India's top engineering and construction firm, Larsen & Toubro (L&T), said on Thursday it has bagged an order worth Rs3.11 billion ($78.3 million) for an electrical sub-station from Qatar.

The package consists of 66/11 kV Gas insulated switchgears, 11 kV metal clad air insulated switchgears, 50/60MVA 66/11 kV transformers, substation control system, protection systems and DC System and auxiliaries, said a source.

The contract also encompasses design and construction of substation buildings together with associated utilities such as air conditioning, fire fighting and lighting systems. All five substations are to be completed in a time frame of 27 months, he added.