High performance silicone transformer liquid
LK-STO 50
Next-Generation Cooling & Insulating Solution for High-Voltage Equipment
LK-STO 50 is a crystal-clear, non-toxic, non-halogenated silicone-based transformer fluid engineered for high-performance electrical insulation and efficient thermal management. Based on 50 cSt PDMS, it delivers unmatched dielectric strength, oxidation resistance, and environmental safety ideal for transformers and electrical systems that demand reliability across extreme conditions.
Key features
- High Dielectric Strength: Excellent electrical insulation; meets IEC 836 and ASTM D 4652-92 standards.
- Superior Thermal Stability: Withstands extreme temperatures and resists oxidation ideal for long-term transformer performance.
- Enhanced Heat Dissipation: As a liquid system, it efficiently removes heat from the core and coil, offering greater overload capacity, lower maintenance, and extended insulation life a distinct advantage of silicone fluids.
- Optimal Viscosity (50 cSt): Ensures efficient flow and reliable cooling under various operating conditions.
- Safe & Environmentally Friendly: Non-toxic, non-halogenated, and additive-free; classified as non-hazardous and safe for long-term use.
- Moisture & Chemical Resistance: Inert and stable even in harsh environments, protecting internal components.
- High Fire Safety Margin: Flash point above 285°C and fire point of 370°C, with lower heat release than other Class K liquids.
- Broad Material Compatibility: Compatible with a wide range of solid insulation materials, enhancing design flexibility.
Typical Properties
| Parameter | Unit | Value |
|---|---|---|
| Appearance | – | Crystal Clear Liquid |
| Density at 25°C | g/cm³ | 0.96 |
| Viscosity at 25°C | cSt | ~ 50 |
| Water Content | ppm | < 50 |
| Specific Heat | kJ/kg·K | 1.51 |
| Thermal Conductivity | W/m·K | 0.151 |
| Refractive Index at 25°C | – | 1.404 |
| Breakdown Voltage | kV | 50 |
| Relative Permittivity at 25°C | – | 2.5 |
| Dissipation Factor at 25°C | – | 0.0001 |
| Volume Resistivity at 25°C | Ohm·cm | 1.0 × 1014 |
| Flash Point (Open Cup) | °C | ~ 300 |
| Fire Point (Open Cup) | °C | Above 340 |
| DC Resistivity | GΩ·m | Above 100 |
| Pour Point | °C | Below minus 50 |
Applications:
LK-STO 50 is specially designed for use in transformers as a cooling and insulating liquid. One of its key advantages is its ability to efficiently remove heat from the transformer’s core and coil assembly. This helps the transformer to:
- Handle higher electrical loads
- Require less maintenance
- Achieve a longer operational life
Silicone liquids like LK-STO 50 offer the highest thermal stability among all insulating fluids, making them ideal for demanding and high-temperature applications.
