TT接地系统,TT grounding system
1)TT grounding systemTT接地系统
2)TT systemTT系统
1.This paper introduces the characteristics of three power supply systems ofTT system,TN system and IT system and their application scopes,and makes the comprehensive comparison on them.简要介绍了TT系统、TN系统、IT系统3种供电系统的特点及适用范围,并进行了综合比较。
2.The advantages and disadvantages of two modes of over voltage protection inTT system,"3+1"mode and "4+1"mode,were analyzed.重点分析了在TT系统实施过电压保护时的两种保护模式——"3+1"模式和"4+0"模式的优劣。
3.The use of PE line in TN system andTT system is analyzed,and the characteristics of lighting return circuit in residence and the advantages of adding PE line are discussed.对PE线在TN系统与TT系统中的作用进行了分析,讨论了住宅内照明回路的特点及增加PE线后的优点。
3)TT groundingTT接地方式
4)local TT system in TN systemTN系统中的局部TT系统
1.This paper expounds several problems about residual current protection devices(RCD),namely,specific application of RCD to IT,TT,and TN systems,similarities and differences between protection of residual current operated devices and zero sequence and its relationship with additional earthing,and relevant problems oflocal TT system in TN system as well.论述了有关剩余电流保护电器(RCD)的几个问题:详细讨论了RCD在IT、TT和TN系统中的具体应用;论述了剩余电流保护与零序保护的异同,与重复接地的关系,以及TN系统中的局部TT系统等相关问题;并介绍了建筑物内多级RCD的装设方案。
5)earthing system接地系统
1.In the paper,an electrical power system of base station is introduced in detail,including AC power supply system,DC power supply system andearthing system.文中介绍了通信基站的电源系统,包括交流供电系统、直流供电系统和接地系统,论述了等电位在基站建设中的重要性。
2.The five types ofearthing systems in low voltage power distribution system were introduced respectively.分别对建筑电气低压配电系统中的5种接地系统进行了详细的介绍,分析了其各自的特点及如何选用。
3.This article introduces relative standards of the traction substationearthing system and analyses the neglected earthing problems and the hidden dangers which exist in construction and operation for a long time.介绍了牵引变电所接地系统的相关标准,分析了长期以来在施工与运营中被忽视的接地问题及存在的安全隐患,并提出了相应建议。
英文短句/例句
1.An effectively grounded system is one in which the coefficient of grounding does not exceed 0.80.有效接地系统是接地系数不超过0.8的系统。
2.earth system of high voltage laboratory高压试验室接地系统
3.resistance-grounded neutral system中心点电阻接地系统
4.The discussion of line-to-neutral voltage regularity and judgment of grounded phase when isolated neutral system is nonmetal grounded中性点不接地系统单相接地时接地相的判断
5.Study on Single Phase Ground Fault Detection in Neutral Resonant Grounded Distribution Networks;谐振接地系统单相接地故障选线研究
6.The Analysis & Handing of Single-Phase Ground Fault in the System with Non-Effectively Earthed Neutral小电流接地系统单相接地故障及处理
7.Grounding means connecting to a lowresistance earth electrode or an excellent earthing system.接地是指与具有低电阻的接地电极或良好的接地系统相联接。
8.Monitor building lightningproof grounding & power grounding systems.监督检查建筑物防雷接地和电力接地系统.
9.Fault Line Selection for the Distribution System with the Adjustable Arc Suppression Coil可调节消弧线圈接地系统单相接地故障选线
10.Discuss on Earthing Protection Scheme in Neutral Grounded with Low-resistance Distributed System中性点经小电阻接地系统接地保护方案探讨
11.The Reaserch of the Line-Selection of Singel-phase Fault of Trickle Earthed System;小电流接地系统单相接地故障选线的研究
12.The Research on Fault Line Selection Non-Solid Earthed Networks;小电流接地系统单相接地故障选线研究
13.Design of the Protection Device of Ground Fault Line Detection for Neutral Low Current Grounded System;小电流接地系统接地选线装置设计与开发
14.An Intelligent Line Selection Instrument of Single Phase to Ground in Small Current Neutral Grounding System;小电流接地系统单相接地智能选线装置
15.Fault Circuit Selection and Fault Location for a Single Phase Fault of Non-Direct-Ground System;小电流接地系统单相接地故障的选线与定位
16.The Studies on the Novel Method of Non-direct-ground System Single Line-to-earth Fault Location;小电流接地系统单相接地故障选线新方法研究
17.Study on Fault Location Method for Single-Phase-to-Ground Fault of Small Current Grounding System;小电流接地系统单相接地故障测距方法的研究
18.Single Phase-to-earth Fault Selection and Location of Small Current Grounded System;小电流接地系统单相接地故障选线与测距
相关短句/例句
TT systemTT系统
1.This paper introduces the characteristics of three power supply systems ofTT system,TN system and IT system and their application scopes,and makes the comprehensive comparison on them.简要介绍了TT系统、TN系统、IT系统3种供电系统的特点及适用范围,并进行了综合比较。
2.The advantages and disadvantages of two modes of over voltage protection inTT system,"3+1"mode and "4+1"mode,were analyzed.重点分析了在TT系统实施过电压保护时的两种保护模式——"3+1"模式和"4+0"模式的优劣。
3.The use of PE line in TN system andTT system is analyzed,and the characteristics of lighting return circuit in residence and the advantages of adding PE line are discussed.对PE线在TN系统与TT系统中的作用进行了分析,讨论了住宅内照明回路的特点及增加PE线后的优点。
3)TT groundingTT接地方式
4)local TT system in TN systemTN系统中的局部TT系统
1.This paper expounds several problems about residual current protection devices(RCD),namely,specific application of RCD to IT,TT,and TN systems,similarities and differences between protection of residual current operated devices and zero sequence and its relationship with additional earthing,and relevant problems oflocal TT system in TN system as well.论述了有关剩余电流保护电器(RCD)的几个问题:详细讨论了RCD在IT、TT和TN系统中的具体应用;论述了剩余电流保护与零序保护的异同,与重复接地的关系,以及TN系统中的局部TT系统等相关问题;并介绍了建筑物内多级RCD的装设方案。
5)earthing system接地系统
1.In the paper,an electrical power system of base station is introduced in detail,including AC power supply system,DC power supply system andearthing system.文中介绍了通信基站的电源系统,包括交流供电系统、直流供电系统和接地系统,论述了等电位在基站建设中的重要性。
2.The five types ofearthing systems in low voltage power distribution system were introduced respectively.分别对建筑电气低压配电系统中的5种接地系统进行了详细的介绍,分析了其各自的特点及如何选用。
3.This article introduces relative standards of the traction substationearthing system and analyses the neglected earthing problems and the hidden dangers which exist in construction and operation for a long time.介绍了牵引变电所接地系统的相关标准,分析了长期以来在施工与运营中被忽视的接地问题及存在的安全隐患,并提出了相应建议。
6)grounding system接地系统
1.Analysis on the line-break status of small resistancegrounding system;小电阻接地系统断线状况分析
2.Study on the new winding cable and itsgrounding system;新型绕组电缆及其接地系统的研究
3.Grounding current detection of low currentgrounding system;小电流接地系统接地电流的检测
延伸阅读
电力系统中性点接地变压器接地电力系统中性点接地变压器接地earthing transformer for neutral groundingd旧n]一x .tong之hongx旧gd一onj旧d一b旧nyoq一j旧d-电力系统中性点接地变压器接地(earthingtransformer for neutral grounding)电力系统中利用接地变压器获得中性点与大地连接，也称中性点辅助变压器接地。当系统中的变压器不具备接人电阻器或接地故障消除器的条件(例如变压器三相绕组为△接线或虽为Y接线但容量不符合要求)时，要利用辅助的变压器提供一个用于接地的中性点。这种变压器应具备零序阻抗低、激磁阻抗大、功率损耗小的特性。绕组为曲折(Z)接线的变压器符合要求，如图1(a)所示。它可以带二次侧绕组，也可以只有一次侧绕组。这种变压器每相由匝数相等的两个串联分绕组组成，每个磁芯上的两个分绕组间以及它们对二次侧绕组的零序互磁为零。很明显，这种变压器的零序电抗XTo只为变压器一次侧绕组的漏电抗Xs，，即XTo-Xs;，而系统中性点与地之间的计算阻抗Z。为Z。一25，+Z。，其中Z。为中性点电阻器或电抗器的阻抗。见图1(b)。2.为激磁阻抗。见图2，YN，d接线的变压器二次侧绕组可以带一定负荷。从过负荷能力考虑已经知道.接YN，d接线的双绕组变压器中性点的接地设备的容t不应超过变压器额定容t的50%.由此可认为，当变压器额定容t按中性点接地设备的容t设计时，允许二次侧绕组带50%额定容t的负荷.还有一种特殊接线的接地变压器和接地设备的组合，是19鲍赫(R.Bauch)发明的，故也称饱鹅变压器，见图3。变压器一次侧中性点直接接地，开口三角形接线的二次侧连接接地设备，这与一次侧中性点接有接地设备是等效的。单相接地时，不对称的电压可分解为对称的正序和零序，磁通也可分解为对应的分量。磁通人m、人。、人.需要极小的激磁电流，并对应于正序电压U.。、U、。、U。。，零序电压UO.对各相是一样的，故三个磁柱中有相同的磁通式，对零序磁通来说，变压器相当一个单相变压器，只不过分裂为3个磁柱和3个绕组，见图3(c)。单相接地时，这种变压器每个分绕组上的电压为少尹z‘一.哟.!|||一下咖l!补丰气l一!{屯犷!{屯享!孟=zl息)一刃川l|拍--l--﹄·图1绕组为曲折(Z)接线的变压器 (a)接线图.(b)零序阻抗图会‘价“相“压，·““”的““是中”点接地“备电流的1/3，即夸。因而变压器的额定功率为3x2‘会‘争即中性点接地设备“率”1.15倍。
