基于GTO器件特性和故障状态下gto的过流工况，研究了GTO过流分级快速保护模式和实现方法以及保护的极限条件。
GTO over current rapid protection by gradation mode and limited protection conditions are studied based on the features of GTO and over current situation under fault state.
对深孔钻屑组合机床分级进给机构进行改进后，达到了简化结构、方便调整、减少故障的目的。
After the modification of step feed mechanism of deep drill combined machine tool, simplifying structure, convenient adjustment and reducing fault rate have been proved.
完成对网络设备告警的实时处理，包括告警排队、告警分级、告警定位、声音告警提示、告警入库或存文件等基本的故障管理。
Real-time alarms handling, including the queuing, classifying and locating of alarms, sound alarm and saving alarms in database or files.
噪音小、换网快捷、分级细、分选比例大、产量高、分选准确、故障率低、维修方便等优点。
Noise is small, net changers fast, grading fine, sorting larger scale, high output, sorting accuracy, low failure rate and convenient maintenance. Especially suitable for grading use.
噪音小、换网快捷、分级细、分选比例大、产量高、分选准确、故障率低、维修方便等优点。
Noise is small, net changers fast, grading fine, sorting larger scale, high output, sorting accuracy, low failure rate and convenient maintenance. Especially suitable for grading use.
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