Before installing the frequency converter, check the ambient air for liquids, particles, and gases. This is done by observing existing installations in this environment.

Typical indicators of harmful airborne liquids are water or oil on metal parts, or corrosion of metal parts.

Excessive dust particle levels are often found on installation cabinets and existing electrical installations. One indicator of aggressive airborne gases is blackening

of copper rails and cable ends on existing installations.

NB!

Unit Sizes 4x and 5x 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 GE for additional information.

2.5 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:

IEC/EN 60068-2-64:

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.

Vibration (sinusoidal) - 1970

Vibration, broad-band random

AF-600 FP Design Guide

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