BEST PRACTICES FOR Protecting Large Motors and Generators from Damaging Bearing Currents with AEGIS ® iPRO Rings AEGIS ® iPRO: Designed and Built for Maximum Bearing Protection and Long Life The AEGIS ® iPRO is a larger, beefier version of the AEGIS ® Bearing Protection Ring with the greater current-carrying capacity required for larger motors and generators. Through revolutionary AEGIS ® Nanogap Technology, it ensures effective electrical contact whether in physical contact with the motor shaft or not. Maintenance-free, it provides superior bearing protection for the normal service life of the motor’s bearings. 6 rows of conductive microfibers provide greater current-carrying capacity for larger motors Specially engineered microfibers flex without breaking, protect bearings for the life of motor Patented FiberLock ™ Channel secures fibers and protects them from contamination Shaft Shaft AEGIS ® Ring FiberLock ™ Channel Philadelphia, PA (800) 523-3382 Gastonia, NC (888) 456-6233 Hebron, KY (866) 598-5773 Pelham, AL (866) 987-1915 Tampa, FL (866) 839-4848 www.bartlettbearing.com “Full Circle Solutions” Bearing Cap Mounting SlimLine AEGIS ® iPRO Rings iPROSL Universal Brackets Custom Mounting Plate with tie bars Form 701-1/09-2015BB
Transcript
BEST PRACTICES FOR Protecting Large Motors and Generators
from Damaging Bearing Currentswith AEGIS® iPRO Rings
AEGIS® iPRO: Designed and Built for Maximum Bearing Protection and Long Life
The AEGIS® iPRO is a larger, beefier version of the AEGIS®
Bearing Protection Ring with the greater current-carrying capacity required for larger motors and generators. Through revolutionary AEGIS® Nanogap Technology,
it ensures effective electrical contact whether in physical contact with the motor shaft or not. Maintenance-free, it provides superior bearing protection for the normal service life of the motor’s bearings.
6 rows of conductive microfibers provide greater current-carrying capacity for larger motors
Specially engineered microfibers flex without breaking, protect bearings for the life of motor
Patented FiberLock™ Channel secures fibers and protects them from contamination
ShaftShaft
AEGIS® Ring
FiberLock™ Channel
Philadelphia, PA(800) 523-3382
Gastonia, NC(888) 456-6233
Hebron, KY(866) 598-5773
Pelham, AL(866) 987-1915
Tampa, FL(866) 839-4848
www.bartlettbearing.com“Full Circle Solutions”
Bearing Cap Mounting
SlimLineAEGIS® iPRO Rings
iPROSL Universal Brackets Custom Mounting Platewith tie bars
Form 701-1/09-2015BB
A “Full Circle” Solution
Solution: Install an AEGIS® Ringon the motor shaft’s drive end...Installing an AEGIS® iPRO Ring on the motor‘s drive end will provide a path of least resistance, channeling damaging VFD-induced currents away from bearings and safely to ground. Apply AEGIS® Colloidal Silver Coating to the shaft (where the ring’s microfibers will make contact) to improve conductivity and prevent oxidation.
To interrupt the path of high-frequency circulating currents (common in large motors), install insulated bearings or sleeves on the non-drive end of the motor shaft. For vertical pump motors, insulate the bearing carrier.
Problem: VFD-Induced Shaft Voltages and Circulating CurrentsWhen not properly mitigated, VFD-induced shaft voltages and circulating currents in large motors and generators, including
Low-voltage motors: 500 HP or greater Medium-voltage motors DC motors: 300 HP or greater
cause electrical damage in bearings, resulting in motor failure and downtime.
and insulate the shaft’s non-drive end
Insulated CarriersA quick and inexpensive solution to prevent VFD-driven currents from damaging vertical pump motors.
Documented tolerances Ground finish Inspected for radial and axial runout 50 Rockwell C hardness Electrical integrity tested: Standard 1 GΩ at 1033 V Can be applied to any OEM carrier Fast turnaround time
Insulated Carrier Service
Coated BearingsThese bearings are coated with insulation to protect against electrical current damage.
SKF Insocoat FAG Insutect NKE electrically insulated roller bearings Available from stock in sizes 6212 ~ 6332
EMQ-Insulated Sleeves
HYBRID CERAMIC BEARINGS
COATED BEARINGS
INSULATED CARRIERS
INSULATED SLEEVES
Insulated Carrier Service
Non conductive rolling element made of silicone nitride
Insulates the bearing against the passage of currents
Provides extended grease life
Lower operating temperatures
Available with shields and seals
Available from stock size range from 6203 thru 6332
These bearings have electrical insulating coatings to protect against damage caused by the passage of electrical currents.
Available from stock size range from 6212 thru 6332
SKF INSOCOAT INSUTECT
FAG INSUTECT
NKE Electrically Insulated Roller Bearings
Manufactured in SAE 1026 Steel
Coated with a Thermoplastic Polymer Alloy
Dielectric strength of 1,000 volts per mil.
Supplied with insulating washers made from G10 material.
Available from stock size range from 6202 thru 6240
• Documented Tolerances • Ground Finish • Carriers are inspected for radial & axial run out • 50 Rockwell C Hardness • Electrical Integrity Test Standard 1 GΩ at 1033V • This Technology Can Be Applied to Any OEM Carrier • Fast Turnaround Time
Manufactured in SAE 1026 steel Coated with thermoplastic polymer alloy Dielectric strength of 1000 V per mil. Supplied with insulating G10 epoxy glass washers Available from stock in sizes 6202 ~ 6240
EMQ-Insulated Sleeves
HYBRID CERAMIC BEARINGS
COATED BEARINGS
INSULATED CARRIERS
INSULATED SLEEVES
Insulated Carrier Service
Non conductive rolling element made of silicone nitride
Insulates the bearing against the passage of currents
Provides extended grease life
Lower operating temperatures
Available with shields and seals
Available from stock size range from 6203 thru 6332
These bearings have electrical insulating coatings to protect against damage caused by the passage of electrical currents.
Available from stock size range from 6212 thru 6332
SKF INSOCOAT INSUTECT
FAG INSUTECT
NKE Electrically Insulated Roller Bearings
Manufactured in SAE 1026 Steel
Coated with a Thermoplastic Polymer Alloy
Dielectric strength of 1,000 volts per mil.
Supplied with insulating washers made from G10 material.
Available from stock size range from 6202 thru 6240
• Documented Tolerances • Ground Finish • Carriers are inspected for radial & axial run out • 50 Rockwell C Hardness • Electrical Integrity Test Standard 1 GΩ at 1033V • This Technology Can Be Applied to Any OEM Carrier • Fast Turnaround Time
EMQ-Insulated Sleeves
HYBRID CERAMIC BEARINGS
COATED BEARINGS
INSULATED CARRIERS
INSULATED SLEEVES
Insulated Carrier Service
Non conductive rolling element made of silicone nitride
Insulates the bearing against the passage of currents
Provides extended grease life
Lower operating temperatures
Available with shields and seals
Available from stock size range from 6203 thru 6332
These bearings have electrical insulating coatings to protect against damage caused by the passage of electrical currents.
Available from stock size range from 6212 thru 6332
SKF INSOCOAT INSUTECT
FAG INSUTECT
NKE Electrically Insulated Roller Bearings
Manufactured in SAE 1026 Steel
Coated with a Thermoplastic Polymer Alloy
Dielectric strength of 1,000 volts per mil.
Supplied with insulating washers made from G10 material.
Available from stock size range from 6202 thru 6240
• Documented Tolerances • Ground Finish • Carriers are inspected for radial & axial run out • 50 Rockwell C Hardness • Electrical Integrity Test Standard 1 GΩ at 1033V • This Technology Can Be Applied to Any OEM Carrier • Fast Turnaround Time
Hybrid Ceramic BearingsUnique ceramic material insulates bearings against electrical currents, extends grease life, and reduces lifecycle costs.
Silicone nitride nonconductive rolling elements Insulate the bearing against damaging currents Extend grease life Reduce operating temperatures Available with shields and seals Available from stock in sizes 6203 ~ 6332
EMQ-Insulated Sleeves
HYBRID CERAMIC BEARINGS
COATED BEARINGS
INSULATED CARRIERS
INSULATED SLEEVES
Insulated Carrier Service
Non conductive rolling element made of silicone nitride
Insulates the bearing against the passage of currents
Provides extended grease life
Lower operating temperatures
Available with shields and seals
Available from stock size range from 6203 thru 6332
These bearings have electrical insulating coatings to protect against damage caused by the passage of electrical currents.
Available from stock size range from 6212 thru 6332
SKF INSOCOAT INSUTECT
FAG INSUTECT
NKE Electrically Insulated Roller Bearings
Manufactured in SAE 1026 Steel
Coated with a Thermoplastic Polymer Alloy
Dielectric strength of 1,000 volts per mil.
Supplied with insulating washers made from G10 material.
Available from stock size range from 6202 thru 6240
• Documented Tolerances • Ground Finish • Carriers are inspected for radial & axial run out • 50 Rockwell C Hardness • Electrical Integrity Test Standard 1 GΩ at 1033V • This Technology Can Be Applied to Any OEM Carrier • Fast Turnaround Time
EMQ-Insulated Sleeves
HYBRID CERAMIC BEARINGS
COATED BEARINGS
INSULATED CARRIERS
INSULATED SLEEVES
Insulated Carrier Service
Non conductive rolling element made of silicone nitride
Insulates the bearing against the passage of currents
Provides extended grease life
Lower operating temperatures
Available with shields and seals
Available from stock size range from 6203 thru 6332
These bearings have electrical insulating coatings to protect against damage caused by the passage of electrical currents.
Available from stock size range from 6212 thru 6332
SKF INSOCOAT INSUTECT
FAG INSUTECT
NKE Electrically Insulated Roller Bearings
Manufactured in SAE 1026 Steel
Coated with a Thermoplastic Polymer Alloy
Dielectric strength of 1,000 volts per mil.
Supplied with insulating washers made from G10 material.
Available from stock size range from 6202 thru 6240
• Documented Tolerances • Ground Finish • Carriers are inspected for radial & axial run out • 50 Rockwell C Hardness • Electrical Integrity Test Standard 1 GΩ at 1033V • This Technology Can Be Applied to Any OEM Carrier • Fast Turnaround Time
MRC®
Electrical discharge machining — pitting and frosting
Fluting damage to bearing race — a washboard pattern from electrical discharges
