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3 HARDWARE DESCRIPTION
3.4 INSTALLATION
Immediately upon receipt, the equipment should be unpacked and examined for any damage sustained in tran-
sit. If damage resulting from rough handling is evident, file a damage claim at once with the transportation com-
pany and promptly notify the nearest GE Power Management Sales Office. If the equipment is not to be
installed immediately, it should be stored indoors in a location that is dry and protected from dust, metallic
chips, and severe atmospheric conditions.
The location should be clean and dry, free from dust and excessive vibration, and well lighted to facilitate
inspection and testing.
The DGP case has been designed for standard rack mounting. The case measures eight rack units (8 RU) in
height. Refer to Figure 3–1: DGP OUTLINE DRAWING on page 3–2 for the outline and mounting dimensions.
External connections are made according to the elementary diagrams in Section 1.5: ELEMENTARY DIA-
GRAMS on page 1–23. These are general diagrams incorporating all of the available options. Connection
need not be made to those terminals associated with options that will not be used.
The DGP system should be disabled to prevent tripping of the of the circuit breakers until it
has been determined that the unit is properly connected. This can be accomplished in two
ways: one is to de-energize the trip circuit connected to the relay; the other is to disable the
CAUTION
DGP outputs by setting the DISABLE OUTPUTS function to YES prior to installation.
An overall check of current transformer polarities, potential transformer polarities, and connections to the DGP
can be made prior to placing the system in service by using the system voltages and load current while moni-
toring the display for Present Values. Obtaining the DGP present values can be done in two ways.
1. Access the INF category through the keypad. Once the INF category is chosen use the [↑] key to select the
PRESENT VALUES menu item. Scrolling through the present values will allow you to determine if the
relay is wired correctly.
2. Press the [CLR] key and allow the DGP to automatically scroll through the present values.
Terminal BH14 must be tied to station ground, as shown in the elementary diagrams in Sec-
tion 1.5 ELEMENTARY DIAGRAMS on page 1–23. The connection to the ground bus must be
made as short as possible, preferably 10 inches or less, using #12 wire or larger.
CAUTION
GE Power Management
DGP Digital Generator Protection System
3.4 INSTALLATION
3.4.1 RECEIVING, HANDLING, & STORAGE
3.4.2 ENVIRONMENT
3.4.4 EXTERNAL CONNECTIONS
3.4.5 EXTERNAL CONNECTIONS TEST
3.4.6 SURGE GROUND CONNECTIONS
3
3.4.3 MOUNTING
3-
7
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