CESC commissions country’s first underground extra high voltage sub-station

CESC on Thursday commissioned the country’s first underground extra high-voltage sub-station at its Park Circus sub-station located adjacent to the Quest Mall on Syed Amir Ali Avenue.

This state-of-the-art underground EHV substation, first by a utility in India, has been conceptualised, designed and engineered by CESC. The estimated cost is Rs.53 crore. This new Gas-Insulated Substation (GIS) will serve consumers in the Central and South Kolkata.

According to the CESC spokesman, this substation will provide relief to CESC substations in central Kolkata and will also cater to the future load growth in the area.

What makes the new underground CESC substation unique is that it has been constructed within a very limited space of 600 square metre. The building goes 12 metre below the ground level. While the first 75 MVA transformer is ready, the second 75 MVA transformer will be commissioned shortly. Giving further details, the CESC spokesman says, “The new Park Circus underground substation has 7 132 kV Double Bus-bar GIS Bays with unique feature of top-entry cable termination arrangement, the first of its kind in the country at this voltage level, 15 33 kV Double Bus-bar GIS Bays and 2 75 MVA Transformers (the second transformer will be installed shortly).” The challenge to CESC engineers was to build an EHV substation 12 metre below the ground level. We are proud rolling out a path-breaking initiative in power distribution.