Safety-Optimized Oil For Power Systems
Manufactured through a series of distillation and purification stages from natural petroleum, transformer oil is a synthetic mineral oil. Its vital chemical component, naphthenic hydrocarbon, comprises roughly 80% of its total composition, with the balance comprising mostly aromatic hydrocarbons and alkanes. Transformer oil possesses stable physical properties, including a relative density of 0.895, a freezing point generally below 45°C, and a flash point exceeding 136°C.
Product Details：Safety-Optimized Oil for Power Systems
Highlighting a multitude of virtues, insulating oils offer remarkable dielectric strength, high flash point values, low viscosity properties, purity from organic acids, alkalis, and corrosive sulfur, exceptional anti-emulsification performance, no slag accumulation during normal operation, swift disposal of arc residues, and a low pour point. These strengths contribute significantly to their exceptional insulating and cooling capabilities in electrical apparatus.
PARAMETER：
Sports Event | IEC60296:2020 TVAI (LCSET-40℃) Quality indicators | Typical properties | Test Methods |
Functional characteristics | |||
Pour Point/°C | ≯-50 | -63 | ISO 3016 |
Kinematic viscosity (40°C)/(mm²/s) | ≯12 | 7.0 | ISO 3104 |
Kinematic viscosity (-40°C)/(mm²/s) | ≯2500 | 1736 | IEC 61868 |
Water content/(mg/kg) | ≮30 | 68 | IEC 60814 |
Breakdown voltage/kV | - | IEC 60156 | |
--Untreated oil | ≮30 | 40-70 | |
--Treated oil | ≮70 | >70 | |
Density (20°C)/(kg/m³) | ≯895 | 865 | ISO 12185 |
Dielectric loss factor (90°C) | ≯0.005 | 0.0005 | IEC 60247 |
Refining/stabilizing properties | |||
saturation (color theory) | <0.5 | <0.5 | ISO 2049 |
exterior condition | clear and transparent | Clear and transparent, no precipitation | visual assessment |
Acid value/(mgKOH/g) | ≯0.01 | <0.01 | IEC 62021 |
Interfacial tension/(mN/m) | ≮43 | 47 | IEC 62961 |
Total sulfur content/% | ≯0.05 | 0.003 | ISO 14596 |
corrosive sulfur | non-corrosive | non-corrosive | DIN 51353 |
Potentially corrosive sulfur | non-corrosive | non-corrosive | IEC62535 |
DBDS/(mg/kg) | Not detectable (<5) | undetectable | IEC 62697-1 |
Antioxidant content/% | 0.08~0.4 | 0.37 | IEC 60666 |
Metal passivator/(mg/kg) | Not detectable (<5) | undetectable | IEC 60666 |
2-Furfural content and related substances (single component) (mg/kg) | Not detectable (<0.05) | undetectable | IEC 61198 |
Gas production characteristics (under thermal oxidation)/uI/L) | Hydrogen ≯ 50 | 9 | Appendix A4 Methodology (air-saturated, containing copper) |
Methane ≯ 50 | 1 | ||
Ethane ≯ 50 | 0.2 | ||
Operational characteristics | |||
Chlorine stability (500h) | - | - | IEC 61125 |
--Total acid value (mg (KOH)/g) | ≯0.3 | 0.02 | |
-- Oil sludge/% | ≯0.05 | <0.01 | |
--Dielectric loss factor (90°C) | ≯0.050 | 0.025 | IEC 60247 |
HSE Characteristics | |||
Flash point (closed)/°C | ≮135 | 145 | ISO 2719 |
PCA content/% | <3 | 1.2 | IP 346 |
Polyoxybiphenyl (PCB) content/(mg/kg) | Not detectable (<2) | undetectable | IEC 61619 |
1. Transformer Oil Service Life
Generally speaking, transformer oil replacement occurs every 5 to 10 years. It’s essential to understand that this is a broad reference point, and the specific replacement timing should be assessed according to the individual circumstances of the transformer. The durability of transformer oil is a complex topic influenced by several factors. To guarantee the transformer functions correctly and to extend its lifespan, it is recommended to routinely inspect and evaluate the transformer oil and replace it in a timely manner based on actual conditions.
2. Factors Affecting Service Life
Transformer Load: If a transformer is subjected to prolonged high loads, the aging rate of the oil can increase, leading to a shorter service life. Thus, it is important to manage the transformer load properly to extend the oil's lifespan.
Oil Quality: The quality of transformer oil plays a crucial role in determining its service life. Oils of high quality provide improved thermal stability and anti-aging properties, which can contribute to a longer lifespan. Conversely, poor-quality oils may age quickly, leading to a reduced service life.
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