JPH0514423Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to a multi-circuit switch attached to a utility pole.

(Prior art) Conventionally, ground-mounted multi-circuit switches can be installed in places where the sidewalk area is wide, but in places where it is not possible to install them on the road due to reasons such as narrow sidewalk areas, this multi-circuit switch cannot be used.

Therefore, when it is not possible to install a multi-circuit switch on the ground, it has been necessary to arrange a plurality of single switches on a conventional type of pole. However, when a plurality of switches are used in this manner, the distribution cables are routed around the pole-mounted switches in a congested manner, resulting in a problem in that the space occupied by the pole-mounted equipment increases.

Therefore, in order to reduce the space occupied by the equipment and to consolidate the switches, it is conceivable to mount the ground-mounted multi-circuit switches as they are on a pole.

However, as shown in Japanese Patent Application No. 60-97540, the above-mentioned ground-mounted multi-circuit switch has a switch section in which multiple circuit switches are arranged in the middle stage of the case, and a switch section in which multiple circuit switches are arranged in the upper stage. The multi-circuit switch is large in size and is not suitable for installation on utility poles, as it has a mechanical part that opens and closes each circuit switch, and a cable connection part to which the power supply side and load side connection cables are connected at the bottom. It was hot.

(Problem that the invention attempts to solve) As mentioned above, this invention attempts to solve the problem that it is large and unsuitable for mounting on utility poles, and its purpose is to reduce weight and make it more compact. The object of the present invention is to provide a multi-circuit switch suitable for installation on a utility pole.

Structure of the invention (means for solving the problem) In order to achieve the above object, this invention provides a plurality of circuit breakers inside a case that can be mounted on a column, and connects each phase of each circuit breaker to the inside of a case that can be mounted on a column. The opening/closing parts of the case are arranged so that they are lined up on almost the same plane when viewed from one side of the case, and bushings to which various cables are connected are placed on the opening/closing part of each phase on the one side of the case and the opposite side. An operating member is provided correspondingly, and is further provided outside the case at a position spaced apart from the case, and operatively connected to each circuit breaker to open and close each circuit breaker. It is.

(Function) Therefore, by providing the operating members separately on the outside of the case and providing bushings for connecting various cables on the side of the case, the case can be used to install multiple circuit breakers within the case. Since all that is required is a space, the overall structure is compact and the weight of the case is reduced. In addition, the opening/closing parts of each phase of each circuit switch inside the case are arranged parallel to each other on almost one plane, so the space inside the case is effectively used and the space is made compact, which is useful for making connections outside the case. cables are arranged in an orderly manner without congestion.

(Embodiment) A first embodiment of this invention will be described in detail below with reference to FIGS. 1 to 5. Although a three-phase rotary switch is used in this embodiment, the configuration inside the switch is the same for the three phases U, V, and W.
In this embodiment, only the configuration of the U phase will be mainly explained.

Reference numeral 1 denotes a case in which a plurality of circuit breakers are housed, and as shown in FIG. 2, the case is attached to a utility pole 4 as a columnar part via a mounting bracket 2 and a mounting band 3 provided on the rear surface. . In particular, as shown in FIG. 3, this case 1 includes a pair of left and right side plates 5, a top plate 6 that closes both upper and lower ends of these side plates 5, and a bottom plate 7.
Protective rods 9 are attached to the outer surfaces of both side plates 5 via brackets 8, respectively.

10, 11, and 12 are especially as shown in FIG.
Three lever holding devices are arranged below the utility pole 4, and are attached to one end of each of operating levers 13, 14, 15 as operating members rotatably attached to these holding devices 10, 11, 12. Pivotally mounted elevating rings 16, 17, and 18 extend along the utility pole 4 toward the back side of the case 1.

As shown in FIG. 3, reference numeral 19 denotes five bushings that are arranged facing each other in three stages, upper and lower, with respect to the side plates 5 of the case 1, and in the inner half of these bushings, the support part 20 is located inside the case 1. At the same time, the mounting portion 21 protrudes outside the case 1 in the outer half. The bushings 19 are attached to the upper and lower tiers of the left side plate 5 of the case 1, and to the upper, middle, and lower tiers of the right side plate 5, and the flange portions 22 are attached to the outer surface of the side plate 5 via bolts 23 via fasteners 22a.
It is fixed to the case 1 by being fastened. Also, the pair of upper and lower bushings 19 attached to the left side plate 5 of the case 1 have their center line C-
C is arranged to be shifted upward by d from the center line C'-C' of the bushings 19 attached to the upper and lower parts of the right side plate 5, respectively. Note that a mounting bracket 2 is provided on the inner surface of the center portion of the left side plate 5 of the case 1.
A support insulator 29 is attached with a bolt 30 via a bolt 30, and is disposed diagonally opposite to the bushing 19 at a position slightly above the bushing 19 in the middle row on the right side so as to be lower toward the tip.

Here, to briefly describe the cables connected to each bushing 19, the bushing 19 arranged at the lower level on the left side plate 5 of the case 1 connects to the power supply via the connecting elbow 24 fitted in the mounting part 21. The bushing 19 disposed on the upper stage is also connected to a transformer connection cable 27a for a low voltage consumer on the load side via a connection elbow 26. Further, a main cable 27b on the load side is connected to the lower stage of the right side plate 5 of the case 1, and branch cables 27c for high voltage consumers on the load side are connected to the upper and middle stages. As specifically shown in Figure 5, the connection state of the cables described above consists of circuit breakers R1, R2, and R3 for three circuits: upper, middle, and lower, and the switching parts for each phase of each circuit are as follows: As shown in FIG. 4, the same phases are arranged vertically.

31 is on the inner surface of the right side plate 5 of the case 1,
This is a current transformer provided around the upper and center bushings 19 for detecting fault current. Reference numeral 32 denotes a connection terminal provided at the outer end of the bushing 19, and a conductor rod 32a extends inward from this connection terminal 32. Reference numeral 33 denotes a support fitting fixed to the inner end of the conductor rod 32, and a fixed electrode 34 is fixed with a bolt 34a. Reference numeral 35 denotes an arc extinguishing chamber whose one end is fixed to the support fitting 33, and the case 1
It is arranged downward on the right side and upward on the left side.

Reference numeral 36 denotes a fixing metal fitting with bolts 37 attached to the inner end of the support insulator 29, the upper end of which is electrically connected to the upper bushing 19 via the upper connecting conductor 38, and the lower end connected to the lower connecting conductor 39. 40 bolts are attached to the base end of the lower bushing 1.
It is electrically connected to 9. Reference numeral 41 denotes a support fitting attached to the upper end extension portion 39a of the lower connector 39, to which the fixed electrode 34 is fixed with a bolt 42.

Reference numeral 45 denotes a movable insulator constituting the opening/closing part of the rotary switch R as a circuit breaker installed between each pair of bushings 19 facing each other in the case 1 (between the bushing 19 and the support insulator 29 in the middle stage). And, as shown in Figure 4,
The U, V, and W phases are supported so as to be integrally rotatable.

The specific structure of the movable insulator 45 will be explained with reference to FIG. 4. Reference numerals 46 and 47 designate a pair of mounting plates provided at both front and rear ends, respectively, and 48 and 49 designate a pair of rotating shafts that protrude outward from each of the mounting plates 46 and 47 and are rotatably supported by the case 1. 50,51
is between the mounting plates 46 and 47 and the rotating shafts 48 and 49.
(same as the rotation axis O of the movable contact blade 53, which will be described later).
Movable insulators 45 for U-phase, V-phase, and W-phase are respectively attached through the insulators.

Reference numeral 52 is a driven lever fixed on one of the rotating shafts 49, 48, and is connected to a display pointer or the like. Further, the other rotation shaft 48 has the lifting link 1
By operating the operating levers 13, 14, 15, the movable insulator 45 is rotated to perform on/off operation, and this on/off state is turned on/off. It is as shown by the opening/cutting mark D on the surface of the case 1 shown in FIG.

Next, the movable insulator 45 supported by the support rods 50 and 51 will be explained with reference to FIG.

Reference numeral 53 denotes a pair of movable contact blades made of a conductive material and formed into a substantially S-shape as a whole, and a fixed electrode 34 is located on the rotation locus of these blades. The movable insulator 45 has the center portions of the pair of movable contact blades 53 inserted and fixed in a predetermined position in the mold,
It is integrally molded by injecting epoxy resin into this mold, and the center part has a fixed shape that is located on the same plane as the plane passing through the rotation axis O and at a constant angle from the rotation axis O. A pair of insertion holes 54 are provided through the holes parallel to each other with an interval therebetween, so that the pair of support rods 50 and 51 can be inserted therethrough. Incidentally, insulating folds 55 are integrally formed at both ends of the movable insulator 45 to improve withstand voltage characteristics between different phases, and as shown by two-dot chain lines in FIG. At W, the movable contact blades 53 of the upper and lower movable insulators 45 are positioned so that their ends do not interfere with each other.

Further, a ground barrier 5 is provided on the inner surface of the top plate 6 and the bottom plate 7 of the case 1 through support fittings 56, respectively.
7,58 are installed, and three phases U,
An interphase barrier 59 is provided between the V and W movable insulators 45. Note that even in the same phase, it is possible to provide an insulating barrier between the upper, middle, and lower movable insulators 45.

Now, the operation of the pole-mounted multi-circuit switch constructed as described above will be explained below.

In FIG. 3, both movable contact blades 53 of the lower movable insulator 45 are in contact with the fixed electrode 34. Therefore, the main cable 25 on the power supply side and the main cable 27 on the load side connected to the right lower bushing 19
b is in a energized state. Further, the current flowing from the main line 25 of the power supply side cable passes through the conductor rod 32 in the bushing 19 at the lower left stage, and then also flows through the lower connecting conductor 39 to the fixed electrode 34 at the middle stage at the left. Since the middle movable insulator 45 is in a closed circuit state,
The current also flows in the right middle bushing 19, and flows to the branch cable 27c for the high-voltage consumer on the load side.

The current flowing to the lower connection conductor 39 is connected to the fixing metal fitting 3.
6 and the upper connection conductor 38 into the right upper bushing 19. Since the upper movable insulator 45 is in an open state, current flows only to the transformer connection cable 27a for the low-voltage consumer on the load side connected to the bushing 19 on the left upper stage.

To close the upper movable insulator 45, the operating lever 13 is rotated in one direction, and the link movement of the elevating rod 16 and the driven lever 52 causes
The movable insulator 45 is rotated in the direction of closing the circuit. Then,
Both movable contact blades 53 rotate by a certain amount, these movable contact blades 53 contact the fixed electrode 34, energization is started, and the branch cable for the high voltage consumer on the load side is connected via the upper right bushing 19. 27c, and the cut-off display D is changed from OFF to ON as shown by the two-dot chain line in FIG.

Further, in order to open the lower and middle movable insulators 45, the operating levers 14 and 15 are rotated in the other direction, contrary to the above, to rotate the movable insulators 45 in the opening direction. Then, since both movable contact blades 53 are separated from the fixed electrode 34, the circuit is opened.

By appropriately selecting the operation of the above-described operation levers 13, 14, and 15, it is possible to send current to any of the load side cables 27a to 27c.

In this embodiment, since the support insulator 29 is attached obliquely to the case 1, the amount of protrusion into the case 1 is reduced compared to when it is attached horizontally.
In addition, since the support insulator 29 is provided above the opposing bushing 19, the distance between the fixed electrodes 34 of the support insulator 29 and the bushing 19 can be set shorter than the entire length of the movable contact blade 53. Become.

Further, in this embodiment, the operating levers 13, 1
4 and 15 on the outside of the case 1, and the bushing 19 is provided on the side plate 5 of the case 1, the case 1 only needs space for installing the rotary switch R within the case 1, so that the entire case 1 is The case 1 is formed compactly and the weight of the case 1 is reduced. Moreover,
Since the rotary switches R inside the case 1 are arranged side by side on almost the same plane, the space inside the case 1 is effectively used, which further contributes to compactness, and the cable 2 to be connected outside the case 1 is
5, 27a, 27b, and 27c are arranged in an orderly manner without congestion.

Furthermore, since the three upper and lower movable insulators 45 are arranged in the same phase, no short circuit occurs. Therefore, it is sufficient to arrange the movable insulator 45 at a position where the movable contact blades 53 do not interfere with each other, and the height of the case 1 can be set low.

Further, by providing an interphase barrier 59 between different phases, short circuits between different phases are prevented from occurring.

Next, a second embodiment of this invention will be described with reference to FIGS. 6 and 7.

In this embodiment, three two-point breakers R as circuit breakers for one phase U (V or W) are arranged in the same stage in the case 1, and these are arranged in three upper and lower stages. Therefore, it is a three-phase switch for U, V, and W.

As shown in FIG. 7, each two-point opener R includes a plurality of pairs of fixed bushings 19a facing each other in the width direction of the case 1, and these fixed bushings 19.
Movable bushing 1 rotatably provided between a.
9b are vertically opposed to each other as shown in FIG.
3. The movable contact blade 53 of the movable bushing 19b is brought into contact with and separated from the fixed electrode 34 of the fixed bushing 19a to open and close it.

Even with this configuration, the effect is no different from the first embodiment.

Note that this invention is not limited to the above-mentioned embodiments, and changes may be made without departing from the spirit of the invention, such as setting the switch R to any number of stages, 2 or more instead of 3 stages. It is possible.

Effects of the invention As detailed above, this invention provides the operating members separately on the outside of the case, as well as the bushings for connecting various cables on the side of the case. Since all that is needed is space for installing the circuit breakers, the overall structure can be made compact and the weight of the case can be reduced.In addition, the opening and closing parts of each phase of each circuit switch in the case are almost the same for each phase. Since they are arranged side by side on a flat surface, the space inside the case is used effectively, further contributing to compactness, and outside the case, the connected cables can be arranged neatly for each phase without congestion, making it easier to connect cables. It becomes easy to judge the circuit voltage component and the phase of each circuit. Therefore, installation on a pole such as a utility pole and multi-circuit branching on the pole are facilitated, and the excellent effect of contributing to urban beautification is achieved.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the first embodiment of this invention, Fig. 2 is a side view thereof, Fig. 3 is an enlarged sectional view showing the state inside the case, and Fig. 4 shows a three-phase movable insulator. A perspective view, FIG. 5 is an explanatory diagram showing a circuit of a multi-circuit switch, and FIGS. 6 and 7 are a sectional view and a plan view, respectively, showing the embodiment of FIG. 2. Case...1, Utility pole as a pillar part...4, Operation lever as an operating member...13, 14, 1
5. Bushing...19. Power supply side main cable as a cable...25, Transformer connection cable...27a, Load side main cable...27b,
Branch cable...27c, movable insulator constituting the opening/closing part, rotary switch as a circuit breaker, and two-point opening/closing switch...R.

Claims (1)

[Scope of utility model registration request] A plurality of circuit breakers are provided inside a case that can be mounted on a pillar, and the opening/closing parts of each phase of these circuit breakers are arranged on almost the same plane when viewed from one side of the case. Bushings to which various cables are connected are provided on the one side and the other side opposite thereto, corresponding to the opening/closing parts of each phase, and further, bushings are arranged outside the case at a position spaced apart from the case, A multi-circuit switch for use on a pole, characterized in that an operating member is provided which is operatively connected to each of the circuit switches and opens and closes each circuit switch.