Commissioning Engineer
Job Title
Commissioning Engineer
Location
Various sites across the UK
Role Purpose
You will lead the commissioning of high voltage (HV) systems and equipment to ensure they are installed, tested, and compliant before energisation. This includes substations within Solar, Battery Storage, ICP, and DNO environments, covering voltages from 11kV to 132kV.
Key Responsibilities
Site Preparation: Assess site readiness and suitability for commissioning.
Planning & Documentation: Develop commissioning plans, inspection and test procedures (ITPs), and maintain records.
Installation Supervision: Oversee installation work to confirm compliance with design and standards.
Testing: Carry out testing across:
Switchgear, transformers, cables, battery chargers, signal panels
AC/DC, HV/LV electrical systems and SCADA
Activities including:
Functional checks
Ductor, insulation resistance, AC Hipot, VLF testing
Primary and secondary injection tests
CT analysis and fault finding (core/sheath to earth)
Transformer tests (winding resistance, ratio, dissipation factor, vector group, SFRA)
Cable Work: Terminate, gland, and test multicore and signal cables.
System Configuration: Set up protection relays and adjust logic to achieve design performance.
Safety & Quality: Ensure all work meets safety regulations and quality standards.
Troubleshooting: Identify and resolve commissioning issues.
Customer & Stakeholder Liaison: Represent the company professionally and support client expectations.
Training: Mentor junior engineers in systems and safe practices.
Other Duties: Provide support as directed by management.
Person Specification
Education & Qualifications
Essential:
HNC or Degree in Electrical Engineering
ECS or EUSR card
Full UK driving licence held for at least 12 months
Competent Person status for Permits to Work
Desirable:
City & Guilds 17th or 18th Edition Wiring Regulations
Advanced Apprenticeship in Electrical Installation
AP15 or OP40 certification
Experience & Skills
Essential:
Commissioning and testing HV systems, including:
Switchgear functional checks and ductor testing
AC Hipot, VLF, and DC pressure tests
Injection testing on protection relays
CT ratio and knee point analysis
Transformer testing (insulation resistance, ratio, vector group, DGPT2/Buchholz checks, SFRA)
Fault finding on HV/LV cables
Ability to interpret electrical drawings and specifications
Proficient with equipment including:
Omicron CMC356, CT Analyser, CPC100, Franeo 600, Testrano
Sverker 650, HVA 68TD VLF, Megger MIT515, DLRO10HD, Digi Bridge, PFT-1003