Vegetable IEC 60296 Transformer Oil Cooling Solutions
In switchgear applications, the main function of transformer oil is to extinguish arcs. When an oilimmersed switch disconnects from a power load, an arc occurs between the stationary and movable contacts. The temperature of this arc can become extremely high, potentially leading to equipment burnout and creating overvoltage situations that may harm the apparatus. As the oilimmersed switch begins to open and close, the high temperatures generated by the arc lead to rapid thermal decomposition of the oil, producing about 70% hydrogen. Due to hydrogen's superior thermal conductivity (41), it can absorb significant amounts of heat and transfer it to the oil, which cools the contacts and effectively extinguishes the arc.
Product Details：Vegetable Oil Transformer Cooling Solutions
Insulating oil, alternatively known as liquid insulating medium or dielectric liquid, is a fluid employed to electrically isolate conductors with varying potentials. By replacing gases and filling gaps within or between solid material poles, it amplifies dielectric performance and enhances heat dissipation capabilities in electrical apparatus. As a pivotal insulating component, proficient usage and maintenance of insulating oil are necessary to uphold the seamless functioning and safety of electrical installations.
Parameter：
Sports Event | Quality Indicators | measured value | Test Methods |
Functional characteristics | |||
Pour Point/°C | -50 | -57.5 | ISO 3016 |
Kinematic viscosity (40℃)/(m㎡/s) | ≯12 | 9.52
| ISO 3104 |
Kinematic viscosity (-10°C)/(mm²/s) | ≯1800 | 1028 | ISO 3104 |
Water content/(mg/kg) | ≯30/40 | 9.0 | IEC 60814 |
Breakdown voltage/kV (untreated oil) | ≮30 | 64.5 | IEC 60156 |
Density (20°C)/(g/ml) | ≯895 | 886 | ISO 12185 |
Dielectric loss factor (90°C) | ≯0.005 | 0.0005 | IEC 60247 |
Refining/stabilizing properties | |||
exterior condition | Clear and transparent, free of sediment and suspension (of atmospheric pollution) | Clear and transparent, free of sediment and suspension (of atmospheric pollution) | visual assessment |
Acid value (mgKOH/g) | ≯0.01 | 0.0008 | IEC 62021- 1 |
Interfacial tension/(mN/m) | No general requirements | 45.3 | ISO 6295 |
Total sulfur content (mass fraction)/% | No general requirements | No general requirements | ISO 14596 |
corrosive sulfur | non-corrosive | non-corrosive | DIN 51353 |
Content of antioxidant additives (mass fraction)/percent Oil with antioxidant additives (U) | ≯0.08 | 0.065 | IEC 60666 |
2-Furfural content/(mg/kg) | ≯0.1 | 0.012 | IEC 61198 |
Operational characteristics | |||
Oxidation stability (120°C) Test time: 332h | - | - | - |
--Total acid value (in KOH)/(mg/g) | ≯1.2 | 0.04 | IEC 61125 Act C |
--Oil sludge (mass fraction)/% | ≯0.8 | 0.020 | IEC 61125 Act C |
--Dielectric loss factor (90°C) | ≯0.500 | 0.004 | IEC 60247 |
Gassing/(mm/min) | No general requirements | No general requirements | IEC 60628 |
Health Safety and Environmental Characteristics (HSE) | |||
Flash point (closed)/°C | ≮135 | 148.2 | ISO 2719 |
PCA content (mass fraction)/% | ≯3 | 0.8 | BS 2000 Part 346 |
Polychlorinated biphenyl (PCB) content/(mass fraction)(mg/kg) | undetectable | undetectable | IEC 61619 |
1. Environmental Friendliness of Transformer Oil
Low toxicity: The formulation of modern transformer oils has undergone significant improvements, resulting in many new oils that are much less toxic and have a diminished impact on both aquatic and terrestrial organisms.
Non-hazardous components: Some of the latest transformer oils are made with non-hazardous materials, which eliminates the use of harmful chemicals such as polycyclic aromatic hydrocarbons (PAHs) and chlorinated compounds that are typically found in older oil formulations.
2. Market Research Analysis
The market serves a wide array of sectors, including the sub100 MVA niche, industrial users, and power utilities. Transformer oil is instrumental in ensuring the stability, trustworthiness, and transmission prowess of electrical power networks. It alleviates issues pertaining to thermal stress, excessive heat, and dielectric strength in transformers, circuit breakers, switchgear apparatus, capacitors, boilers, oil refineries, and power generation facilities. Moreover, the market evolves alongside emerging trends like highperformance computing technology, the rise of electric vehicles, and the integration of HVDC transmission systems. The International Energy Agency predicts a persistent growth trajectory for the transformer oil market, driven by the growing electricity requirements and the shift towards renewable energy sources.
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