GE GCY51F Series Instructions Manual

GEK-26437Thebasicminimumreachcanhrextendeduptothemaximumohmic0—Hreachbyreducingtheuri’crestrainttransformer.Thiscanbeaccomplishedbyapplyingthe followingequation.Transf.setting ()1P---)_Xba4’“niumrechtap.Z—NZ0-N=desiredreachBasiciciminmumreachtap=selectthehighestreach tapbelowtheZ0-Nsettingdesired.M1andN2_OffsetTheM1unithasareverseoffset,wheretheforward reach of theunit ismaintainedandtheinsertirnofanoffsetincreasesthediameterof thecharacteristicsothatitextendsinareversedirection,providinganoffsetequaltotheoffsettapselected(+)10percent.TheM2unithasaforwardoffset,wherethediameteroftheunitscharacteristicismovedforward alongtheunit’sangleofmaximumtorque,equaltotheoffsettap(+)10percent.andM2TapLocations12PCY51F1ATheN1unitreach tapsarelocatedontwotapplatesandblocklocatedto therightoftheMlunit(lowerunit).Thebasicminimumreachtaps aremarkedontheplate.Thetapsareselectedbytwoinsulatedtapscrewsandshouldbesetidenticallyforaparticularreachsetting.TheM1offsettapis locatedattherearof therelaybehindtheM2unit(upperunit).Theoffsetisafixedvalueandisselectedbyalinkinan‘In”orOut’consideration.TheN1unitrestrainttransformer is locatedontheleftsideoftherelay frontview.Ithastaps inonepercent dnd10percentstepswhichareselectedwithtwoinsulatedtap plugsand movablejumperleads.TheN2unitreachtaps arelocatedbehindtherelayonaBakelitetap block,usinglinkstoobtainthebasicminimumreach.Bothsetsoflinksmustbesetidenticallyforanybasicreachdesired.TableHIindicatestheconnectionsforthebasicminimumreachsetting.TABLEIIIRELAYBASICMINIMUM A”“B”MODELREACH0-NLINKS LINKS1Ohm10GCY51F1A2Ohms023Ohms125Ohms50GCY51F2A 10 Ohms010l5Ohms5j10TheM2unitoffset is locatedatthefrontof therelayjustabovetheN2unit.Theoffsettaps aremarked--0,1, 2, 3,4ohmsandareselectedbyaslidingleadandcapturedscrew.TheN2restrainttransformer is locatedontherightsideoftherelay frontview.It consistsofatablock withtaps rangingin onepercent stepsandin tenpercent steps.Thetansarr selectedwithtwoinsulatedtap pluqsand movable jumperleads.12GCYB1F2AThelocation of unitsand components of the12GCY51F2Ais thesameas inthe12GCY51Firelay,exceptthatitis used withone amperecurrent transformers,withthDhmicrange equai to fivetimes the12GCYS1F1Arelay.