目视进离场保护区
visual approach and departure protection area
进离场区
approach and departure surface
进离场分离
arrival and departure separation
进离场管制员
approach and departure controller
常规型距离保护
conventional distance protection
电网的距离保护
transmission line distance protection
非线性距离保护
Non-linear Distance Protection
高频距离保护
high-frequency distance protection
隔离保护
insulating and protecting
工频变化量距离保护
power frequency variation distance protection