8.13
Date Code 20170814
Instruction Manual
SEL-700G Relay
Front-Panel Operations
Operation and Target LEDs
the time of the trip. At this point, the LED will latch in and can be reset using
the TARGET RESET pushbutton or the TAR R command as long as the target
conditions are absent. For a concise listing of the default programming on the
front-panel LEDs, see Table 4.89.
The SEL-700G comes with slide-in labels for custom LED designations that
match custom LED logic. The Configurable Label Kit includes blank labels,
word processor templates, and instructions.
The
ENABLED
LED indicates that the relay is powered correctly, is functional,
and has no self-test failures. Trip events illuminate the
TRIP
LED. The
prominent location of the
TRIP
LED in the top target area aids in recognizing
trip events quickly.
The
TRIP
LED has an additional function that notifies you of warning
conditions. When the
TRIP
LED is flashing, the warning conditions in
Table 8.3 are active when you set the corresponding relay element. For Relay
Word bit definitions, see Appendix J: Relay Word Bits.
TARGET RESET
Pushbutton
Target Reset
For a trip event, the SEL-700G latches the trip-involved target LEDs except
for the
ENABLED
LED. Press the
TARGET RESET
pushbutton to reset the latched
target LEDs. When a new trip event occurs and the previously latched trip
targets have not been reset, the relay clears the latched targets and displays the
new trip targets. Pressing and holding the
TARGET RESET
pushbutton illuminates
all the LEDs. Upon release of the
TARGET RESET
pushbutton, two possible trip
situations can exist: the conditions that caused the relay to trip have cleared, or
the trip conditions remain present at the relay inputs. If the trip conditions
have cleared, the latched target LEDs turn off. If the trip event conditions
Table 8.3
Possible Warning Conditions (Flashing TRIP LED)
Warning Message
Relay Word Bit Logic Condition
Gen Overload Alarm
49A
Gen Neg Seq Curr Alarm
46Q1T
Gen V/Hz Alarm
24D1T
Diff Cur/Open CT Alarm
87AT
Current Demand Alarm
PHDEMX OR 3I2DEMX OR GNDEMX OR
PHDEMY OR 3I2DEMY OR GNDEMY
Breaker Wear Alarm
BCWX OR BCWY
Autosynchronism Failed-Lockout
VSYNCNO OR FSYNCNO
RTD Warning
WDGALRM OR BRGALRM OR AMBALRM OR
OTHALRM
RTD Failure
RTDFLT
SEL-2664 FGM Failure
64FFLT
Comm. Loss Warning
COMMLOSS
Comm. Idle Warning
COMMIDLE
Содержание SEL-700G Series
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