Natural Ester Transformer Oil For Transformers I-20 Type 2
Transformer oil, a derivative of petroleum distillation, encompasses a blend of alkanes, cycloalkanes, aromatic hydrocarbons, and other constituents, meticulously refined from natural crude oil. It serves as a vital insulator and coolant for transformers and electrical appliances, boasting exceptional thermal conductivity to efficiently dissipate heat within, thereby maintaining transformer temperature within safe limits, averting overheating mishaps, and safeguarding the production process.
Product Details：Transformer Oil I-20 Model
Transformer oil, a mineral oil extracted through the distillation and purification of natural petroleum, comprises a precise blend of alkane, cycloalkane, and aromatic compounds. It serves as an essential element in insulating and cooling transformers and electrical devices, leveraging its superior heat conductivity to dissipate internal heat, thereby maintaining transformer temperature within optimal ranges, preventing overheating failures, and ensuring the smooth operation of the production line.
PARAMETER：
Sports Event | GB2536-2011 1-10°C (general purpose) Quality indicators | Typical properties | Test Methods |
Minimum Cold Commissioning Temperature (LCSET)/°C | -10 | - | - |
Functional characteristics | |||
Pour Point/°C | ≯-20 | -27 | GB/T 3535 |
Kinematic viscosity (40°C)/(mm²/s) | ≯12 | 9.4 | GB/T 265 |
Kinematic viscosity (-10°C)/(mm²/s) | ≯1800 | 145 | |
Water content/(mg/kg) | ≯30 | 19 | GB/T 7600 |
Breakdown voltage/kV Untreated oil | ≮ 0 | 68 | GB/T 507 |
Density (20°C)/(kg/m³) | ≯895 | 889.5 | SH/T 0604 |
Dielectric loss factor (90°C) | ≯0.005 | 0.0007 | GB/T 5654 |
Refining/stabilizing properties | |||
exterior condition | clear and transparent | clear and transparent | 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 | 44 | GB/T 6541 |
corrosive sulfur | non-corrosive | non-corrosive | SH/T0804 |
Antioxidant content (mass fraction) / % | 0.08~0.40 | 0.30 | NB/SH/T0802 |
2-Furfural content/(mg/kg) | ≯0.1 | <0.05 | NB/SH/T0812 |
Operational characteristics | |||
Oxidation stability (120°C) | - | - | NB/SH/T 0811 |
Test time: 500h | - | - | |
--Total acid value (in KOH)/(mg/g) | ≯1.2 | 0.20 | |
--Oil sludge (mass fraction)/% | ≯0.8 | 0.04 | |
--Dielectric loss factor (90°C) | ≯0.500 | 0.049 | GB/T 5654 |
HSE Characteristics | |||
Flash point (closed)/°C | ≮135 | 144 | GB/T 261 |
PCA content (mass fraction)/% | ≯3 | <3 | NB/SH/T 0838 |
Polychlorinated biphenyl (PCB) content/(mg/kg) | undetectable | not detected | SH/T 0803 |
1. Oil Change Procedure
In the preparation phase, transformer oil that meets specifications is selected, along with all necessary tools and equipment for the oil change. During the process, the bottom drain valve is opened first to collect and dispose of the old oil properly. After cleaning the oil tank, a filtration unit is installed, through which preheated new oil is infused. During the oil change, attention is paid to venting to prevent air bubbles from mixing in. Post-oil change, electrical tests are conducted to verify that transformer performance remains unaffected.
2. Physical and Chemical Performance Testing
Moisture Concentration: Moisture is a significant contributor to the insulation properties of transformer oil, requiring regular moisture content analysis to ensure stability.
Viscosity Assessment: The viscosity of transformer oil is fundamental to its cooling capabilities. Testing viscosity ensures that the oil can effectively dissipate heat during high-temperature operations while maintaining adequate fluidity in colder environments.
Combustion Thresholds: Flash point and ignition point serve as crucial benchmarks for assessing the flammability of transformer oil. Lower values may signify a heightened risk of oil volatility and ignition, thereby increasing the likelihood of fire incidents.
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