Gaoya dianqi, 1989 高压断路器临修故障跳闸次数的规定对电力系统安全运行影响较大。跳闸次数多了,断路器额定开断容量要下降,甚至灭不了弧,有发生断路器爆炸的危险;如果次数过于频繁,又会造成人力和物力上的浪费,两者都是不可取的。 一、影响断路器故障跳闸次数的因素 长期以来,电力部门对于变电站运行的少油断路器一般规定为故障跳闸3～5次检修一次,和断路器油质变黑后进行检修 ...
刘少伟
doaj
Gaoya dianqi高压断路器是电力系统中重要的保护和控制设备。高压断路器可以采用弹簧机构来执行分闸动作，断路器分闸时间是指处于合闸位置的断路器，从弹簧机构分闸脱扣器带电时刻到所有各极弧触头分离时刻的时间间隔。弹簧机构分闸脱扣器动作时间在断路器分闸时间中占比50%左右，通过改变弹簧机构分闸锁扣器动作时间是调整断路器分闸时间关键因素。为有效调整断路器分闸时间，文中根据断路器分闸动作的原理，以高压断路器用弹簧机构分闸锁扣系统为研究对象，采用机械动力学仿真计算分析方法，分析分闸锁扣系统对断路器分闸时间的影响 ...
惠勇锋 +10 more
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[Facial scarless surgical approach for mandibular condyle fracture]. [PDF]
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Nan Fang Yi Ke Da Xue Xue BaoTao H, Liang F, Huang W, Fan S, Zeng P.
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Gaoya dianqi, 1959 一、导言 本文将讲座对大容量断路器所提出的要求并將报导以特別有效的方式满足了这些要求的新型大容量断路器。该断路器与同一电压和断流容量的其他断路器相此,重量很輕,体积很小,它的电压范圍为6—30千伏,額定断流容量为100—600兆伏安,并经试验证明共性能良好。所以,这样的結構原理在更高电压和更大断流容量的断路器中仍可应用。 二、大容虽断路器的基本原理 大容量断路器基本上可按两种不同的原理制成,即:
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[Lipid metabolomics-based biomarker analysis of neonatal sepsis in serum and cerebrospinal fluid]. [PDF]
Se PuWu WX +5 more
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[Short-term effecetiveness of endoscopic lumbar discectomy combined with annular suturing in treatment of lumbar disc herniation]. [PDF]
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