Secondary Design Engineer

Role & responsibilities

Key Responsibilities:

• Review tender documents and technical specifications; prepare Design Intent Documents and design inputs for tendering.
• Develop protection single-line diagrams (SLDs) showing protection principles, relays and metering.
• Prepare Functional Design Descriptions/Standards, signal lists, trip matrixes, logic and interlocks.
• Produce schematic diagrams for control & relay panel interfaces, circuit diagrams for new and retrofit setups, cable block diagrams, wiring/termination diagrams and core sheets.
• Prepare relay ordering information, cable schedules, BOQ estimates and SCS IO schedules.
• Perform panel engineering tasks (layouts, circuit diagrams, wiring tables, terminal tables) and create asbuilt documentation.
• Size CTs/VTs, perform voltage drop calculations for trip/close coils and LVAC power cables, and design auxiliary power systems (LV AC panels, DC panels, auxiliary transformer, battery & charger sizing, cable sizing and selectivity studies).
• Review and technically vet vendor drawings/offers for control & relay panels and auxiliary systems; conduct vendor offer evaluations.
• Support FAT/SAT of primary and secondary equipment and participate in customer approvals for designs and drawings.
• Coordinate with primary engineering, lead engineers, sourcing, factory counterparts and protection/control teams to ensure timely design progress and delivery.
• Identify technical risks and opportunities; estimate engineering effort for tender costing and propose methods to reduce engineering effort.
• Attend customer meetings and site visits for tender/project clarifications; act as interface engineer during erection & commissioning when required.
• Maintain and improve quality systems and ensure ontime delivery of design deliverables.

Requirements:

• Bachelors degree in Electrical Engineering or equivalent.
• Minimum 6 years’ experience in secondary design for high-voltage / EHV substations (experience up to 20 years considered).
• Strong knowledge of protection and control principles, protection relays, metering and protection schemes.
• Proven experience preparing protection SLDs, functional design descriptions, signal lists, trip matrices, logic/interlocks, and detailed wiring/circuit diagrams.
• Proficiency in panel engineering (layouts, terminal/wiring tables) and creating cable schedules, BOQs and relay ordering documents.
• Handson experience with interfaces to primary equipment, bay controllers, SCADA/RTU and teleprotection systems.
• Experience in auxiliary power system design (LV/ DC panels, battery & charger sizing) and CT/VT selection and sizing.
• Ability to review and technically vet vendor drawings and offers; experience with FAT/SAT activities.
• Good knowledge of AIS and GIS secondary design requirements.
• Strong communication and coordination skills; ability to work with crossfunctional teams and interact with customers and vendors.
• Willingness to travel for site visits, FAT/SAT and customer meetings.
• Proficient with engineering documentation tools (e.g., AutoCAD or equivalent) and standard office applications.

Preferred Qualifications:

• Practical experience in relay configuration and commissioning.
• Familiarity with IEC 61850, protection relay vendor tools and bay controller configuration.
• Prior experience on retrofit projects and modifying existing drawings using red/green markups.
• Advanced degree or professional certifications in power systems, protection or control disciplines.

Location: Chennai, India

Preferred candidate profile