Functions
2.7 Monitoring Function
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
141
Figure 2-52
Logic of the Positive Sequence System Phase Angle Monitoring
2.7.1.5
Malfunction Reaction
Depending which kind of self supervision function is picked up, an alarm is given, the processor is restarted or
the device is taken out of operation. If the fault is still present after three restart attempts, the device will take
itself out of service and indicate this condition by dropout of the “Device OK” relay, thus indicating device failure.
The red LED „ERROR“ on the device front lights up, provided the auxiliary voltage is available, and the green
LED „RUN“ goes off. If the internal auxiliary voltage supply fails, all LEDs are dark. Table 2-5 shows a summary
of the monitoring functions and the malfunction responses of the relay.
Table 2-5
Summary of Malfunction Responses of the Device
Monitoring
possible causes
Malfunction Re-
sponse
Message (F.No)
Device
AC/DC supply voltage
loss
External (aux. voltage) inter-
nal (converter)
Device out of operation
alarm, if possible
All LEDs dark
„Error 5V“ (144)
DOK
drops out
Measured Value Acqui-
sition
Internal (converter or refer-
ence voltage)
Protection out of opera-
tion, alarm
LED „ERROR“
„Error A/D-conv.“
(181)
DOK
drops out
Buffer battery
Internal (battery)
Message
„Fail Battery“ (177)
As allocated
Hardware Watchdog
Internal (processor failure)
Device not in operation LED „ERROR“
DOK
drops out
Software watchdog
Internal (program execution) Restart attempt
LED „ERROR“
DOK
drops out
Main memory
Internal (battery)
Restart attempt
,
Restart abort
Device not in operation
LED flashes
DOK
drops out
Program memory
Internal (EPROM)
Restart attempt
LED „ERROR“
DOK
drops out
Settings memory
internal (Flash-EPROM or
RAM)
Restart attempt
LED „ERROR“
DOK
drops out
Sampling frequency
Internal (clock generator)
Restart attempt
LED „ERROR“
DOK
drops out
Summary of Contents for Siprotec 7VK61
Page 8: ...Preface SIPROTEC 7VK61 Manual C53000 G1176 C159 3 Release date 05 2009 8 ...
Page 14: ...Contents SIPROTEC 7VK61 Manual C53000 G1176 C159 3 Release date 05 2009 14 ...
Page 316: ...Literature SIPROTEC 7VK61 Manual C53000 G1176 C159 3 Release date 05 2009 316 ...
Page 328: ...Glossary SIPROTEC 7VK61 Manual C53000 G1176 C159 3 Release date 05 2009 328 ...