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4.3 KEYPAD
4 FRONT PANEL OPERATION
4.3.7 NUMBER KEYS
Number keys are used for direct entry of numeric setpoint values. Thus, enter 27.3 as 2, 7, ., 3. Each key tog-
gles the display between the corresponding number and a hyphen.
4.3.8 HELP KEY
Press
to display a sequence of context-sensitive help messages that automatically advance every few
H E LP
seconds. After the last message is displayed, the screen returns to the originally displayed message. Press
during the sequence to immediately display the next message. Any other key returns to the normally
H E LP
displayed message.
4.3.9 RESET KEY
This key is operational when the 745 is in local mode. In local mode,
puts all latched relays to the non-
R ES E T
operated state and clears latched targets if initiating conditions are no longer present.
4
4.3.10 NEXT KEY
If a target becomes active, a diagnostic message overrides the displayed message and the MESSAGE indica-
tor flashes. If there is more than one target active,
scrolls through the messages. Pressing any other key
N EXT
returns to the normally displayed messages. While viewing the normally displayed messages, the MESSAGE
indicator continues to flash if any diagnostic message is active. To return to the diagnostic messages from the
normally displayed messages, press the
key.
N EXT
Note that diagnostic messages for self-resetting targets disappear with the condition, but diagnostic messages
for latched targets remain until they are cleared. When no targets are active,
illuminates all front panel
N EXT
indicators for approximately 5 seconds.
4-6
745 Transformer Management Relay
GE Power Management
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