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For electrical insulation ethyl silicone oil such as IOTA 20565, suppliers need to confirm at least the equipment type, operating temperature, voltage class, insulation requirements, application method, contacting materials, operating environment, viscosity requirement, volatility, service life and acceptance criteria.
Silicone oils have different requirements for various electrical equipment. When used for insulation, moisture proofing, lubrication, sealing or cooling, the concerned performance indicators vary.
Therefore, a reasonable inquiry process is not to quote immediately after the customer requests "insulating silicone oil". Instead, complete working conditions should be collected first to judge whether IOTA 20565 is suitable, or further recommend other silicone oil grades.
IOTA Silicone Oil (Anhui) Co., Ltd. supplies silicone oils, silicone rubbers, silicone resins, fumed silica and functional organosilicon materials. We can assist in preliminary material selection according to customers’ equipment and application conditions.
Equipment differs in temperature, electric field strength, structure, materials and oil application methods. Therefore, the first step is to confirm which equipment the silicone oil will be used in and its function.
Especially for electrical equipment running over long periods, qualified initial insulation performance does not guarantee stability under prolonged high temperature, humidity and electric field.
For silicone oil, the combination of temperature, time and environment matters more than a standalone maximum temperature value.
Equipment type and function to confirm:
If the customer cannot specify the equipment, at minimum confirm the equipment name, silicone oil application position and its function.
For inquiries of electrical insulating materials, obtain the parameters below as much as possible:
| Parameter | Details to confirm |
|---|---|
| Working voltage | Normal voltage and maximum working voltage |
| Voltage type | AC, DC or pulse voltage |
| Electric field condition | Local high electric field or not |
| Insulation requirement | Required insulation class |
| Dielectric strength | Required value and test method |
| Dielectric constant | Defined target value (if any) |
| Dielectric loss | Whether tanδ needs to be controlled |
| Volume resistivity | Minimum required value (if any) |
| Water content | Control standard for moisture |
| Cleanliness | Requirements for particles and impurities |
| Service life | Continuous operating time or design lifespan |
| Test method | Specific test standard adopted by the customer |
Note: Data obtained via different test methods cannot be directly compared. If the customer has an incumbent product, request TDS and COA of the existing product first for property matching.
Customers often ask simply: “Do you have electrical insulating silicone oil?” However, silicone oil viscosity directly affects fluidity, wetting, heat dissipation and operation inside equipment.
Therefore confirm:
If the customer has no clear viscosity requirement, narrow down candidate grades based on equipment structure, flow requirement and operating temperature.
During long-term operation, silicone oil for electrical equipment may be subjected to:
Key working conditions to verify:
Especially for high-temperature electrical equipment, long-term suitability cannot be judged merely by the "high temperature resistance" description in product names.
Electrical equipment is usually composed of multiple materials. IOTA 20565 may come into contact with:
Thus the customer needs to provide main contacting materials. Special attention to:
Suppliers cannot infer full compatibility with the whole equipment just because the silicone oil itself is stable.
If customers seek alternatives for their existing insulating silicone oil, request:
If customers replace imported products, avoid searching for identically named substitutes only by product title. Compare viscosity, density, electrical properties, volatility, thermal stability, impurity control and actual service conditions first.
When problems occur with electrical insulating silicone oil, identify failure phenomena first.
| Failure phenomenon | Priority investigation points |
|---|---|
| Degraded insulation | Moisture, contamination, aging, test method, equipment status |
| Reduced breakdown voltage | Moisture, particles, impurities, bubbles, sampling method |
| Viscosity change | High temperature, oxidation, contamination, mixing with other oils |
| Yellowing | Thermal aging, contamination, prolonged high temperature |
| Bubble generation | Moisture, volatile matter, equipment sealing, oil filling method |
| Increased volatilization | Temperature, sealing status, oil composition |
| Oil leakage | Seals, equipment structure, thermal expansion and installation |
| Seal deformation | Compatibility between oil and rubber materials |
| Abnormal equipment temperature rise | Oil fluidity, circulation condition and equipment heat dissipation |
| Long-term performance drop | Temperature, time, moisture, contamination and equipment operation |
"Poor insulation performance" is only a phenomenon rather than a confirmed root cause.
Before practical application, verify:
For high-spec electrical equipment, cleanliness, dryness and storage condition of oil are equally important.
| Category | Minimum information to collect |
|---|---|
| Equipment | Transformer, capacitor, cable termination, switchgear, etc. |
| Application position | Inside equipment, surface, sealing part or impregnation system |
| Function | Insulation, cooling, lubrication, moisture proofing or sealing |
| Temperature | Normal temperature, peak temperature and duration |
| Voltage | Normal and maximum working voltage |
| Viscosity | Target cSt/cPs and viscosity test temperature |
| Contact materials | Metals, plastics, rubbers, resins, etc. |
| Environment | Air exposure, sealed, vacuum, high humidity, etc. |
| Service time | Short-term, long-term or continuous operation |
| Existing product | Brand, model, TDS, COA (if any) |
| Failure issue | Insulation drop, discoloration, volatilization, leakage, etc. |
| Acceptance standard | Test methods and qualified limits |
| Purchase quantity | Sample, trial order or bulk order |
The above information supports suppliers in completing the first-round product screening.
IOTA 20565 electrical insulation ethyl silicone oil is mainly designed for applications requiring electrical insulation, thermal stability, chemical stability and lubrication.
Potential applications:
Nevertheless, suitability for specific equipment still needs verification combined with actual voltage, temperature, structure, materials and test requirements.
Transformers are potential application scenarios for evaluation. However, suitability cannot be confirmed merely by equipment name. Transformer structure, temperature, electrical requirements, oil circulation mode and customer technical standards need to be checked.
No single indicator applies to all equipment. Generally, comprehensive evaluation on dielectric strength, dielectric loss, volume resistivity, viscosity, volatility, water content, thermal stability and long-term reliability is required.
We can preliminarily narrow down candidate grades according to internal fluidity, wetting, circulation, lubrication and working temperature of the equipment, then confirm final viscosity by sample testing.
Mixing is not recommended without prior validation. Different base oils, additives, viscosity grades and impurity control may lead to property changes.
At minimum ask for normal temperature, peak temperature, duration, voltage, equipment type, target viscosity, contacting materials and insulation performance requirements.
Request the model, TDS, SDS and COA of the incumbent product, compare parameters first, then carry out sample testing and field condition verification.
IOTA 20565 Electrical Insulation Ethyl Silicone Oil Applicable to industrial scenarios requiring electrical insulation, thermal stability and chemical stability. Suitability needs verification based on equipment structure, temperature, voltage, contacting materials and acceptance criteria.
Special Functional Silicone Oils IOTA supplies silicone oils with different chemical structures and functions for lubrication, mold release, heat transfer, insulation, damping, low-temperature and other industrial scenarios.
Silicone Resins & Organosilicon Materials IOTA provides silicone resins and organosilicon materials for electrical insulation, protection, adhesion and high-temperature coating applications.
Selection of electrical insulating silicone oil is not simply finding a product with good insulation performance. Voltage, temperature, time, medium, equipment structure, contacting materials and acceptance criteria should be considered together. The more complete information customers provide, the easier it is for suppliers to shortlist candidate products and avoid mismatches in viscosity, thermal stability and material compatibility after sample testing.
