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Functions
2.11 Monitoring Functions
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
217
Table 2-14
Summary of malfunction responses by the protection relay
Monitoring
Possible Cause
Malfunction Re-
sponse
Message (No.)
Output
AC/DC supply voltage loss
External
(Nominal voltage) in-
ternal (power supply)
Device shutdown
All LEDs dark
DOK
drops out
Internal supply voltages
Internal (power
supply)
Device shutdown
LED "ERROR"
DOK
drops out
Buffer battery
Internal (buffer bat-
tery)
Message
„Fail Battery“ (177)
Hardware watchdog
Internal
(processor failure)
Device shutdown
LED "ERROR"
DOK
drops out
Software watchdog
Internal
(processor failure)
Restart attempt
LED "ERROR"
DOK
drops out
Working memory ROM
Internal (hardware)
Relay aborts restart,
device shutdown
LED blinks
DOK
drops out
Program memory RAM
Internal (hardware)
During boot sequence
LED "ERROR"
DOK
drops out
Detection during oper-
ation: Restart attempt
LED "ERROR"
Settings memory
Internal (hardware)
Restart attempt
LED "ERROR"
DOK
drops out
Sampling frequency
Internal (hardware)
Device shutdown
LED "ERROR"
DOK
drops out
Measured value acquisition
External (hardware)
Blocking by the protec-
tion function
„Error A/D-conv.“ (181),
LED "ERROR"
DOK
drops out
Error in the I/O-board
Internal (hardware)
Device shutdown
„I/O-Board error“ (178),
LED "ERROR"
DOK
drops out
Module error
Internal (hardware)
Device shutdown
„Error Board 1“ to „Error
Board 7“ (178 to 189),
LED "ERROR"
DOK
drops out
Internal auxiliary voltage 5 V
Internal (hardware)
Device shutdown
„Error 5V“ (144),
LED "ERROR"
DOK
drops out
0V monitoring
Internal (hardware)
Device shutdown
„Error 0V“ (145),
LED "ERROR"
DOK
drops out
Internal auxiliary voltage –5 V Internal (hardware)
Device shutdown
„Error -5V“ (146),
LED "ERROR"
DOK
drops out
Offset monitoring
Internal (hardware)
Device shutdown
„Error Offset“ (191)
DOK
drops out
Internal supply voltages
Internal (hardware)
Device shutdown
„Error PwrSupply“
(147),
LED "ERROR"
DOK
drops out
Current sum
Internal
(measured value ac-
quisition)
Device shutdown
„Failure
Σ
I“ (162)
DOK
drops out
Current symmetry
External (power
system or current
transformer)
Message
„Fail I balance“ (163)
As allocated
Voltage symmetry
External (power
system or voltage
transformer)
Message
„Fail V balance“ (167)
As allocated
Voltage phase sequence
External (power
system or connection)
Message
„Fail Ph. Seq. V“ 176)
As allocated
Current phase sequence
External (power
system or connection)
Message
„Fail Ph. Seq. I“ (175)
As allocated
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