JPS61109229A - 3-phase package gas breaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a three-phase collectively grounded tank-type gas circuit breaker, and particularly to a phase-to-phase insulator suitable for providing a parallel capacitor between each phase pole.

[Background of the invention]

For example, as shown in Japanese Unexamined Patent Publication No. 56-1'14231, in a three-phase collectively grounded tank type gas circuit breaker, current interruption is conventionally achieved by housing individual interrupting parts in independent insulating containers for each phase. Aima with hot gas at the time.

This prevents flash shorts between grounds.6 However, because the voltage of conventional three-phase bulk gas circuit breakers was relatively low and the rated breaking current was less than moderate, it was difficult to use the circuit breaker in a small space. However, no consideration was given to the use of ancient measuring instruments that required parallel capacitors to be installed between poles.

[Purpose of the invention]

The purpose of the present invention is to greatly reduce the space occupied by the insulator, thereby increasing the area space around the selection section, maintaining sufficient breaking performance, and thereby achieving a compact, ultra-high voltage, large capacity Our objective is to provide a three-phase bulk gas circuit breaker.

[Summary of the invention]

FIG. 3 is a longitudinal cross-sectional view of a conventional three-phase bulk gas circuit breaker.

Reference numeral 1 designates a grounded tank that houses all of the three-phase cut-off parts for U, V, and W, 1a is its pedestal, 1 is an operating device, and 11 is a link that transmits the force of the operating device to the interrupting parts of each phase. Mechanisms, etc.

The three-phase phase cut-off parts are provided inside the grounding tank 1 on the upper part of the pedestal 1a at intervals of 12 degrees, for example, W.
In terms of phases, 2W is a fixed contact, 4W is a movable contact, and 2W and 4W form a pair of W-phase contacts. 3W is an insulator nozzle, 5W is a buffer cylinder,
5W' is a fixed piston. A mechanism section 11 is connected to the shaft of the buffer cylinder 5W via an insulated operating rod 6W.
゜The controller and the controller are connected. 13W is an insulating cylinder that houses the W-phase interrupting part, and serves as an inter-pole support member that fixes the fixed contact 2W at the upper part, and supports one end of the fixed piston 5W' at the lower part, as well as an insulator between the phases. There is also. The entire fixed part is attached to the upper end of the supporting insulating tube 7w. 10
W is an auxiliary volume on the stator exhaust side, and 8W and 9W are conductors.

FIG. 4 shows the position of each phase in the above example. FIG. 3 is a cross-sectional view of the shaft cutter in a state in the middle of interruption. For each of the U, V, and W phases, reference numeral 5 denotes a cutoff section including a buffer cylinder, and numeral 13 denotes an insulating cylinder housing the cutoff section of each phase.

Conventionally, the insulating cylinder 13 (U, V, W) that houses the interrupting part was almost always used as the buffer cylinder 5 because the rated voltage and rated breaking current were not relatively large.
It was a space with an inner diameter close to the outer diameter of (U, V, W).

Considering this type of extension with ultra-high voltage and large capacity three-phase finger speed circuit breakers, the issue of installation space for the parallel capacitor between poles required to ensure breaking performance is a problem with the high voltage and large capacity. It becomes difficult to secure sufficient storage space for the shutoff unit. That is, the conventional insulating container employing a cylindrical shape has the disadvantage of resulting in a large blockage with an extremely poor space factor.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, 1 is a grounded tank, 3 is a shutoff nozzle part for each phase U, v, and W, 5 is a buffer cylinder, and 13 is a phase insulator, whose members are connected to the axis of the grounded tank 1. Starting from the center, Y-shaped radial insulator walls are formed at 120" intervals so as to isolate the U, V, and W phase cutoff sections. Each phase is an insulator having a hole opened in the axial direction in a part thereof so that a parallel capacitor 14 between poles corresponding to each phase can be installed.

16 (U, V, W) is the inspection hole 17° (U
, V, W) indicate the closing plate of the inspection hole.

FIG. 2 shows a longitudinal section of the circuit breaker shown in FIG. 1, showing a state in the middle of current interruption. The interphase insulator 13, which also serves as a housing for the parallel capacitor 14, must be a barrier that is long enough in the axial direction to isolate at least the area from the fixed contact 2 to the buffer cylinder 5 of each interrupting part. be.

Reference numeral 10 denotes an auxiliary container that receives hot gas (indicated by an arrow) blown out by an arc when the current is cut off, and is a member that effectively prevents flash shorts to ground in the axial direction of each phase.

According to this embodiment, since the isolator of each phase cutoff part is also used as the parallel capacitor housing between the respective poles, the installation space is significantly reduced, and it is possible to Since the gas space around the shutoff part can be made sufficiently large, it is possible to provide a high-performance three-phase bulk tank type gas circuit breaker.

〔Effect of the invention〕

According to the present invention, since a cylindrical container is not used as the insulator for storing the interrupter, the gas space area around the interrupter can be made sufficiently large, and it can also be used as a container for storing parallel capacitors between poles. We can provide large capacity three-phase bulk gas circuit breakers.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of one embodiment of the present invention, and a vertical cross-sectional view of the second town, showing a state in the middle of interruption. DESCRIPTION OF SYMBOLS 1... Grounding tank, 2... Fixed contact, 3... Insulating nozzle, 4... Movable contact, 5... Buffer cylinder, 13... Phase insulator and capacitor storage member, 1
4...Parallel capacitor.

Claims (1)

[Claims] 1. A blowing pressure generating unit consisting of individual fixed contacts, movable contacts, insulating nozzles, pistons, and cylinders for three phases is housed in one grounded tank, and A three-phase gas circuit breaker that isolates and separates each phase, characterized in that the cross section perpendicular to the axial direction of the separator is shaped like a ■. 2. The three-phase bulk gas according to claim 1, characterized in that an inter-electrode parallel capacitor for each phase is inserted in the axial direction into the above-mentioned phase spacer insulator disposed between each phase. circuit breaker.