JPH0364971B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a gas circuit breaker.

[Conventional technology]

In general, a phase-separated, three-phase all-operated vertical circuit breaker for gas-insulated switchgear has the circuit breakers housed longitudinally in a vertical tank where the three phases are separated, and the circuit breaker is placed at the bottom of the tank. An operating device for opening and closing is provided. This operating device is housed in a pedestal,
The frame fixedly supports the tank that houses the cutoff section.

The operation device that opens and closes the three-phase cutoff section is installed on one side of the frame, and is arranged so that the three-phase cutoff section is driven by an interphase link connected in the same line or parallel to the operation device. Since the interphase links are linear, that is, arranged in a linear direction, the dimension in the interphase direction tends to be long. In particular, for low-voltage class circuit breakers, where the tank diameter of the disconnecting part is small due to the dielectric strength specific to the SF ₈ gas filled in the tank, even though the phase-to-phase dimensions between each phase tank are small, there are restrictions on the stroke of the link system. I also disliked that the length in the interphase direction could not be reduced. Regarding this, for example, Japanese Unexamined Patent Publication No. 102423/1983, Japanese Utility Model Application No. 57/1983
There is a publication number 143667.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into consideration the case where there is a limit to the space for skirting in the interphase direction, such as when installed indoors, and there was a problem in terms of installation space.

The present invention has been made in view of the above points,
The object of the present invention is to provide a gas circuit breaker that is compact and has an operating system with good switching characteristics.

[Means for solving problems]

The above purpose is to arrange the actuator, braking device, and closing spring device, which are drive generating devices installed inside the frame, in a triangular arrangement in a direction perpendicular to and parallel to the space between the phases, and to utilize the space between these devices in the direction between the phases. This is achieved by reducing the dimensions.

[Effect]

A rotary shaft that simultaneously interlocks the three phases of the shutoff section's power cylinder, which is a movable section, is placed horizontally in the interphase direction within the pedestal at the bottom of the shutoff section, and the operating section of the drive generator is rotated to the center of the rotary shaft. The closing spring device and the braking device were arranged in a direction perpendicular to the axis of the shaft, and a closing spring device and a braking device were arranged on both sides of the operating device in a triangular shape parallel to the operating device.

By configuring the operating device, closing spring device, and braking device in a triangular shape based on the rotary shaft, the space inside the frame can be utilized to the maximum, and the installation area in the interphase direction can be reduced. Ru. The operating force at the time of shutoff is transmitted to the center of the rotating shaft as a rotational moment, and the braking device and closing spring device on both sides act in a well-balanced manner as a moment to brake the operating force.
It is possible to reduce the variation in the opening difference between the three phases of the interrupter contact due to the torsion of the rotating shaft, and to obtain a gas circuit breaker having a compact operating device system with good switching characteristics.

〔Example〕

The present invention will be explained below based on the illustrated embodiments. An embodiment of the present invention is shown in FIGS. 1-3. As shown in the figure, the gas circuit breaker is housed in a three-phase vertical tank 1 each housing a circuit-blocking part therein, and a second rack placed at the bottom of the three-phase vertical tank 1. It is also equipped with a drive generation device and the like that collectively operate the three-phase cutoff section via the link 3. This drive generating device includes an operating device 4, a closing spring device 5, and a braking device 6. In addition, in FIG. 2, 7 is an air tank.
In this embodiment of the gas circuit breaker configured as described above, a rotary shaft 8 is installed horizontally in the interphase direction in the second rack, and a link 3 is connected to the rotary shaft 8 to brake the three-phase cutoff section, that is, the puffer cylinder 9. The operating device 4 is installed at the center of the rotating shaft 8 in a direction perpendicular to the axis of the rotating shaft 8, and the closing spring device 5 and the control device 6 are connected to the rotating shaft 8 on both sides of the operating device 4. 4 and in parallel with these operating device 4, closing spring device 5, and braking device 6.
were arranged in a triangular shape. By doing this, the rotary shaft 8 is installed horizontally in the interphase direction within the pedestal 2, and the rotary shaft 8 and the link 3 that drives the puffer cylinder 9 are respectively connected, and at right angles to the axis of the rotary shaft 8. An operating device 4 is installed in the center of the rotating shaft 8 in the direction, and a closing spring device 5 and a control device 6 are installed on the rotating shaft 8 on both sides of the operating device 4 in parallel with the operating device 4, and device 5, braking device 6
are arranged in a triangular shape.
Therefore, it is possible to make maximum use of the space inside the frame 2 and reduce variations in the opening difference between the three phases of the interrupter contact due to the twisting of the rotating shaft 8, resulting in a compact operating system with good switching characteristics. It is possible to obtain a gas circuit breaker that makes it possible to have the following.

That is, the vertical tank 1 houses a circuit breaker, a puffer cylinder 9, etc. therein, and a rotary shaft 8 is installed horizontally in the interphase direction of the frame 2 at the bottom of the vertical tank 1. Three phases of a puffer cylinder 9 are connected to this rotary shaft 8 through links 3, so that the three phases are interlocked simultaneously. The operating device 4 of the drive generating device is arranged in the center in the direction perpendicular to the axis of the rotating shaft 8, and the closing spring device 5 and the braking device 6 are arranged on both sides of the operating device 4 in a triangular arrangement parallel to the operating device 4.
was placed. Both ends of the rotating shaft 8 are supported by the pedestal 2 via bearings.

By doing this, the shutoff operation becomes as shown in FIG. In other words, the operating force of the operating device 4 is F, the length of the lever arm from the rotating shaft 8 to the operating device 4 is L, the force reaction force is F ₁ , and the length of the lever arm from the rotating shaft 8 to the link 3 is l ₁ , the dart pot braking force of the braking device 6 is F ₂ ,
The length of the lever arm from the rotating shaft 8 to the braking device 6 is l ₂ , the closing spring force of the closing spring device 5 is F ₃ ,
If the length of the arm of the lever from the rotary shaft 8 to the closing spring device 5 is _l3 , then the rotational moment of the rotary shaft 8 is as shown in the following equation, and is driven.

FL＞3F ₁ l ₁ +F ₂ l ₂ +F ₃ l ₃ , and at the end of the cutoff operation, FL=3F ₁ l ₁ +F ₂ l ₂ +
F ₃ l ₃ and braking occurs. The closing operation is driven by the closing spring force F' ₃ compressed and accumulated during the closing operation, and F≫F' ₃ .

During this operation process, a torsional force acts on the rotating shaft 8, and the torsional angle causes a difference in the opening of the three-phase puffer cylinder 9. However, the operating force from the operating device 4 is transmitted to the center of the rotating shaft 8, and the control is By transmitting power to both ends, differential opening can be minimized.

Moreover, since the operating device 4, the braking device 6, and the closing spring device 5 are arranged in a triangle with the operating device 4 in the center, the space inside the pedestal 2 can be utilized to the maximum, and the installation space can be reduced.

In this way, according to this embodiment, the operating device 4, closing spring device 5, and braking device 6 are arranged in a triangle with the operating device 4 in the center, so that variations in the opening difference between the three phases of the interrupter contactor can be minimized. In addition to improving the opening and closing characteristics, the space inside the frame 2 can be utilized to the maximum, and a compact gas circuit breaker with a small installation volume can be obtained.

〔Effect of the invention〕

As described above, the present invention provides a gas circuit breaker that is compact and has an operating system with good opening/closing characteristics. can.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of the gas circuit breaker of the present invention, FIG. 2 is a side view of the same embodiment, and FIG. 3 is a perspective view of the drive link portion of the same embodiment. 1... Vertical tank, 2... Frame, 3... Link, 4... Operator, 5... Closing spring device, 6...
Braking device, 8... Rotating shaft, 9... Power cylinder.

Claims (1)

[Claims] 1 A 3-phase vertical tank that houses each shut-off part inside the tank, and a stand that is placed at the bottom of this 3-phase vertical tank, and that operates the 3-phase shut-off parts all at once via a link. A three-phase collectively operated type gas circuit breaker comprising a drive generation device, the drive generation device having an operating device, a closing spring device, and a control device, in which a rotating shaft is installed horizontally in a direction between the phases in the mount. The rotary shaft and the links for driving the three-phase cutoff parts are respectively connected, and the operating device is installed at the center of the rotating shaft in a direction perpendicular to the axis of the rotating shaft, and both sides of the operating device are connected to each other. A gas circuit breaker characterized in that the closing spring device and the braking device are disposed on the rotating shaft in parallel with the operating device, and such that the operating device, the closing spring device, and the braking device form a triangular shape.