JPH0351874Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a switch for high-voltage distribution lines that can easily connect a bypass cable in a bypass cable construction method.

[Conventional technology]

When constructing high-voltage distribution lines, if so-called shutdown work is carried out by cutting off the electricity, consumers will suffer unexpected damage due to the multipurpose use of electricity these days. To avoid this, an uninterruptible construction method was developed that allows construction to be carried out without shutting off the electricity. Among these uninterruptible construction methods, the so-called bypass cable construction method using bypass equipment is such that a bypass cable is stretched over the part of the high-voltage line where construction is to be performed, and the electricity is switched to this bypass cable, thereby cutting off the electricity only to the part to be worked on. , which transmits electricity from the bypass cable to the consumer. In order to connect both ends of the bypass cable to high-voltage lines, bypass construction switches are provided, and these switches are closed to allow electricity to flow through the bypass cable.

[Problem that the invention attempts to solve]

As shown in Figures 7A and B, this bypass construction switch is installed separately from the general switch, and the bypass wire (A) is connected to one end of the bypass construction switch (B). It is necessary to connect the insulated wire to the wire, and the work of stripping and connecting the insulated wire involves live wire work, which is time consuming and poses a safety problem. Naturally, it was also necessary to secure a place to install the switch for bypass construction, and the mounting of the pillars was complicated, detracting from the aesthetics.

[Means to solve the problem]

Therefore, this invention provides one switch with two sets of high-voltage line connection terminals and two sets of bypass cable connection terminals, and a fixed contact electrically connected to each of the above-mentioned sets of high-voltage line connection terminals. , a movable contact electrically connected to each of the other sets of high-voltage line connection terminals and freely connectable to each of these fixed contacts, and each of the above two sets of high-voltage line connection terminals and each of the above-mentioned bypass cable connection terminals. are electrically connected to each other.

[Effect]

By connecting the bypass cable to the switch and operating the movable contact, the high voltage line opens and electricity flows through the bypass cable. Bypass cable connection becomes extremely quick and easy.

〔Example〕

An embodiment of this invention will be described below with reference to the drawings.
1 to 4 show a first embodiment of this invention, in which bushings 2 for each of the three phases are vertically arranged and penetrated and fixed on both sides of the switch main body 1, and each bushing 2 on both sides The inner ends of the bushings 2 in the switch main body 1 are opposed to each other, and each bushing 2 is provided with a high voltage line connection terminal 3. Also, each of these bushings 2
Bushings 4 for bypass cables for each of the three phases are penetrated and fixed on both sides of the switch main body 1 on the lateral side of the switch body 1, and each bypass cable bushing 4 is provided with a bypass cable connection terminal 5. A bus bar 6 is connected between the in-phase high-voltage line connection terminal 3 and the bypass cable connection terminal 5 on both sides of the switch main body 1 . Further, a fixed contact 7 is provided at one end of the bus bar 6 of each phase on one side, respectively.
A shaft 8 rotatably supported within the switch main body 1 has movable contacts 9 for each phase at intervals in the longitudinal direction.
is provided. This movable contact 9 and the bus bar 6 of each phase on the other side where the fixed contact 7 is not provided.
A flexible conductor 10 of each phase is connected between the two. An opening/closing handle 11 that interlocks with this shaft 8 is rotatably provided on the front side of the switch main body 1. By moving this opening/closing handle 11, the shaft 8 rotates, and the movable contacts 9 of each of the three phases are rotated. It comes into contact with or separates from each fixed contact of the same phase. Further, a recess 12 having a semicircular cross section for abutting against a utility pole is vertically provided on the rear side surface of the switch main body 1, and support hooks 13 for attaching to a utility pole or the like are provided on both sides of the recess 12.

In addition, 14 in the figure is a stopper of the opening/closing handle 11.

In the case of this embodiment, the high voltage line connection terminals 3 in the bushings 2, 2 of each of the three phases on both sides of the switch 15,
The ends of the high voltage lines 16a and 16b of each of the three phases are connected respectively, and the switch 15 of this invention is installed on the high voltage line 16 as shown in FIG. 5A, and the fixed contact 7 of the switch 15 is normally connected to the movable contact. 9 are in contact and are in a closed circuit state. And now, across this switch 15, the fifth
The high-voltage line 16b on the right side in Figure A is one end of the construction section, and the bypass cable 16b is located in this construction section.
7, bypass cable 17 for each of the three phases.
The end is connected to the bypass cable terminal 5 of one of the three phases of this invention. And opening/closing handle 11
to open the switch 15. In this way, as shown in FIG. 5B, the bypass cable 17 is energized from the left high voltage line 16a, and the construction work is carried out while supplying electricity to customers in the construction section.

〔effect〕

As described above, in this invention, in addition to the high-voltage line connection terminal, a bypass cable connection terminal is provided in advance, and this terminal and one high-voltage line connection terminal are connected or can be freely connected. When using the construction method, power can be transmitted from the high-voltage line to the bypass cable by simply connecting the bypass cable to the bypass cable connection terminal above and opening the switch.
Compared to conventional bypass cable connection work, the connection can be made extremely easily and quickly, and the workability of the bypass cable construction method itself is improved.

[Brief explanation of drawings]

Figure 1 is a front view of the first embodiment of this invention, Figure 2 is a side view, Figure 3 is a bottom view, Figure 4 is an enlarged cross-sectional view, and Figures 5A and B are respectively A schematic diagram showing the procedure for connecting a bypass cable using the first embodiment of this invention, FIG. 6 is a schematic diagram showing a bypass cable connected to a high voltage line using the switch of the first embodiment of this invention, FIGS. 7A and 7B are schematic diagrams showing conventional examples in which a bypass cable is connected to a high voltage line, respectively. In the figure, 1 is the switch main body, 2 is the bushing, and 3 is the switch body.
is a terminal for connecting a high voltage line, 4 is a bushing for a bypass cable, 5 is a terminal for connecting a bypass cable, 6 is a terminal for connecting a bypass cable.
is a bus bar, 7 is a fixed contact, 9 is a movable contact, 15
is a switch.

Claims (1)

[Scope of utility model registration request] Two sets of high-voltage line connection terminals that connect the high-voltage lines of each of the three phases, respectively, are provided facing each other on the switch body, and are electrically connected to one set of these high-voltage line connection terminals. A fixed contact and a movable contact electrically connected to each of the other sets of high voltage line connection terminals and freely connectable to each of these fixed contacts are provided, and each of the above two sets of high voltage line connection terminals of the switch main body is provided. A high-voltage switch characterized in that two sets of bypass cable connection terminals each consisting of three phases are provided beside the terminals, respectively, and are electrically connected to these terminals.