Oil Maintenance operative
Fortel/1242 | AB42 0SR
Job Description – Oil Mechanic (Up to 400kV)
Position: Oil Mechanic (Up to 400kV)
Location: Various Transmission & Substation Sites Across the UK
Employment Type: Full-time / Contract
Salary: Competitive (Based on experience and certifications)
Job Summary:
We are seeking a skilled and experienced Oil Mechanic specializing in the maintenance, servicing, and repair of high-voltage (HV) and extra-high-voltage (EHV) transformers, circuit breakers, and oil-insulated equipment up to 400kV. The ideal candidate will have a strong background in handling oil filtration, oil replacement, testing, and fault diagnosis to ensure the reliability and efficiency of electrical transmission systems.
Key Responsibilities:
Transformer & Switchgear Oil Maintenance:
- Conduct oil filtration, degassing, and dehydration of transformers and switchgear up to 400kV.
- Perform oil sampling and analysis to assess dielectric strength, moisture content, and contamination levels.
- Drain, refill, and circulate insulating oils to maintain optimal equipment performance.
- Replace and maintain bushings, gaskets, seals, and radiators on oil-filled transformers.
Testing & Fault Diagnosis:
- Conduct DGA (Dissolved Gas Analysis) and interpret oil test results to detect potential transformer faults.
- Perform pressure testing, insulation resistance testing, and breakdown voltage tests on oil-filled equipment.
- Identify leaks, overheating issues, and insulation breakdowns, implementing corrective measures.
- Maintain detailed inspection reports and test records for compliance and future reference.
Equipment Installation & Overhaul:
- Assist in the installation, commissioning, and retrofitting of oil-filled power transformers and reactors.
- Carry out preventative maintenance and emergency repairs on oil-insulated circuit breakers, tap changers, and bushing assemblies.
- Ensure flushing and refilling of transformer oil during major maintenance or refurbishment activities.
- Support the vacuum filling process to remove moisture and ensure proper insulation levels.
Safety & Compliance:
- Adhere to National Grid, DNO, and manufacturer standards for oil handling and maintenance.
- Ensure compliance with HSE regulations, COSHH, and environmental standards for oil disposal and handling.
- Conduct risk assessments and method statements (RAMS) before performing maintenance activities.
- Follow lockout-tagout (LOTO) procedures and high-voltage safety protocols to prevent electrical hazards.
Collaboration & Documentation:
- Work closely with substation engineers, electrical technicians, and HV specialists to ensure efficient maintenance operations.
- Maintain accurate logs, inspection reports, and oil quality documentation for regulatory compliance.
- Train and mentor junior oil mechanics and apprentices in best practices.
Qualifications & Skills Required:
Essential:
✅ CSCS or EUSR (Energy & Utility Skills Register) Card
✅ Oil Handling & Filtration Certification
✅ Experience working with transformers, switchgear, and oil-filled equipment up to 400kV
✅ Knowledge of insulating oil properties, contamination risks, and filtration techniques
✅ Strong understanding of electrical safety procedures and high-voltage maintenance practices
✅ Proficiency in using oil testing equipment (DGA, dielectric strength tester, moisture analyzers, etc.)
Desirable:
➕ National Grid Competent Person (NG Persons) Certification
➕ Confined Space Training
➕ Manual Handling & Fire Safety Certification
➕ First Aid at Work Certification
➕ Experience with SF6 Gas Handling & Testing
How to Apply:
Interested candidates should submit their CV and relevant certifications to Soumya@fortel.co.uk or contact 01902 603409 for further details.
