IEC 62271-207:2023 applies to – gas-insulated switchgear (GIS) assemblies – for alternating current of rated voltages above 52 kV complying with IEC 62271-203, and – for direct current of rated voltages including and above 100 kV, – for indoor and outdoor installations, including their supporting structures, – AC metal-enclosed switchgear and controlgear assemblies for rated voltages above 1 kV and up to and including 52 kV complying with IEC 62271-200, ground or floor mounted, intended to be used under seismic conditions, and – AC solid-insulation enclosed switchgear and controlgear assemblies for rated voltages above 1 kV and up to and including 52 kV complying with IEC 62271-201, ground or floor mounted, intended to be used under seismic conditions. This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. It also cancels and replaces, through merging, the first edition of IEC TS 62271-210 published in 2013. This edition includes the following significant technical changes with respect to the previous edition: a) modification of the minimum voltage rating from 52 kV to above 1 kV in order to include medium voltage equipment previously being within IEC TS 62271-210 scope; b) further harmonisation of qualification procedures with the revised IEEE Std 693-2018 [1], Annex A and Annex P, including 1) matching this document’s required response spectra with IEEE Std 693-2018 performance level spectra and IEC TS 62271-210 spectra, 2) addition of a step-by-step procedure assisting the user of this document to select an appropriate seismic qualification level combining seismic integrity with cost-effective design, 3) addition of analytical earthquake component combination techniques, and 4) reference to publicly available accelerograms specially developed to match the IEEE Std 693-2018 spectra for testing and analysis purposes, since this document and IEC TS 62271-210 spectra are identical in shape with IEEE Std 693 spectra. c) various enhancements of test procedures; d) addition of minimum contents for seismic qualification reports; e) scope extended to cover DC GIS including and above 100 kV.<\/p>\n
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| 1<\/td>\n | 30485189 <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | A-30432259 <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Annex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | 4 Seismic qualification requirements 4.1 Seismic qualification objective 4.2 Qualification levels Tables Table 1 \u2013 Seismic qualification levels for switchgear and controlgear assemblies \u2013Horizontal severities <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | Table 2 \u2013 Comparison of qualification levels between various standards <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | Figures Figure 1 \u2013 Required response spectrum (RRS) for qualification level AG2.5 (ZPA = 0,25 g) Figure 2 \u2013 Required response spectrum (RRS) for qualification level AG5 (ZPA = 0,50 g) <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | 4.3 Selection of seismic qualification level 4.3.1 General 4.3.2 Estimation of site-specific seismic hazard level Figure 3 \u2013 Required response spectrum (RRS) for qualification level AG10 (ZPA = 1,00 g) <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | 4.3.3 Effect of building response and elevation 4.3.4 Soil-structure interaction 5 Qualification by test 5.1 General <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | 5.2 Mounting 5.3 Test parameters 5.3.1 Measurements 5.3.2 Frequency range <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | 5.3.3 Parameters for resonant frequency search 5.3.4 Parameters for time history test (seismic load test) 5.4 Testing procedure 5.4.1 General 5.4.2 Inspection and functional checks <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | 5.4.3 Resonant frequency search 5.4.4 Time history test (seismic load test) <\/td>\n<\/tr>\n | ||||||
| 75<\/td>\n | 6 Qualification by combined test and numerical analysis 6.1 General 6.2 Dynamic and functional data <\/td>\n<\/tr>\n | ||||||
| 76<\/td>\n | 6.3 Numerical analysis 6.3.1 General 6.3.2 Analytical earthquake component combination techniques <\/td>\n<\/tr>\n | ||||||
| 77<\/td>\n | 6.3.3 Static analysis for rigid equipment 6.3.4 Static coefficient analysis 6.3.5 Dynamic response spectrum analysis <\/td>\n<\/tr>\n | ||||||
| 78<\/td>\n | 6.3.6 Time history analysis 6.4 Analysis by experience or similarity <\/td>\n<\/tr>\n | ||||||
| 79<\/td>\n | 7 Evaluation of the seismic qualification 7.1 Combination of loads and stresses <\/td>\n<\/tr>\n | ||||||
| 80<\/td>\n | 7.2 Validity criteria for the seismic waveform and the seismic test 7.3 Structural and functional evaluation of the test results 7.3.1 Common criteria for HV switchgear and MV switchgear 7.3.2 HV switchgear <\/td>\n<\/tr>\n | ||||||
| 81<\/td>\n | 7.3.3 MV switchgear 7.4 Allowable stresses 7.5 Criteria of model acceptance 7.6 Acceptance criteria of the analysis results by similarity <\/td>\n<\/tr>\n | ||||||
| 82<\/td>\n | 8 Documentation 8.1 Test report 8.2 Analysis report <\/td>\n<\/tr>\n | ||||||
| 83<\/td>\n | Table 3 \u2013 Summary of maximum stresses, loads etc. <\/td>\n<\/tr>\n | ||||||
| 84<\/td>\n | 8.3 Analysis report when analysis is performed by similarity Table 4 \u2013 Example of summary of maximum stresses, loads etc. <\/td>\n<\/tr>\n | ||||||
| 85<\/td>\n | Annex A (normative)Characterisation of the test-set A.1 Low-level excitation A.1.1 General A.1.2 Test method A.1.3 Analysis A.2 Determination of the damping ratio by testing A.2.1 General A.2.2 Determination of the damping ratio by free oscillation test <\/td>\n<\/tr>\n | ||||||
| 86<\/td>\n | Figure A.1 \u2013 Monogram for the determination of equivalent damping ratio <\/td>\n<\/tr>\n | ||||||
| 87<\/td>\n | A.2.3 Determination of the damping ratio by measuring the half-power bandwidth A.2.4 Determination of the damping ratio by curve fitting to frequency response methods A.2.5 Determination of the damping ratio by time domain curve fitting <\/td>\n<\/tr>\n | ||||||
| 88<\/td>\n | Annex B (informative)Criteria for seismic adequacy of enclosed switchgearand controlgear assemblies B.1 General B.2 Foundations B.3 Methods for anchoring equipment to foundations <\/td>\n<\/tr>\n | ||||||
| 89<\/td>\n | B.4 Interconnection to adjacent equipment B.5 Use of bracings on switchgear structure <\/td>\n<\/tr>\n | ||||||
| 90<\/td>\n | Annex C (informative)Qualification process flowchart Figure C.1 \u2013 Qualification process flowchart <\/td>\n<\/tr>\n | ||||||
| 91<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. High-voltage switchgear and controlgear – Seismic qualification for gas-insulated switchgear assemblies, metal enclosed and solid-insulation enclosed switchgear for rated voltages above 1 kV<\/b><\/p>\n |