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Project Brief:

One of the largest power transmission companies in the world with best experienced human resources to handle gigantic transmission network, PCIL’s primary business is bulk transmission of Power through its (765/400/220 /132kV) EHV AC / (±500kV) HVDC¬ transmission network. Transmission Availability is maintained at >99%. It has world class standards in O&M and Project Execution.

Sterling and Wilson was part of the construction of 220 kV green field substations at Mariani and 132 kV bay extension works at Imphal, Mokakchung, P.K. bari on turnkey basis.

This is part of strengthening of various substations and set up of new 220 kV substations at various locations of NER by POWERGRID, India’s largest Electric Power Transmission utility. Supervision control and data acquisition system (SCADA) is used for control and monitoring entire site operation. It also collects and process data from all load dispatch center. Through this Mariani substation is connected with their central control at Gurgaon.

Our Scope:

Engineering, procurement, Erection, Testing and Commissioning of 220 kV green field Sub-station consist of 6 nos bays at Mariani & 5 Nos. 132 KV Bay extension in turnkey basis. Scope includes supply of 220 kV and 132 kV substation equipment, complete Civil work such construction of various foundations, control room building, quarters, transit camp, security barrack, pump house road etc.

Project Name

Powergrid Corporation of India Ltd. (POWERGRID)


Mariani, Surajmaninagar, Mokokchung, Imphal, P.K.Bari


24 months


Powergrid Corporation of India Ltd (POWERGRID)