POWERING
RELIABLE CONNECTIVITY

L&T-S&L
Sectors
Transmission & Distribution

Transmission and Distribution (T&D) are foundational to the energy ecosystem, enabling the seamless flow of electricity from generation sources to end-users.

A resilient and intelligently engineered T&D network ensures system stability, operational reliability, and energy efficiency across regions. Leveraging its deep expertise in power project engineering, L&T-S&L has strategically expanded its capabilities to offer Transmission & Distribution services to utilities, Independent Power Producers (IPPs), and private power companies worldwide.

Our T&D Engineering Expertise Includes:

Substation Engineering
Transmission Line Engineering
Electrical Analytical Studies

Highlights

Substations: Engineered across voltage levels from 33 kV to 765 kV, with cumulative capacity exceeding 55,000 MVA
Transmission Lines: Designed and delivered projects from 66 kV to 765 kV, covering over 6,000 circuit kilometers (ckm)
Advanced Engineering Tools: Deployed software platforms for precision design, analysis, and optimisation

Projects

Project	Details
380/132/13.8kV GIS As-Safa BSP, Kingdom of Saudi Arabia	Client: Al-Jazirah Engineers & Consultants, Saudi Arabia Project Type: Substation Project Scope: Detail Engineering Services Detail design & engineering for Civil, Electrical, Automation/Control SCADA/Telecommunication Mechanical Works including As-Built Power System Studies
380/132/13.8kV GIS Sultanah BSP, Kingdom of Saudi Arabia	Client: Al-Jazirah Engineers & Consultants, Saudi Arabia Project Type: Substation Project Scope: Detail Engineering Services Detail design & engineering for Civil, Electrical, Automation/Control, SCADA/Telecommunication Mechanical Works including As-Built Power System Studies
380kV Shoibah SWCC-2 Substation Project, Kingdom of Saudi Arabia	Client: Saudi Designers Engineering Consultants, Saudi Arabia Project Type: Substation Project Scope: Detail Engineering Services Design and engineering services including Civil & Site works Electrical, Protection, Control, SAS, SCADA & Communication works Mechanical works including HVAC, plumbing system design Power System Studies
380/132/13.8 kV Airport Housing Substation Project, Kingdom of Saudi Arabia	Client: Al-Jazirah Engineers & Consultants, Saudi Arabia Project Type: Power System Studies Scope: Insulation Co-ordination Studies Over-voltage Ferro resonance analysis Ferro resonance prediction & conclusion Over-voltage of tertiary winding of power transformer Conduct Neutral grounding reactor (NGR) sizing study for line shunt reactors
380kV/132kV Substation with underground cables for New Duba Green Power plant, Kingdom of Saudi Arabia	Client: Al-Jazirah Engineers & Consultants, Saudi Arabia Project Type: Substation Project Scope: Detail Engineering Services Detail design and engineering services for Civil, Electrical, Automation/Control SCADA/Telecommunication, associated Works including As-Built Power System Studies
230/ 132/33 kV GIS Mekele & 230kV Dallol Substation, Ethiopia	Client: Larsen & Toubro Limited, Construction Project Type: Substation Project Scope: Detail Engineering Services Detail design for Electrical, Civil & Structural, Mechanical (HVAC & Fire Protection), C&I (CCTV, Fire detection & Alarm)
400kV & 230kV GIS Substations for NPCIL Kundankulam Nuclear Power Plant (KKNPP) units 3 & 4, India	Client: Nuclear Power Corporation of India Limited (NPCIL) Project Type: Substation Project Scope: Owner’s Engineering Services Review of design & engineering of switchyard electrical system Review of Balance of Plant (BOP) of common services
400kV GIS and 66kV AIS Substation and Transmission Line for 2x660 MW NTPC Khargone Thermal Power Project, India	Client: Larsen & Toubro Limited Project Type: Substation Project Scope: Detail Engineering Services Detail design and engineering, Cable Engineering, interface with various vendors Purchase specification and Bid Evaluation, Insulation Co-ordination Studies, BOQ, BOM etc.
Project Management Agency Services for Goa Tamnar Transmission Project Limited (GTTPL) Transmission Project, India	Client: PFC Limited Project Type: Transmission Project Scope: Project Management Services Due Diligence, Financial Review, monitoring of entire project during construction stage, drawdown certification, Operational review during post commissioning stage
400kV AIS Switchyard for 2x600 MW Malwa Ph-II Thermal Power plant, India	Client: Larsen & Toubro Limited Project Type: Substation Project Scope: Detail Engineering Services Detail design & engineering including sizing calculations, layouts, specifications Bid evaluation, BOM, Civil design As-built
220kV Transmission Line (Dariba), Rajasthan, India	Client: Serentica Renewables India 4 Private Limited Project Type: Transmission Line Project Scope: Owner’s Engineering Services Preparation of RFP & BER for substation Review Engineering for substation and transmission line
600 Ckm 765kV Lakadia-Vadodara Transmission Project Limited (LVTPL) Project, India	Client: Sterlite Power Transmission Limited Project Type: Substation and Transmission Line Project Scope: Owner’s Engineering Services Design review and approval of all documents, drawings, designs, specifications Review of the transmission lines route and substation layout
400kV D/C line , 22/132kV SS for Nangalbibra-Bongaigaon Transmission Line (NBTL) Project, India	Client: Sterlite Power Transmission Limited Project Type: Substation and Transmission Line Project Scope: Owner’s Engineering Services Design review and approval of all documents, drawings, designs, specifications Review of the transmission lines route and substation layout

POWERING RELIABLE CONNECTIVITY

Highlights

Projects

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POWERING
RELIABLE CONNECTIVITY