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Low pressure axial fans (duct installation)

HRFD 355/4/2

HRFD 355/4/2

High efficiency axial fan 3-ph., pole-switching, Dahlander windings air flow direction "B"

Ref.-No. 00396

Features

High efficiency axial fan with cylindrical duct with flanges on both ends, directly driven. Cylindrical duct in galvanised sheet steel covering impeller with two flanges on both ends. Dimensions and flange fixing holes to DIN 24155. Terminal box on outer casing. Highly efficient, profiled blade impeller from polymers, aerodynamically optimised to the application, dynamically balanced. Suitable for -30 °C to +60 °C. Totally enclosed, 3-phase squirrel cage motor, 2-speed (pole switching with Dahlander windings). Maintenance free with low-noise sealed for life ball bearings.

Technical Data

General Information
Ref.-No.:00396
Type:HRFD 355/4/2
Flow rate free-blowing:6150 m³/h
RPM:1400/2680 min-1
Number of poles:4 / 2
Voltage:400 / 400 V , 3 W , 50 / 50 ph
Rated current (FLC) uncontrolled:0.55/2 A
Nominal power:170/1100 W
Max. air flow temperature (uncontrolled):50 °C
IP protection category:55
Insulation class:F
PRODUCT_DETAILPAGE_wheel_diameter:355
Weight:18 kg
Wiring diagram no.:472
Acoustic data
Case breakout 71 dB(A) in 4 m