自动转换开关电器作为低压配电系统中保证供电连续性的典型器件,其自身短路性能直接影响系统的可靠性。通过对额定短时耐受电流、额定短路接通能力和额定限制短路电流等三项指标进行分析,阐述了自动转换开关电器短路性能指标在系统可靠性设计中的重要性,并对其合理应用作了指导。%Automatic transfer switching equipment which ensure the power supply continuity as the typical device of low-voltage power distribution, its short circuit performance index impact the system reliability directly. The rated short time withstand current, rated short time making capacity and rated conditional short circuit current were analyzed, the importance and fair use of ATSE＇s short circuit performance index in system reliability design were also discribed.
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