Centrifugal fans on which the impeller has backward curved aluminum blades, keyed directly onto the rotor of the electric motor.
Residual static pressure ESP = 200 Pa.
3-phase input, nominal voltage 400V (±10%), frequency 50Hz.
The impeller and rotor are dynamically balanced on two levels to quality level G2.5 (ISO 1940).
IP44/54 closed type, external rotor motor with anti-humidity protective coating, thermal contacts housed in the windings, and maintenance-free ball bearings. 100% adjustable voltage. Insulation class F; IP44/54 junction box. Galvanized steel sheet casing.
2 connection options: triangle (high speed) or star (low speed).
Compliant with EC Standards EN 60034-1, EN 60204-1, EN 61000-6-2, EN 61000-6-3.
Compliant with EC Directives 2004/108 EMC, 2006/95 LVD, 2009/125 ErP.
Power and sound pressure compliant with Standard EN 13487.
N.B.: the sound pressure level at a given distance is calculated in free field conditions, therefore it is merely indicative as it will be affected by the characteristics of the area where it is installed.