Natural Ester Transformer Oil I-20 Model
Insulating oils, formulated using deeply processed lubricant base oils and fortified with antioxidants, are primarily employed as dielectrics in electrical installations. Their key properties are low-temperature operation, exceptional oxidative stability, and reduced dielectric losses. Low-temperature performance implies the oil's capacity to convect, dissipate heat, and promptly sever arc currents in electrical devices under chilled conditions. As a result, they must exhibit a low pour point and low viscosity at low temperatures.
Product Details：Natural Ester Transformer Oil I-20 Model
Derived from the fractional distillation of petroleum, transformer oil comprises a complex mixture of alkane, cycloalkane, and aromatic hydrocarbons, refined from raw petroleum. Its primary function lies in insulating and cooling transformers and electrical equipment, effectively transferring internal heat to facilitate machine cooling. This ensures temperature stability within the transformer, mitigating the risk of overheating-related failures and securing the integrity of the production process.
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. Electrical Performance Testing
Dielectric loss factor: reflect the transformer oil in the electric field under the action of the loss of the size of the index, can understand the electrical performance of the oil and whether there is pollution or aging and other issues.
Breakdown voltage: test transformer oil to withstand the limit of electric stress situation indicators, low breakdown voltage may indicate that the oil is susceptible to electric breakdown, affecting the normal operation of equipment.
Resistivity: measure transformer oil conductivity indicators, qualified transformer oil resistivity should be in the specified range to ensure the normal operation of power equipment.
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