Fire Fighting Systems for Outdoor Transformers

Many of these transformers are accompanied by water spray fixed systems, commonly called transformer “deluge” systems, intended to extinguish a transformer fire.

High-velocity systems are often used to protect these transformers and the high-velocity nozzles are specifically designed to discharge a jet of water at high speed.

In this type of Water Spray System, the water jet forms a cone of the coarse spray of uniform density which is discharged over a defined area.

The coarse spray is able to penetrate the flame zone and reach the surface of the burning oil.

The turbulence created by the high-velocity spray forms an oil-in-water emulsion on the surface of the oil that will not burn. This “emulsification” is the principal way the fire is extinguished, along with a cooling and smothering effect.

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