Insulated bearing has NOT stopping in 2018

Have you experienced bearing failure in electrical equipment? Do you know why insulation is needed in motor & generator?

OPEN IN WEB Insulated bearing has NOT stopping in 2018   Electric motors, generators and associated equipment are at risk when an electric current passes through their bearings. This can damage the contact surfaces of rolling elements and raceways in the bearings (electrical erosion) and rapidly degrade the grease. An additional risk in electric motors and generators comes from high frequency currents caused by the inherent stray capacitance. The risk of damage increases where the application uses a frequency converter. Thus here come INSULATED bearings, which usually means coated bearings, ceramic hybrid bearings or full ceramic bearings. Worldwide famous insulated bearing producers include SKF (INSOCOAT Bearing), NTN (MEGAOHM Bearing), FAG (J20A/B/C Bearing), NKE (SQ77/E Bearing) & etc. Here we take item 6226M/C3VL0241 for example: Basic technical data for reference: Coating Layer Thickness: 0.2-0.4mm Breakdown voltage: min 1000V Electrical resistance: min 50MΩ Insulated Material: Zirconia/ Alumina/ Titanium oxide Typical applications: Traction motors of railway vehicles/ Electric motors (AC/DC)/ Generators Different meanings of suffix in Worldwide brands: SKF INSOCOAT Bearing   VL0241:  >1000V DC,  >50MΩ, outer ring insulated VL2071:  >1000V DC,  >50MΩ, inner ring insulated VL0244:  >2000V DC,  >150MΩ, outer ring insulated VL2074:  >2000V DC,  >150MΩ, inner ring insulated VL0246:  >3000V DC,  >50MΩ, outer ring insulated VL2076:  >3000V DC,  >50MΩ, inner ring insulated   Know more FAG Insulated Bearing   J20C: insulation on the inner ring   6332-J20C-C3/ 6328-M-J20C-C3/ 6332M.C3.J20C J20C/ J20A/ J20AA/ J20B: insulation on the outer ring 6220-2RSR-J20AA-C3/ NU214-E-M1-F1-J20B-C4   Ceramic Hybrid Bearing: HC6214-M-P6-C3   Know more NKE Insulated Bearing   ​Insulation on the outer ring: SQ77 6330M/C3SQ77   6330-M-C3-SQ77 ​Insulation on the inner ring: SQ77E 6330M/C3SQ77E   6330-M-C3-SQ77E ​Hybrid Bearing: 6302SQ77B Know more Typical items in different applications: Wind turbine generators: 6326C3VL2071，6328C3VL2071，6330MC3VL2071，6332MC3VL2071 Electric motors: 6317MC3VL0241，6319MC3VL0241，6322MC3VL0241，NU330ECMC3VL0241 Traction motors of railway vehicles: 6016MC4VL0241，NU214MC4VL0241，6311MC4VL0241   Installation Notice: 1.     Installation: Insulated bearing is of high precision, wrong installation easily leads to bearing raceway damages. These bearings should be installed with help of special molds carefully. 2.     Prevention: Dynamic balance measurement for generators should be done before bearing installation in order to avoid iron fillings occurred during dynamic balance measurement running into the bearings.   If you have any needs of insulated bearings, just contact TBB Advanced Holiday Notice TBB office will be closed for annual Chinese New Year shutdown from Feb 14th to 25th 2018.  Please make a note.   UNSUBSCRIBE