User Manual

4-2 Maintenance
1502-UM051E-EN-P – June 2013
Routine Maintenance (cont.) Main Contact Inspection
 • Visuallyinspectthewearofthemaincontactswiththecontactorenergized.
When any part of the wear indicator line, located on the front side of the
hexsha,movesupintothebearing,replaceallthreevacuumbottles.(Re-
fertoFigure4.11)Undernormalconditions,thiswillnotbenecessaryuntil
thecontactorhasgonebeyondthe250,000ratedlife(100,000formechani-
callatchcontactors).
HiPot Test(RefertoChapter2)
 • Checkthevacuumbottleintegrity.
 • Checktheinsulationresistance.
Lubrication
Note:Lubricationofthecontactorisnotnecessary.Donotgreasethearmature
shaplasticbearings,northevacuumbottleplasticbearings.
e grease will dry out and impede the free motion of the contactor.
Mechanical Latch Roller Replacement
 • erolleronthemechanicallatchmechanismmustbereplacedevery
50,000operations.SeeMechanicalLatchRollerReplacementProcedure
(refertopage4-17).
Highvoltagemaybepresent,whichcanresultinsevere
injuryordeath.Itissuggestedthata“HotStick”beusedto
ensurethattheequipmentisdead.Lock-outanyincoming
power and disconnect the control plug from the contactor
beforeworkingonthisequipment
Before performing any maintenance on the contactor that is
installedinsideastarterconguration,forsafety,besureto
followallproceduresnotedintheappropriateUserManual
for complete instructions on accessing the power cell com-
partment.
S H O C K H A Z A R D
A T T E N T I O N