住宅电气安全（等电位）.doc

住宅电气安全（等电位）（一）
作者：***
等電位聯結，顧名思義，是“使各外漏可導電部分和裝置外可導電部分電位基本相等的電氣連接”。通常把等電位聯結分為三個層次，即總等電位聯結(Mai Equipotential Bonding)、局部等電位聯結(Local Equipotential Bonding)和輔助等電位聯結(Supplementary Equipotential Bonding)，即是IEC的最新觀念，也是為了實際工作中好操作，並且不同層次，連接導體面積也不同。總等電位聯結是在建築物每一電源進線及進出建築物的金屬管道、金屬結構構件連成一體，一般有總等電位聯結端子板，由等電位聯結端子板放射連接或鏈結。輔助等電位聯結一般是電氣裝置的某部分接地故障保護不能滿足切斷回路的時間要求時，作輔助等電位聯結，把兩導電部分之間聯結後能滿足降低接觸電壓，滿足R≤50/Ia(R—可同時觸及的外露可導電部分和裝置外可導電部分之間，故障電流產生的電壓降引起接觸電壓的一段線段電阻，單位為歐
Residential electrical safety (and other potential) (a)
Analysis: ***
Equipotential bonding, by definition, is "to enable the leakage of conductive parts and devices of conductive parts of electrical potential is basically the same connection." Equipotential bonding usually are divided into three levels, namely general equipotential bonding (Mai Equipotential Bonding), local equipotential (Local Equipotential Bonding) and supporting other potential connection (Supplementary Equipotential Bonding), which is the latest concept of IEC is In order to operate well in practical work, and at different levels, connecting conductor area is also different. Equipotential Bonding at the building line and out of each power supply into the building's metal pipes, metal structural elements fused, generally the total equipotential bonding terminal board, terminal board radiation equipotential bonding connection or link. Supplementary equipotential bonding is usually a part of electrical installations to meet earth fault protection can not be cut off loop of the time requirements for supplementary equipotential bonding, the connection between two conductive parts to meet the reduction after the contact voltage, satisfy R ≤ 50/Ia (R-can simultaneously touch the exposed conductive parts and devices, can be between conductive parts, fault current the voltage drop caused by contact with a line voltage resistance unit in Europe
 

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