Secondary Design Engineer - Lead (Substations)

Larsen & Toubro Limited (L&T); Chennai; On-site; INR 1,200,000 - 2,400,000; Full time

Job summary

Larsen & Toubro Limited (L&T) seeks a Lead Secondary Design Engineer for substations in Chennai. Lead secondary engineering activities, review drawings, prepare SLDs, and ensure timely delivery for HV projects.

Ideal candidates have 7+ years in 15kV–500kV AIS/GIS, a B.Tech/BE, and multinational project exposure. MTech and site commissioning experience are assets; strong teamwork is essential.

Qualifications

• Experience in high voltage substations secondary design.
• Ability to review BOQ and vendor offers for protection relays and DC systems.
• Proficiency in generating SLDs and interlocking schemes.

Responsibilities

• Timely completion of all deliverables.
• Review CRP and automation drawings from vendors.
• Coordinate with site teams for design clarifications.
• Interact with vendors on technical specifications and compliance.

Skills

Automation SCADA

Project Engineering

Protective Relays

Schematic Design

Telecommunication

CRP

Equipment Sizing

Education

B.Tech/BE

Job description

Secondary Design Engineer - Lead (Substa...

LNT/SDE-L/1750027

• PTD-Power Transmission & Distribution - IC
• Chennai Head Qrs.

Posted On 29 May 2026

End Date 25 Nov 2026

Required Experience 6 - 10 years

Skills

Knowledge & Posting Location

Automation SCADA Project Engineering Protective Relays Schematic Design Telecommunication CRP Equipment Sizing

B.Tech/BE

Job Description

As lead secondary design engineer-substations the person shall be capable of creating & reviewing & executing secondary engineering / electrical design activities for substation/ power distribution projects. She/he will -review BOQ -check vendor offers for protection relays/SAS/LVAC and DC systems-generate Single Line Diagram(SLD) / protection and control SLD / interlocking schemes / cable schedules / review schematics / propose SAS signal lists and detailed design drawings along with drafters -will prepare calculations e.g. Ct sizing / battery dg sizing / cable sizing / lv cable estimation etc. Will deliver outcomes on time as per project needs.

Job specification

Experience in high voltage substation secondary design min 7 years with voltage levels 15kV up to 500kV covering both AIS and GIS. Having BTech-BSc equivalent degree in electrical and electronics engineering. Worked in multinational projects. Able to manage a team of engineers and drafters. MTech degree and site commissioning experience is an asset. Working level knowledge on power system studies is desired.

Key responsibilities:

• Timely completion of all deliverables
• Responsible for review of CRP (control relay panels) and automation drawings developed by the vendor
• Interact with site execution & cluster teams for clarification w.r.t. The design of equipment
• Interact with vendor for clarification w.r.t. Compliances to technical specifications & comments and quality
• Coordinate with primary design engineer obtaining specification requirement of the client and checklist for evaluation from the project engineering managers
• Evaluate technical offers based on technical specification (requirement) of the client and timely submission to design lead (secondary) for review
• Prepare design calculations of CT / VT and battery sizing and development of dc & ac single line diagrams of a substation and submitting to the design lead for checking
• Review bill of material and comparing with the tender quantity
• Pre-tender engineering including estimation of BOM (bill of materials) and offer reviews for secondary equipment