Insulated type switching device

Abstract

In an insulated type switching device, during rotation of a movable conductor 19 around a pivotal axis 35 between a stationary conductor 16 and a ground conductor 17 all of which are disposed in a vacuum vessel 12, the movable conductor 19 uninterruptedly takes four positions of closing position Y1, opening position Y2, disconnecting position Y3 and grounding position Y4, thereby a series of switching operations can be performed uninterruptedly, the operation and handling thereof are facilitated as well as the size of the insulated type switching device is reduced.

Description

BACKGROUND OF THE INVENTION1. Field of the InventionThe present invention relates to an insulated type switching device in which at least one of a circuit breaker, a disconnecting switch, a load break switch and a grounding switch is collectively used.2. Description of the Prior ArtIn an electric power receiving and transforming substation, generally an electric power from, for example, an electric power generating company is received via a disconnecting switch and a circuit breaker and the received electric power is supplied to a load, for example, a motor, after the voltage of the received electric power is transformed to a proper voltage for the load. In order to perform maintenance and inspection of the machines and apparatus in such electric power receiving and transforming substation, after interrupting the circuit breaker, the disconnecting switch is opened which is provided separately from the circuit breaker and then the grounding switch is grounded, thereby possible residu...

AI Technical Summary

Benefits of technology

An object of the present invention is to provide an insulated type switching device which permits a series of operations to be performed uninterruptedly and further permits easy handling thereof and the size reduction thereof.

Another object of the present invention is to provide an insulated type switching device which reduces the necessary operating force of the operating mechanism therefor by making use of an electromagnetic force generated therein and further permits the size reduction thereof.

Problems solved by technology

Further, when the grounding switch is grounded while the bus is kept charged, an accident is caused, therefore for preventing such accident an interlock arrangement is provided between the disconnecting switch and the grounding switch.

However, in the conventional switching device such series of operations can not be uninterruptedly performed, the respective operations are not easily performed and further the respective switches can not be easily handled.

Further, since the circuit breaker, the two disconnecting switches and the grounding switch are respectively arranged separately, such arrangement makes the entire size thereof large, makes the operation thereof difficult and may cause a possible erroneous operation.

Further, when the grounding switch is grounded while the bus is kept charged, an accident is caused, therefore for preventing such accident an interlock arrangement which is complex and strong is provided between the disconnecting switch and the grounding switch, such interlock arrangement limits the arrangement of machines and apparatus therein which further increases the size of the entire device.

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