Transformer Oil Analysis

Transformer oil serves as both a coolant and a dielectric insulating medium. Its condition directly affects transformer reliability and safety. Routine oil analysis, particularly dissolved gas analysis, is the most effective non-invasive method for detecting developing transformer faults. ORDNEX coordinates transformer oil testing through qualified UAE-based laboratory partners.

PURPOSE & ENGINEERING VALUE

Why Transformer Oil Analysis Matters

Transformer failures are costly, potentially hazardous, and often occur without visible warning. Dissolved Gas Analysis (DGA) can detect thermal faults, partial discharge, and arcing events at an early stage, allowing planned intervention before catastrophic failure.

IEC 60599 provides the standard interpretation framework for DGA results, identifying the most probable fault type based on the ratios of dissolved gases detected.

DGA Fault Gas Indicators

·Hydrogen (H2): Partial discharge activity
·Methane (CH4): Low-temperature overheating
·Ethylene (C2H4): High-temperature thermal fault
·Acetylene (C2H2): Arcing — critical fault indicator
·Carbon oxides (CO/CO2): Cellulose insulation degradation

Typical Report Turnaround

3 to 5 business days for full transformer oil panel including DGA.

ORDNEX coordinates testing through qualified laboratory partners. Turnaround times are subject to laboratory capacity and sample condition.

TEST PARAMETERS

Analysis Parameters & Interpretation

Dielectric Breakdown Voltage (BDV)The primary indicator of insulation oil quality. BDV below 30 kV indicates moisture or particulate contamination that reduces electrical insulation strength.

Dissolved Gas Analysis (DGA)Identifies gases dissolved in the oil (hydrogen, methane, ethylene, acetylene) that indicate specific fault types — overheating, partial discharge, or arcing inside the transformer.

Water Content (Karl Fischer)Even trace moisture at 20–30 ppm significantly reduces BDV. High water content also accelerates cellulose insulation degradation inside the transformer.

Acid Number (TAN)Acidic oil attacks the transformer's cellulose insulation. Rising acid number indicates oil oxidation and signals the need for oil reconditioning or replacement.

Interfacial Tension (IFT)A sensitive indicator of oil oxidation and contamination by polar oxidation products. Declining IFT correlates with reduced dielectric performance.

Colour & AppearanceDarkening oil indicates oxidation and carbon contamination from arcing faults. Turbidity indicates water or particulate contamination.

Inhibitor Content (DBPC/DBP)Inhibited transformer oils contain antioxidants that extend service life. Depleted inhibitor content predicts accelerating oxidation.

Furans AnalysisFurfural compounds in the oil indicate degradation of the internal cellulose paper insulation, providing a non-invasive estimate of transformer insulation condition.

TYPICAL APPLICATIONS

Equipment Categories

·Marine power distribution transformers

·Shore power connection transformers

·Offshore platform step-down transformers

·Industrial HV/MV transformers

·Power station transformers

·Rectifier and converter transformers

·Voltage regulator oil

·HV switchgear oil

INDUSTRIES SERVED

Operational Sectors

·Power Generation & Distribution

·Offshore Platforms

·Industrial Manufacturing

·Naval & Coast Guard

·Ports & Terminals

·Shipyards

·Government Technical Organisations

·Oil & Gas Facilities

LABORATORY INTAKE

Submit a Transformer Oil Analysis Request

Provide transformer rating (kVA/MVA), oil type, last service date, and any observed operational anomalies. ORDNEX will coordinate sampling and laboratory routing.