# Larsen & Toubro — Transmission and substation EPC · Process and energy plant EPC · Industrial and factory delivery

> Larsen & Toubro is a Mumbai-based Indian engineering, procurement and construction group with roots in 1938. Its businesses deliver energy, transmission, hydrocarbon, industrial and complex infrastructure projects. Depending on the contract, L&T may provide FEED, a defined construction package or turnkey EPC. These references retain the disclosed scope and project milestone; the group’s business heritage is distinguished from later legal incorporation.

- **Legal name:** Larsen & Toubro Limited
- **Headquarters:** Mumbai, India
- **Founded:** 1938
- **Official website:** [Larsen & Toubro](https://www.larsentoubro.com)
- **URL:** https://voltformer.com/epc-contractors/larsen-toubro
- **Markdown:** https://voltformer.com/epc-contractors/larsen-toubro.md
- **JSON:** https://voltformer.com/epc-contractors/larsen-toubro.json

## CEO and leadership profile

### S. N. Subrahmanyan

Chairman and Managing Director

S. N. Subrahmanyan is L&T’s chairman and managing director. He joined in 1984 as a project-planning engineer. His official biography records civil-engineering education and postgraduate business studies. His career developed through the group’s construction and infrastructure activities; his current role provides corporate leadership across L&T’s EPC, manufacturing and service businesses.

- **Sources checked:** 2026-10-10
- **Profile:** [S. N. Subrahmanyan](https://voltformer.com/ceo/s-n-subrahmanyan)

[Larsen & Toubro](https://www.larsentoubro.com/corporate/about-lt-group/leadership/board-of-directors/s-n-subrahmanyan)

## How to select an EPC contractor

EPC means engineering, procurement and construction. Compare contractors by project technology, country, voltage level and contractual delivery scope.

## Directory methodology

This directory presents company profiles, not a scored ranking or certification. Company-wide experience may include engineering, EPCM, equipment supply and consortium roles. Confirm the exact role, current qualifications and project references with the official company before shortlisting.

## What should an EPC enquiry include?

Specify the project country, capacity, grid voltage, single-line diagram, site conditions, scope boundaries, target schedule and acceptance tests. Clarify who owns permitting, civil works, grid studies, commissioning and performance guarantees.

## Equipment enquiries submitted here go to Voltformer. Contact the listed company directly for its EPC services.

## Engineering specializations

- Transmission and substation EPC
- Process and energy plant EPC
- Industrial and factory delivery
- Specialized technical facility integration

## Declared capabilities

- **Basic and detailed engineering:** Listed capability; confirm project-specific scope
- **Procurement and supply:** Listed capability; confirm project-specific scope
- **Civil and structural construction:** Listed capability; confirm project-specific scope
- **Testing and commissioning:** Listed capability; confirm project-specific scope
- **High-voltage substation EPC:** Listed capability; confirm project-specific scope
- **Transmission lines:** Listed capability; confirm project-specific scope
- **Turnkey power plant EPC:** Listed capability; confirm project-specific scope
- **Grid interconnection:** Listed capability; confirm project-specific scope

## Representative projects

### HPCL Visakh residue-upgradation facility
- **Capacity / scope:** 3.55 MMTPA; turnkey EPC and feed-in
- **Country:** India | **Client:** Hindustan Petroleum Corporation Limited | **Year:** 2026
- **Description:** L&T reported feed-in at HPCL’s 3.55 MMTPA LC-Max residue-upgradation facility at Visakh refinery, delivered through a turnkey EPC scope. Process-plant delivery depends on interfaces between the technology licensor, owner and EPC contractor. Process equipment, utilities, electricity supply and safe commissioning must be planned together. This engineering interpretation highlights the integration demands behind the announced contractual scope.
- **Technologies:** Refinery processes, Civil and structural engineering
- **Original source:** [https://www.larsentoubro.com/pressreleases/2026/2026-01-05-lt-delivers-feed-in-at-world-s-first-lc-max-residue-upgradation-facility-at-visakh-refinery](https://www.larsentoubro.com/pressreleases/2026/2026-01-05-lt-delivers-feed-in-at-world-s-first-lc-max-residue-upgradation-facility-at-visakh-refinery)

### LIGO-India observatory
- **Capacity / scope:** 8 km vacuum tube; EPC contract
- **Country:** India | **Client:** Department of Atomic Energy | **Year:** Contract announced 2026; completion undisclosed
- **Description:** L&T won the Department of Atomic Energy’s LIGO-India observatory EPC contract, including 8 km of ultra-high-vacuum beam tube in Maharashtra. In specialized technical facilities, tolerances between buildings, equipment and measurement systems shape delivery. Vibration, airflow, controlled environments and facility utilities require coordination between engineering disciplines. This interpretation explains why the announced work involves demanding interfaces beyond ordinary building construction.
- **Technologies:** Ultra-high vacuum, Civil and structural engineering
- **Original source:** [https://www.larsentoubro.com/pressreleases/2026/2026-02-24-lt-wins-significant-order-for-ligo-india-observatory](https://www.larsentoubro.com/pressreleases/2026/2026-02-24-lt-wins-significant-order-for-ligo-india-observatory)

### West Bengal gas-insulated substations
- **Capacity / scope:** 220 kV substations and associated lines
- **Country:** India | **Year:** Contract announced 2026; completion undisclosed
- **Description:** L&T announced orders for 220 kV gas-insulated substations and associated lines in West Bengal, alongside further Middle Eastern transmission infrastructure. For transmission delivery, the important interface is how the line and substation operate together. Protection coordination, power transformers, site testing and utility acceptance require separate execution packages. This engineering interpretation explains why the disclosed grid scope matters.
- **Technologies:** High-voltage substation, Power transmission line
- **Original source:** [https://www.larsentoubro.com/pressreleases/2026/2026-02-25-lt-wins-orders-major-in-india-and-abroad-for-power-transmission-infrastructure](https://www.larsentoubro.com/pressreleases/2026/2026-02-25-lt-wins-orders-major-in-india-and-abroad-for-power-transmission-infrastructure)

## Technical services

- **Transmission and substation EPC:** For transmission delivery, the important interface is how the line and substation operate together. Protection coordination, power transformers, site testing and utility acceptance require separate execution packages. This engineering interpretation explains why the disclosed grid scope matters.
- **Process and energy plant EPC:** Process-plant delivery depends on interfaces between the technology licensor, owner and EPC contractor. Process equipment, utilities, electricity supply and safe commissioning must be planned together. This engineering interpretation highlights the integration demands behind the announced contractual scope.
- **Industrial and factory delivery:** A multisector order total combines assignments for different customers and contracts. Industrial equipment, facility construction and energy connections have different delivery interfaces. This interpretation helps readers understand the portfolio without treating the package as a single power station or customer project.
- **Specialized technical facility integration:** In specialized technical facilities, tolerances between buildings, equipment and measurement systems shape delivery. Vibration, airflow, controlled environments and facility utilities require coordination between engineering disciplines. This interpretation explains why the announced work involves demanding interfaces beyond ordinary building construction.

## Standards and certifications



## Official contacts

- **Address:** L&T House, N. M. Marg, Ballard Estate, Mumbai, India
- **Official website:** https://www.larsentoubro.com/contact-us

## Reference statistics

- **Foundation / company heritage:** 1938
- **Sourced example project scope:** 3.55 MMTPA
- **Sourced example transmission voltage:** 380 kV

## Company and energy news

- [L&T signs FEED and EPC framework with Petroleum Development Oman](https://voltformer.com/news/lt-pdo-six-year-epc-framework-2026) — 2026-07-31 · [Markdown](https://voltformer.com/news/lt-pdo-six-year-epc-framework-2026.md)
- [L&T wins Indian metals and mineral-processing orders](https://voltformer.com/news/lt-metals-minerals-india-orders-2026) — 2026-07-20 · [Markdown](https://voltformer.com/news/lt-metals-minerals-india-orders-2026.md)
- [L&T receives turnkey substation orders in the Middle East](https://voltformer.com/news/lt-middle-east-substations-may-2026) — 2026-05-13 · [Markdown](https://voltformer.com/news/lt-middle-east-substations-may-2026.md)
- [L&T wins BCGCL ammonia-synthesis turnkey order in Odisha](https://voltformer.com/news/lt-bcgcl-ammonia-synthesis-epc-2026) — 2026-05-08 · [Markdown](https://voltformer.com/news/lt-bcgcl-ammonia-synthesis-epc-2026.md)
- [L&T secures grid orders in West Bengal and the Middle East](https://voltformer.com/news/lt-west-bengal-middle-east-grid-awards-2026) — 2026-02-25 · [Markdown](https://voltformer.com/news/lt-west-bengal-middle-east-grid-awards-2026.md)
- [L&T wins EPC contract for the LIGO-India observatory](https://voltformer.com/news/lt-ligo-india-observatory-epc-2026) — 2026-02-24 · [Markdown](https://voltformer.com/news/lt-ligo-india-observatory-epc-2026.md)
- [L&T reports feed-in at HPCL’s Visakh LC-Max facility](https://voltformer.com/news/lt-hpcl-visakh-residue-upgradation-feed-in-2026) — 2026-01-05 · [Markdown](https://voltformer.com/news/lt-hpcl-visakh-residue-upgradation-feed-in-2026.md)

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