AEGIS® PRO Series Rings Protect Pulp and Paper Plant Motors from VFD-Caused Bearing Failure

Paper Roller

Downtime in paper plants due to VFD induced motor bearing damage can be extremely costly, not only in terms of repair costs for equipment, but in terms of lost production.

Paper making is very demanding. To ensure tight control over critical process parameters, many motors are controlled by variable frequency drives (VFDs or inverters). These drives can be used to control the motors driving all manner of pumps and fans, grinders, winders and rewinders, and a host of related equipment.

 

But while VFDs allow precise control of motor speed or torque, they can also damage motor bearings and cause costly unplanned downtime. These drives create voltages on the shafts of the motors they control — voltages that can discharge through motor bearings. The resulting electrical bearing damage can cause bearing failure and stop production.

 

So the VFD technology employed to improve paper making processes also creates damage that can shut them down instead.  Paper Rolling MachineThese preventable bearing failures can cost hundreds of thousands of dollars in damaged equipment, repair costs, and lost production.

 

AEGIS® Shaft Grounding Rings protect motor bearings (and coupled equipment) by channeling shaft voltage discharge currents away from bearings safely to ground

 

An AEGIS® iPRO Ring (below) protects a 1000 hp winder motor from VFD-sourced bearing damage by channeling destructive shaft voltage discharges away from its bearings and safely to ground.

An AEGIS® PRO Ring (below) protects a 1000 hp
winder motor from VFD-sourced bearing damage
by channeling destructive shaft voltage discharges
away from its bearings and safely to ground.

AEGIS® SGR Rings are sized for low voltage motors of less than 100 hp.  The AEGIS® PRO Series Rings provides the high current carrying capacity needed for larger and medium-voltage motors.

 

By preventing extremely costly process downtime, AEGIS® Rings generate an impressive return on investment.

 

For more information on the AEGIS® PRO Series Ring, click here.

 

To review ROI calculations for an AEGIS® PRO Series Ring, click here.

 

For a case study on the installation of AEGIS® PRO Series Rings at a paper plant, click here.