GE GCY51F Series Instructions Manual

GEK-26437Zreiaytransf.seJngx 2Z(basicreachp-N)Transf.setting(Z)=Z(desired)x2Z(basicreacha-N)Knowingtherelayreachascalculatedanelectricaltestshouldbeperformedinordertodetermineifthetransformersettingiscorrect.1.Connecttherelayper Fig.14.2.Setthephaseanglemeterfor75degreeslag.3.Determinethecurrenttooperatetheunit fortheZsetting0-0oftherelaybyusingthe followingequations.Voltage@75°lag(+)1%Checkoneadditional pointtodetermineifthe angle ofmaximumtorqueiscorrectbycheckingapickup30degreesofftheangle ofmaximumtorque.=VoltageaPPli3g)@45°or105°lag(+)3%Refer to thesectiononSERVICINGifanyadjustmentsmustbemadetotherelay.Beforeanyadjustments aremadetotherelaywithatransformersettingotherthan100percent,thebasicunitmustbecheckedfirstforthebasicminimumtap used.RENEWALPARTSItisrecon1)erldedthatsufficientquantitiesofrenewalpartsbecarriedin5tock toenablethepromptreplacement ofanythatareworn,broken, ordamaged.Whenorderingrenewalparts,address thenearestSales Office oftheGeneralElectricCompany,specifyquantity required,nameofthepartwanted,andthecompletemodel numberoftherelay forwhichthepartisrequired.18