Transformer Services

We provide specialized transformer services covering inspection, diagnostics, maintenance, repair, and commissioning, aligned with SEC, IEC, IEEE, and SAES standards.

Preventive & Predictive Maintenance

Scheduled maintenance programs as per SEC requirements
Routine inspection of bushings, gaskets, and connections
Oil level monitoring and sampling
Cooling system performance checks
Tap changer mechanism inspection
Bushing and insulation condition assessment
Grounding system verification
Cleaning and tightening of all connections
Condition-based monitoring and performance trend analysis
Infrared thermography for hot spot detection
On-site inspection with advanced diagnostic tools
Dissolved Gas Analysis (DGA) trending
Partial discharge monitoring
Oil quality trend analysis
Asset health scoring and lifecycle prediction

Electrical Testing & Diagnostics

Transformer Turns Ratio (TTR)
Insulation Resistance (IR) and Polarization Index (PI)
Winding Resistance Testing
Tan Delta (Power Factor) Testing
Sweep Frequency Response Analysis (SFRA)
Dielectric Frequency Response Analysis (DFRA)
Partial Discharge (PD) testing
Magnetic Balance Test
Excitation Current Test
Short Circuit Test
Functional and operational testing

Oil Diagnostics & Treatment

Dissolved Gas Analysis (DGA) – Detect fault gases
Moisture Content – PPM measurement
Acidity Test – Neutralization number
BDV Test – Breakdown voltage
Interfacial Tension – Oil degradation
Oil Filtration – Particle removal
Dehydration – Moisture removal
Degassing – Dissolved gas extraction
Oil Reclamation – Fuller’s earth treatment
Oil Regeneration – Full restoration

Tap Changer (OLTC/DETC) Services

Inspection Visual inspection of contacts, diverter switch, and drive mechanism
Maintenance Cleaning, lubrication, and adjustment of all moving parts
Overhaul Complete disassembly, inspection, and reassembly
Contact Replacement Replacement of worn or damaged contacts
Timing Testing Operational sequence and transition time verification

Cooling System Maintenance

Radiator Cleaning Internal and external flushing of radiator banks
Fan & Pump Checks Motor testing, bearing inspection, and performance verification
Thermal Performance Optimization for high ambient temperature conditions
Oil Leak Repair Gasket replacement and sealing of cooling system joints
Flow Testing Oil flow rate measurement and valve operation checks

Installation & Commissioning

Transformer erection, assembly, and alignment
Oil filling under vacuum and drying processes
Pre-commissioning and Site Acceptance Testing (SAT)
Energization and commissioning supervision

Leakage Detection & Assessment

Transformer oil leakage is a critical issue that can lead to insulation failure, overheating, and environmental hazards if not addressed promptly.
ElectroCore Arabia applies systematic inspection and diagnostic techniques to identify leakage sources.

Inspection
Methods

Visual inspection of tank joints, flanges, radiators, bushings, and valves
Identification of corrosion, gasket failure, and welding defects
Oil level monitoring and verification of leakage points

Advanced Leak
Detection Techniques

Vacuum and pressure testing for integrity verification
Dye penetrant or tracer methods for identifying micro leaks
Thermal imaging to detect abnormal temperature patterns linked to oil loss
Oil loss monitoring and trend analysis

Transformer Services