To make transformer stations safer and more reliable, and to minimise the risk of fire, Alfen a manufacturer of transformer stations, has introduced a unique detection system. Regular fire detection systems only detect at an advanced stage, but Alfen's system makes use of an Aspirated Smoke Detection (ASD) system, which allows for fires to be discovered at a very early stage, preventing the facilities from being completely burned.
Continuous smoke control
Alfen's detection system uses halogen-free PVC pipes throughout the station running through the low-voltage (LV) portion of the station in a U-shape. If a fire occurs, it will be in the LS area in the vast majority of cases.
The circuit takes air samples in both the low and medium voltage areas and at critical points in the station. This air is then analysed by a high-precision detector of smoke particles, which reacts to smoke particles during the very early stages of a fire. The system is based on air sampling by a double filter principle with a fixed stable laser source. This makes the product durable, because there is less air pollution and consequently less maintenance.
Immediate notification and disconnection in case of fire
If smoke is detected, the medium-voltage will be disconnected by means of a trip unit in order to take down the source; this will prevent the fire from spreading. Optionally, the system will then send a message to the computer reporting that the station has been turned off in response to smoke. Thanks to the system's accuracy, the probability of a false smoke detection is minimal.
Insurance companies, including Interpolis and Avéro Achmea, have recognised the benefits of the new fire detection system. These insurers advise entrepreneurs to take measures to restrict exposure to such risks.