The electrical room refers to the indoor power distribution space equipped with transformers, electric switchboards and low-voltage power distribution boards.  Large-scale buildings are generally equipped with multi-level power distribution rooms to conduct multi-level distribution of electric power and provide power sources for critical equipment in the building. At the same time,  power distribution rooms also have the equipment for undertaking the communication between apparatus. ​

 

The architectural characteristics of the electrical room depend on the range of equipment to be installed. The complex electrical cable arrangement on the ceiling cable tray and the high voltage and current operating environment make the power distribution room at high risk of ​​fire. PNED particle charging aspirating smoke detector for very early fire warning has unique detection advantages for such fires with electrical faults as the main triggering factor. In the very early stage of fire, the low-temperature thermal decomposition initially occurs in electrical components with low current tolerance, such as exposed conductors, power connectors, headers, etc. The metal wire and its exclosure insulating out layer are pyrolyzed due to overloading, releasing a large concentration of pyrolysis particles. We name this stage the "low-temperature pyrolysis stage".

 

Low-temperature pyrolysis stage is of great significance for very early fire warning because it is the very first detectable signal generated by the fire. The PNED particle charging ASD can perform effective detection for these nano-scale pyrolysis particles and analyse the characteristics of the smoke particle. Characteristics such as charges, concentration and diameter all contribute to accurate fire detection. At the same time, a deep understanding of smoke particles' characteristics ensures a strong rejection ability against false alarms.

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