建筑群防雷设计的补充准则.doc

Additional criteria for designing lightning protection of a complex of structures (LPCS)
建筑群防雷设计的补充准则
Abstract: The paper discusses some functional criteria for the design and installation of Lightning Protection of Structures (LPS) with reference to a case study of a complex of strategic buildings. Considering the special cases of strategic structures like hospital, military and government buildings, in the assessment of the risk of damage by lightnings, the paper suggests an additional criterion, that assigns a suitable weight to the need of maintaining the service and the functionality of the structures, after a lightning stroke. Considering the case of complexes of structures in close areas, the paper highlights the characteristics of functional interdependence and interference in lightning interception and it suggests a coordinated and integrated design of Lightning Protection of Complexes of Structures (LPCS).
Keywords: LPS, risk management
摘要：本文通过一个重要建筑群体的个例分析讨论了建筑物防雷装置设计和安装的一些实用性准则。对于医院、军用或政府办公楼等重要建筑物，在评估雷击损害风险时，应适当考虑每次雷击后设备及建筑物功能的维修需求。对于紧凑的建筑物群，强调了对拦截闪电的相互联系，提出了建筑群防雷的相互配合的整体设计方法。
关键词：防雷装置、风险管理

A call to Standardize the Waveforms used to Test SPDs
Abstract: This paper reviews the history of test waveforms used in SPD testing. The source ofeach of the major waveforms was identified as well as the technical data which supported its use. Various lightning-measurement efforts that have been undertaken around the world were surveyed to see if any parameters could be imputed to a typical lightning strike. The results
show the 10/350 waveform to be an inappropriate waveform for simulating actual lightning in the laboratory.
Keywords: Class I test, SPD test waveforms, 8/20µs, 10/350µs, W/R

Lightning protection standard in Mexico based on IEC-1024 and practical aspects
Abstract: The objective of this work is to show the philosophy of protection used for the Mexican Lightning Protection Standard (MLPS) still in progress, based on IEC 1024 [1],stressing the limitations in the scopes of the standards used in its elaboration, how the practical aspects gathered by experience of engineering groups in Mexico are incorporated to the MLPS without breaking IEC criteria and to discuss why the Internal Lightning Protection
System in the MLPS should be mandatory.
Keywords: Lightning, Lightning Protection System, Mexican Lightning Protection Standard

Protection against lightning overvoltages of electrical and electronic systems: Evaluation of the protective distance of an SPD
Abstract: The paper deals with the evaluation of the protection distance of a Surge Protective Device (SPD) in order to be effective in the reduction of the probability of failure of electrical and electronic systems within a structure. Surges due to flashes to the structure, to ground near the structure and to the entering lines are considered. By computer simulation (PSPICE and Power Systems Simulink of Matlab) the protection distance is evaluated as function of different influencing parameters. Simple relations are proposed to evaluate the protection distance of an SPD to be effective against overvoltages due to resistive and inductive coupling with lightning current.
Keywords: Lightning Protection, Surge Protective Device, Lightning Equipotential Bonding

A Critical View on the Lightning Protection International Standard
Abstract. The Technical Committee TC81 (Lightning Protection) of the IEC (International Electrotechnical Commission has finalised the new presentation of its work in five parts (IEC 62305-1 to -5) treating general principles, risk management, physical damage, life hazards, protection against electrical and electronic systems within structures and some services entering the structure. We criticise some options retained.
Keywords. Lightning Protection, Standardization.