This protection information system with a network function has been put into operation, and the operation and management level of relay protection of cascade hydropower plants is improved.
该网络化的保护信息系统已在实际工作中发挥作用，提高了梯级水电站继电保护现场运行管理的水平。
On August 6th 1988, in Guiyang Power System, a line fault was extended to a cascade shutdown accident because of the mal-operation of a busbar differential protection.
1988年8月6日，由于母线差动保护误动作使线路故障扩大，造成了贵阳电网瓦解的大面积停电事故。
A cascade of rockets menacing cement bunkers illustrates "protection and destruction".
一系列的火箭威胁水泥仓阐明了“保护和破坏”的含义。
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