India, Nov. 4 -- The construction of two key substations of Haryana Vidyut Prasaran Nigam Limited (HVPNL) in Gurugram has been delayed by nearly six to eight months after the Centre for Air Quality Management (CAQM) penalised construction firms for flouting pollution control norms, officials said on Monday.

One of the substations, a 220kV unit in Sector 99 along the Dwarka Expressway, is aimed at strengthening the power supply infrastructure for the city's fast-developing residential sectors.

The other, a 66kV substation in Sector 37D, is meant to improve power quality and reduce outages in the industrial area. Both substations are based on gas-insulated switchgear (GIS) technology, which is compact and considered safer. Both the sites ...