3. Constraints specific to SEM devices
Compared with air-insulated equipment, SEM switchgear warrants special precautions in terms of design, installation and operation. These particularities mainly concern grounding circuits, the location of internal fuses, the operation of disconnectors, dielectric strength tests after on-site assembly and the use of SF 6 .
3.1 Grounding and loopback circuits
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The importance of grounding enclosures covers both functional and personal safety aspects. There are two possible grounding methods:
single-point earthing of an enclosure section, which must be isolated from adjacent sections;
multi-point...
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Constraints specific to SEM devices
Personal safety
Bibliography
Articles
International standards and technical reports
- Sectionneurs et sectionneurs de terre à courant alternatif. - CEI 60 129 - 1984
- Spécifications et réception de l'hexafluorure de soufre neuf. - CEI 60 376 - 1971
- Guide relatif au contrôle de l'hexafluorure de soufre (SF6) prélevé sur le matériel électrique. - CEI 60 480 - 1974
- Appareillage sous enveloppe métallique à isolation gazeuse de tension assignée égale ou supérieure...
French regulations
Metal-clad switchgear manufacturers
ABB Energie S.N.C., Établissement de Persan.
ALSTOM Transmission et Distribution SA, Postes Blindés Haute Tension, Aix-les-Bains.
Schneider Electric High Voltage SA, Site B1, Grenoble.
SIEMENS SAS, Division Énergie, Saint-Denis.
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