Mineral Oil For Enhanced Transformer Cooling
As the most commonly employed liquid dielectric in transformers, mineral oil, sourced from natural petroleum, excels in insulation and plays a crucial part in maintaining transformer efficiency through heat dissipation and arc elimination. In the occurrence of an arc, the oil swiftly impacts and cools it, resulting in arc extinguishment. Simultaneously, it effectively evacuates heat and gaseous byproducts from the discharge region, swiftly reducing the voltage in the discharge field, thereby containing the discharge efficiently.
Product Details：Mineral Oil for Enhanced Transformer Cooling
Our transformer oil is formulated to maintain robust chemical stability even under challenging conditions such as high temperatures and oxidation, resisting degradation and maintaining its performance over long periods. By incorporating the appropriate amount of antioxidants, we've elevated its chemical resilience, enabling it to excel in insulation, cooling, and machine protection, achieving remarkable performance.
PARAMETER：
Sports Event | GB2536-2011 1-20°C (special) indicator | Typical Properties | Test Methods |
Minimum Cold Commissioning Temperature (LCSET)/°C | -20 | - | - |
Functional Characteristics | |||
Pour Point/°C | ≯-30 | <-35 | GB/T 3535 |
Kinematic Viscosity (40°C)/(Mm²/S) | ≯12 | 66 | GB/T 265 |
Kinematic Viscosity (-20°C)/(Mm²/S) | ≯1800 | 503 | |
Water Content/(Mg/Kg) | ≯30 | 21 | GB/T 7600 |
Breakdown Voltage/KV Untreated Oil | ≮30 | 69 | GB/T 507 |
Density (20°C)/(Kg/M³) | ≯895 | 886.7 | SH/T 0604 |
Aniline Point／℃ | reporting | 78 | GB/T 262 |
Dielectric Loss Factor (90°C) | ≯0.005 | 0.0005 | GB/T 5654 |
Refining/Stabilizing Properties | |||
Exterior Condition | Clear and transparent, no sediment | Clear and transparent, no sediment | visual assessment |
Acid Value (in KOH)/(Mg/G) | ≯0.01 | <0.01 | NB/SH/T 0836 |
Water-Soluble Acids or Bases | not have | not have | GB/T 259 |
Interfacial Tension/(MN/M) | ≮40 | 46 | GB/T 6541 |
Total Sulfur Content (Mass Fraction)/% | ≯0.15 | 0.002 | SH/T 0689 |
Corrosive Sulfur | non-corrosive | non-corrosive | SH/T0804 |
Content of Antioxidant (Mass Fraction)/% | 0.08~0.40 | 0.30 | NB/SH/T0802 |
2-Furfural Content/(Mg/Kg) | ≯0.05 | <0.01 | NB/SH/T0812 |
Operational Characteristics | |||
Oxidation Stability (120°C) | - | - | NB/SH/T 0811 |
Test Time: 500h | - | - | |
--Total Acid Value (in KOH)/(Mg/G) | ≯0.3 | 0.15 | |
--Oil Sludge (Mass Fraction)/% | ≯0.05 | 0.02 | |
--Dielectric Loss Factor (90°C) | ≯0.050 | 0.024 | GB/T 5654 |
Gassing/(Mm³/Min) | reporting | +38 | NB/SH/T 0810 |
Electrically Charged Tendency (ECT)/(μC/M³) | reporting | 1 | DL/T 385 |
HSE Characteristics | |||
Flash Point (Closed)/°C | ≮135 | 142 | GB/T 261 |
PCA Content (Mass Fraction)/% | ≯3 | 1.5 | NB/SH/T 0838 |
Polychlorinated Biphenyl (PCB) Content/(Mg/Kg) | undetectable | undetectable | SH/T 0803 |
1. Transformer Oil Service Life
Generally, the replacement cycle for transformer oil falls between 5 and 10 years. It’s essential to note that this serves as a rough estimate; the true replacement frequency should be determined by the specific situation of the transformer.
In summary, the durability of transformer oil is a complex matter influenced by various elements. To maintain the proper functioning of the transformer and prolong its lifespan, it is recommended to conduct regular checks and evaluations of the transformer oil, replacing it promptly when necessary.
2. Factors Affecting Service Life
Transformer Load: When a transformer operates under heavy load for extended periods, the oil can age more quickly, leading to a reduced lifespan. Thus, effectively managing the transformer load is crucial for prolonging the oil's longevity.
Oil Quality: The quality of transformer oil significantly influences its lifespan. High-quality oil offers superior thermal stability and resistance to aging, which helps extend its service life. In contrast, lower-quality oil tends to age rapidly, resulting in a shorter lifespan.
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