Overexcitation; Inputs/Outputs - GE G30 Instruction Manual

SETTINGS CHAPTER 8: APPLICATION OF SETTINGS

8.2.8 Overexcitation

This protection is to be set to coordinate with the manufacturer's excitation capability curves. For the example system, the
combined generator/GSU limit curve is shown as follows.
Figure 8-5: Generator/GSU limit curve
Program the volts per hertz 1 element with an inverse characteristic (curve A), a pickup of 1.05, and a TDM of 40. Program
the volts per hertz 2 element with a definite time characteristic, a pickup of 1.23, and a time delay of 2 seconds. Both
elements are thus set to issue a trip. The volts per hertz 1 pickup is to be used to generate an alarm. Either source can be
assigned in this example. Make the following changes in the EnerVista software or the front panel
SETTINGS  GROUPED
menus.
ELEMENTS  SETTING GROUP 1  VOLTAGE ELEMENTS  VOLTS/HZ 1(2)
8

8.2.9 Inputs/outputs

The following inputs and outputs are used in this example. Make the following changes in the EnerVista software or the
front panel menus.
SETTINGS  INPUTS/OUTPUTS  CONTACT INPUTS  CONTACT INPUT H7a(H7c)
8-12 G30 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL