JPH0540649Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a multi-circuit switch, and particularly improves safety by preventing incorrect insertion of the grounding cover, and by rotating the direction of the grounding cover back and forth. , relates to a multi-circuit switch that can be used also as a grounding cover for other circuits.

[Conventional technology]

A switch is used to open and close a circuit in which a rated current flows, and is generally distinguished from a circuit breaker, which opens and closes a circuit in which a fault current flows, and a disconnector, which opens and closes a circuit in which no load current flows. For example, Tokuho 3-
Publication No. 6083 shows the structure of a general switch, in which each circuit is opened and closed by inserting and opening a movable electrode cover having a movable electrode to a fixed electrode cylinder having a fixed electrode. I'm starting to be able to do it. On the other hand, if a grounding lid is inserted in place of the movable electrode lid, the distribution line can be grounded.

Examples of grounding covers used in general multi-circuit switches include those shown in FIGS. 5a and 5b. Figure 5a shows a two-circuit switch, with switch 30
A grounding cover 5 is connected to the fixed electrode 23a on the main cable 20 side and the fixed electrode 23b on the branch cable 22 side.
The ground electrodes 10 are connected to the main cable 20 and branch cables 22 of each ground cover 5 . 21 is a bus bar connecting the fixed electrodes. The ground electrode 10 is grounded via a lead wire or the like, and the safety of workers working on the power distribution line can be ensured. FIG. 5b shows a four-circuit switch 30, with main cable 20
A grounding cover 5 is inserted into the fixed electrode 23a on the side and a fixed electrode 23e on the side of the branch line cable 22b, and a blind cover 5a is placed on the fixed electrode 23b, 23d on the side of the branch line cable 22a, 22c. . Note that 21a, 21b, and 21c are busbars connecting the fixed electrodes. Also in this case, the ground electrode 10 of each ground cover 5 is inserted so as to be connected to the main cable 20 and the branch cable 22b. When inserting the grounding cap 5, it is necessary to check the direction of the grounding electrode 10 of the grounding cap 5 before inserting it.

[Problem that the invention attempts to solve]

However, according to the conventional multi-circuit switch, the grounding cover inserted into each fixed electrode can be inserted regardless of the orientation of the grounding electrode. Therefore, it is necessary to check the position of the grounding electrode on the grounding cover of each circuit while inserting it into the fixed electrode. If you neglect to check or make a mistake, you will usually connect the grounding electrode on the grounding cover to the main cable of each circuit. In contrast to the fixed electrode connected to the branch line cable, there is a risk of incorrect insertion such that the charge is inserted into the fixed electrode on the busbar side. For this reason, there was an inconvenience that the safety of the workers could not be ensured.

[Means for solving problems]

The present invention has been developed in view of the above, and in order to prevent incorrect insertion of the grounding cover such as when inserting the grounding cover into the fixed electrode with the grounding electrode of the grounding cover facing the bus bar side. A fixed stopper is protruded downward from one end of the fixed rail of the fixed part that guides and fixes the fixed part, and a fixed stopper is provided at one end of the movable rail of the grounding cover that engages with the fixed rail of the fixed part. A movable stopper is made to protrude laterally from below the movable rail, and the fixed stopper and the movable stopper are configured in a relative positional relationship such that they collide if they are not inserted in a predetermined direction, so that insertion can only be made in a certain direction. Furthermore, by changing the direction of the grounding cover back and forth, the present invention provides a multi-circuit switch which can be used for other circuits with the fixed stopper in the opposite position.

That is, the multi-circuit switch of the present invention is equipped with the following means.

(1) Grounding cover This is inserted into each fixed electrode to ground the main cable and branch cables. This grounding lid has a grounding electrode inside, and this grounding electrode is inserted into the fixed electrode connected to the main cable and branch cable of each circuit, and each phase is short-circuited and grounded via lead wire etc. However, if the grounding electrode is inserted in the wrong direction, the busbar side will be grounded, and the desired grounding will not be obtained. For this reason, it is necessary to insert the grounding lid into the fixed part described later with directionality.For example, a stopper is installed at the front and back of one of the movable rails provided on the grounding cover so as to engage with the fixed rail of the fixed part. When the grounding lid is inserted into the fixed part, the stopper is formed in such a position that if the grounding electrode is inserted in the opposite position, it will collide with the fixed stopper described later, making insertion impossible. let On the other hand, this purpose can also be achieved by making the shapes of the engaging portions of the fixed rail and the movable rail asymmetrical instead of using the stopper.

(2) Fixing part This part guides and further fixes the grounding cover. A fixed rail or the like is provided in this fixed portion, and a movable rail or the like provided on the grounding lid is inserted to fix the grounding lid. For example, if a fixed stopper is provided at one end of this fixed rail to prevent incorrect insertion of the grounding cover, and the grounding cover is inserted, the position of the grounding electrode of the grounding cover may be reversed. is formed at a position where it collides with the movable stopper described above and makes insertion impossible.

[Effect]

With the above configuration, when inserting the movable rail of the grounding lid into the fixed rail of the fixed part, for example, when inserting the grounding lid with the movable stopper facing in the direction where the fixed stopper formed on the fixed rail is not located,
The fixed stopper and the movable stopper are inserted without any collision occurring. For this reason, the grounding electrode of the grounding cover is inserted in the direction of the main cable and branch cable of the fixed electrode of each circuit, and is grounded via the lead wire. Furthermore, by changing the direction of the grounding cover from front to back, it can be used for other circuits with stoppers provided at opposite positions. For example, in the case of a two-circuit switch, by changing the direction of the grounding cover for the right circuit back and forth, it can be used as the grounding cover for the left circuit, and by changing the direction of the grounding cover for the left circuit back and forth, it can be used as the grounding cover for the right circuit. It can be used as a grounding lid. Incidentally, the same applies to the case of a switch having two or more circuits, as is clear from FIGS. 5a and 5b.

〔Example〕

Hereinafter, the multi-circuit switch of the present invention will be explained in detail.

FIG. 1 shows an embodiment of the present invention, in which the movable electrode (not shown) is removed and the movable rail 2 of the grounding lid 5 is replaced by a fixed rail 1 that slides and guides and is further fixed. 1, the movable rail 2 is supported, a fixed stopper 3 formed only on a predetermined side in front of the fixed rail 1, and a movable stopper 4 formed only on a predetermined side in front and behind the movable rail 2. , a grounding cover 5 to be applied to each fixed electrode of each circuit, a main cable fixed electrode 6a constituting each fixed electrode, bus side fixed electrodes 6b and 6c connected by a bus 6e, and a branch line cable fixed electrode 6d. It's getting old.

FIG. 2 shows the structure of the grounding lid 5 of the present invention, which includes a shorting lead wire 7 that connects the grounding electrodes 10, which will be described later, to each fixed electrode and grounding them in three phases at once, and a grounding wire connected to the shorting lead wire 7. It consists of a lead wire 8 and an alligator grip 9 provided at the end of the ground lead wire 8. In the figure, numerals 2, 4, and 5 are the same as in FIG. 1, so their explanation will be omitted.

Figures 3a and 3b show a state in which the grounding part is engaged with the fixed part of the present invention, and the grounding electrode 10 that is inserted into the fixed electrode connected to the main cable and the branch cable is provided on one side of the grounding cover 5. It is being on the other hand,
The movable rail 2 is slidably engaged with the fixed rail 1 of the switch main body, and the fixed rail 1
is raised and lowered via a slide fitting 11 along a lifting rail 11a by a mechanism (not shown) or by operating a handle. Note that the other explanations are the same as those in FIGS. 1 and 2, and will therefore be omitted.

In the above configuration, the grounding cover 5 is attached to the fixed rail 1.
Insert the movable rail 2. At this time, a fixed stopper 3 projects downward from one side of the fixed rail 1, and a movable stopper 4, one of which is long and laterally protruded below the movable rail 2, is inserted so as not to collide with the fixed stopper 3. That is, it can be inserted by changing the direction of the movable stopper 4 in which it protrudes laterally and the direction of the fixed stopper 3. This is configured such that the relative positions of both stoppers 3 and 4 are such that when the grounding cover is inserted, the position of the grounding electrode 10 is directed toward the fixed electrodes of the main cable and branch cable of each circuit. has been done. Then, when the movable rail 2 of the grounding lid 5 is inserted into the fixed rail 1 and locked in a predetermined position, the mechanism section is operated or the grounding lid 5 is thrown into the fixed electrode by operating the handle. At this time, the slide fitting 11 is lowered along the elevating rail 11a, and as described above, the ground electrode 10 is thrown toward the fixed electrode of the main cable or branch cable of the corresponding circuit. and ground electrode 10
It is grounded via a shorting lead wire 7 that short-circuits each phase, a grounding lead wire 8, an alligator grip 9, etc. This grounding can be done separately or simultaneously for the main line side circuit and the branch line side circuit, thereby ensuring the safety of workers working on the power distribution line. In Figure 3a, "for left circuit" is displayed on the front.
It has a ``right circuit'' sign on the back. Checking this sign before two stoppers collide can improve work efficiency.

In addition, in the above-mentioned embodiment, a stopper was provided, but as shown in FIG.
By making the shapes of the fixed rail 1 and the movable rail 2 asymmetrical and reversing the shapes of a and b, incorrect insertion can be prevented, and in the left and right circuits,
Can also be used as a grounding cover.

[Effect of idea]

As explained above, according to the multi-circuit switch of the present invention, a fixing stopper is protruded downward from one end of the fixing rail of the fixing part that guides and fixes the earthing cover, and the fixing part A movable stopper is made to protrude laterally from below the movable rail on one of the lower sides of the movable rail of the grounding lid that engages with the fixed rail of the ground cover, and if the fixed stopper and the movable stopper are not inserted in a predetermined direction, they will collide. Since the ground cover is configured in such a relative positional relationship that it can only be inserted in a certain direction, it is possible to eliminate incorrect insertion of the ground cover. Furthermore, by changing the orientation of the grounding cover back and forth, it can be used for other circuits having fixed stoppers at opposite positions.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing one embodiment of the present invention;
The figure is an explanatory diagram showing the grounding part of the present invention, Figure 3 a, b
4A and 4B are explanatory diagrams showing the fitted state of the fixed part and the grounding part of the present invention, FIGS. 4A and 5B are explanatory diagrams showing other embodiments of the present invention, and FIGS. 5A and 5B are explanatory diagrams showing a multi-circuit switch. . Explanation of symbols, 1... Fixed rail, 2... Movable rail, 3... Fixed stopper, 4... Movable stopper, 5... Grounding cover, 6a... Main line side fixed electrode,
6b, 6c...Bus bar side fixed electrode, 6d...Branch line side fixed electrode, 6e...Bus bar, 7...Short lead wire, 8...Ground lead wire, 9...Alligator grip, 10...Ground electrode , 11...Slide metal fittings.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) One corresponding fixed electrode of a main line switch and a branch line switch is connected to the bus bar, and the other fixed electrode is connected to the main line cable and the branch line cable, In a multi-circuit switch in which a main line side cable or a branch line side cable can be grounded by supporting a grounding cover in place of the movable electrode cover on a fixed rail supporting a movable electrode cover that connects and releases the fixed electrode. , wherein the grounding lid has a movable rail that engages with the fixed rail, and the movable rail can run on the fixed rail when the grounding lid is facing in a predetermined direction. Multi-circuit switch. (2) The grounding lid has a movable stopper, and when the grounding lid is not facing the predetermined direction, the movable stopper engages with the fixed rail or a fixed stopper provided in the vicinity thereof, and the movable rail 2. The multi-circuit switch according to claim 1, which is registered as a utility model and has a configuration in which the switch cannot run on the fixed rail. (3) Utility model registration Claim 1, wherein the engaging portions of the fixed rail and the movable rail have an asymmetrical shape and can be engaged only when the grounding cover is facing in the predetermined direction. Multi-circuit switch as described in section.