Natural Ester Transformer Oil For Transformers I-20
Insulating oils, composed of deeply refined lubricant base oils blended with antioxidants, are primarily utilized as dielectrics in electrical appliances. Their key attributes are low-temperature functionality, superior oxidative stability, and low dielectric losses. Low-temperature performance signifies the oil's capacity to automatically convect, dissipate heat, and instantly extinguish arc currents in electrical devices under cold conditions. To achieve this, they must have a low pour point and low viscosity at low temperatures.
Product Details：Natural Ester Transformer Oil For Transformers I-20
Extracted via the distillation and refining of petroleum, transformer oil comprises a meticulously balanced mixture of alkanes, cycloalkanes, and aromatic unsaturated hydrocarbons. It is indispensable for insulating and cooling transformers and electrical machinery, utilizing its exceptional thermal conductivity to dissipate heat effectively, maintaining a stable transformer temperature, preventing failures due to overheating, and ensuring the seamless and secure progression of industrial production.
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
Prior to oil change, a detailed operational plan is formulated, and necessary personal protective equipment is prepared. When draining the old oil, complete evacuation is ensured with no residues left behind. During cleaning, special attention is given to removing sediments from the bottom of the tank. When infusing new oil, flow rate is controlled to prevent spillage. Post-oil change, oil quality analysis and equipment testing are conducted to ensure the transformer resumes normal operating conditions.
2. Electrical Performance Testing
The Dielectric Loss Index mirrors the degree of energy dissipation in transformer oil under electric field influence, enabling evaluation of the oil's electrical properties and detection of contamination or aging concerns.
The Breakdown Strength test quantifies the transformer oil's resistance to electrical stress limits. A diminished breakdown strength hints at heightened susceptibility to electrical failure, jeopardizing equipment functionality.
The Electrical Resistivity measurement verifies the transformer oil's insulation quality, ensuring it falls within specified ranges for reliable power equipment operation.
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