JPS6220124Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in choppers and breakers. BACKGROUND OF THE INVENTION There is known a shroud disconnector whose structure is simplified by, for example, molding a container for storing the shag section with an insulating material.

Fig. 1 shows a conventional device of this type, in which 1 is an insulating cylinder, and 3 single-phase insulating cylinders 2 are arranged in parallel and molded with an insulating material such as epoxy resin. ing.

The insulating cylinder 1 has an upper part closed with a three-phase collective upper cover 3 made of an insulator, and a lower part closed with a metal crankcase 4 for each phase, forming an airtight container 5. And inside this container 5
It is filled with an arc extinguishing medium 6 such as SF ₆ gas or insulating oil.

Further, inside each insulating cylinder 2, a sheath section 10 consisting of a fixed contact 7, a movable contact 8, an arc extinguishing device 9, etc. is housed. The movable contactor 8 is connected to the main shaft 12 via an insulating joint 11. This main shaft 12 is connected to an operating device (not shown) outside the crankcase 4 and is configured to be rotatable.

Note that 13 is a current collector, which is arranged so that the movable contactor 8 can make sliding contact therewith. 14 is a lower terminal that is integrally molded with the insulating cylinder 1 and is electrically connected to the current collector 13; 15 is an upper terminal that is electrically connected to the fixed contact 7. The figure shows a closed circuit state.

In the above configuration, the current path is the upper terminal 15
- Fixed contact 7 - Movable contact 8 - Current collector 13 - Lower terminal 14. When the main shaft 12 is rotated by operating an operating device (not shown) during shearing, the movable contact 8 moves downward and an arc is generated between the movable contact 8 and the fixed contact 7. This arc is eventually extinguished by the arc extinguishing device 9, and the shearing is completed.

By the way, in the case of the above method, since the insulation between each phase, more specifically between the fixed contacts 7 and 7, is provided by the creeping surface of the upper cover 3 of the three phases, a large distance between the phases is required in terms of withstand voltage. There is a need. In addition, since each phase insulating cylinder 2 is sealed independently from each other, each phase must be filled with arc extinguishing medium sufficient for sintering, which requires a certain amount of volume and reduces the equipment capacity. It is inevitable that it will become larger. Furthermore, a sufficient insulation distance must be provided between the crankcase 4, which is at ground potential, and the live parts, which increases the size of the device. The drawback was that there were many airtight areas.

This proposal aims to improve these, and the second section is as follows.
This will be explained in detail based on the figures.

In the figure, reference numeral 21 denotes a cylindrical head cylinder 22 which is an insulating cylinder and which separates each phase, and a through-shaped base cylinder 23 which communicates the lower part of this head cylinder 22 with the three phases in common.
It is made of, for example, integrally molded with epoxy resin. Therefore, an insulating space 24 is formed between the head tubes 22 of each phase.
The upper part of the head tube 22 is closed for each phase by an upper lid 25.

Further, the lower part of the base cylinder 23 is closed by a lower lid 26, which forms a closed container 27, the inside of which is filled with an arc-extinguishing medium 6 such as SF ₆ gas.

A common main shaft 28 hermetically passes through the base cylinder 23 at one position, and the movable contacts 8 of each phase are connected to this via an insulating joint 11, so that the operating force of an operating device (not shown) is transferred to the movable contacts 8. is configured to be transmitted to

Further, the upper terminal 15 is electrically attached to the fixed contact 7, and the lower terminal 14 of each phase is connected to the insulating tube 2.
They are integrally molded with the head tube 22 of No. 1 and are each led out to the outside.

The same reference numerals as in FIG. 1 indicate the same or corresponding parts, and the figure shows an open state.

In the configuration described above, the current path is no different from the conventional one. To perform shearing, the common main shaft 28 may be rotated by operating an operating device (not shown).

According to the present invention, since the insulation between each phase is changed from the conventional creeping surface to a space, the distance between the phases can be shortened. Since the conventional metal crankcase part is constituted by the base tube made of insulating resin, the earth potential part is moved away from the charging part, and the device can be made smaller, especially in height. Moreover, since the head tube and the base tube including the lower terminal are integrally molded and the common main shaft is led out from the base tube, there are fewer airtight areas. Moreover, since the lower part is communicated with the insulating cylinder and the base cylinder which is not directly related to the cutting section, the arc-extinguishing medium can be shared, and the size of the apparatus can be reduced. Furthermore, as in the conventional case, the shield and disconnection sections for current conduction and disconnection are independent for each phase, so there is no mutual interference, and extremely practical effects such as no deterioration of the disconnection characteristics are produced.

[Brief explanation of the drawing]

Fig. 1 shows a conventional device, and Fig. 2 shows an embodiment of the present invention, in which a is a simplified cross-sectional plan view;
b is a vertical front view, and c is a vertical side view. 6... arc-extinguishing medium, 8... movable contact, 10...
Edge section, 13... Current collector, 14... Lower terminal,
15... Upper terminal, 21... Insulating tube, 22... Head tube, 23... Base tube, 24... Insulating space, 27
...A sealed container.

Claims (1)

[Scope of Claim for Utility Model Registration] The head cylinders of each phase, which are arranged with an insulating space between them and have lower terminals, and the through-shaped base cylinder, which communicates the inside at the lower part, are integrally molded with insulating resin. an insulating cylinder made up of an insulating cylinder, separate upper lids each sealing a tip of the head cylinder of each phase, a lower lid sealing a lower end of the lower cylinder, and an arc-extinguishing medium filled in the insulating cylinder. a shingle section disposed in the head tube; an operating mechanism section housed in the base tube and transmitting operating force to the movable contacts of each phase of the shingle section; and this operation. A shear breaker comprising a common main shaft connected to a mechanical part, passing through the base cylinder in a hermetic manner to the outside at one point, and to which an operating force is applied.