gis(国外英文资料).doc

gis(国外英文资料) The characteristics of GIS equipment 1, small Due to the use of sulfur hexafluoride gas insulated six excellent performance insulation and arc extinguishing medium, so it can greatly reduce the size of the substation, realize miniaturization. Voltage (KV) equipment category covers an area of?? (M2) comparison of percentage? 500?? conventional equipment? 4944? 25.02 GIS? 1237? 330?? conventional equipment? 2989? 28.77 GIS? 860? 220?? conventional equipment? 1105? 37.01 GIS? 409? 110?? conventional equipment? 358? 45.81 GIS? 164? 2, reliability and safety Because live parts are completely sealed in an inert gas in SF6, not in contact with the outside, is not affected by the external environment, greatly improving the reliability. In addition, because all the elements are combined into a whole, has excellent earthquake resistant performance. Because the metal shell charged part of the seal in the grounding body, so there is no risk of electric shock. SF6 gas for combustion gas, so no fire hazard. Because the charged part closed to the metal shell, small noise of electromagnetic and electrostatic shielding, and anti radio interference ability. 3, installation and maintenance Short installation period. Because of the realization of miniaturization, assembling and test can be qualified in the factory, the unit or the interval form of delivery to site, so the site can shorten the installation period, but also can improve the reliability of. Because of its rational layout, advanced arc system, greatly improve the service life of the product, so long maintenance cycle, maintenance workload is small, but because of the small, low ground, therefore convenient daily maintenance. The structure and main components Circuit breaker Composition of circuit breaker assembly consists of three-phase common box type circuit breaker and operating mechanism. Each phase of the interrupter insulating tube is sealed and independent. The interrupter is single type, with an axial s