Permissive underreach protection允许式欠范围保护

overreach or underreach动作区延长或缩短

underreach pilot protection欠范围式纵联保护

ermissive underreach protection允许式欠范围保护

Intertripping underreach protection远方跳闸欠范围保护

permissive underreach distance protection欠范围允许式距离保护

underreach distance protection equipment欠范围距离保护装置

permissive underreach distance protection system允许式欠范围距离保护系统