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Cabinet
It is made of steel sheet, coated with black lacquer, the screws are electroplated.
Running wheel
is made of Al alloy. The impeller is statically and dynamically balanced. The rotation of the blades is set by the manufacturer.
Motor
is asynchronous, depending on type with short armature, stator with cooling fins, lacquer finish. The motors are with class F insulation and operating temperature -40 to +70 ˚C. Ball bearings with grease packing for life. IP65 protection. Motors are equipped with thermal protection.
Speed control
is carried out by electronic or transformer regulators by changing the voltage, for three-phase types by frequency converters.
Rotation direction
can be changed. With a standard impeller, the flow rate drops by approx. 30% when the direction of rotation is reversed. The air flow is standard from the motor to the impeller.
Clamps
is made of black plastic as standard. In the single phase version it also contains a start-up capacitor. The terminal block is located on the motor.
Noise
emitted by the fan is tabulated, measurements are taken at a distance equal to three times the impeller diameter (but at least 1.5 m) in the free acoustic field.
Mounting
of the fans in each position of the motor axis.
