Main fan unit started up
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In the startup conditions for the main fan unit, must the overspeed speed of the exhaust fan be 95% or higher? Thank you!
This condition generally does not apply in sequential sequences; achieving 95% is not a mandatory requirement – it depends on the operating conditions at the time. It is advisable to aim for a higher rotation speed, as this reduces the load when starting the motor and thus minimizes the impact on the entire power grid. Sometimes, when we start up, we turn on the main fan directly; at that time there is no smoke, and it works fine to start it using electricity.
It is not impossible to start the motor directly, but factors such as the motor’s power, the electrical grid load, and process parameters must be taken into consideration! Out of curiosity, what size are your catalytic devices?
If the device is relatively new, then the motors are fine nowadays!
If a standby unit is designed, the smoke extractor should be put into operation at around 90% speed, and then the main motor should be switched on