Substation Secondary Design Engineer - Bay Control and Protection

Hitachi Energy Ltd.; Chennai District; On-site; INR 900,000 - 1,300,000; Full time

Job summary

Hitachi Energy Ltd. in Chennai is seeking an experienced Electrical Engineer to support Protection & Control engineering.

You will generate electrical schematics using AutoCAD, create SLDs, BOMs, and protective diagrams for substations, and liaise with Primary/Project Management teams. You will collaborate with cross-functional colleagues, review documents with diligence, and ensure compliance with safety and QA/QC standards while contributing to digital substation drawings and related IED

Qualifications

• Bachelor level degree in Electrical Engineering or Diploma in Electrical Engineering.
• 5–8 years of relevant experience in Protection & Control.
• Excellent knowledge of AutoCAD/AutoCAD Electrical tools.
• Strong exposure to Protection & Control Systems for T&D/Gen and IEC/IEEE/ANSI standards.
• Relay configuration and testing is a plus.
• Good written and spoken English; ability to collaborate across teams.

Responsibilities

• Prepare Single Line Diagrams and Protection Single Line Diagrams.
• Create Panel Layouts and BOM and protective schematics for substations.
• Develop junction boxes for CT/VT and density monitors; perform AC/DC load calculations.
• Draft trip matrices, IO signal lists, and interlocking tables for busbar configurations.
• Address customer queries during project execution and coordinate with cross‑functional teams.
• Self-review documents before submission to Lead Engineer and generate preliminary BOM.
• Prepare Mimic boards, communication architecture diagrams, and complete digital protection drawings.

Skills

Teamwork

Communication

Interpersonal skills

English proficiency

Education

Bachelor's in Electrical Engineering

Diploma in Electrical Engineering

Tools

AutoCAD

AutoCAD Electrical

Job description

The Opportunity

You will be a part of the GA Secondary team and support the execution of Protection and Control engineering. Your work involves mainly creating electrical circuit diagrams and supporting documents. We use the AutoCAD. Electrical tool for generating the schematics. You will be an individual contributor who would deliver the tasks as per the given inputs and when required need to work in coordination with other colleagues and should exhibit good collaborative skills to complete the task. In the absence of your Lead or in some cases, you will be required to interact with our counterparts to get/clarify queries. You may also interact with other departments like Primary, Project Management, and Production.

How You’ll Make An Impact

• Preparation of Single Line Diagram/Protection Single Line Diagram.
• Preparation of Panel Layout and BOM .
• Preparation of Protection and Control Panel schematics for Medium/High Voltage Substation.
• Preparation of Junction Box for CT, VT, and Density monitors, AC / DC Load calculation.
• Preparation of Trip Matrix and IO Signal list.
• Preparation of Interlocking table and schematics for various Busbar configurations.
• Addressing the technical queries raised by the customer during the execution of a project, if required.
• Interaction with various cross-function teams like Primary, Project Management, and Production, when required.
• Self-reviewing the documents before submitting them to Lead Engineer.
• Generating Preliminary BOM by understanding the importance and consequences of releasing it.
• Preparation of Mimic boards in line with SLD and Layout drawings.
• Understanding and preparation of Communication Architecture diagrams.
• Preparation of protection schematics (Trafo, Line, Busbar) when we’ve integrated protection in LCC .
• Selection of Bay Control Unit and other protection IEDs.
• Preparation of complete Digital Control & Protection drawings as part of Digital Substation (with
• NCITs, MU’s, SAM600 modules, etc...). Configuration Relays and Testing of Relays added advantage.
• Adhering to applicable codes, practices, QA/QC policies, performance standards, and specifications.
• Responsible to ensure compliance with applicable external and internal regulations, procedures, and guidelines.
• Living Hitachi Energy’s core values safety and integrity, which means taking responsibility for your own
• actions while caring for your colleagues and the business.

Your Background

• Bachelor’s degree in B.E / Diploma in Electrical Engineering.
• Must have 5 -8 years of experience.
• Excellent knowledge of AutoCAD/AutoCAD Electrical tools.
• Very Good knowledge of Protection & Control Systems for T & D / Gen.
• Familiarity with codes and applicable standards like IEC, IEEE, ANSI, etc...
• Relay configuration and testing added advantage.
• Ability to work in a team and maintain professionalism.
• Good communication and interpersonal skills.
• Proficiency in both spoken & written English language is required.

Publication date : 2026-10-08