Role Brief Secondary Protection Engineer
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.
Witnesssecondary injection testingfor 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.
Solid knowledge of protection relays (SEL, Schneider, Siemens, ABB) and IEC/IEEE standards.
Experience with IEC ***** protocols and integration into SCADA/BMS.
Proven ability to interpret complex SLDs and troubleshoot protection issues.
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