NB!
D and E enclosures have a stainless steel back-channel option to provide additional protection in aggressive environments. Proper ventilation is still
required for the internal components of the drive. Contact Danfoss for additional information.
2.6 Vibration and shock
The frequency converter has been tested according to the procedure based on the shown standards:
The frequency converter complies with requirements that exist for units mounted on the walls and floors of production premises, as well as in panels
bolted to walls or floors.
IEC/EN 60068-2-6:
Vibration (sinusoidal) - 1970
IEC/EN 60068-2-64:
Vibration, broad-band random
2.7 Advantages
2.7.1 Why use a Frequency Converter for Controlling Fans and Pumps?
A frequency converter takes advantage of the fact that centrifugal fans and pumps follow the laws of proportionality for such fans and pumps. For further
information see the text
The Laws of Proportionality
.
2.7.2 The Clear Advantage - Energy Savings
The very clear advantage of using a frequency converter for controlling the speed of fans or pumps lies in the electricity savings.
When comparing with alternative control systems and technologies, a frequency converter is the optimum energy control system for controlling fan and
pump systems.
Illustration 2.1: The graph is showing fan curves (A, B and
C) for reduced fan volumes.
Illustration 2.2: When using a frequency converter to reduce
fan capacity to 60% - more than 50% energy savings may
be obtained in typical applications.
VLT
®
AQUA Drive Design Guide
2 Introduction to VLT AQUA Drive
MG.20.N5.02 - VLT
®
is a registered Danfoss trademark
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