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Analysis and improvement of a 330 kV circuit breaker\'s non-fault trip
Author(s): 
Pages: 119-120
Year: Issue:  5
Journal: Relay

Abstract: 针对330 kV断路器一起分相跳闸事故,分析了跳闸因保护永跳回路电缆过长、分布电容过大在直流接地时发生"偷跳",提出了长电缆跳闸回路应增大出口中间继电器的动作功率,并使其动作电压大于60%而小于70%的额定直流电压,在设计电缆的走向时,应将启动跳中间继电器的的电缆(操作箱R端、Q端所接电缆)远离强干扰源.
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