Fire extinguishing cover for concrete pit under electrical transformer with baffles plates EXTICOV-CCF

with natural flame extinction

The EXTICOV-CCF™ fire suffocating cover with slats for retention pits in electrical substations responds to the risks of hydrocarbon pool fires in transformers. This fireproof system, tested several times at the CNPP in accordance with ERDF (ENEDIS) specifications, complies with current international standards and laws and allows pits to be rehabilitated by replacing the bed of pebbles on gratings. Description The EXTICOV-CCF™ system is recommended for all types of retention pits preferably indoors : For recovery pits, fitted with fire-stop flaps, which communicate with either a fire-stop siphon or a remote pit directly. For so-called full retention pits, where at least 100% of the volume of oil potentially on fire will be in the retention pit The EXTICOV-CCF™ cover consists of reinforced single-slope fire shutters made of SONEC® technology 20/10 galvanised steel, placed in metal frames. These are then installed at the top of the pit on angles provided for this purpose. Single-slope shutters are an old patented technology, specially designed to accelerate the passage of burning hydrocarbons into the pit, under the shutters, much more quickly and efficiently than current models of double-slope or multi-slope shutters. Once the hot oils are “trapped” in the pit, the fire self-extinguishes almost instantly because the oxygen oxidant is not replenished. As the smothering process is very rapid, the temperature rise inside the pit is low and the thermal runaway that could accelerate the spread of the fire is rendered almost impossible.