THANU RAJA.R
Tirunelveli
Summary
Secondary Engineering Lead designing, reviewing, and implementing electrical control and protection systems for substations and power plants. Supports integration with SAS, RTU, and control and relay panels across projects rated from 415V to 765kV, with work spanning testing, commissioning, and scheme preparation. Builds drawings and interfaces that align secondary systems with primary equipment and utility specifications.
Overview
4
4
Certifications
9
9
years of professional experience
Work History
Secondary Engineering Lead
Hitachi Energy India Limited
07.2025 - Current
- Conduct a detailed study of customer specifications and requirements regarding sales offers, while selecting and optimizing materials to increase project margins.
- Possess experience in design for voltage levels ranging from 132kV to 765kV, both integrated and standalone.
- Developing SLDs, Protection SLDs, and Interlock Logic diagrams for Control and Relay Panel designs, ensuring proper implementation of protection and interlocking schemes.
- Design control and relay panels for voltages between 33kV and 765kV for various bus arrangements in both Air Insulated Switchgear (AIS) and Gas Insulated Switchgear (GIS) for customers such as PGCIL, NTPC, Adani, Reliance, GETCO, TANGETCO, APTRANSCO, and MSETCL for Green and Brown substations.
- Develop designs for digital substations, including both process bus and station bus configurations for 220kV and 400kV systems.
- Prepare and monitor the design and application status for each project.
- Review detailed design documents prior to submission to customers and expedite the approval process.
- Ensure that customer relations are managed effectively and optimally.
Electrical Secondary Engineering Lead
Kalpataru Projects International Limited
12.2023 - 07.2025
- Managed multiple Eastern and Northern region projects for WBSETCL, UPPTCL, and BSPTCL, coordinating delivery against client requirements.
- Validated control and relay panels, SAS network architectures, RTUs, and power and control cable schedules against technical specifications.
- Coordinated client approvals and technical discussions to align project execution with customer specifications and requirements.
- Liaised with vendors to expedite drawing submissions and approvals, keeping project timelines on track.
Senior Testing and Commissioning Engineer
ReNEW Private Limited
10.2022 - 12.2023
- Tested and commissioned 125 MVA power transformers and 400 KV AIS equipment, including CTs, CVTs, breakers, isolators, and lightning arresters.
- Commissioned 33KV Siemens switchgear panels and 33kV Sterling & Wilson switchgear panels for the ReNew 250 MW solar plant.
- Handled and troubleshot Siemens Digsi4 and MicomP40 Agile numerical relays to support reliable protection performance.
- Performed schematic checks on CRP panels, protection tripping circuits, interlocks, and signal point-to-point verification to SCADA.
- Supported commissioning of inverter duty transformers and wave bar stability testing within the 33/400 KV AIS project scope.
Testing and Commissioning Engineer
Apex Infralink Limited
01.2021 - 07.2022
- Erected and grouted masts and SPS structures for traction substation installation.
- Installed and commissioned the 30MVA traction transformer, including hot oil circulation work.
- Erected towers and beams, then strung ACSR Zebra conductor and earth screen wire on the 110KV side.
- Built earth grids, installed electrodes, and completed individual structure and equipment earthing across the site.
- Ran cable laying from switchyard to control panels and completed end-to-end cable terminations.
- Tested and commissioned 110 KV and 25 kV CT, PT, breakers, isolators, and lightning arresters at the traction substation.
- Performed REF stability tests, commissioned OLTC-RTCC panels, checked CRP schematics, and verified interlocks, protection tripping, and inter-trip logic.
Testing and Commissioning Engineer
Voltech Engineers Private Limited
02.2018 - 01.2021
- Commissioned up to 765 kV CT, CVT, breakers, isolators, lightning arresters, wave MVAR reactor stability, and bus bar stability testing for AIS and GIS Substations.
- Troubleshot Micom P40 Agile, Multilin D60, 7SD53, 7SJ85, P111, P211, RET615, and REF615 relays during commissioning and protection checks.
- Performed CRP schematic checks, protection tripping, interlocks, intertrip checks, and point-to-point signal testing to SCADA across multiple bays.
- Commissioned 500MVA, 100 MVA, 105 MVA, 50 MVA, 12.5 MVA, 2 MVA, 1.6 MVA, and 220/55 kV traction transformers, including differential, REF, and OLTC-RTCC tests.
- Executed 220/110 kV, 220/33 kV, 132/33 kV, 220/66 kV traction, and 220/55 kV substations during testing and commissioning assignments.
- Completed 6.6 kV board panels, 6.6 kV motors, 415V MSB panels, and LT protection checks during electrical system testing.
- Updated as-built diagrams and cable schedules, and carried out switchyard cable laying and end-to-end termination.
Education
Bachelor of Engineering - Electrical and Electronics
Cape Institute of technology
Tirunelveli, Tamilnadu, India01-2017
HSC - undefined
Government higher secondary school
Tirunelveli01-2013
SSLC - undefined
Government higher secondary school
Chettikulam01-2011
Skills
Zuken E3
AutoCAD
SAP
Certification
Appreciation Certificate for Outstanding Performance, dedicated service, sincere contribution and active support for the successful completion of 220 KV AIS, Chalakudy, provided by Kerala State Electricity Board Limited(KSEBL).
Timeline
Secondary Engineering Lead
Hitachi Energy India Limited
07.2025 - Current
Electrical Secondary Engineering Lead
Kalpataru Projects International Limited
12.2023 - 07.2025
Senior Testing and Commissioning Engineer
ReNEW Private Limited
10.2022 - 12.2023
Testing and Commissioning Engineer
Apex Infralink Limited
01.2021 - 07.2022
Testing and Commissioning Engineer
Voltech Engineers Private Limited
02.2018 - 01.2021
SSLC - undefined
Government higher secondary school
HSC - undefined
Government higher secondary school
Bachelor of Engineering - Electrical and Electronics
Cape Institute of technology