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。
2
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。
3
A cascade of rockets menacing cement bunkers illustrates "protection and destruction".