Functional Description
3-5
Relay Setup And Configuration
Function setup and system configuration is organized in a menu format on the front panel display. In
order to scan through the current settings, the user must press the SELECT pushbutton. The user can
only perform changes to these settings while the program enable hardware jumper is installed. (Note:
The program enable hardware jumper is not required when using a personal computer to program relay
settings.) Although the menu shown in Figures 3-3 through 3-8, shows only forward progression through
the sequence, the user can adjust from this default at any of the function ON/OFF menus, by
simultaneously holding down the SELECT pushbutton and either the Raise or the Lower pushbutton for
forward and reverse progression, respectively. If a particular function that is shown is not available
because of relay selection, the display will automatically move on to the next available function in the
progression.
The first four user options are described in the following paragraphs and shown in Figure 3-3.
TRIP RESET - Determines whether or not the relay will automatically reset any trip condition whenever
the fault condition has cleared. The user can toggle this ON and OFF by pressing the Raise pushbutton.
Pressing the SELECT key saves the configuration in the nonvolatile memory and moves on to the next
selection display.
CT CURRENT Level - Selects either five amperes or one ampere for the current level. This is required so
that the relay applies the correct weighting to the internal currents to calculate neutral ground fault current,
reactive current, and reverse power levels. Pressing the Raise key toggles the option. Pressing the
SELECT key saves the setting in the nonvolatile memory and moves on to the next menu.
VOLTAGE PHASE - Selects how the relay will interpret the generator voltages. The three possibilities
are:
PHASE VOLTAGE = 1 Single-phase line-to-line in which the connection must be made between
the generators phase A and B terminals.
PHASE VOLTAGE = 3 Three-phase, three wire, line-to-line in which connections must be made
between the generators phase A, B, and C terminals.
PHASE VOLTAGE = 4 Three-phase, four wire, line-to-neutral in which connections must be made
between the generators phase A, B, C, and N terminals.
Repeatedly pressing the Raise pushbutton toggles the menu options from 1 to 3, 3 to 4, and 4 to 1. When
the LCD displays the preferred option, the user must press the SELECT key to save the settings in
nonvolatile memory and to step to the next user option.
OVER VOLTAGE TRIP and RESET - Adjusts the settings for the over voltage protective function. The
user can toggle this function ON and OFF by pressing the Raise pushbutton. Once the preferred choice
has been made, the user can press the SELECT pushbutton to save the selection and move ahead. If the
protective function is enabled, the user can adjust the trip level by one volt using the Raise and Lower
keys. A fast scroll feature is given and can be accessed by holding the Raise or Lower pushbutton for
one second for a step of ten volts. Once again, pressing the SELECT key saves the setting and moves to
the next selection screen. Here, the user may adjust the TIME DELAY in steps of one second, or, using
the fast scroll feature, in ten second steps. The SELECT pushbutton saves the configuration and moves
on to the next protective function.
All of the protective functions contain relatively the same menu format. The first screen allows for the
enabling or disabling of the function by toggling between ON and OFF, with the Raise pushbutton. The
user can reach the next screen and update the nonvolatile memory by pressing the SELECT pushbutton.
NOTE
The phase balance option is only available if the relay is user configured for three-phase
line-to-line or three-phase line-to-neutral generator voltage sensing.
The following Figures 3-3 through 3-8 are applicable for both NGF and TOC. A small
section of the menu shown in Figure 3-6 shows the menu specific for the NGF version.
The TOC version is similar.
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