coupled to the groove 209J of the cutout switch 209 and a fixing portion 216B coupled to the arm metal 215. The fixing portion 216A has a ring shape having a width equal to that of the groove 209J in the vertical direction and a diameter enough to fit the outer peripheral surface of the cutout switch 209. Both ends 216C and 216D of the fixed portion 216A protrude toward the outside of the fixed portion 216A through a gap, and have holes 216E through which the bolts 217 are inserted. The fixing portion 216 </ b> B has a flat plate shape that is inserted inside the U-shaped armband 215. The fixing portion 216B has a hole 216F through which the bolt 218 is inserted. The arm metal 215 has a hole 215A through which the bolt 218 is inserted.

  First, the fixing portion 216A is fitted into the cutout switch 209, and the nut 219 is screwed into the bolt 217 inserted through the hole 216E at a position where the inner peripheral surface of the fixing portion 216A having a ring shape faces the groove 209J. When the bolt 217 and the nut 219 are tightened in the direction in which the gap between the both ends 216C and 216D is reduced, the fixing portion 216A comes into close contact with the groove 209J as the diameter of the fixing portion 216A decreases, and the fixing portion 216A Coupled to cutout switch 209. Next, the fixing portion 216B is inserted inside the arm metal 215, and the nut 220 is screwed into the bolt 218 inserted from the lower hole 215A of the arm metal 215 toward the hole 216F of the fixing portion 216B. A nut 221 is screwed into the tip of a bolt 218 inserted through the upper hole 215A of the arm metal 215. When the bolt 218 and the nuts 220 and 221 are tightened, the fixing portion 216B is coupled to the arm metal 215. In this way, the cutout switch 209 is fixed to the surface of the arm bracket 215 on the power pole 202 side.

=== Conductive appliances ===
With reference to FIG. 2, an example of the electrically conductive instrument with which the cutout apparatus which concerns on this embodiment is mounted | worn is demonstrated.

  The conductive tool 301 is a tool that is attached to the attachment / detachment hole 209D through the opening 209C when electrically connecting the branch line 210 and the underline 211. For example, the conductive device 301 has a shape that is crimped to the attachment / detachment hole 209D so as not to fall out of the opening 209C when attached to the attachment / detachment hole 209D, or is attached to the attachment / detachment hole 209D. It has a shape that catches on the inner peripheral surface of 209D. The conductive instrument 301 is formed by integrating a conductive portion 301A and an insulating portion 301B. The conductive portion 301A is a long metal member having no fuse function. When the conductive tool 301 is mounted in the attachment / detachment hole 209D, the conductive portion 301A comes into contact with the terminals 209F and 209G to electrically connect the branch line 210 and the underline 211. The insulating part 301B has a notch groove 301C. When the conductive tool 301 is inserted into and removed from the attachment / detachment hole 209D using an indirect hot wire tool (for example, a hot stick), a connecting pin for connecting the insulating portion 301B and the indirect hot wire tool to the notch groove 301C. 301D is attached, and the tip of the indirect live tool is mounted in the pin hole 301E of the connecting pin 301D.

=== Grounding short circuit device ===
With reference to FIG. 2, an example of the ground short-circuit instrument with which the cutout apparatus which concerns on this embodiment is mounted | worn is demonstrated.

  The grounding short circuit device 401 is a device that is attached to the attachment / detachment hole 209 </ b> D through the opening 209 </ b> C when electrically disconnecting the branch line 210 and the underline 211. The grounding short-circuiting device 401 has, for example, a shape that is crimped to the attachment / detachment hole 209D or the attachment / detachment hole so that it does not fall out of the opening 209C when attached to the attachment / detachment hole 209D. After being attached to 209D, it has a shape that is hooked on the inner peripheral surface of the attachment / detachment hole 209D. In the present embodiment, it is assumed that the outer shapes of the conductive device 301 and the ground short-circuit device 401 are the same. The grounding short circuit device 401 is formed by integrating an insulating portion 401A and a conductive portion 401B. The insulating portion 401A is a long member. When the grounding / short-circuiting device 401 is mounted in the attachment / detachment hole 209D, the insulating portion 401A is interposed between the terminals 209F and 209G and blocks the electric circuit between the branch line 210 and the down line 211. The conductive portion 401B is a metal member that comes into contact with the terminal 209G when the grounding short circuit device 401 is mounted in the attachment / detachment hole 209D and is grounded. That is, when the grounding / shorting device 401 is mounted in the attachment / detachment hole 209D, the conductive portion 401B contacts the terminal 209G to short-circuit the underline 211. For example, the conductive portion 401B is attached so as to be integrated with the periphery of the insulating portion 401A at a position facing the terminal 209G. The insulating portion 401A has a notch groove 401C on the lower side with the conductive portion 401B as a boundary. When the grounding / shorting device 401 is inserted into and removed from the attachment / detachment hole 209D using an indirect hot wire tool, a connecting pin 401D for connecting the insulating portion 401A and the indirect hot wire tool is attached to the notch groove 401C. The tip of the indirect hot wire tool is mounted in the pin hole 401E of the connecting pin 401D.

=== Example of operation of the cutout device ===
FIG. 4 is a diagram illustrating a state in which a conductive instrument is mounted on the cutout device according to the present embodiment. FIG. 5 is a diagram illustrating a state where the conductive tool is removed from the cutout device according to the present embodiment. FIG. 6 is a diagram illustrating a state in which a grounding short-circuiting instrument is attached to the cutout device according to the present embodiment. FIG. 7 is a diagram illustrating a state in which the grounding short-circuit apparatus has been removed from the cutout device according to the present embodiment.

  First, the conductive tool 301 is mounted in the attachment / detachment hole 209D of the cutout switch 209, and the branch line 210 and the underline 211 are electrically connected (FIG. 4).

  Next, depending on the load connected to the secondary side (low voltage side) of the pole transformer 201 or the increase or decrease of the distributed power supply, tap adjustment of the pole transformer 201 or another pole from the pole transformer 201 is performed. When performing work such as suspension to the upper transformer, the conductive tool 301 is removed from the attachment / detachment hole 209D of the cutout switch 209, and the electric circuit between the branch line 210 and the pull-down line 211 is interrupted (FIG. 5). . Subsequently, the grounding short circuit device 401 is mounted in the attachment / detachment hole 209D of the cutout switch 209, and the underline 211 is grounded through the conductive portion 401B while being electrically disconnected between the branch line 210 and the underline 211. (FIG. 6). When the cutout switch 209 is in the state shown in FIG. 5 as described above, the underline 211 installed on the lower side of the cutout switch 209 surely causes a power failure. Accordingly, it is possible to efficiently perform operations such as tap adjustment and suspension change of the pole transformer 201.

  Next, when the operations such as tapping and suspending the pole transformer 201 are completed, the grounding short circuit device 401 is removed from the attachment / detachment hole 209D of the cutout switch 209 (FIG. 7), and the conductive device 301 is removed from the cutout switch 209. Is attached to the attachment / detachment hole 209D (FIG. 4).

  As described above, the cutout switch 209 according to the present embodiment branches from the underline 211 and the distribution line 206 connected to the pole transformer 201 above the pole transformer 201 installed on the utility pole 202. Supporting the branch line 210 and electrically connecting the underline 211 and the branch line 210, or electrically disconnecting the underline 211 and the branch line 210 and Short to ground. According to the present embodiment, the underline 211 installed on the lower side of the cut-out switch 209 ensures a power failure over the entire area, and therefore, work such as tap adjustment and suspension change of the pole transformer is efficiently performed. It becomes possible to do.

  In addition, the cutout switch 209 according to the present embodiment supports the drawing portion 209B that supports the underline 211, the branch line 210, and electrically connects the underline 211 and the branch line 210, or A cutout portion 209A that electrically cuts between the underline 211 and the branch line 210 and short-circuits the underline 211 to the ground, and the retaining portion 209B and the cutout portion 209A have insulating properties, weather resistance, It is integrally formed using a porcelain member having excellent mechanical strength. According to the present embodiment, the cutout switch 209 can be replaced with an existing retaining insulator (high-pressure pin insulator).

  Further, in the cutout switch 209 according to the present embodiment, the cutout portion 209A includes a conductive tool 301 that electrically connects the underline 211 and the branch line 210, and a space between the underline 211 and the branch line 210. And a grounding / short-circuiting device 401 for electrically disconnecting the underline 211 and short-circuiting the underline 211 to the ground are provided with an attaching / detaching hole 209D. According to the present embodiment, by simply removing the conductive tool 301 from the attachment / detachment hole 209D and attaching the grounding short-circuiting instrument 401 to the attachment / detachment hole 209D, the underline 211 installed on the lower side of the cutout switch 209 can be obtained. Since the power outage is ensured throughout, when working on tap adjustment of the pole transformer 201 or suspension, the work vehicle is shortened and the work time is shortened (the power outage time of the customer is reduced). And the difference in work time due to the skill of the worker can be reduced.

  In addition, in the cutout switch 209 according to the present embodiment, the attachment / detachment hole 209D is a hole formed so that the conductive device 301 and the grounding / shorting device 401 are inserted / removed from the lower side of the cutout portion 209A.

  In the cutout switch 209 according to the present embodiment, the cutout portion 209A is fixed to the arm bracket 215 so that the attachment / detachment hole 209D faces downward.

  In the cutout switch 209 according to the present embodiment, the conductive instrument 301 is a conductive member including a fuse that blows when a current of a certain level or more flows.

  Further, in the cutout switch 209 according to the present embodiment, the grounding short circuit device 401 includes an insulating portion 401A that electrically cuts off the underline 211 and the branch line 210 when attached to the attachment / detachment hole 209D, and the underline Suppose that it is a metal member which has the electroconductive part 401B which earth-shorts 211.

  In addition, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

201 pole transformer 202 power pole 203, 207, 208, 212 arm bracket 204 mounting base 205 binding band 206 distribution line 209 cutout switch 209A cutout part 209B draw part 209C opening 209D attaching / detaching hole 209E support part 209F, 209G terminal 210 branching Line 211 Underline 301 Conductive instrument 301A Conductive part 301B Insulating part 401 Grounding short circuit instrument 401A Insulating part 401B Conductive part

The main present invention that solves the above-described problems is that, above the pole transformer installed on the utility pole, above the pole transformer , the retaining portion that supports the underline connected to the pole transformer, and , to support the overhead line to be connected to the pole transformer, or electrical connection between the overhead line and the pull-down lines, or, electrically cut off between the overhead line and the pull-down line A cutout device for grounding and shorting the underline, and the drawing portion and the cutout portion are integrally formed using an insulating member .

Claims (7)

  Above the pole transformer installed on the utility pole, supporting the underline and the overhead line connected to the pole transformer, and electrically connecting the underline and the overhead line, or A cutout device characterized in that the underline and the overhead line are electrically disconnected and the underline is short-circuited to the ground. A retaining portion for supporting the underline;
A cutout that supports the overhead line and electrically connects the underline and the overhead line, or electrically disconnects the underline and the overhead line to short-circuit the underline. And comprising
The cutout device according to claim 1, wherein the retention portion and the cutout portion are integrally formed using an insulating member. The cutout unit includes a first device that electrically connects the underline and the overhead line, and a first device that electrically disconnects the underline and the overhead line and short-circuits the underline to the ground. The cutout device according to claim 2, further comprising an attachment / detachment hole through which the two instruments are selectively attached / detached. The cut-out apparatus according to claim 3, wherein the attachment / detachment hole is a hole formed so that the first instrument and the second instrument are inserted and removed from below the cut-out part. The cutout device according to any one of claims 2 to 4, wherein the cutout portion is fixed to a brace of the utility pole so that the attachment / detachment hole faces downward. The cutout device according to any one of claims 3 to 5, wherein the first instrument is a conductive member including a fuse that blows when a current of a certain level or more flows. The second instrument is a member having an insulating part that electrically cuts off the underline and the overhead line and a conductive part that grounds and shorts the underline when mounted on the attachment / detachment hole. The cutout device according to any one of claims 3 to 6, wherein:

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