Glossary beginning with S

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SAIDI

System Average Interruption Duration Index - indicator of the average system duration of a long and very long break (expressed in minutes per Customer)

SAIFI

System Average Interruption Frequency Index - indicator of the average system frequency of long interruptions in energy supply (expressed in the number of breaks per Customer)

SCR installation

Installation of catalytic flue gas denitrification

SO2

Sulphur dioxide

SPOT market

Cash market (spot)