High Voltage Insulating Oil Solutions
Produced via a complex series of distillation and purification steps from natural petroleum, transformer oil is a man-made mineral oil. Its primary chemical component, naphthenic hydrocarbon, comprises nearly 80% of its entire composition, while the remaining elements are primarily aromatic hydrocarbons and alkanes. Transformer oil exhibits stable physical characteristics, with a relative density of 0.895, a freezing point generally under 45°C, and a flash point of at least 136°C.
Product Details：High Voltage Insulating Oil Solutions
Encompassing numerous advantages, insulating oils exhibit superior dielectric strength, elevated flash points, low viscosity, purity from organic acids, alkalis, and sulfur corrosion, excellent emulsification resistance, absence of sludge accumulation under regular use, rapid precipitation of arc waste, and a low pour point. These strengths enable them to perform impeccably in insulating and cooling tasks for electrical systems.
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
In general, the replacement interval for transformer oil ranges from 5 to 10 years. It is important to note that this is just an approximate range, and the actual replacement schedule should be determined by the specific situation of the transformer. The service life of transformer oil is a complicated matter affected by multiple factors. To maintain normal transformer operation and prolong its lifespan, regular inspections and assessments of the transformer oil are recommended, with timely replacements as necessary.
2. Factors Affecting Service Life
Transformer Load: When a transformer consistently operates under high load, the oil may age faster, resulting in a reduced service life. Consequently, reasonable control of the transformer load is crucial for extending the oil's longevity.
Oil Quality: The quality of transformer oil is a significant factor impacting its lifespan. High-quality oils offer better thermal stability and anti-aging properties, which can help extend their service life. Conversely, lower-quality oils may experience rapid aging, leading to a shorter lifespan.
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"The industrial lubricating oil from Haikun is a real lifesaver. It's efficient, long-lasting, and comes with all the necessary certifications. – Australia, David Lee"
