某展馆欠压（失压）保护设计及改进建议

摘要

通过对展馆的失压保护设计及保护动作的影响分析,讨论了在取消低压断路器欠压（失压）脱扣功能的情况下,电网失压后恢复供电及电网欠压运行将带来的危害。针对因电网瞬时波动、闪变、断电等导致低压断路器欠压（失压）脱扣跳闸引起的政治影响及经济损失,以及供电部门恢复供电时手动合闸工作量大、速度慢等情况,提出了低压断路器宜采用延时欠压脱扣器及有压自投的解决方法,从而使低压断路器欠压（失压）脱扣能更好地发挥作用。%Under voltage or no-voltage protection of a certain exhibition and the effect of the protection active was analyzed.The damage brought by the power supply recovering and the under-voltage operation of power network,under the circumstance of canceling the