又黄又硬又湿又刺激视频免费丨91超碰在丨女神思瑞女神久久一区二区丨亚洲综合另类丨久久亚洲精丨波多野结av衣东京热无码专区丨国产av导航大全精品丨九个美女露脸撒尿嘘嘘视频丨伊人成综合网丨国产黄色激情视频丨亚洲一区精品无码色成人丨五月av丨久久成人国产精品一区二区丨av卡一卡二丨亚洲精品成人久久丨公妇乱淫太舒服了丨国产精品无码制服丝袜丨成人激情综合丨极品粉嫩国产丨成人在线免费高清视频丨高清国产一区二区三区在线丨奶真大水真多小荡货av丨免费黄色小视频在线观看丨日韩成人小视频丨亚洲黄av

Tridimensional Toroidal-Core transformers

The body of S13 tridimensional toroidal-core power transformers is in the shape of triangular prism with tensile rods set up in the middle and around, which is insulated from upper and lower iron yoke and could form a unity with laminated boards. Thus it can firmly resist axial and radial mechanical stress when sudden short circuit happens. According to National Standard GB/T6451 “Specification and technical requirements for three-phase oil-immersed power transformers”, the no-load loss of S13 tridimensional toroidal-core power transformers of 30-1600kVA has averagely decreased 50%. At present the S13 tridimensional toroidal-core transformers implement the following standards: GB/T25438 “Specification and technical requirements for three-phase oil-immersed tridimensional toroidal-core distribution transformers” and GB/T20052 “Minimum allowable values of energy efficiency and energy efficiency grades for three-phase distribution transformers”. Due to the characteristics of high quality of toroidal core and winding production, the no-load current of S13 tridimensional toroidal-core power transformers has averagely decreased 75%. The S13 energy-saving transformers of the corporation can save 15% to 30% of energy comprehensively, compared with ordinary transformers. At the same time, the S13 transformers are innovatively designed to be theft proof and suitable for countryside power system. Meanwhile, the transformers are more stable and have 5 to 8 years longer life span and 15Db less noise than ordinary transformers according to JB/T10088 noise standard.