News of network of global electric machinery: Mother of small car of Man of Lai of fade of coil up of rotten Shen ⒌ crashs an uncut jade is firm brags of stalk of ⒄ of silk ribbon makes an appointment with of Xi exuviate to kill of land of of remnant of of ⑻ Gou whistle to hang v/LIT an amphora-like jar] provide for Xiang barefooteds " say fat car flinchs Wu of Su of postscript shank T
Insulating material already was improved, in order to increase strength of electric field of its place susceptive. For example, rotate the right working voltage of electric machinery, increase one times about in 20 years of in the past.
New insulation medium already was introduced, for example, the development that the application of SF6 brings about SF6 breaker, GIS and GIT to wait, admirable insulation property and advanced technology make its can be on high-pressured cable, insulator and equipment of other high pressure application.
Recently, existing technology already was applied at a kind of new field, use at losing the high-pressured cable technology of distribution, already regarded high pressure as winding in dynamo and transformer now, cause a kind of new-style high pressure dynamo: PowerformerTM, new wind-force generates electricity system: WindformerTM and transformer of the electric power that do not have oil: DryformerTM from this and generation.
The article will introduce the newest development of this kind of dynamo and transformer insulation system in detail, special overweight is mixed traditionally between new facility insulation system and insulation character quite.
Power cable technology
Power cable technology already had very long history, from 19 centuries 80 time use white-hot lighting system extensively to already began. 20 centuries are earlier, already built the subterranean electrification establishment of good use insulated cable.
In original cable, air is main insulation medium, equipment of other underground cable uses such as glue of natural balata, the bark of eucommia, oil and olefin, hemp, cotton, colophony and bitumen, use paper of mineral oil macerate later. As the requirement taller and taller voltage, to prevent partial discharge happens inside space, developed oil-filled cable thereby. Today, be defeated by the cable of two great electric power that basically uses in distribution system: Cable of liquid macerate paper and squeeze a polymer cable. Squeezing a cable to be isolated from is first from thermoplastic polyethylene begins, but very fast by chemical cross-linking polyethylene (XLPE) replace, from this occupational whole industry. Now, XLPE is used generally at subterranean distribution system, as a result of the significant progress of this kind of technology, change transformer application to very quickly the domain.
Nowadays, the main part of power cable is the insulation that has layer of two half electric conduction by conductor, inside and outside and jacket composition. Conductor by many copper or aluminum steel make it, enclothe this conductor with insulating material next, be in finally insulation is adscititious on metallic sheath. The new application of cable technology
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