ElectroCore Arabia carried out comprehensive corrective maintenance on a 100MVA power transformer at SEC National Grid Riyadh Al Kharj substation. The scope included leakage arresting, gasket replacement across all flanges and access points, transformer oil filtration and vacuuming, and PRD & Buchholz relay gasket replacement to restore transformer integrity and prevent future oil leaks.
Scope of Work
- Leakage arresting from transformer tank, flanges, and bushings
- Complete gasket replacement on all manholes and handhole covers
- Bushing gasket inspection and replacement
- Transformer oil filtration and vacuuming to remove moisture and particulates
- Oil dielectric strength (BDV) testing before and after filtration
- PRD (Pressure Relief Device) gasket replacement
- Buchholz relay gasket replacement and float testing
- Conservator and silica gel breather inspection
- Radiator valve and connection gasket replacement
- Final pressure test and leak verification
- Post-repair testing (TTR, IR, SFRA, PD, BDV)
- Post-maintenance electrical testing (IR, TTR, SFRA)
- Re-commissioning and energization support
