Role Brief Secondary Protection Engineer (Operator-Side, Hyperscale Data Centre Construction) Purpose of the Role The Secondary Protection Engineer provides technical oversight and assurance of low- and medium-voltage electrical protection systems during the design, construction, and commissioning of a hyperscale data centre. The role ensures that all secondary protection schemes are compliant, coordinated, and reliable to protect uptime and critical infrastructure. Key Responsibilities Design & Review Review single-line diagrams (SLDs), relay schedules, CT/VT ratios, and trip logic. Validate protection coordination studies to ensure correct fault discrimination. Confirm designs meet operator standards, local codes, and uptime requirements. Protection Settings & Coordination Approve relay types and settings. Verify selective coordination between upstream and downstream devices. Ensure settings files are documented and stored for long-term maintainability. Testing & Commissioning Oversight Witness secondary injection testing for relays and trip circuits. Participate in Factory Acceptance Tests (FAT) and Site Acceptance Tests (SAT). Sign off on protection system performance prior to energisation. Interface & Handover Act as liaison between EPC contractors, OEMs, and operator engineering teams. Integrate protection devices into SCADA/BMS for operational monitoring. Deliver as-built documentation, test reports, and operator training. Skills & Experience Degree-qualified in Electrical Engineering (or equivalent). 5 years in LV/MV protection systems for data centres, utilities, or industrial power. Strong knowledge of protection relays (SEL, Schneider, Siemens, ABB) and IEC/IEEE standards. Experience with IEC 61850 protocols and integration into SCADA/BMS. Proven ability to interpret complex SLDs and troubleshoot protection issues.
