Which dielectric fluids classifications are important to understanding fire safety?
IEC 61039 identifies “less flammable fluids” as those with a fire point >300°C. These are designated as K class fluids.
According to IEC 61936 transformers filled with K-class fluids can have reduced fire protection measures.
In addition, certifiers such as FM Global provide a list of approved Less Flammable Transformer Fluids and guides for safe installation.
Using a high fire point fluid significantly reduces the chance of a pool fire.
What does this mean for MIDEL? There has never been an oil fire reported in the past 40 years in transformers using MIDEL ester fluids.
Fire Point Comparison: Dielectric Fluids
The use of ester transformer fluids for increased fire safety and reduced costs.
More questions on ester fluids?
This post is one of the 15 top questions we get asked on retrofilling transformers with ester fluids. Here is the full list of the frequently asked questions on ester fluid retrofilling: