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About This Item
Full Description
This part of IEC 62271 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.
The seismic qualification of the switchgear and controlgear assemblies takes into account testing of typical switchgear and controlgear assemblies combined with methods of analysis.
Mutual interaction between directly mounted auxiliary and control equipment and switchgear assemblies is considered.
Seismic qualification philosophy includes selection of seismic qualification level (Clause 4), methodologies for qualification by testing (Clause 5) and by combined testing and analysis (Clause 6), acceptance criteria (Clause 7) and seismic qualification documentation (Clause 8).
Recommendations on increasing the seismic adequacy of switchgear and controlgear assemblies are provided in Annex B. A flowchart of the seismic qualification process is included in Annex C.
The seismic qualification of switchgear and controlgear assemblies by the manufacturer is performed usually if needed.
Document History
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IEC 62271-207 Ed. 3.0 b:2023
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High-voltage switchgear and controlgear - Part 207: Seismic qualification for gas-insulated switchgear assemblies for rated voltages above 52 kV- Most Recent
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IEC 62271-207 Ed. 2.0 b:2012
High-voltage switchgear and controlgear - Part 207: Seismic qualification for gas-insulated switchgear assemblies for rated voltages above 52 kV- Historical Version
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IEC 62271-207 Ed. 1.0 b:2007
High-voltage switchgear and controlgear - Part 207: Seismic qualification for gas-insulated switchgear assemblies for rated voltages above 52 kV- Historical Version