JPS644292B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an auxiliary switch, that is, a breaker (main switch) that can adjust the timing of turning on and off the contact points.
In conjunction with the operation, the open/close status of the breaker is displayed,
This invention relates to a circuit breaker equipped with an interlock display and a switch for electrically controlling the operation of the circuit breaker.

As the demand for improving the reliability of electric power systems increases, the operation time of auxiliary switches for power disconnectors is also being reconsidered. Since an auxiliary switch is used in the control circuit of a power cutter, it is natural that the reliability of the auxiliary switch itself must be improved. In order to improve this, the operating time of the auxiliary switch must be adjusted by taking into account the operating time of the relay, etc.
When adjusting the operating time of the auxiliary switch, there are four types of timing: ON and OFF of the a contact and ON and OFF of the b contact, which will be explained in Figure 1 below, and it is necessary to adjust the timing for each. be.

Figure 1 shows an example of a conventional shingle breaker. In the figure, 1
The movable contact 2 is a fixed contact for a chopper or disconnector, and a movable contact for the chopper or disconnector, and the movable contact 2 is connected to an operating mechanism 4 via a lever 3. Auxiliary switch 9 a
The contact point and the b contact point each consist of a movable contact 7 and a fixed contact 8, and are connected to the lever 3 via a link mechanism consisting of a lever 6 and a rod 5.

The movable contact 2 is driven by the operating mechanism 4, and a main switch 22 consisting of the fixed contact 1 and the movable contact opens and closes the circuit. On the other hand, the a contact and the b contact of the auxiliary switch 9 perform on/off operations as the movable contact 7 rotates in response to the opening and closing operations of the main switch 22. The timing of the auxiliary switch 9 is adjusted by adjusting the length of the rod 5 and the width of the movable contact 7.

In the conventional breaker as described above, the auxiliary switch 9 and the operating mechanism 4 are directly connected via the rod 5 and lever 6, so there is no play in the operation, and the ON/OFF of the A and B contacts is eliminated. cannot adjust the timing separately. For example, shorten rod 5 and make contact a.
If the OFF timing is advanced, the timing of the a contact ON will be delayed. Therefore, it has the disadvantage that the ON and OFF timings of the A contact and B contact cannot be adjusted separately to improve the reliability of the power system.

The present invention has been made in view of the above-mentioned drawbacks of the conventional seam disconnector, and an object of the present invention is to provide a seam disconnector in which the operation time of the auxiliary switch can be freely adjusted. . That is, the present invention provides a breaker comprising an operation mechanism that rotates a lever to open and close a main switch connected to the lever, and a link mechanism that opens and closes an auxiliary switch by rotating the lever. The gist of the breaker is that it is provided with an operation delay mechanism that delays the opening and closing operations of the auxiliary switch and a toggle mechanism that supports the auxiliary switch in the open or closed position.

FIG. 2 shows an example of a sheath disconnector according to the present invention.
This shingle breaker is constructed by replacing the lever 6 in the conventional shingle breaker shown in FIG. 1 with the structure shown in FIG. 2.

Reference numeral 11 denotes a lever with a forked end, and this lever 11 is connected via a rod 5 to an operating mechanism (not shown). 0 is a substantially T-shaped lever, and this lever 10 is connected via a rod 12 to an auxiliary switch (not shown).
A spring receiver 18 is connected to the lever 10, and a spring 13 is provided to the spring receiver 18. A foot portion 10a of the lever 10 is arranged between bolts 14 and 15 provided on the lever 11. lever 10,
The lever 11 rotates with a pin 16 as a fulcrum, and the spring receiver 18 rotates with a pin 17 as a fulcrum. Lever 10, lever 11, and bolts 14, 15 constitute an operation delay mechanism.

FIG. 2 shows a case where the armature disconnector is in a closed state, and the lever 10 is biased counterclockwise by the spring 13, but the lever 10 is biased by the stopper 19 in the counterclockwise direction.
0 and an auxiliary switch connected to lever 10 maintains the closed position. In the circuit opening operation, the rod 5 moves rightward and the lever 11 rotates clockwise. When the lever 11 rotates to a certain extent, the bolt 14 of the lever 11 will close to the foot 10a of the lever 10.
, and the lever 10 begins to rotate clockwise. The spring receiver 18 rotates counterclockwise, and when the lever 10 rotates to a certain extent, the lever 10 and the spring receiver 18 have a toggle mechanism, so the spring 13
The load reaches a fulcrum that does not apply rotational torque to the lever 10. Furthermore, the load of the spring 13 that causes the lever 10 to rotate clockwise changes from biasing the lever 10 counterclockwise to biasing the lever clockwise.
The clockwise loading of spring 13 relative to 0 holds lever 10 and the auxiliary switch connected to lever 10 in the open position.

The timing of the operation of the lever 10 can be freely adjusted by adjusting the length of the bolt 14. Therefore, the timing of the operation of the auxiliary switch connected to the lever 10 can be adjusted by means of the bolt 14.

On the other hand, the circuit closing operation is performed in the opposite process to the circuit opening operation, but the timing of the operation of the lever 10 is adjusted by the bolt 15, and the operation timing of the auxiliary switch can be freely adjusted.

Figure 2: One device for the A contact of the auxiliary switch,
If one is used for the B contact, the A contact and B contact
The four timings of ON and OFF can be adjusted freely.

As an example of the present invention, as shown in FIG.
Since the pins 0 and 11 are set as the same rotational fulcrum by the pin 16, the dimensions can be made small.

Another example of the invention is shown in FIG. The same reference numerals in the drawings indicate parts that are the same or have the same functions. The operation is similar to that of the invention example shown in FIG. 2, but the levers 10 and 11 rotate about pins 16 and 21, respectively. Although this structure is large in size, it has features such as a simple structure of the levers 10 and 11.

As described above, according to the present invention, it is possible to freely adjust the ON/OFF operation time of the A contact and B contact of the auxiliary switch, thereby contributing to improving the reliability of the power system.

Although the present invention has been described with reference to an auxiliary switch used in a disconnector or disconnector, other usage examples such as a disconnector can also be easily applied.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional shingle breaker, FIG. 2 is an explanatory diagram of a shingle breaker according to the present invention, and FIG. 3 is an explanatory diagram of another shingle breaker according to the present invention. In the drawings, the same reference numerals indicate parts that are the same or have the same functions. 3...Lever, 4...Operation mechanism, 9...Auxiliary switch, 22...Main switch.

Claims (1)

[Claims] 1. An operating mechanism, a first lever that is rotated by the operating mechanism, a main switch that is opened and closed by the rotation of the first lever, and a main switch that is rotated by the rotation of the first lever. A second lever, a third lever rotated by rotation of the second lever, and an auxiliary switch actuated by rotation of the third lever, the second lever and The third lever is engaged with an adjustable gap, and a toggle mechanism is attached to the third lever to support the auxiliary switch in the open or closed position. Sushiya disconnection.