AEQ / ADQ / AER / ADR Axial Fans

 

Electrical Connection

The motors are connected to an external terminal box in protection class IP44.

Fan Performance Curves

The performance curves for these fans have been esatblished in mounting position A (free inlet, free outlet) and indicate the static pressure increase Δpfa as a function of the volume flow (measured with inlet cone and without protection guards).

Noise Levels

The fan curve gives the A-weighted sound power level LWA6 on the outlet side in decibel. The A-weighted sound power level at the inlet side LWA5 is identical to LWA6. The A-weighted sound power level radiated from the casing (LWA2) according to DIN 45 635, part 38, is obtained approximately as follows: LWA2 ≈ LWA6 - 8 dB (for AER or ADR).

The A-weighted sound pressure level LPA at a distance of 1 metre is obtained approximately by deducting 7 dB(A) from the A-weighted sound power level: LPA(1m) ≈ LWA2 - 7 dB

It is important to note that reflexion and environmental characteristics as well as resonant frequencies influence the sound pressure levels in different ways.

The A-weighted octave sound power level is important for the choice of suitable sound attenuators. It is obtained as follows: LWAokt = LWA6 + LWArel