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9-10 G60 Generator Protection System GE Multilin

9.1 SETTING EXAMPLE 9 APPLICATION OF SETTINGS

9.1.12 OVEREXCITATION

This protection should be set to coordinate with the manufacturers excitation capability curves. For example system, the

combined generator/GSU limit curve is shown:

Figure 9–4: 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 ele-

ments will issue a trip. The volts per hertz 1 pickup will be used to generate an alarm. Either source may be assigned in this

example. Make the following changes in EnerVista UR Setup or through the

SETTINGS  GROUPED ELEMENTS  SET-

TING GROUP 1  VOLTAGE ELEMENTS  VOLTS/HZ 1(2) menus:

Volts per hertz (p.u.)

Combined generator/GSU

limit curve

Volts per

hertz 1

Volts per

hertz 2

Time (seconds)

830734A1.CDR

GE G60 User Manual

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