Output Status Indicators - GE 750 Instruction Manual

5 FRONT PANEL OPERATION 5.2 STATUS INDICATORS
RECLOSURE ENABLED (760 ONLY) : This indicator will be on continuously when autoreclosure is allowed to
operate as programmed. This is when the autoreclose function setpoint is enabled, and if used, the block reclo-
sure logic input is not asserted. Otherwise, this indicator will be off. Note that this indicator will always be in the
opposite state of the RECLOSURE DISABLED indicator.
RECLOSURE DISABLED (760 ONLY) : This indicator will be on continuously when autoreclosure is not
allowed to operate as programmed. This is when the autoreclose function setpoint is disabled, or if used, the
block reclosure logic input is asserted. Otherwise, this indicator will be off. Note that this indicator will always
be in the opposite state of the RECLOSURE ENABLED indicator.
RECLOSURE IN PROGRESS (760 ONLY) : If a trip initiates a reclosing sequence, this indicator will go on con-
tinuously during each of the programmed dead times.
RECLOSURE LOCKOUT (760 ONLY) : If the programmed reclose sequence has progressed to a final lockout
condition, this indicator will be on continuously. Lockout can be cleared by performing a reset.
LOCAL : This indicator turns on if the local mode function has been assigned a logic input which is asserted. In
local mode, the front panel and keys operate while the Remote Open and Remote Close logic
O P E N C L O S E
input functions will not operate. As well, the communication open and close commands have no effect.
MESSAGE : Under normal conditions, the default messages selected during setpoint programming are dis-
played. If any alarm or trip condition is generated, a diagnostic message overrides the displayed message and
this indicator flashes. If there is more than one condition present, can be used to scroll through the
N E X T
messages. Pressing any other key return to the normally displayed messages. While viewing normally dis-
played 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 . Note that diagnostic messages
N E X T
for alarms disappear with the condition while diagnostic messages for trips remain until cleared by a reset.
5

5.2.4 OUTPUT STATUS INDICATORS

The 750 and 760 have eight output relays. 1 TRIP, 2 CLOSE, and 8 SELF-TEST WARNING have fixed opera-
tion while 3-7 AUXILIARY are configurable. Regardless of the mode of operation, the corresponding front
panel indicator turns on while the output relay is signaling. If the non-operated state of an output relay is pro-
grammed as de-energized, the corresponding indicator will be on when the normally open contacts are closed.
If the non-operated state of an output relay is programmed as energized, the corresponding indicator will be on
when the normally open contacts are open.
1 TRIP : A trip sequence can be initiated by a protection element, a logic input element, a remote open com-
mand, a serial open command, or a front panel open command. When started, the 1 TRIP indicator turns on
briefly while the 1 TRIP relay is energized. After the auxiliary breaker contacts indicate that the breaker has
opened, the 1 TRIP relay and indicator stop operating. If both 52a and 52b auxiliary contacts are not installed,
the 1 TRIP relay and indicator will de-energize 100 ms after the trip condition clears, or after two seconds.
2 CLOSE : A close sequence can be initiated by a 760 reclosure or a remote, serial, or front panel close com-
mand. When started, the 2 CLOSE indicator turns on briefly while the 2 CLOSE relay energizes. After the aux-
iliary breaker contacts indicate that the breaker has closed, the 2 CLOSE relay and indicator stop operating. If
both 52a and 52b auxiliary contacts are not installed, the 2 CLOSE relay and indicator operate for 200 ms.
3-7 AUXILIARY : These relays are intended for customer specific requirements that can be initiated by any pro-
tection element or function whose RELAYS (3-7) setpoint has "3", "4", "5", "6", or "7" selected. The 3-7 AUXIL-
IARY indicators will turn on while the corresponding relays are operating.
8 SELF-TEST WARNING : During normal operation, this indicator is off with the fail-safe 8 SELF-TEST WARN-
ING relay energized. If any abnormal condition is detected during self monitoring (such as a hardware failure)
the indicator turns on and the relay de-energizes. If control power is lost or the relay is drawn out of its case,
the 8 SELF-TEST WARNING relay signals loss of protection by de-energizing, but the electronic LED indicator
remains off. Since there are no shorting contacts across the 8 SELF-TEST WARNING relay, both the normally
open and normally closed contacts are open when the relay is drawn out.
GE Power Management 750/760 Feeder Management Relay 5-
3
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