JPH0213523B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to gas insulated electrical equipment, and in particular to gas insulated electrical equipment having a fence, a disconnection section, or a disconnection section fixedly housed in a tank with an absolute support. It is related to.

A gas-insulated switchgear, which is one type of gas-insulated electrical equipment, is a switchyard in which a circuit breaker, a disconnector, a grounding device, etc. are combined and housed in a tank sealed with insulating gas. Each piece of equipment that makes up this switchyard is extremely reliable, but if an internal accident occurs in one of the components, the entire switchyard will stop functioning, and it will take a lot of effort to recover from the accident. It will take a long time. Conventionally, when such an accident occurred, it was necessary to replace not only each component part such as the shield, disconnector, disconnector, etc., but also the entire device including the tank. Therefore, it is necessary to plan in advance the arrangement of the gas insulated switchgear which can be replaced as a whole, which has the disadvantage that the overall size of the device including the extra space becomes too large.

This invention was made in view of the above-mentioned circumstances, and it is fixed in the tank via an adapter, and at least one part is attached to the tank wall near the support insulator that fixes the disconnector part or the disconnector. The purpose of the present invention is to provide gas-insulated electrical equipment that eliminates the drawbacks of conventional equipment by having a configuration with two inspection ports so that only the internal parts or equipment that require replacement can be replaced using the inspection ports. It is something.

Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings. The illustrated embodiment is a vertical gas insulated switchgear used in gas insulated switchgear. It is fixed and stored in a grounded tank 1. Support insulator 3
is adapter 5 fixed to tank 1 with bolt 4
is fixed with bolt 6. Conductors 7a and 7b extending from the arc extinguishing chamber 2 are connected to the next gas insulated equipment, disconnector (not shown), etc., respectively. At least one inspection port 9 equipped with a blind lid 8 is provided on the side wall of the tank 1 near the support insulator 3. At the bottom of tank 1 is a mechanism tank 10.
A shaft lever extending from the arc extinguishing chamber 2 and driving a contact in the arc extinguishing chamber 2 is disposed, and this shaft lever is connected to an operating mechanism 11. The tank 1 is supported by a pedestal 12. An inspection cover 13 is connected to the upper end of the tank 1, and the arc extinguishing chamber 2 can be inspected by removing the inspection cover 13 during normal inspection.

In the gas insulator and disconnector with the above configuration,
If an internal accident, ground fault, etc. occurs and it becomes necessary to take out the entire arc extinguishing chamber 2 from the tank 1, remove the blank cover 8, use the inspection port 9 to loosen the bolt 4, and remove the adapter 5, support The insulator 3 and the arc extinguishing chamber 2 can be pulled up together from the upper end of the tank 1 from which the inspection cover 13 has been removed. Then, in order to incorporate the new arc extinguishing chamber 2 into the tank 1,
They can be assembled in the reverse order of the above. In particular, in the case of a vertical device as in this embodiment, the inspection port 9 has the advantage of being able to be used as a cleaning port in the tank 1 after the arc extinguishing chamber 2 is installed.

As described above, according to the present invention, the conductors 7a,
without disconnecting the device connected to 7b.
Furthermore, necessary equipment and parts within the tank can be replaced without moving the tank 1, pedestal 12, operating mechanism 11, mechanical tank, etc. Therefore, the time required for accident recovery can be significantly reduced compared to the conventional method.

Although the above embodiments have been described with respect to vertical gas insulators and disconnectors, it goes without saying that similar effects can be achieved with horizontally arranged gas insulators and other electrical equipment such as disconnectors.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view of one embodiment of the invention. 1...tank, 2...arc extinguishing chamber, 3...support insulator, 4, 6...bolt, 5...adapter, 7a,
7b...Conductor, 8...Blind lid, 9...Inspection port,
10...mechanism tank, 11...operation mechanism, 12...
...Frame, 13...Inspection cover.

Claims (1)

[Claims] 1. A tank in which an insulating gas is sealed, an arc extinguishing chamber fixed to a supporting insulator and housed in the tank, a bolt fixing the supporting insulator to the tank via an adapter, and a bolt provided in the tank. gas insulated electrical equipment, comprising: an inspection cover for taking the arc extinguishing chamber in and out of the tank; and an inspection port provided on a side wall of the tank near the adapter and for operating the bolt.