The necessity of appending special protective device for middle and low voltage busbars in important consumers " substation and that in electrical auxiliary system of power plant is disserted 因此有必要研制一种造价低、原理简单、适用于中低压母线的专用母线保护。
In this paper . firstly , the new busbar protection theory of medium voltage system have been introduced and summarize , the feasibility of theory also demonstrated 接着在对小电流接地系统中特殊情况下的母线保护展开分析，并对其基本理论基础和可行性进行了充分的论证。
The current transformer is busbar type . the secondary windings and iron core are enclosed in a plastic crust . the middle hole is used for busbar going through and mounting 本型电流互感器为母线式。二次绕组及铁芯均封装在阻燃塑料壳内，中间窗孔供一次母线穿过及安装用。
The series of current transformers are resin insulated ， fully enclosed and busbar type . the iron core is circular and the secondary winding goes around the core before casting by epoxy 本型电流互感器的铁心为圆环形，二次绕组匀绕制在铁心圆周上，用环氧树脂混合料浇注成形。
The current transformer is fully enclosed and busbar structure . the secondary windings and iron core are insulated by epoxy resin . it has a good ability of antipollution and moisture proof 本型电流互感器为全封闭母线式结构，二次绕组及铁芯均浇注在环氧树脂内，耐污染及潮湿。
There are some advanced studies on power supplies schemes for eoct in this thesis , which based on a new type of eoct for 220kv busbar researched by the laboratory 论文在本教研组研制的一种新型的220kv混合式光电电流互感器的基础上，对光电电流互感器的供能问题进行深入的研究。
According to actuality of the busbar protection for the mostly plant and country terminal substation in our country , a new theory for busbar protection in medium transmission or distribution power system 本文针对现有广大的工厂以及农村终端变电所母线保护的现状而提出了中压母线综合保护的原理。
Aimed at the existing theory of the busbar protection , especially for busbar protection criterion in medium and low power system , this paper bring forward a new theory based on the currents of two phases 本文就现有的母线保护原理，特别是中压系统母线保护的判据进行了较为深入的分析，并在此基础上提出了基于两相电流差的母线综合保护原理。
The principle of rectifies type , medium impedance type , and microprocessor - based busbar protection was analyzed . several kinds of busbar protection features and their attention points in service were expounded 摘要对整流型、中阻抗型、微机型等母线保护原理进行了分析，阐述了几种母线保护的各自特点，并提出母线保护在运行和维护中的注意事项。
In addition , in order to protect the circuit in the condition of high current in the busbar , the design plan is added by high voltage protect circuit and voltage monitor and control circuit and power discharge circuit 另外，为了防止在母线大电流情况下，特制线圈感应电压过大导致后端电路烧毁，为电路增加了过电压保护、电压监控保护和能量泄放电路，起到保护器件的作用。
