14.01.2019
40/185
The input signal for the first to the last but one fan stage is limited to the specified minimum speed plus 50% of
the maximum input signal. If a stage reaches this limit value, a further capacity stage is activated after a time
delay. The input signal for all now activated fans is calculated according to the following formula:
If the last fan stage is activated, the input signal can achieve its maximum value. Fans which have been shut
down via the motor overload cut-out will be ignored by the controller. The following diagram shows the speed
sequence for starting using the example of a system with five fans:
If the gas cooler outlet temperature is lower than the setpoint, the speed of all loaded fans is reduced to the
Содержание VS 3015 C
Страница 8: ...14 01 2019 8 185...
Страница 46: ...14 01 2019 46 185...