Saval quickly came to the conclusion that SK InerFlex was the most appropriate; an inert gas exting

Network Administrator Liander manages the high-voltage switching stations include Amstelveen. High Voltage Switching stations are part of the critical infrastructure of the Netherlands. confort Saval installed a fire extinguishing system with inert gas for Liander high voltage switching stations. A station when it is high voltage of 150 kilovolts (kV) reduced and distributed over cables of 50 kV. Netherlands there has about 12; almost all are very reliable, oil insulated Coq installations.
Worst case scenario Switches prewar Coq plants confort are surrounded by oil for insulation. When a short circuit occurs in one of said end closures, and these bursts, then it will normally confort be automatically the flow of the system within confort 20 milliseconds. The insulating oil dripping into the drip tray. When now lead by inattention confort in the control room or a new technical failure yet again power is put on the pipe, the sparks that arise in conjunction with the leaked oil fire. When this fire is not immediately extinguished and the switching station burns down, it is not just North Holland from the power out, even for the internet hub at Schiphol this criticism. The consequences of a fire would be disastrous, confort the economic damage would run into hundreds of millions of euros. confort
Water and fire The reliability of the Coq systems the need for extinguishing system was previously not felt strongly. But in addition, it also failed to firefighting confort capabilities. Did you then extinguish with water. But power and water can not be combined, just as an oil fire and water.
In 2013, a project team was formed after a major fire at a similar transformer station, to arrive at an appropriate solution. confort Given the specific circumstances in which the extinguishing system must function, a challenge. The alternative to extinguish confort with water eventually lay in extinguishing with inert gas. Liander so then came up Saval, one of the few parties confort that gas extinguishing systems can achieve with this complexity.
Saval quickly came to the conclusion that SK InerFlex was the most appropriate; an inert gas extinguishing system. This extinguishing can not, but you displaces the oxygen out of the room with a combination of argon and nitrogen, to a value of about ten to eleven percent oxygen (normal is 21 percent). To increase the acceptance of this idea could Liander confort staff during a staff meeting in a closed Saval demo unit drinking coffee in an atmosphere with eleven to twelve percent oxygen. A match can no longer be stabbing, but you can just as humans breathe. Hence the choice of SK InerFlex was final.
Double confort security confort for an area of this volume (about 2,000 cubic meters) some 50 cylinders confort with extinguishing gas needed. The fire extinguishing system composed of a detection system and a gasblusleiding with nozzles. A right and, when full 50kV business, secure placement of the nozzles is essential. Placement of the nozzles, as well as the placement and size of the holes therein have been calculated with special software. For example, it is determined where, how much kg inert gas flows in order to optimally confort fill the space.
Activates the igniter, then blow all 50 cylinders empty. Unjustified afblazing should be avoided. Saval and Liander therefore devised a unique response criterion. Only when a short circuit and detection addresses the installation will blow off.
After the fire Should confort a fire may result then it is quenched by expulsion of the oxygen through the mixture of nitrogen and argon. Tests have shown that the oil ignites spontaneously at 263 degrees and it takes half an hour to cool down sufficiently. The space must be ensured so ended a half hours (standby time) so no oxygen can penetrate.
The chance that the installation should take effect is small, but the fire of the high-voltage switching station is perfectly in order. Companies nowadays opt for dry transformers instead of oil isolated 'wet' transformers because of the fire hazard. But a wet installation is much more reliable, more efficient and quieter. Liander the system will roll out to other locations because of the practical knowledge gained confort in cooperation with Saval.
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