JPH04307905A - Gas-insulating electric apparatus - Google Patents

Abstract

PURPOSE:To miniaturize a tap selector and a changeover switch and reduce the installation space of equipment by putting a gas-insulating electric apparatus in the shape of a tank in which the pressure of charged insulating gas can be raised and improving the insulation resistance of insulating gas. CONSTITUTION:The electric equipment body housing part consisting of an iron core 1 and a coil 2 of gas insulating electric equipment stores, as a nearly oblong tank 7, the electric equipment body together with insulating gas 5. The housing part for a tap selector 3A and a changeover switch 4A, as the shape of a separate chamber of a round tank 8 which can take the internal pressure high, stores the tap selector 3A and the changeover switch 4A together with insulating gas 5A. The pressure of the insulating gas 5A charged in the round tank 8 is made higher than that of the insulating gas 5 inside the nearly oblong tank on the side of electric equipment body storage so as to improve the insulation resistance.

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION This invention relates to gas insulated electrical equipment.

0002

2. Description of the Related Art Conventionally, gas-insulated electrical equipment includes an electrical equipment main body consisting of an iron core 1 and a coil 2, a tap selector 3 and a switching switch 4 used to switch taps during load, as shown in FIG. It was housed in a substantially rectangular tank 6 and insulated with an insulating gas 5 such as SF6.

0003

Generally, the dielectric strength of an insulating gas, such as SF6 gas, increases in proportion to the pressure filled into the tank. However, the shape of the tank of the conventional gas-insulated electrical equipment described above is approximately rectangular, and therefore the internal pressure strength of the tank cannot be increased. Therefore, even if the insulating gas filling pressure is high, it is only about 1.2 kilograms per square centimeter, and there is a problem that it cannot be increased. Therefore, there is an inconvenience that the tap selector 3 and the switching switch 4 must be made larger in terms of dielectric strength. Therefore, the present invention improves the dielectric strength of gas-insulated electrical equipment by creating a tank shape that can increase the sealing pressure of the insulating gas, making the tap selector and switching switch smaller, and reducing the installation space of the equipment. This is how it was done.

0004

[Means for Solving the Problems] As shown in FIG. 1, the shape of the tank is a substantially rectangular tank 7 in which the electric equipment main body storage part is made up of an iron core 1 and a coil 2, and a storage part for a tap selector 3A and a switching switch 4A. is a circular tank 8 that can provide high internal pressure strength.
It was designed as a separate room.

[0005]

[Operation] By changing the shape of the tank on the storage side of the tap selector 3A and switching switch 4A to a circular tank 8 that can increase the internal pressure strength, and making it a separate room from the storage area of the electrical equipment main body,
The dielectric strength is improved by making the sealing pressure of the insulating gas 5A in the circular tank 8 higher than the sealing pressure of the insulating gas 5 in the approximately rectangular tank on the side of the electrical equipment main housing, so that the tap selector 3A and the switching opening/closing The container 4A can be made smaller.

[0006]

[Example] Figure 1 shows an example of the gas insulated electrical equipment of the present invention.
The electrical equipment main body storage section consisting of the iron core 1 and the coil 2 is a substantially rectangular tank 7 that stores the electrical equipment main body together with an insulating gas 5 such as SF6. Tap selector 3A and switching switch 4
The A storage section is a separate chamber of the circular tank 8 that can have a large internal pressure strength, and the sealed pressure of the insulating gas 5A such as SF6 in the circular tank 8 is equal to that of the insulating gas 5 in the approximately rectangular tank on the side of the electrical equipment main body storage section. By setting the pressure higher than the sealing pressure, the dielectric strength is improved, so that the tap selector 3A and the switching switch 4A can be made smaller.

[0007]

According to the present invention, as described above, the tap selector and the switching switch can be made smaller, so that the installation space for the equipment can be reduced.

[Brief explanation of drawings]

FIG. 1 shows an example of gas-insulated electrical equipment of the present invention, (A
) is a plan view, and (B) is a front view.

FIG. 2 shows an example of conventional gas-insulated electrical equipment, (A)
is a plan view, and (B) is a front view.

[Explanation of symbols]

1 Iron core 2 Coil 3, 3A tap selector 4, 4A switching switch 5, 5A Insulating gas 6, 7 Almost rectangular tank 8　Circular tank

Claims (1)

[Claims] Claim 1: In a gas-insulated electrical equipment that houses an electrical equipment main body consisting of an iron core and a coil, a tap selector and a switching switch used to switch taps during load, and an insulating gas, the shape of the tank is adapted to be housed in the electrical equipment main body. The tank side is a substantially rectangular tank, and the tap selector and switching switch housing side is a circular tank in a separate room from the above-mentioned substantially rectangular tank.
Gas insulated electrical equipment in which the internal pressure strength of this circular tank is greater than the internal pressure strength of the substantially rectangular tank.