High efficiency axial fans are used large for air volumes pressure. The fans with square inlet cone are used for ventilating restaurants, gymnasiums, conference rooms, workshops, ware-houses, swimming pools and greenhouses.
EQ / DQ – Axial fans with square wall plate
- low installation depth
- can be installed in any position
- delivered with a mounted protection guard (except size 1000)
- motor protection by thermal contacts
- speed is variable using auto transformers
The casings of high efficiency axial fans are made of galvanized sheet steel and are plastic coated. Axial fans with square wall plate can be attached to the holes provided in the wall.
The high efficiency axial fans have aerodynamically profiled blades. The blades are made of galvanized sheet metal, and are mounted directly to the rotor of the external rotor motor and are balanced dynamically together with the rotor according to quality level G2.5/G6.3 to DIN ISO 21940-11.
Sizes 200 to 300 = made of galvanized and lacquered sheet steel
Size 350-4.4EC = made of coated sheet steel
Sizes 315 to 630-6 = made of plastic
Sizes 630-4 to 1000 = made of aluminium
Motor and motor protection:
All Rosenberg fans are equipped with direct driven external rotor motors. All our fans have motor protection through thermal contacts in the motor windings as standard. The motors apply to protection class IP44/IP54.
Sizes 200 to 300 = motor protection class IP44
All other sizes = motor protection class IP54
The drive has due to an external rotor motor a space saving, compact and attractive design. The motor is fitted within the impeller, which enables the best possible cooling. For this reason a 100% variable speed control can be guaranteed. V-belts, additional tension bars and motor mounting devices are not necessary. Only well-dimensions ball-bearings, fitted on both sides and life time greased are used. Both ball-bearing seats are ground to high precision in one work process to eliminate any vibrations. External rotor motors have extremely low starting currents. The windings comply to isolation class F. In addition the windings have a standard moisture impregnation.