GE G60 User Manual

9-12 G60 Generator Protection System GE Multilin
9.1 SETTING EXAMPLE 9 APPLICATION OF SETTINGS
9
9.1.14 FREQUENCY
The pickup and delay settings are dependent on operating practices and system characteristics. In this example, two over-
frequency and two underfrequency elements will be used. The elements will be blocked when offline. Underfrequency will
initiate a trip. Overfrequency will alarm only. Either source may be assigned.
Make the following changes in EnerVista UR Setup or through the
SETTINGS  CONTROL ELEMENTS  UNDERFRE-
QUENCY  UNDERFREQUENCY 1(2) and the SETTINGS  CONTROL ELEMENTS  OVERFREQUENCY  OVERFREQUENCY 1(2)
menus:
9.1.15 ACCIDENTAL ENERGIZATION
In this example, the
ACCDNT ENRG ARMING MODE is selected as “UV and Offline”. The ACCDNT ENRG OC PICKUP setting
should be set at ½ the minimum expected fault current. In this case, 1.0 pu (8000 A primary) is selected. In cases where it
is possible to re-energize the machine through its auxiliary transformer, a lower setting may be required. The undervoltage
pickup setting must be set above the maximum expected fault voltage.
Make the following changes in EnerVista UR Setup or through the
SETTINGS  GROUPED ELEMENTS  SETTING GROUP
1
 ACCIDENTAL ENERGIZATION menu:

GE G60 Specifications

General

Brand	GE
Model	G60
Category	Protection Device
Language	English