JP5631579B2 - Charging terminal adapter and charging terminal - Google Patents

Description

  The present invention relates to a power-charging terminal adapter and a power-charging terminal. In particular, the present invention relates to the structure of an adapter and a charging terminal that apply (apply) an exploration signal to a road transformer and connect a distribution line to a charging terminal for accident investigation.

  Generally, a distribution line for transmitting and distributing electric power is supported by a power pole. Moreover, the utility pole supports the pole transformer. And the pole transformer transforms the high voltage electric power applied to the distribution line into a voltage used at home or office.

  Further, in the vicinity of the pole transformer, a cutout (fuse cylinder holder) for electrically connecting the distribution line and the pole transformer is disposed. The cutout holds the fuse cylinder inside. When a current for overload operation flows through the pole transformer, the fuse inside the fuse cylinder is cut off (blown) to prevent the transformer from being burned out.

  By the way, when a ground fault or the like occurs in the distribution line, a direct current as a search signal is applied to a cutout (fuse tube) from a power-applying terminal provided in the survey measuring instrument to search for the fault point. ing. In this case, there has been disclosed a power charging terminal adapter that can shorten the recovery time of a power failure by shortening the search time for an accident (see, for example, Patent Document 1).

  In the power terminal adapter according to Patent Document 1, the fuse cylinder held in the cut-out connected to the distribution line and the pole transformer is not removed, and the main body of the power terminal adapter is attached to the lower end portion thereof. The main body is separable from the cord part to which the exploration signal applied to the distribution line and the pole transformer for accident investigation is supplied, and is relatively rotatable in the attached state with the cord. Yes.

JP 2003-77384 A

  In recent years, electric poles have been removed in the central area of urban areas due to undergroundization of electric wires. And the electric power of the distribution line arrange | positioned underground is transformed with the road transformer installed on the ground, and is used at a house, an office, etc.

  In this road transformer, a main body incorporating the transformer and a cutout are integrated. And the road transformer is comprised so that the front door or side door provided in the road transformer may be opened, and the fuse cylinder may be attached to and detached from the connection hole drilled in the cutout.

  The cutout has a first electrode in the middle of the connection hole into which the fuse cylinder is inserted, and has a second electrode in the back of the connection hole. The first electrode is connected to the middle part of the fuse cylinder and to the distribution line. The second electrode is connected to the tip of the fuse cylinder and to the transformer.

  For example, it is difficult to determine whether it is a ground fault accident on the distribution line or a ground fault on the pole transformer side simply by connecting the charging terminal adapter according to Patent Document 1 to the fuse cylinder. .

  In the case of Patent Document 1, since the distribution line is an overhead line, a direct current is detected by a CT (Current Transformer) installed at a predetermined location of the overhead line, and the ground of the distribution line is determined by the presence or absence of the detection. It is possible to determine whether the fault is a fault or a ground fault on the pole transformer side.

  However, in the case of a road transformer, since the distribution line is an underground line, CT cannot be installed, and it is difficult to detect an accident point of the distribution line using CT. That is, it is difficult for a road transformer to determine whether it is a ground fault accident of a distribution line or a ground fault accident on the transformer side, using the power distribution terminal adapter according to Patent Document 1.

  In a road transformer, if a power distribution terminal adapter and a power distribution terminal that can easily determine whether it is a distribution line ground fault or a transformer ground fault, the target of the accident can be easily identified. It is also possible to speed up the recovery time of a power outage. The above can be said to be the subject of the present invention.

  The present invention has been made in view of such a problem, and it is possible to identify an accident on the distribution line or the transformer side, and it is easy to investigate the distribution line accident. The purpose is to provide a terminal.

  The present inventor replaces the fuse cylinder with a conductor charging terminal adapter inserted into the cutout connection hole to inspect for an accident, and then replaces the tip of the charging terminal adapter with an insulator. Thus, it is found that this problem can be solved by applying an exploration signal to this charging terminal adapter, and based on this, the following new charging terminal adapter and charging terminal for road transformers are as follows: It came to invent.

  (1) The charging terminal adapter according to the present invention is mounted in a main body having a transformer for transforming electric power supplied from an underground line, and a connection hole drilled in the main body, and an intermediate portion is connected to the connection A road transformer comprising a fuse cylinder connected to the underground line via a first electrode provided in the middle of the hole and having a tip connected to the transformer via a second electrode provided at the back of the connection hole. A power connection terminal adapter that is mounted in the connection hole in place of the fuse cylinder, and that receives an exploration signal from the power application terminal, and is detachably coupled to the power application terminal A first conductor rod having a first end connected to the first electrode and a first connection portion connected to the first electrode, and a second conductor coupled coaxially and detachably to the tip end of the first conductor rod. A second portion having a coupling portion at the proximal end portion and a second connection portion connected to the second electrode at the distal end portion. Comprising a body bar has the proximal end of the third coupling portion for removably coupled to the distal end portion coaxially of the first conductor rod, a first insulating bars for insulating said second electrode.

  (2) It is preferable that the second conductor rod is formed of a solid shaft on the base end side and a hollow pipe having an outer diameter smaller than the outer diameter of the shaft rod on the tip end side.

  (3) The power terminal according to the present invention is mounted in a main body having a transformer for transforming electric power supplied from the underground line, and a connection hole of a cutout provided in the main body, and an intermediate portion is the above-mentioned On a road comprising a fuse cylinder that is connected to the underground line via a first electrode provided in the middle of a connection hole, and whose tip is connected to the transformer via a second electrode provided at the back of the connection hole It is used in a transformer, is a charging terminal that is mounted in the connection hole in place of the fuse cylinder, and receives an exploration signal from the charging terminal body, and protrudes from the tip of the charging terminal body A third conductor rod formed at the distal end portion and having the same shape as the base end side of the fuse cylinder, and a distal end portion of the third conductor rod. And a fourth coupling portion that is detachably coupled on the same axis as the base end portion, and the second electrode A fourth conductor rod having a fourth connecting portion at the tip, and formed in the same shape as the tip of the fuse cylinder, and a fourth conductor rod coaxially and detachably coupled to the tip of the third conductor rod And a second insulating rod having a 5 coupling portion at the base end portion, insulating the second electrode, and having the same shape as the tip end side of the fuse cylinder.

  (4) Preferably, the fourth conductor rod is formed of a solid shaft rod on the base end side and a hollow pipe having an outer diameter smaller than the outer diameter of the shaft rod on the tip end side.

  The charging terminal adapter according to the present invention inspects the presence or absence of an accident by inserting a charging terminal adapter composed of a first conductor rod and a second conductor rod into a connection hole and applying power, and then the first conductor. By inserting a charging terminal adapter composed of a rod and a first insulating rod into the connection hole and applying power, an accident on the distribution line or the transformer side can be specified, and it is easy to investigate the distribution line.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the side door type road transformer to which the electrical charging terminal adapter by 1st Embodiment of this invention is applied, FIG. 1 (A) is a top view, figure of a side door type road transformer 1 (B) is a front view of a side door type road transformer. It is a longitudinal cross-sectional view of the cutout with which the said side door type road transformer is equipped. It is a perspective view which shows the external appearance of the fuse cylinder with which the cut-out with which the said side door type road transformer is equipped. It is a perspective exploded view showing composition of a power-applying terminal adapter by a 1st embodiment. It is a top view which shows the structure of the electrical charging terminal adapter by 1st Embodiment, FIG. 5 (A) is the state figure which the 1st conductor rod and the 2nd conductor rod couple | bonded, FIG.5 (B) is the 1st conductor. FIG. 5C is a state diagram before the first conductor rod and the first insulating rod are joined together. It is a perspective exploded view which shows the structure of the electrical charging terminal adapter by the modification of 1st Embodiment. It is a top view which shows the structure of the electricity-charging terminal adapter by the modification of 1st Embodiment, FIG.7 (A) is a state figure which the 1st conductor rod and the 2nd conductor rod couple | bonded, FIG.7 (B) is FIG. 7C is a state diagram in which the first conductor rod and the second conductor rod are separated, and FIG. 7C is a state diagram before the first conductor rod and the first insulating rod are coupled. It is a perspective exploded view showing the composition of the electricity application terminal by a 1st embodiment. It is a perspective exploded view showing the composition of the electric power distribution terminal by the modification of a 1st embodiment. It is a perspective view which shows the external appearance of the fuse cylinder with which the cutout with which the electric power generation terminal adapter by 2nd Embodiment of this invention is applied is equipped with the front door type road transformer. It is a perspective exploded view which shows the structure of the electrical charging terminal adapter by 2nd Embodiment. It is a top view which shows the structure of the electrical charging terminal adapter by 2nd Embodiment, FIG. 12 (A) is the state figure which the 1st conductor rod and the 2nd conductor rod couple | bonded, FIG.12 (B) is the 1st conductor. FIG. 12C is a state diagram before the first conductor rod and the first insulating rod are joined together. FIG. It is a perspective exploded view which shows the structure of the electricity-charging terminal adapter by the modification of 2nd Embodiment. It is a top view which shows the structure of the electricity-charging terminal adapter by the modification of 2nd Embodiment, FIG.14 (A) is a state figure which the 1st conductor rod and the 2nd conductor rod couple | bonded, FIG.14 (B) is FIG. 14C is a state diagram in which the first conductor rod and the second conductor rod are separated, and FIG. 14C is a state diagram before the first conductor rod and the first insulating rod are joined. It is a perspective exploded view which shows the structure of the electrical charging terminal by 2nd Embodiment. It is a perspective exploded view showing the composition of the electric power distribution terminal by the modification of a 2nd embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[First Embodiment]
(Configuration of road transformer)
Initially, the structure of the side door type road transformer to which the power-charging terminal adapter according to the first embodiment of the present invention is applied will be described. FIG. 1 is a diagram showing a configuration of a side door type road transformer to which a power charging terminal adapter according to the first embodiment of the present invention is applied. FIG. 1 (A) is a side view of a side door type road transformer. FIG. 1B is a front view of a side door type road transformer.

  Referring to FIG. 1, the main body 70 of the road transformer 7 accommodates a main body case 72 inside an outer box 71. Insulating oil is injected into the main body case 72 and a transformer 73 is accommodated. Six plug units 74 are attached to the outer wall of the main body case 72. The plug unit 74 hermetically seals the outer wall of the main body case 72.

  Above the plug unit 74, a cylindrical cutout (hereinafter abbreviated as “cutout”) 8 penetrates the main body case 72 in an airtight manner and is attached to the inside of the main body case 72 so as to protrude. Inside the main body case 72, the plug unit 4 and the cutout 8 are electrically connected by a conducting wire 742.

  Further, in the main body case 72, the primary side of the cutout 8 and the transformer 73 is electrically connected by a conducting wire 741. Further, in the main body case 72, the secondary side and secondary side terminals (connectors) 77 of the transformer 73 are electrically connected by a conducting wire 743. The secondary side terminal 77 is connected to a secondary side cable 78 connected to the load.

  A plurality of underground cables 75, which are a plurality of underground cables, are drawn into the road transformer 7. An elbow-type load break connector 76 is attached to the end of the primary cable 75. Some plug units 74 are covered with a cap 7c.

  In the transformer 73, the electric power supplied from the primary side cable 75 is transformed via the cutout 8. The transformed electric power is supplied to the secondary cable 78 via the secondary terminal 77.

  In the illustrated side door type road transformer 7, when one side door 711 is opened, the load break connector 76 can be attached to and detached from the plug unit 74. When one side door 711 is opened, a fuse cylinder (side door fuse cylinder) 81 can be attached to and detached from the cutout 8 (see FIGS. 2 and 3). On the other hand, when the other side door 712 is opened, the secondary cable 78 can be attached to and detached from the secondary terminal 77.

(Composition of cutout)
Next, the structure of the cutout 8 provided in the side door-shaped road transformer 7 will be described. FIG. 2 is a longitudinal sectional view of a cutout provided in the side door type road transformer. FIG. 3 is a perspective view showing an external appearance of a fuse cylinder attached to a cutout provided in the side door type road transformer.

  Referring to FIG. 2 or 3, the cutout 8 includes a cylindrical cutout main body 80 and a fuse cylinder 81. The cutout main body 80 has a substantially circular opening 811 at the base end. The fuse cylinder 81 is inserted from the opening 811 and is installed in a connection hole 810 formed in the cutout body 80.

  Referring to FIG. 2, the cutout main body 80 has a cylindrical insulator 8a that constitutes a substantially outer shell thereof. The cutout body 80 has an insulating cap 8b that protrudes from an intermediate portion of the insulator 8a. And the cutout main body 80 has extended the conducting wire 741 via the insulating cap 8b (refer FIG. 1).

  The conducting wire 741 connects the first electrode e1 to its terminal. The first electrode e1 is disposed in the middle of the connection hole 810. The first electrode e1 is in contact (conductive) with the outer periphery of the intermediate portion of the fuse cylinder 81.

  On the other hand, referring to FIG. 2, the cutout body 80 has an insulating cap 8c that covers the tip of the insulator 8a. And the cutout main body 80 has extended the conducting wire 742 through the insulating cap 8c (refer FIG. 1).

  The conducting wire 742 connects the second electrode e2 to the terminal. The second electrode e <b> 2 is disposed at the back of the connection hole 810. The second electrode e <b> 2 is in contact (conducting) with the tip of the fuse cylinder 81. And the primary side cable 75 and the transformer 73 are electrically connected through the fuse cylinder 81 (refer FIG. 1).

  A hook member 8d is fixed to the base end portion (entrance portion) of the lever 8a. The above-mentioned opening 811 is provided in the hook member 8d. The cutout 8 is closed by attaching a sealing plug 8e to the opening 811. When the sealing plug 8e is removed, the fuse cylinder 81 can be attached to and detached from the connection hole 810.

(Fuse cylinder configuration)
Referring to FIG. 3, the fuse cylinder 81 has a fuse element (not shown) disposed in an insulating cylinder 81a made of heat-resistant synthetic resin or the like. The insulating cylinder 81a is filled with an arc extinguishing agent. One end of the insulating cylinder 81a is sealed with a metal cap 81b.

  A conductive annular first contact terminal 81c is fixed to an intermediate portion of the insulating cylinder 81a. The first contact terminal 81c is connected to one end of the fuse element inside the insulating cylinder 81a. Further, the outer periphery of the first contact terminal 81c can be connected (contacted) to the first electrode e1 (see FIG. 2).

  A conductive pipe-shaped second contact terminal 81d is fixed to the other end of the insulating cylinder 81a. The other end of the insulating cylinder 81a is sealed with a second contact terminal 81d. The second contact terminal 81d is connected to the other end of the fuse element inside the insulating cylinder 81a. The second contact terminal 81d can be connected (contacted) to the second electrode e2 (see FIG. 2). The outer diameter of the second contact terminal 81d is smaller than the outer diameter of the insulating cylinder 81a.

  When an overcurrent exceeding the standard flows through the fuse element, the fuse element is melted and the conduction between the first electrode e1 and the second electrode e2 can be interrupted. The metal cap 81b is provided with a fusing indicator device 81e from which a part of the fused fuse element protrudes (see FIG. 2).

(Configuration of the power charging terminal adapter)
Next, the configuration of the power charging terminal adapter according to the first embodiment of the present invention will be described. FIG. 4 is an exploded perspective view showing the configuration of the power charging terminal adapter according to the first embodiment. FIG. 5 is a plan view showing the configuration of the charging terminal adapter according to the first embodiment. FIG. 5A is a state diagram in which the first conductor rod and the second conductor rod are coupled, and FIG. FIG. 5C is a state diagram before the first conductor rod and the first insulating rod are joined together. FIG.

  Referring to FIG. 4 or FIG. 5, the power distribution terminal adapter (hereinafter abbreviated as “adapter”) 10 according to the first embodiment is mounted in the connection hole 810 instead of the fuse cylinder 81 (see FIG. 2). The adapter 10 is connected to the power application terminal 5, and a direct current as an exploration signal is applied from the power application terminal 5. The adapter 10 includes a first conductor rod 11, a second conductor rod 12, and a first insulating rod 15.

  The first conductor rod 11 is made of a conductive metal round bar, and has a male screw portion 11a serving as a first coupling portion at the base end portion. The male screw portion 11 a can be screwed into the female screw portion 5 a provided at the tip end portion of the charging terminal 5. The first conductor rod 11 can be detachably coupled to the power application terminal 5.

  In addition, the first conductor rod 11 has a first connection portion 111 connected to the first electrode e1 at the tip (see FIG. 2). The first connecting portion 111 is formed with a female screw portion 11b.

  The second conductor rod 12 is made of a conductive metal round rod, and has a male screw portion 12a serving as a second coupling portion at the base end portion. The male screw portion 12 a can be screwed into the female screw portion 11 b provided in the first connecting portion 111. The second conductor rod 12 can be detachably coupled to the first conductor rod 11 on the same axis.

  In addition, the second conductor rod 12 has a second connection portion 121 connected to the second electrode e2 at the tip (see FIG. 2). The second conductor rod 12 is composed of a solid shaft rod on the base end side, and a hollow pipe having an outer diameter smaller than the outer diameter of the shaft rod on the distal end portion side.

  The first insulating rod 15 is made of an insulating synthetic resin round bar, and has a male screw portion 15a serving as a third coupling portion at the base end portion. The male screw portion 15 a can be screwed into the female screw portion 11 b provided in the first connection portion 111. The first insulating rod 15 can be detachably coupled to the first conductor rod 11 on the same axis. The first insulating rod 15 can insulate the second electrode e2 (see FIG. 2).

(Configuration of the charging terminal adapter according to the modification)
Next, the structure of the power charging terminal adapter according to a modification of the first embodiment will be described. FIG. 6 is a perspective exploded view showing a configuration of a power-charging terminal adapter according to a modification of the first embodiment. FIG. 7 is a plan view showing a configuration of a power charging terminal adapter according to a modification of the first embodiment, and FIG. 7A is a state diagram in which the first conductor rod and the second conductor rod are coupled, FIG. FIG. 7B is a state diagram in which the first conductor rod and the second conductor rod are separated, and FIG. 7C is a state diagram before the first conductor rod and the first insulating rod are coupled.

  Note that components having the same reference numerals as those used in FIGS. 4 and 5 have the same operation, and may be omitted in the following description. Referring to FIG. 6 or FIG. 7, the first connection portion 111 is provided with a shaft hole 11c into which the shaft portion 12c or the shaft portion 15c is fitted. The first connecting portion 111 is provided with a pair of hook-shaped engaging grooves 11d and 11e.

  The second conductor rod 12 is made of a conductive metal round rod, and has a second coupling portion 12b coupled to the distal end portion of the first conductor rod 11 at the base end portion. The second coupling portion 12b includes a shaft portion 12c, a pair of pins 12d and 12e, and a fixing ring 12f. The pair of pins 12d and 12e protrude from the outer periphery of the shaft portion 12c. The pair of pins 12d and 12e can be inserted into the pair of engaging grooves 11d and 11e, and the second conductor rod 12 can be further rotated to engage with the first conductor rod 11.

  The fixing ring 12f is screwed to the shaft portion 12c. When the fixing ring 12f is rotated in a state where the pair of pins 12d and 12e are engaged with the pair of engaging grooves 11d and 11e, the second conductor rod 12 can be fastened to the first conductor rod 11. In this manner, the second conductor rod 12 can be detachably coupled to the first conductor rod 11 coaxially using a so-called twist lock mechanism.

  The first insulating rod 15 is made of an insulating synthetic resin round bar, and has a third coupling portion 15 b coupled to the distal end portion of the first conductor rod 11 at the base end portion. The third coupling portion 15b includes a shaft portion 15c, a pair of pins 15d and 15e, and a fixing ring 15f. The pair of pins 15d and 15e protrude from the outer periphery of the shaft portion 15c. The pair of pins 15d and 15e can be inserted into the pair of engaging grooves 11d and 11e, and further, the first insulating rod 15 can be rotated to engage with the first conductor rod 11.

  The fixing ring 15f is screwed to the shaft portion 15c. When the fixing ring 15f is rotated with the pair of pins 15d and 15e engaged with the pair of engagement grooves 11d and 11e, the first insulating rod 15 can be fastened to the first conductor rod 11. Thus, using the twist lock mechanism, the first insulating rod 15 can be detachably coupled coaxially with the first conductor rod 11. The first insulating rod 15 can insulate the second electrode e2 (see FIG. 2).

(Electric power terminal adapter action)
Next, an operation method and an operation of the power charging terminal adapter according to the first embodiment of the present invention and the power charging terminal adapter according to the modification of the first embodiment will be described. With reference to FIG. 1 or FIG. 2, first, the side door 711 is opened, and the fuse cylinder 81 is removed from the cutout body 80.

  Next, with reference to FIG. 4 and FIG. 5 (or FIG. 6 and FIG. 7), in a state where the charging terminal 5 is coupled to the adapter 10 that couples the first conductor rod 11 and the second conductor rod 12, Insert into the connection hole 810 (see FIG. 2). Next, when the power application terminal 5 is applied with electricity, the adapter 10 applies electricity to the primary cable 75 and the transformer 73 via the first electrode e1 and the second electrode e2.

  If there is a reaction in a measuring instrument (not shown), it can be seen that a ground fault has occurred in either the ground wire connected to the primary cable 75, the transformer 73 side, or both.

  Next, with reference to FIG. 4 and FIG. 5 (or FIG. 6 and FIG. 7), in a state in which the power application terminal 5 is coupled to the adapter 10 in which the first conductor rod 11 and the first insulating rod 15 are coupled, Insert into the connection hole 810 (see FIG. 2). Next, when the power application terminal 5 is applied, it is applied from the adapter 10 to the transformer 73 via the first electrode e1.

  In the above case, if there is a reaction in a measuring instrument (not shown), it can be seen that a ground fault has occurred on the transformer 73 side. On the other hand, when there is no reaction in the measuring instrument (not shown), it is understood that a ground fault has occurred in the underground line connected to the primary side cable 75. And an accident point of the underground line is searched by the measuring instrument.

  Thus, the adapter 10 according to the first embodiment inspects the presence or absence of an accident by inserting the adapter 10 including the first conductor rod 11 and the second conductor rod 12 into the connection hole 810 and applying power. In addition, by inserting the adapter 10 composed of the first conductor rod 11 and the first insulating rod 15 into the connection hole 810 and applying power, the underground line or the fault point on the transformer 73 side can be specified. It is easy to investigate accidents.

(Configuration of the charging terminal)
Next, the structure of the power charging terminal according to the first embodiment of the present invention will be described. FIG. 8 is an exploded perspective view showing the configuration of the charging terminal adapter according to the first embodiment.

  Referring to FIG. 8, the power application terminal 100 according to the first embodiment is installed in the connection hole 810 instead of the fuse cylinder 81 (see FIG. 2). The charging terminal 100 includes a charging terminal body 50, a third conductor rod 13, a fourth conductor rod 14, and a second insulating rod 16.

  Referring to FIG. 2, FIG. 3, and FIG. 8, the third conductor bar 13 is made of a conductive metal round bar, and is formed so as to protrude from the distal end portion of the power-charging terminal body 50. Further, the third conductor rod 13 has a third connection portion 131 connected to the first electrode e1 at the tip portion. The third conductor rod 13 is formed in the same shape as the base end side of the fuse cylinder 81. The third connection portion 131 is formed with a female screw portion 13b.

  The 4th conductor bar 14 consists of a conductive metal round bar, and has the external thread part 14a used as a 3rd coupling part in a base end part. The male screw portion 14 a can be screwed into the female screw portion 13 b provided in the third connection portion 131. The fourth conductor rod 14 can be detachably coupled to the third conductor rod 13 on the same axis.

  The fourth conductor rod 14 has a fourth connection portion 141 connected to the second electrode e2 at the distal end portion. The fourth conductor rod 14 is composed of a solid shaft rod on the base end side and a hollow pipe having an outer diameter smaller than the outer diameter of the shaft rod on the tip end side. The fourth conductor rod 14 is formed in the same shape as the tip end side of the fuse cylinder 81.

  The second insulating rod 16 is made of an insulating synthetic resin round bar, and has a male screw portion 16a serving as a fourth coupling portion at the base end portion. The male screw portion 16 a can be screwed into the female screw portion 13 b provided in the third connection portion 131. The second insulating rod 16 can be detachably coupled to the third conductor rod 13 coaxially. The second insulating rod 16 is formed in the same shape as the tip end side of the fuse cylinder 81 excluding the second contact terminal 81d (see FIG. 2).

(Configuration of charging terminal by modification)
Next, the structure of the power charging terminal according to a modification of the first embodiment will be described. FIG. 9 is an exploded perspective view showing a configuration of a power-charging terminal according to a modification of the first embodiment.

  In addition, since the operation | movement of the component of the code | symbol same as the code | symbol used in FIG. 8 is the same, it may omit in the following description. Referring to FIG. 9, the third connecting portion 131 is provided with a shaft hole 13c into which the shaft portion 14c or the shaft portion 16c is fitted. The third connecting portion 131 is provided with a pair of hook-shaped engagement grooves 13d and 13e.

  The fourth conductor rod 14 is made of a conductive metal round bar, and has a fourth coupling portion 14 b that is coupled to the distal end portion of the third conductor rod 13 at the base end portion. The fourth coupling portion 14b includes a shaft portion 14c, a pair of pins 14d and 14e, and a fixing ring 14f. The pair of pins 14d and 14e protrude from the outer periphery of the shaft portion 14c. The pair of pins 14d and 14e can be inserted into the pair of engaging grooves 13d and 13e, and further, the fourth conductor rod 14 can be rotated to engage with the third conductor rod 13.

  The fixing ring 14f is screwed to the shaft portion 14c. When the fixing ring 14f is rotated in a state where the pair of pins 14d and 14e are engaged with the pair of engaging grooves 13d and 13e, the fourth conductor rod 14 can be fastened to the third conductor rod 13. In this way, the fourth conductor rod 14 can be detachably coupled to the third conductor rod 13 coaxially using the twist lock mechanism.

  The second insulating rod 16 is made of an insulating synthetic resin round bar, and has a fifth coupling portion 16 b coupled to the distal end portion of the third conductor rod 13 at the base end portion. The fifth coupling portion 16b includes a shaft portion 16c, a pair of pins 16d and 16e, and a fixing ring 16f. The pair of pins 16d and 16e protrude from the outer periphery of the shaft portion 16c. The pair of pins 16d and 16e can be inserted into the pair of engaging grooves 13d and 13e, and further, the second insulating rod 16 can be rotated to engage with the third conductor rod 13.

  The fixing ring 16f is screwed to the shaft portion 16c. When the fixing ring 16f is rotated with the pair of pins 16d and 16e engaged with the pair of engaging grooves 13d and 13e, the second insulating rod 16 can be fastened to the third conductor rod 13. In this way, the second insulating rod 16 can be detachably coupled to the third conductor rod 13 coaxially using the twist lock mechanism. The second insulating rod 16 is formed in the same shape as the tip end side of the fuse cylinder 81 excluding the second contact terminal 81d (see FIG. 2).

(Effect of the charging terminal)
Next, an operation method and an operation of the charging terminal according to the first embodiment and the charging terminal according to the modification of the first embodiment will be described. With reference to FIG. 1 or FIG. 2, first, the side door 711 is opened, and the fuse cylinder 81 is removed from the cutout body 80.

  Next, referring to FIG. 8 (or FIG. 9), the charging terminal 100 in which the fourth conductor rod 14 is coupled to the third conductor rod 13 provided at the distal end portion of the charging terminal body 50 is inserted into the connection hole 810. (See FIG. 2). Next, when the charging terminal main body 50 is charged, the voltage is applied from the charging terminal 100 to the primary cable 75 and the transformer 73 via the first electrode e1 and the second electrode e2.

  If there is a reaction in a measuring instrument (not shown), it can be seen that a ground fault has occurred in either the ground wire connected to the primary cable 75, the transformer 73 side, or both.

  Next, referring to FIG. 8 (or FIG. 9), the charging terminal 100 in which the second insulating rod 16 is coupled to the third conductor rod 13 is inserted into the connection hole 810 (see FIG. 2). Next, when the charging terminal main body 50 is charged, the voltage is applied from the charging terminal 100 to the transformer 73 via the first electrode e1.

  In the above case, if there is a reaction in a measuring instrument (not shown), it can be seen that a ground fault has occurred on the transformer 73 side. On the other hand, when there is no reaction in the measuring instrument (not shown), it is understood that a ground fault has occurred in the underground line connected to the primary side cable 75. And an accident point of the underground line is searched by the measuring instrument.

  Since the third conductor rod 13 is preliminarily coupled to the tip portion of the electricity-providing terminal body 50, the electricity-providing terminal 100 according to the first embodiment only needs to replace the fourth conductor rod 14 and the second insulating rod 16. There is an advantage that it takes time and effort.

[Second Embodiment]
(Fuse cylinder configuration)
Next, the structure of the fuse cylinder attached to the cut-out provided in the front door type road transformer to which the power-charging terminal adapter according to the second embodiment of the present invention is applied will be described. FIG. 10 is a perspective view showing an external appearance of a fuse cylinder attached to a cut-out provided in a front door type road transformer to which a power application terminal adapter according to a second embodiment of the present invention is applied.

  Referring to FIG. 10, in the fuse cylinder 91, the fuse cylinder 81 has a fuse element (not shown) arranged inside an insulating cylinder 91a made of heat-resistant synthetic resin or the like. The insulating cylinder 91a is filled with an arc extinguishing agent. One end of the insulating cylinder 91a is sealed with a metal cap 91b.

  A conductive annular first contact terminal 91c is fixed to an intermediate portion of the insulating cylinder 91a. The first contact terminal 91c is connected to one end of the fuse element inside the insulating cylinder 91a. Further, the outer periphery of the first contact terminal 91c can be connected (contacted) to a first electrode provided in an intermediate portion of a connection hole of a cutout (not shown).

  A conductive annular second contact terminal 91d is fixed to the other end of the insulating cylinder 91a. The other end of the insulating cylinder 91a is sealed with a second contact terminal 91d. The second contact terminal 91d is connected to the other end of the fuse element inside the insulating cylinder 91a. In addition, the second contact terminal 81d can be connected (contacted) to a second electrode provided at the back of a connection hole of a cutout (not shown). An insulating cap 91e is provided at the tip of the second contact terminal 81d.

  When an overcurrent exceeding the standard flows through the fuse element inside the insulating cylinder 91a, the fuse element is melted and the conduction between the first electrode (ground wire) and the second electrode (transformer) can be cut off.

(Configuration of the power charging terminal adapter)
Next, the configuration of the power charging terminal adapter according to the second embodiment of the present invention will be described. FIG. 11 is an exploded perspective view showing a configuration of a power charging terminal adapter according to the second embodiment. FIG. 12 is a plan view showing the configuration of the charging terminal adapter according to the second embodiment. FIG. 12A is a state diagram in which the first conductor rod and the second conductor rod are coupled, and FIG. FIG. 12C is a state diagram in which the first conductor rod and the second conductor rod are separated, and FIG. 12C is a state diagram before the first conductor rod and the first insulating rod are coupled.

  Referring to FIG. 11 or FIG. 12, the adapter 20 according to the second embodiment is mounted in a connection hole provided in a cutout (not shown) instead of the fuse cylinder 91. The adapter 20 is connected to the power application terminal 6, and a direct current as an exploration signal is applied from the power application terminal 6. The adapter 20 includes a first conductor rod 21, a second conductor rod 22, and a first insulating rod 25.

  The 1st conductor bar 21 consists of a conductive metal round bar, and has the external thread part 21a used as a 1st connection part in a base end part. The male screw portion 21 a can be screwed into the female screw portion 6 a provided at the tip end portion of the power application terminal 6. The first conductor rod 21 can be detachably coupled to the power application terminal 6.

  Further, the first conductor rod 21 has a first connection portion 211 connected to a first electrode (not shown) at the distal end portion. The first connecting portion 211 has a female screw portion 21b.

  The second conductor rod 22 is made of a conductive metal round rod, and has a male screw portion 22a serving as a second coupling portion at the base end portion. The male screw portion 22 a can be screwed into the female screw portion 21 b provided in the first connection portion 211. The second conductor rod 22 can be detachably coupled to the first conductor rod 21 on the same axis.

  Further, the second conductor rod 22 has a second connection portion 221 connected to a second electrode (not shown) at the distal end portion. The second conductor rod 22 is formed of a solid shaft rod, and an insulating cap 222 having the same outer diameter as that of the first connection portion 211 is covered on the tip portion.

  The first insulating rod 25 is made of an insulating synthetic resin round bar, and has a male screw portion 25a serving as a third coupling portion at the base end portion. The male screw portion 25 a can be screwed into the female screw portion 21 b provided in the first connection portion 211. The first insulating rod 25 can be detachably coupled to the first conductor rod 21 on the same axis. And the front-end | tip part of the 1st insulating rod 25 can insulate the 2nd electrode which is not shown in figure.

(Configuration of the charging terminal adapter according to the modification)
Next, the structure of the power charging terminal adapter according to a modification of the second embodiment will be described. FIG. 13 is a perspective exploded view showing a configuration of a power-charging terminal adapter according to a modification of the second embodiment. FIG. 14 is a plan view showing a configuration of a charging terminal adapter according to a modification of the second embodiment, and FIG. 14A is a state diagram in which the first conductor rod and the second conductor rod are coupled, and FIG. FIG. 14B is a state diagram in which the first conductor rod and the second conductor rod are separated, and FIG. 14C is a state diagram before the first conductor rod and the first insulating rod are coupled.

  In addition, since the operation | movement of the component of the code | symbol same as the code | symbol used in FIG.11 and FIG.12 is the same, it may omit in the following description. Referring to FIG. 13 or FIG. 14, the first connection portion 211 is provided with a shaft hole 21c into which the shaft portion 22c or the shaft portion 25c is fitted. The first connecting portion 211 is provided with a pair of hook-shaped engagement grooves 21d and 21e.

  The second conductor rod 22 is made of a conductive metal round rod, and has a second coupling portion 22b coupled to the distal end portion of the first conductor rod 21 at the base end portion. The second coupling portion 22b includes a shaft portion 22c, a pair of pins 22d and 22e, and a fixing ring 22f. The pair of pins 22d and 22e protrude from the outer periphery of the shaft portion 22c. The pair of pins 22d and 22e can be inserted into the pair of engaging grooves 21d and 21e, and the second conductor rod 22 can be further rotated to engage with the first conductor rod 21.

  The fixing ring 22f is screwed to the shaft portion 22c. When the fixing ring 22f is rotated in a state where the pair of pins 22d and 22e are engaged with the pair of engaging grooves 21d and 21e, the second conductor rod 22 can be fastened to the first conductor rod 21. In this way, the second conductor rod 22 can be detachably coupled to the first conductor rod 21 coaxially using the twist lock mechanism.

  The first insulating rod 25 is made of an insulating synthetic resin round bar, and has a third coupling portion 25 b coupled to the distal end portion of the first conductor rod 21 at the base end portion. The third coupling portion 25b includes a shaft portion 25c, a pair of pins 25d and 25e, and a fixing ring 25f. The pair of pins 25d and 25e protrude from the outer periphery of the shaft portion 25c. The pair of pins 25d and 25e can be inserted into the pair of engaging grooves 21d and 21e, and further, the first insulating rod 25 can be rotated to engage with the first conductor rod 21.

  The fixing ring 25f is screwed into the shaft portion 25c. When the fixing ring 25f is rotated with the pair of pins 25d and 25e engaged with the pair of engaging grooves 21d and 21e, the first insulating rod 25 can be fastened to the first conductor rod 21. In this way, the first insulating rod 25 can be detachably coupled to the first conductor rod 21 coaxially using the twist lock mechanism. And the front-end | tip part of the 1st insulating rod 25 can insulate the 2nd electrode which is not shown in figure.

(Electric power terminal adapter action)
Next, an operation method and an operation of the power application terminal adapter according to the second embodiment of the present invention and the power application terminal adapter according to the modification of the second embodiment will be described. First, the front door provided in the front door type road transformer is opened, and the fuse cylinder 91 is removed from the cutout body (see FIG. 10).

  Next, referring to FIG. 11 and FIG. 12 (or FIG. 13 and FIG. 14), it is shown in a state in which the charging terminal 6 is coupled to the adapter 20 in which the first conductor rod 21 and the second conductor rod 22 are coupled. Do not insert into the connection hole. Next, when the power application terminal 6 is applied, power is applied from the adapter 20 to the primary side cable and the transformer side via the first electrode and the second electrode.

  And when there is a reaction in a measuring instrument (not shown), it is understood that a ground fault has occurred on either the underground line connected to the primary cable, the transformer side, or both.

  Next, referring to FIG. 11 and FIG. 12 (or FIG. 13 and FIG. 14), it is illustrated in a state where the power application terminal 6 is coupled to the adapter 20 in which the first conductor rod 21 and the first insulating rod 25 are coupled. Do not insert into the connection hole. Next, when the power application terminal 6 is applied, it is applied from the adapter 20 to the transformer side via the first electrode.

  In the above case, if there is a reaction in a measuring instrument (not shown), it can be seen that a ground fault has occurred on the transformer side. On the other hand, when there is no reaction in a measuring instrument (not shown), it is understood that a ground fault has occurred in the underground line connected to the primary side cable. And an accident point of the underground line is searched by the measuring instrument.

  As described above, the adapter 20 according to the second embodiment inspects the presence or absence of an accident by inserting the adapter 20 including the first conductor rod 21 and the second conductor rod 22 into the connection hole and applying power. By inserting the adapter 20 composed of the first conductor rod 21 and the first insulating rod 25 into the connection hole and applying power, it is possible to identify an accident on the underground line or transformer side related to the front door type road transformer It is easy to conduct accident surveys of underground lines.

(Configuration of the charging terminal)
Next, the configuration of the power application terminal according to the second embodiment of the present invention will be described. FIG. 15 is a perspective exploded view showing a configuration of a power charging terminal according to the second embodiment.

  Referring to FIG. 15, the charging terminal 200 according to the second embodiment is installed in the connection hole instead of the fuse cylinder 91 (see FIG. 10). The charging terminal 200 includes a charging terminal body 60, a third conductor rod 23, a fourth conductor rod 24, and a second insulating rod 26.

  Referring to FIGS. 10 and 15, the third conductor bar 23 is made of a conductive metal round bar and is formed so as to protrude from the distal end portion of the power-charging terminal body 60. Further, the third conductor rod 23 has a third connection portion 231 connected to the first electrode at the tip portion. The third conductor rod 23 is formed in the same shape as the base end side of the fuse cylinder 91. The third connecting portion 231 has a female screw portion 23b.

  The fourth conductor rod 24 is made of a conductive metal round rod, and has a male screw portion 24a serving as a third coupling portion at the base end portion. The male screw portion 24 a can be screwed into a female screw portion 23 b provided in the third connection portion 231. The fourth conductor rod 24 can be detachably coupled to the third conductor rod 23 on the same axis.

  The fourth conductor rod 24 has a fourth connection portion 241 connected to the second electrode at the tip portion. The fourth conductor rod 24 is composed of a solid shaft rod on the proximal end side, and has a larger outer diameter on the distal end portion side than the outer diameter of the shaft rod. In addition, an insulating cap 242 is provided at the tip of the fourth connection portion 241. The fourth conductor rod 24 is formed in the same shape as the tip end side of the fuse cylinder 91.

  The second insulating rod 26 is made of an insulating synthetic resin round bar, and has a male screw portion 16a serving as a fourth coupling portion at the base end portion. The male screw portion 26 a can be screwed into a female screw portion 23 b provided in the third connection portion 231. The second insulating rod 26 can be detachably coupled to the third conductor rod 23 on the same axis. The second insulating rod 26 is formed in the same shape as the tip end side of the fuse cylinder 91.

(Configuration of charging terminal by modification)
Next, a configuration of a power charging terminal according to a modification of the second embodiment will be described. FIG. 16 is an exploded perspective view showing a configuration of a power-charging terminal according to a modification of the second embodiment.

  In addition, since the operation | movement of the component of the code | symbol same as the code | symbol used in FIG. 15 is the same, it may omit in the following description. Referring to FIG. 16, the third connection portion 231 is provided with a shaft hole 23c into which the shaft portion 24c or the shaft portion 26c is fitted. Further, the third connection portion 231 is provided with a pair of hook-shaped engagement grooves 23d and 23e.

  The fourth conductor rod 24 is made of a conductive metal round rod, and has a fourth coupling portion 24b coupled to the distal end portion of the third conductor rod 23 at the base end portion. The fourth coupling portion 24b includes a shaft portion 24c, a pair of pins 24d and 24e, and a fixing ring 24f. The pair of pins 24d and 24e protrude from the outer periphery of the shaft portion 24c. The pair of pins 24d and 24e can be inserted into the pair of engaging grooves 23d and 23e, and the fourth conductor rod 24 can be rotated to engage with the third conductor rod 23.

  The fixing ring 24f is screwed to the shaft portion 24c. When the fixing ring 24f is rotated in a state where the pair of pins 24d and 24e are engaged with the pair of engaging grooves 23d and 23e, the fourth conductor rod 24 can be fastened to the third conductor rod 23. As described above, the fourth conductor rod 24 can be detachably coupled to the third conductor rod 23 on the same axis by using the twist lock mechanism. The second insulating rod 26 is formed in the same shape as the tip end side of the fuse cylinder 91 (see FIG. 10).

(Effect of the charging terminal)
Next, an operation method and an operation of the charging terminal according to the second embodiment and the charging terminal according to a modification of the second embodiment will be described. First, the front door provided in the front door type road transformer is opened, and the fuse cylinder 91 is removed from the cutout body (see FIG. 10).

  Next, referring to FIG. 15 (or FIG. 16), the charging terminal 200 in which the fourth conductor rod 24 is coupled to the third conductor rod 23 provided at the distal end portion of the charging terminal body 60 is inserted into the connection hole. . Next, when the charging terminal main body 60 is charged, power is applied from the charging terminal 200 to the primary cable and the transformer side via the first electrode and the second electrode.

  And when there is a reaction in a measuring instrument (not shown), it is understood that a ground fault has occurred on either the underground line connected to the primary cable, the transformer side, or both.

  Next, referring to FIG. 15 (or FIG. 16), the charging terminal 200 in which the second insulating rod 26 is coupled to the third conductor rod 23 is inserted into the connection hole. Next, when the charging terminal main body 60 is charged, the voltage is applied from the charging terminal 200 to the transformer side via the first electrode.

  In the above case, if there is a reaction in a measuring instrument (not shown), it can be seen that a ground fault has occurred on the transformer side. On the other hand, when there is no reaction in a measuring instrument (not shown), it is understood that a ground fault has occurred in the underground line connected to the primary side cable. And an accident point of the underground line is searched by the measuring instrument.

  In the charging terminal 200 according to the second embodiment, the third conductor rod 23 is pre-coupled to the tip of the charging terminal main body 60, so that the labor required to replace the fourth conductor rod 24 and the second insulating rod 26 is reduced. There is a merit that it is sufficient.

5 Electricity terminal 7 Road transformer 8 Cutout 10 Adapter (electricity terminal adapter)
11 First conductor rod 11a Male thread part (first coupling part)
12 Second conductor rod 12a Male thread part (second coupling part)
15 1st insulation rod 15a Male thread part (3rd coupling part)
70 Main Body 73 Transformer 81 Fuse Tube 111 First Connection Portion 121 Second Connection Portion 810 Connection Hole e1 First Electrode e2 Second Electrode

Claims (6)

A main body having a transformer for transforming electric power supplied from the underground line, and a first electrode provided in a connection hole of a cutout provided in the main body and having an intermediate portion provided in the middle of the connection hole Is used for a road transformer having a fuse cylinder connected to the transformer via a second electrode provided at the back of the connection hole, and connected to the underground line via A charging terminal adapter that is attached to the connection hole and receives an exploration signal from the charging terminal,
A first conductor rod having a first coupling portion detachably coupled to the power application terminal at a base end portion and a first connection portion connected to the first electrode at a distal end portion;
A second conductor rod having a second coupling portion detachably coupled coaxially with the distal end portion of the first conductor rod at the proximal end portion and a second connection portion connected to the second electrode at the distal end portion; ,
A power transmission terminal for a road transformer , comprising a third coupling portion that is detachably coupled coaxially with a distal end portion of the first conductor rod, and a first insulating rod that insulates the second electrode. adapter. 2. The electric power transmission terminal for a road transformer according to claim 1, wherein the second conductor rod is formed of a solid shaft rod on the base end side and a hollow pipe having an outer diameter smaller than the outer diameter of the shaft rod on the distal end portion side. adapter. A main body having a transformer for transforming electric power supplied from the underground line, and a first electrode provided in a connection hole of a cutout provided in the main body and having an intermediate portion provided in the middle of the connection hole Is used for a road transformer having a fuse cylinder connected to the transformer via a second electrode provided at the back of the connection hole, and connected to the underground line via A power terminal that is attached to the connection hole and receives an exploration signal from the power terminal body,
A third connection portion is formed so as to protrude from the distal end portion of the power charging terminal main body, has a third connection portion connected to the first electrode at the distal end portion, and is formed in the same shape as the proximal end side of the fuse cylinder. A conductor rod;
The fuse member has a fourth coupling portion at the proximal end portion that is detachably coupled coaxially with the distal end portion of the third conductor rod, and has a fourth connection portion connected to the second electrode at the distal end portion. A fourth conductor rod formed in the same shape as the tip end side of
The base end portion has a fifth coupling portion that is detachably coupled coaxially with the tip end portion of the third conductor rod, insulates the second electrode, and is formed in the same shape as the tip end side of the fuse cylinder. street transformer for Division collector terminal comprising: a second insulating rod, a. The road transformer charging terminal according to claim 3, wherein the fourth conductor rod is formed of a solid shaft rod on the base end side and a hollow pipe having an outer diameter smaller than the outer diameter of the shaft rod on the tip end side. . Using the road transformer terminal adapter for road transformer according to claim 1 or 2, a power transformer charging method for a road transformer for inspecting the presence of the ground wire or the ground fault on the transformer side,
In a state in which the charging terminal is connected to the charging terminal adapter in which the first conductor rod and the second conductor rod are combined, the charging terminal adapter is inserted into the connection hole, and the charging terminal is charged. And the 1st process of inspecting the presence or absence of the ground fault on the underground line or the transformer side,
In a state in which the charging terminal is connected to the charging terminal adapter in which the first conductor rod and the first insulating rod are combined, the charging terminal adapter is inserted into the connection hole, and the charging terminal is charged. And the 2nd process which test | inspects the presence or absence of the ground fault of the said underground line, The electric power charging method for road transformers including. Using the road transformer charging terminal according to claim 3 or 4, a road transformer power charging method for inspecting for the presence of a ground fault on the underground line or the transformer side,
In a state where the third conductor rod and the fourth conductor rod are coupled, the power-charging terminal is inserted into the connection hole, the power-charging terminal body is charged, and the underground line or the transformer side A first step for inspecting for the presence of a ground fault;
In the state where the third conductor rod and the second insulating rod are coupled, the power-charging terminal is inserted into the connection hole, the power-charging terminal main body is charged, and there is a ground fault of the underground wire A second step of inspecting the electric power for the road transformer.

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