Advanced Dielectric Fluid Technology
Manufactured from natural petroleum through a meticulous distillation and refining procedure, transformer oil is a synthetic mineral oil. Its vital chemical makeup is dominated by naphthenic hydrocarbon, making up roughly 80% of its total content, with the remainder being primarily aromatic hydrocarbons and alkanes. Transformer oil possesses stable physical attributes, characterized by a relative density of 0.895, a freezing point generally less than 45°C, and a flash point exceeding 136°C.
Product Details：Advanced Dielectric Fluid Technology
Insulating oils possess diverse advantages, encompassing high dielectric integrity, high ignition thresholds, low fluid viscosity, absence of harmful organic acids, alkalis, and sulfur corrosion, effective resistance to emulsification, negligible residue formation under standard operating conditions, prompt elimination of arc by-products, and a low freezing point. These features empower them to excel in insulating and cooling applications within electrical devices.
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
Typically, the replacement interval for transformer oil is between 5 and 10 years. However, please note that this is only a general reference range, and the actual replacement interval needs to be evaluated according to the specific conditions of the transformer. This is because the service life of transformer oil is a complex issue that is influenced by a variety of factors. In order to ensure the normal operation and prolong the service life of the transformer, it is recommended that the transformer oil be inspected and evaluated regularly, and be replaced in a timely manner according to the actual situation.
2. Factors Affecting Service Life
Transformer Load: If a transformer is subjected to prolonged high loads, the oil may age at an increased rate, shortening its service life. Hence, controlling the transformer load effectively is vital for maximizing the oil's longevity.
Oil Quality: Transformer oil quality is a key factor that affects its service life. High-grade oil exhibits improved thermal stability and resistance to aging, which can help prolong its lifespan. On the other hand, low-quality oil may deteriorate rapidly, resulting in a shorter lifespan.
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