Dry overall shield insulating tubular bus

A tubular busbar, shielding insulation technology, applied in the direction of insulated cables, insulated conductors, organic insulators, etc., can solve the problems of processing insulation layer, damage, and inability to use common bending angles, etc., to achieve good electrical insulation performance, excellent heat resistance, The effect of excellent water repellency

Active Publication Date: 2014-03-26
南网电气有限公司 +1
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Problems solved by technology

The use of epoxy resin as the insulating layer here has the following disadvantages: 1. After the epoxy resin is cured, the epoxy resin insulating layer becomes hard and brittle, easily damaged by external force and difficult to repair; 2. Insulated tubular busbars made of epoxy resin can no longer be bent. They have a certain shape, and tubular busbars with different bending angles need to be processed

Method used

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  • Dry overall shield insulating tubular bus

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Embodiment Construction

[0008] Combine below figure 1 , the present invention is described in further detail.

[0009] A dry-type fully shielded insulated tubular busbar, comprising a tubular conductive core 11, the conductive core 11 is coated with a first semi-conductive shielding layer 12, an insulating layer 13, a second semi-conductive shielding layer 14, and a grounding shielding layer in sequence from the inside to the outside 20. The outer protective layer 30, the insulating layer 13 is made of organic silica gel. The first semi-conductive shielding layer 12 is arranged on the outside of the conductive core 11 to uniform the electric field and avoid tip discharge caused by sharp corners or burrs on the surface of the conductive core 11; the second semi-conductive shielding layer 14 acts as an insulating shield. The materials of the first and second semi-conductive shielding layers 12 and 14 can adopt common settings. The gist of the present invention is to use organic silica gel as the insu...

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Abstract

The invention relates to the field of power generation, transmission, transformation and distribution devices of power systems, in particular to a dry overall shield insulating tubular bus which comprises a tubular conductive core. A first semi-conductive shield layer, an insulating layer, a second semi-conductive shield layer, a grounding shield layer and an outer protection layer sequentially wrap the outside of the conductive core from inside to outside, wherein the insulating layer is made of organic silicone rubber. The tubular conductive core is high in capacity and small in size, the insulating layer made of the organic silicone rubber has a fine electrical insulating property, dielectric loss, voltage resistance, arc resistance, corona resistance, volume resistivity, surface resistivity and the like of the insulating layer are among the best in insulating materials, the electrical performance of the insulating layer is less affected by temperature and frequency, and the organic silicone rubber insulating layer has excellent heat resistance and water repellency, has a certain flexibility after curing, can be bent and can meet use requirements under different conditions.

Description

technical field [0001] The invention relates to the field of power generation, power transmission, power transformation and distribution devices in power systems, in particular to a dry-type fully shielded insulating tubular busbar. Background technique [0002] With the rapid development of my country's economy, the power supply capacity has increased significantly. The rated current of the low-voltage side of the transformer is also increasing. At present, the capacity of a single 110KV and 220KV transformer reaches 120MVA, the voltage on the low-voltage side is 6.3-13.8KV, and the working current is as high as 5000A-11000A. At the same time, thermal power generation units with a single capacity of 125MW or less in my country are being gradually shut down. 200MW, 300MW and 600MW generating units have become mainstream power generation equipment, their export voltages are 15.75KV, 18KV and 20KV respectively, and their export currents are 8625A, 11320A and 19000A respectiv...

Claims

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Application Information

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IPC IPC(8): H01B5/06H01B7/02H01B3/28
Inventor 余乐升
Owner 南网电气有限公司
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