?超范围允许式
...,其构成方式有2种:由距离保护Ⅰ段动作键控发讯的叫欠范围允许式(PUTT),由距离保护Ⅱ或Ⅲ段键控发讯的叫超范围允许式(POTT),其原理示意图见图6。
?跳闸方式
保护方案是基于方向判别的超范围允许传送跳闸方式(POTT),为适应一侧无电源或弱电源馈电要求,该微机型保护装置还设置了转发跳频和弱馈跳闸电路。
?传输跳闸
...ELOP=Y1 当发生PT断线时LOP=1,ILOP=1,闭锁方向元件和距离元件,方向零序过流元件也被闭锁,另外, 允许超范围传输跳闸(POTT)逻辑中的键控和回音键控(keying和echo keying)也被闭锁。
?脊柱结核
感染性:脊柱结核(POTT)
卜舫济
Pott's fracture
卜其吉
Audrie's father Lawrence Pott pleaded with witnesses to come forward at a San Jose news conference.
NPR: Lawyer: Assaulted Teen Had Drawings, Name On Body
But in this case, Pott's family wanted her name and case known, Allard said.
NPR: 3 Teens Arrested For Assault After Girl's Suicide
On the day Pott died, Saratoga High School principal Paul Robinson announced her death, stunning classmates.
英汉双解词典包含3185865条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。