8-14 G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUALSETTINGS CHAPTER 8: APPLICATION OF SETTINGS8Make the following changes in the EnerVista software or the front panel SETTINGS CONTROL ELEMENTS UNDERFREQUENCY UNDERFREQUENCY 1(2) and SETTINGS CONTROL ELEMENTS OVERFREQUENCY OVERFREQUENCY1(2) menus.8.2.11 Accidental energizationIn this example, the ACCDNT ENRG ARMING MODE is selected as “UV and Offline.” The ACCDNT ENRG OC PICKUP setting is to beset at half the minimum expected fault current, and in this case 1.0 pu (8000 A primary) is selected. In cases where it ispossible to re-energize the machine through its auxiliary transformer, a lower setting can be required. The undervoltagepickup setting must be set above the maximum expected fault voltage; 0.700 pu is used here.Make the following changes in the EnerVista software or the front panel SETTING S GROUPED ELEMENTS SETTINGGROUP 1 ACCIDENTAL ENERGIZATION menu.8.2.12 FlexLogicThe following logic as given as an example. The logic for each specific application depends on system design, protectionphilosophies, and operating practices.
