Multiphase opening-closing equipment

Abstract

The invention aims to solve the problem that the diameter of the insulating bar with enough strength, which supports the voltage switch unit, becomes large to generate the gas VT maximization in the gas VT breaking apparatus which connects and disconnects the high-voltage circuit and voltage switch element by insulating bar. Furthermore, the operation device needs to be located on the bottom of the gas VT and needs more space. The gas VT is configured by that: making the connecting conductor rotate by insulating frame, making the connecting conductor connect or disconnect to the high-voltage terminal and high-voltage side terminal so at to not need insulating bar. Therefore, the invention can install operation device at the side part of the container so as to reduce the space of the gas VT.

Description

technical field [0001] The present invention relates to a transformer for a gas insulated measuring instrument with a circuit breaker capable of connecting and disconnecting a high voltage circuit. Background technique [0002] Transformers for gas-insulated measuring instruments (hereinafter referred to as "gas VT") are connected to gas-insulated switchgear (hereinafter referred to as "GIS") to perform voltage conversion of high-voltage circuits, but when performing GIS DC and AC withstand voltage tests, etc., Requires disconnection from high voltage circuits. Therefore, the gas VT needs to have a breaking device for connecting or disconnecting the relatively high voltage circuit. [0003] use figure 1 , 2 (Patent Document 1) describes a conventional gas VT having a circuit breaker. figure 1 It is a side view showing the internal structure of a conventional gas VT. figure 2 yes figure 1 The A-A line sectional view of the shown conventional gas VT. At the end of the ...

AI Technical Summary

Problems solved by technology

In addition, since the insulating rods 11 are arranged between the phases of the three-phase voltage conversion element 2, it is necessary to ensure a sufficient insulation distance, resulting in an increase in the size and weight of the container 1.

[0006] Moreover, when the gas VT is installed horizontally with respect to the GIS, since there is a distance L from the operating device 10 to the connecting conductor 9, the moment arm (moment arm) force of the self-weight of the connecting conductor 9 and the insulating rod 11 × the distance L will be exerted on the In the airtight introduction part 11C at the bottom of the container 1 of the insulating rod 11, if the insulating rod 11 is designed so that it does not deform against this force, the diameter of the insulating rod 11 becomes larger, and accordingly the size of the operating device 10 becomes larger, leading to an increase in cost.

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