Maximise Transformer Efficiency and Reliability with Expert Maintenance and Testing.
At Sigma Power Services (SPS), we lead the way in delivering expert transformer solutions designed to enhance performance, prevent failures, and extend the lifespan of critical assets. Our comprehensive range of services includes maintenance, testing, condition monitoring, oil analysis, and repair services tailored to meet the diverse needs of transformer operators.
Our extensive expertise, state-of-the-art technology, and meticulous attention to detail ensure that your transformers operate at peak efficiency. By identifying potential issues early and applying corrective measures, we help reduce downtime, optimise performance, and safeguard operational continuity.
Comprehensive Transformer Testing Solutions
Our testing portfolio covers the full spectrum of transformer diagnostics, ensuring accurate detection of potential faults and insulation degradation.
Key Testing Services
Capacitance & Dissipation Factor (C&DF) / Tan Delta / DLA Test – Detects insulation deterioration and moisture ingress
Winding Resistance Test – Identifies imbalances, ensuring windings are in good condition
Excitation Current Test – Verifies core condition and detects partial short circuits
- Dynamic Resistance Measurement Test – Provides critical insights into tap changer performance and winding integrity
- Transformer Turns Ratio (TTR) Test – Ensures proper winding ratios, preventing performance issues
Leakage Reactance Test – Assesses mechanical integrity and winding deformation
Sweep Frequency Response Analysis (SFRA) – Detects core movement, winding displacement, and structural issues
Tap Changer Analysis – Ensures reliable tap changer operation to maintain voltage regulation
- Vector Group Identification – Confirms transformer phase alignment and polarity
Condition Monitoring, Upgrades, and Repairs
Our advanced condition monitoring solutions and upgrade services help clients maintain transformer performance and extend asset life.
Partial Discharge Testing – Acoustic-based PD testing in online and offline modes to detect insulation degradation
Insulation Resistance (Megger) / Polarization Index (PI) – Evaluates overall insulation health and longevity
Thermography – Identifies thermal hotspots to prevent overheating and potential failures
RFI PD Services – Detects radio-frequency interference signals indicating insulation issues
Oil Leak Repairs – Mitigates oil leaks to protect transformer integrity
Cooling System Upgrades – Enhances cooling efficiency, preventing overheating and extending service life
Expert Oil Analysis for Transformer Health
Oil analysis plays a crucial role in monitoring transformer condition and detecting early signs of deterioration.
- Dissolved Gas Analysis (DGA) – Identifies critical faults through gas composition analysis
Furanic Compound Detection – Measures paper insulation degradation
Water-in-Oil Analysis – Detects moisture contamination, preventing insulation failure
Polychlorinated Biphenyls (PCB) Detection – Ensures compliance and safety through PCB screening
- Metals-in-Oil Analysis – Identifies wear and contamination through trace metal analysis
Oil Quality Screens – Provides comprehensive insights into overall oil condition and suitability
Enhance Transformer Performance with Sigma Power
Sigma Power Services delivers industry-leading transformer solutions with a focus on precision, reliability, and long-term performance. Our proactive approach to maintenance, testing, and monitoring ensures your transformers are protected against failure, reducing operational risk and maximising asset value.
Contact Sigma Power today to discover how our transformer services can optimise your electrical infrastructure.
Transformers FAQ’s
Regular maintenance and testing ensure transformers operate reliably, prevent unexpected failures, and extend their lifespan. It also helps identify potential issues early, reducing downtime and repair costs.
Sigma Power offers a comprehensive oil analysis portfolio, including Dissolved Gas Analysis, Furanic Compounds Detection, Water-in-oil Analysis, Polychlorinated Biphenyls (PCBs) testing, and assessments for metals and oil quality to monitor transformer health.
Sigma Power utilises specialised diagnostic methods such as Sweep Frequency Response Analysis (SFRA), Dynamic Resistance Measurement Tests, Tap Changer Analysis, and Partial Discharge Testing in acoustic-based online modes to provide detailed insights into transformer performance.
Our Values
Driven by the principle of ‘Delivering Value. Always!’ our core values serve as a foundation for company culture and guide decision making, and interactions with customers, employees and partners across the group.
People
Safety
Exceptional Skill
Exemplary Service
Care
Common Systems