Protecting VFD-Driven Motors in
AIRPORTS

The Push to Make Airports “Green”
Spurred on by the promise of energy savings and reduced operating costs, America’s airports are taking a hard look at their equipment and procedures in an e  ort to become more “green”.

The Promise of VFDs
One of the most promising opportunities for reducing energy consumption in HVAC systems involves the use of variable frequency drives (VFDs) to control the speed of motors. In fact, in such applications VFDs have been shown to reduce energy consumption by 20 to 30%. The use of VFDs on baggage handling and delivery systems not only saves energy, but by precisely controlling the motor’s speed, it ensures smooth conveyor operation and improves the baggage handling process.

The Need for Shaft Grounding on
VFD-Driven Motors
Regardless of the application, VFDs can damage the motors they control. They induce currents on motor shafts that discharge through the bearings, causing pitting, fluting, and catastrophic motor failure. Without bearing protection, any savings from the use of VFDs can be quickly wiped out by the cost of replacing motors and by system downtime.

Proven, Long-Term Bearing Protection
By diverting bearing currents safely to ground, AEGIS^® SGR Shaft Grounding Rings ensure the reliable, long-term operation of VFDdriven motor systems, locking in energy savings and making these systems truly sustainable and truly green!