Protection Relay Testing Lead | Commissioning & Grid Sync

Larsen & Toubro; Riyadh; On-site; SAR 180,000 - 300,000; Full time

Job summary

Larsen & Toubro in Riyadh seeks a senior protection relay testing engineer to lead and manage testing for utility-scale solar PV plants, substations, and grid interconnections.

You will supervise relay testing across overcurrent, earth fault, differential, distance and busbar protections; coordinate with EPCs and clients; review drawings; ensure SCADA integration and safety compliance; and prepare commissioning documentation.

Responsibilities

• Lead and manage protection relay testing and commissioning activities for utility-scale solar PV plants, substations, switchyards, and grid interconnection facilities.
• Supervise testing of protection relays, including overcurrent, earth fault, differential, distance, transformer, busbar, and line protection schemes.
• Review protection coordination studies, relay setting calculations, protection schematics, single-line diagrams, and control wiring drawings.
• Perform and oversee secondary injection, primary injection, functional testing, trip circuit checks, and end-to-end protection testing.
• Ensure proper integration and testing of protection relays with SCADA, RTU, and substation automation systems.
• Coordinate with EPC contractors, consultants, OEMs, utilities, and client representatives during testing and commissioning.
• Manage testing schedules, manpower allocation, equipment availability, and site execution activities.
• Ensure compliance with IEC, IEEE, utility requirements, project specifications, and approved testing procedures.
• Troubleshoot protection relay malfunctions, wiring issues, communication failures, and protection scheme abnormalities.
• Prepare and review relay test reports, commissioning records, punch lists, and handover documentation.
• Ensure calibration and proper use of relay testing equipment, such as OMICRON and Megger test kits.
• Implement site safety procedures, permit-to-work requirements, and quality control measures during testing activities.
• Provide technical guidance and training to relay testing engineers and technicians.
• Support grid synchronization, energization, performance testing, and final project handover.

Job description

Larsen & Toubro in Riyadh seeks a senior protection relay testing engineer to lead and manage testing for utility-scale solar PV plants, substations, and grid interconnections.

You will supervise relay testing across overcurrent, earth fault, differential, distance and busbar protections; coordinate with EPCs and clients; review drawings; ensure SCADA integration and safety compliance; and prepare commissioning documentation.