GE DGP Series, Instruction Manual

Page: 41 / 278

GE Power Management DGP Digital Generator Protection System 2-
1
2 CALCULATION OF SETTINGS 2.1 GENERAL
2
2 CALCULATION OF SETTINGS 2.1 GENERAL 2.1.1 DESCRIPTION
This section provides information to assist the user in determining settings for the DGP™ generator protection
system. Some settings are determined by the size and type of generator and the system to which it is con-
nected, while other settings are the same regardless of the machine and/or system. Other settings may be set
according to user preference.
Settings that are independent of system and machine size/type will be presented first, followed by machine
and system-dependent settings. A blank setting form is provided (see Table 2–5: DGP***AAA SETTINGS
TABLE on page 2–41) and may be used to record model number, PROM version number, and settings for spe-
cific applications.
Table 2–1: DGP SYSTEM SETTINGS & RATINGS on page 2–3 lists all the settings and the corresponding
ranges and units. The column labeled DEFAULT indicates the DGP system settings stored in memory when
shipped from the factory. The settings described in the subsequent sections are arranged by category, corre-
sponding to the category headings on the light-emitting diode (LED) display of the local man-machine interface
(MMI). Individual settings and category headings are listed by the descriptive name followed by its mnemonic.
The DGP displays the mnemonic to identify a particular setting or category-of-setting heading.
In the following section, a set of example settings based on a typical generator system is presented. By no
means does this presentation encompass all possible setting scenarios or calculations. It is provided as a
demonstration for the setting methods and procedures to follow.
A sample generator system diagram is shown on the following page; it will be used to demonstrate the exam-
ple settings for a typical DGP protection system.