T'puram: KSEB has decided to upgrade the 220kV substation at Edamon, a critical grid substation in south Kerala, into a 400kV gas insulated substation (GIS) at a cost of Rs 403.50 crore.

design and reservation of manufacturing capacity for long lead equipment for 400 / 132 kV SF6-free EconiQ® Gas Insulated Switchgear (GIS) substations and related systems in the Western Isles ...