JPH0590776U - Solid insulated switchgear - Google Patents

Abstract

(57) [Abstract] [Purpose] Switch unit 2 in solid insulation switchgear
By making the temperature rise values of the currents a, 2b, and 2c during current application uniform for each phase, the current application capability is improved and the capacity is increased. [Structure] Switch units 2a, 2b, 2c are arranged and mounted in one direction on a frame 1 of a solid insulated switchgear. The conductor 3 is connected to the lower part of the opening / closing units 2a, 2b, 2c.
A disconnecting section 4 is provided above the switching units 2a, 2b and 2c and below the conductor 3. Two nonmagnetic heat shield plates 6 are arranged between the phases of the opening / closing units 2a, 2b, 2c and fixed to the frame 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solid insulated switchgear used in an electric circuit, and more particularly to a large capacity switchgear having a large current capacity.

[0002]

[Prior Art]

 2 (A) and 2 (B) are a side view and a rear view showing the arrangement of the switching units 2a, 2b, 2c of an example of a conventional solid-insulated switchgear. The opening / closing units 2a, 2b, 2c for cutting, and the disconnecting section 4 integrated with the opening / closing units 2a, 2b, 2c in which the contacts 5 for inflowing current are built in are attached. A solid-insulated conductor 3 for conducting a current is connected to the lower part of the switching units 2a, 2b, 2c, and a disconnecting portion 7 having a built-in contact 8 for discharging a current is provided at the lower end of the conductor 3. It is provided. Each switching unit 2a, 2b, 2c has an appropriate interphase dimension so as not to be affected by heat from the switching units of other phases.

[0003]

[Problems to be solved by the device]

 In the above-mentioned prior art, in order to prevent the temperature rise value due to the heat generated due to the increase in capacity of the solid insulation switchgear from exceeding the temperature rise limit of the switchgear set in the standard, the switchgear units 2a, 2b, It is necessary to increase the interphase dimension of 2c so that it is less likely to be affected by the heat from the switching units of other phases. Therefore, the width dimension of the frame 1 to which the switching units 2a, 2b, 2c are attached becomes large, and the switching device Has the drawback of becoming larger. In addition, when prioritizing miniaturization of the switchgear, the current carrying capacity of the switchgear units 2a, 2b, 2c is inevitably reduced, and therefore the switchgear units 2a, 2b, 2c are increased in order to increase the capacity. There is a drawback that the whole switchgear becomes expensive because it needs to be cooled with a special cooling device. Therefore, in this invention, the switch units 2a, 2b, 2c of the solid-state switchgear are made less susceptible to the heat from the switch units of other phases.

[0004]

[Means for Solving the Problems]

 According to the first aspect of the present invention, a non-magnetic heat shield plate is installed between each phase of the switch unit of the solid insulated switchgear. According to the second aspect of the present invention, a plurality of nonmagnetic heat shield plates are provided between the phases of the switch unit of the solid insulation switchgear, and an air layer is provided between the heat shield plates.

[0005]

[Action]

 In the solid-state switchgear according to claim 1 configured as described above, the heat generated from the switchgear is less likely to be transferred to the switchgear of another phase adjacent thereto. In particular, the switchgear located in the center has the highest temperature rise value because it is affected by heat from the switchgear on both sides, and the energizing capacity of the switchgear is also the maximum temperature rise value of this middle-phase switchgear unit. However, the installation of the heat shield plate makes the temperature rise value of the switching unit of each phase almost uniform. By using a non-magnetic material for the heat shield plate, it is possible to prevent unnecessary heat generation of the heat shield plate itself due to the magnetic field generated by the current flowing in the switching unit. In the solid insulated switchgear according to the second aspect of the present invention, a plurality of the heat shield plates are installed between each phase of the switch unit, and an air layer provided between the heat shield plates provides heat insulation operation, thereby providing the switch unit. The temperature rise value of each phase can be made more uniform.

[0006]

【Example】

 1 (A) and 1 (B) are a side view and a back view of a solid-state insulation switchgear according to an embodiment of the present invention. 2a, 2b, 2c and a contactor 5 for inflowing a current are provided, and a disconnecting section 4 integrated with the switching units 2a, 2b, 2c is provided, and solid insulation is provided below the switching units 2a, 2b, 2c. The current-carrying conductor 3 is connected, and a disconnecting section 7 containing a current-flowing contact 8 is provided at the lower end of the conductor 3. Between the phases of the switching units 2a, 2b, 2c of each phase, two non-magnetic heat shield plates 6 are provided with an air layer interposed between them, so that current flows through the switching units 2a, 2b, 2c. The heat generated when it flows is prevented from being transmitted to the switching unit of the other phase adjacent to it.

[0007]

[Effect of the device]

 The non-magnetic heat shield plate 6 is installed between the switching units 2a, 2b, 2c of each phase of the solid insulated switchgear, so it is generated when current flows through the switching units 2a, 2b, 2c. Since the heat generated is less likely to be transmitted to the switch units of the other phases adjacent to each other, the temperature rise values of the switch units 2a, 2b, 2c of each phase become substantially uniform, and the temperature rise values of the switch units 2a, 2b, 2c are relatively relatively increased. The same effect can be obtained when the value decreases. Further, when a plurality of nonmagnetic heat shield plates 6 are installed between the switching units 2a, 2b, 2c of each phase, and an air layer is provided between each heat shield plate 6, the air layer Due to the adiabatic operation, the temperature rise value becomes more uniform, and the solid insulated switchgear can be made compact and have a large capacity. By making the heat shield plate 6 a non-magnetic material, it is possible to prevent unnecessary heat generation of the heat shield plate 6 itself due to the magnetic field when current is applied, and a great effect can be obtained.

[Brief description of drawings]

FIG. 1 is a view showing an example of a solid insulation switchgear of the present invention. "(A) is a figure which shows the side surface, (B) is a figure which shows a back surface."

FIG. 2 is a diagram showing a general example of a conventional solid insulated switchgear. "(A) is a figure which shows the side surface, (B) is a figure which shows a back surface."

[Explanation of symbols]

 1 frame 2a opening / closing unit 2b opening / closing unit 2c opening / closing unit 3 conductor 4 disconnecting section 5 contactor 6 heat shield plate 7 disconnecting section 8 contactor

Claims (2)

[Scope of utility model registration request] 1. A solid insulated switchgear for energizing and switching on / off a current, wherein a nonmagnetic heat shield plate is installed between each phase of switchgear units arranged in one direction and adjacent to each other. 2. The solid insulation switchgear according to claim 1, wherein a plurality of nonmagnetic heat shield plates are provided between each phase of the switch units arranged in one direction and close to each other, and an air layer is provided between the heat shield plates. ..