Siemens GMI Series Instruction

Also see for 15-GMI-1000: Installation operation & maintenance

Maintenance&OverhaultPage24FastenerCheckInspectallfastenersfor tightness.Bothlock-nutsandretain-ingringsare used.Replaceanyfastenersthatappeartohavebeen frequentlyremovedand replaced.Manual Spring and Contact ErosionChecksPerformtheManualSpringCheckcontainedinthesectiondescribingtheInstallation Checkand InitialFunctionalTests.Thekey stepsofthisprocedureare repeatedhere.1.Insertthe handcharginglever intothemanualchargehandle socket atthefrontoftheoperatorcontrol panel.Figure45shows theleverinserted.Upanddownmo-tionofthelevercharges the closingsprings.ContinuecrankinguntiltheChargedflag appears inthewindowofthe spring indicator.endoftripping springisconnected to thejackshaftbya pullrod.Thedashpotis connectedtothejackshaftoperatingshaftbyapushrodlinkage.Cleantheentirestored energyoperatormechanismwith adry,lint-free cloth.Checkallcomponentsforevidenceofexcessivewear.Place special attentionupon theclosingspringcranksandthevariouspushrods andlinkages.Figure44. Front ViewofOperatorMechanism.Lubricate all non-electricalmovingorslidingsurfaceswitha lightcoatofmachine oil containing a rustinhibitor.Bearings and Sliding SurfacesUseBeacon 325or equivalentPivotsandArticulated JointsUse Tectyl 910 or SAENo.10 motoroil with rust inhibitors.Donot lubricatethe piston ofthe dashpot assembly.Figure 45.Manual Charging of Closing Springs.2.PresstheClose(green)pushbutton.Thecontactpositionindicatoron theoperatorcontrol panelshould indicatethat the breakercontactsareclosed.3. Perform thecontacterosion check.Contact erosion oc-curswhen highfaultcurrentsare interrupted or when thevacuum interrupter isnearingitscontactlife.Determina-<