TITLE

Preventing Damage to Motor Bearings

AUTHOR(S)
Oh, William
PUB. DATE
April 2007
SOURCE
Heating/Piping/Air Conditioning Engineering;Apr2007, Vol. 79 Issue 4, p46
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
The article presents a guideline on preventing electrical destruction to motor bearings of variable frequency drives (VFD). The shaft current induced into the drives must be diverted from the bearings by insulation or an alternate path to ground. Insulating material, usually a nonconductive resin or ceramic layer, isolates bearings and prevents shaft current from discharging. Conductive grease can also be applied to bearings, which provides a lower-impedance path.
ACCESSION #
25080155

 

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