Transformer Oil performance explained: what good oil must deliver
Transformer Oil also known as insulating oil is a key component in electrical transformers. It is important for good oil to meet all of the performance criteria, in order to maintain safe and stable performance. This article is an explanation of Transformer Oil performance in criteria and highlights the benefit of using BIO TRANSFORMER OIL for sustainability purposes.
Key Properties of Transformer Oil
- Dielectric Breakdown Voltage : In order to sustain without electrical failure, Transformer Oil must have high breakdown voltage (BDV).
- Resistivity : High resistivity means better insulation values and low leakage current.
- Flash Point : The higher flash point the less chance of ignition in the transformer
- Viscosity : Moderate viscosity ensures efficient heat dissipation without compromising flashpoint.
- Low-Temperature Performance : In cold climates or during shutdowns, oil has to remain fluid enough to circulate.
- Oxidation Stability & Aging Resistance : Optimal amount of oxidation resistance to maintain long-period of performance.
- Moisture Tolerance : Moisture in langis ng transformer has to be low as it affects oil's dielectric properties.
- Interfacial Tension : Measures surface tension between oil & water. It helps detect degradation or contamination. Lower interfacial tension can indicate degraded oil.
PSP Specialties High Performance Transformer Oil
High Performance Oil is the key to achieving insulation stability, heat dissipation, safety operation by providing all of the performance standard. PSP Specialties TRANSFORM and PSP Specialties TRANSFORM ULTRA are engineered to meet these demands, offering superior protection and performance for electrical systems.
The requirement for this high level of performance must now be integrated with the rapid growth of global market, sustainability and eco-friendly products has become the key priorities in operation that prioritize environmental sustainability. The goal is to reduce carbon footprint and minimize environmental impact as much as possible, which requires that these high-performance oils evolve to maintain their protective capabilities while aligning with the critical goal of environmental sustainability.
In mid-2026, PSP Specialties will launch BIO-BASED TRANSFORMER OIL developed from renewable plant-based feedstocks by Thai researchers. The product will be available in several grades such as NE, PO and SE certified under ASTM D687, ASTM D8240 and IEC 61099 standard. It retains all of key product features of langis ng transformer such as sustainable power solution, designed for green projects, moisture & contaminant resistance, etc. Providing an additional option for enhancing environmental stability and reducing carbon footprint throughout operation.
PSP — Powering Industry with Quality, Innovation, and Reliability
P.S.P. Specialties Public Company Limited is Thailand’s leading one-stop solution provider for lubricants and oil-related products, with an annual blending capacity exceeding 250 million liters. Supported by a well-structured and stable corporate organization across manufacturing, logistics, and trading ventures. PSP ensures a strong supply chain and secure supply with always available stock to meet customer demand.
Our modern distribution center, covering over 20,000 m², features automated systems and complies with DOEB safety standards. Moreover, the Technology Center, certified with ISO 9001, ISO 14001, and ISO 45001 standards. Since 1989, PSP has been trusted for premium quality through advanced testing for lubricants, greases, and specialty oils.
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