9-4 G30 Generator Protection System GE Multilin9.1 SETTING EXAMPLE 9 APPLICATION OF SETTINGS9d) NO IN-ZONE TRANSFORMERConsider the generator protection system shown below, with no in-zone transformer:Figure 9–3: TYPICAL WIRING, NO IN-ZONE TRANSFORMERThe two sources are configured as follows:830747A1.CDRCONTACT INPUT H5aCONTACT INPUT H5cCONTACT INPUT H6aCONTACT INPUT H6cCOMMON H5bCONTACT INPUT H7aCONTACT INPUT H7cCONTACT INPUT H8aCONTACT INPUT H8cCOMMON H7bSURGEH6aH8aH5bH7bH8bH5aH7aH6cH8cH5cH7cH1aH2bH1cH1bH2cH2aH4aH4cH3bH3aH4bH3cH1H2H3H4DIGITAL INPUTS/OUTPUTS 6G IVIVIVIV8FF8cF8aF5aF5cF7cF6aF7aF6cVXVAVBVCVOLTAGE INPUTSVXVAVBVCF1cF4aF3cCURRENT INPUTSF2cF4cF1aF4bF1bF2aF3aF2bF3bIAIBICIGIA5IA1IB5IC5IG5IB1IC1IG1M3cM4cM4bM4aM1cM1aM1bM3bCURRENT INPUTS8HM2aM3aM2bM2cIAIBICIGIA5IA1IB5IC5IG5IB1IC1IG1“+”Inlet valve 52bTrip generator breakerTrip field breakerTrip turbineAlarmG30 Generator Management Relay“–”RABCX2X3H1H2H3X1X2X3H1H2H3X15213.2 : 25 kV153 MVAX = 0.1 pu13.8 kv, 162 MVAX΄ = 0.216 puX = 1.967 puI2T capability = 10I2 capability = 8%Motoring power = 10%
