Should forced ventilation be installed in high and low voltage substations of 35KV and below?
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In accordance with the previous construction specifications for substations of power users with 35 KV and below, the distribution equipment should be equipped with an emergency exhaust fan that provides at least 10 air changes per hour; this emergency exhaust fan can also be used for normal ventilation purposes. In the design specifications for substation systems of power users at 20 KV and below, natural ventilation is the most economical ventilation method and should be the design principle to be considered first. In practical applications, power supply departments in some areas require the installation of forced ventilation systems; otherwise, power supply will not be provided. And in some areas, the power authorities do not take this into consideration.
\"DLT 5725-2015 Code for Construction of Substations for Power Users at 35 kV and Below\", 15.4.1.2 The distribution equipment shall be equipped with emergency exhaust fans that can provide at least 10 air changes per hour; such fans can also be used for normal ventilation purposes.
Yes, that’s true, but the 20KV standards actually recommend natural ventilation. The requirements put forward by power supply departments in different regions vary as well, which is why I am confused.
In the end, I decided to break through the wall and install a fire axial fan. In terms of safety, it’s better to have one more device in place for peace of mind.