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PREDICTIVE DIAGNOSTICS
EARLY FAULT DETECTION & FLUID ANALYSIS
Transformers represent one of the most critical and capital-intensive assets in your power distribution network. Internal insulation breakdown, moisture ingress, and winding degradation often occur invisibly over years of operation. MET Group delivers complete fluid diagnostics and live non-intrusive monitoring to evaluate internal transformer health long before thermal runaway or internal arcing causes irreversible structural failure.
KEY DELIVERABLES:
Dissolved Gas Analysis (DGA)
Laboratory fluid sampling to detect trace concentrations of acetylene, methane, and hydrogen produced by internal thermal and electrical faults.
Dielectric Breakdown & Moisture Testing
Testing transformer oil breakdown voltage and water content to verify liquid insulation integrity.
Acoustic Partial Discharge Monitoring
Airborne and contact ultrasonic scans to pinpoint internal discharge activity and loose core laminations while energised.
OPERATIONAL SCOPE
COMPREHENSIVE TRANSFORMER AUDIT SCOPE
Systematic electrical, fluid, and mechanical verification protocols applied across oil-immersed and dry-type cast resin transformers.
01
WINDING & INSALATION DIAGNOSTICS
Precision winding resistance, turns-ratio (TTR), and insulation resistance testing conducted under isolation to detect shorted turns, core displacement, and phase imbalances.
03
TAP CHANGER & BUSHING SERVICING
Intrusive contact dressing, mechanical timing verification, and gasket replacements across off-circuit and on-load tap changers (OLTC) to eliminate resistive heating.
02
FLUID SAMPLING & LABATORY ANALYSIS
Comprehensive oil health profiling covering breakdown voltage, acidity, interfacial tension, furan analysis, and DGA to accurately gauge paper insulation aging.
04
AUXILIARY & SAFETY SYSTEM AUDITS
Functional calibration of Buchholz relays, pressure relief valves, oil temperature indicators (OTI), and bund containment systems to ensure emergency trips fire correctly.
ASSET PRESERVATION
EXTENDING ASSET LIFESPAN AND MITIGATING RISK
An unmanaged transformer failure leads to widespread site blackouts, severe environmental oil spills, and lead times of up to 12 months for replacement units. By combining non-invasive fluid sampling with scheduled offline diagnostic testing, our high-voltage engineers identify minor winding anomalies and oil contamination early.
This proactive approach restores insulation quality, extends total operational lifespan, and satisfies strict insurance underwriters and EAWR compliance standards.
SECTOR APPLICATION
TAILORED SUPPORT FOR CRITICAL HV NETWORKS
Safeguarding high-voltage step-down and distribution transformers across complex operating environments.
Manufacturing & Heavy Industry
Scheduled maintenance routines aligned with factory shut periods to protect heavy-load step-down transformers from harmonic stress and thermal overload.
Data Centres & Mission-Critical
Non-intrusive oil sampling and thermographic surveys on active HV/LV transformers, ensuring zero risk to continuous dual-path compute power.
Commercial & Institutional Estates
Full condition reporting, oil filtration, and compliance management for landlord-owned package substations across high-density commercial portfolios.
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