Siemens SIPROTEC Manual page 433

Table 2-17 Summary of Malfunction Responses of the Device
Monitoring
Loss of aux. voltage
Measured value
acquisition
Buffer battery Internal (buffer battery)
Hardware watchdog
Software watchdog Internal (program sequence) Restart attempt
Main memory Internal (RAM)
Program memory
Parameter memory
Sampling frequency
1 A/5 A setting Jumper setting 1/5 A incorrect Indications:
Adjustment values Internal (EEPROM or RAM)
Earth current transform-
er sensitive/insensitive
Modules
Current sum
Current symmetry External (power system or
Broken wire External (power system or
Voltage sum
Voltage symmetry
Voltage phase
sequence
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
Possible Causes
External (aux. voltage)
internal (converter)
Internal (converter or refer-
ence voltage)
Internal (processor failure)
Internal (EPROM)
Internal
(flash EPROM or RAM)
Internal (master clock)
I/O module does not comply
with the order number (MLFB)
of the device
Module does not comply with
order number (MLFB).
Internal (measured value ac-
quisition)
current transformer)
current transformer)
Internal (measured value
acquisition)
External (power system or
voltage transformer)
External (power system or
connection)
Malfunction Re-
sponse
Device out of operation, all LEDs dark
alarm if necessary „Error 5V" (144)
Protection out of opera- LED „ERROR"
tion, indication „Error A/D-conv." (181)
Indication „Fail Battery" (177)
Device out of operation LED „ERROR"
1)
LED „ERROR"
1)
Restart attempt , abort LED flashes
restart
Device out of operation
1)
Restart attempt LED „ERROR"
1)
Restart attempt LED „ERROR"
1)
Restart attempt LED „ERROR"
„Error1A/5Awrong"
Protection out of opera- (192) „Error A/D-conv."
tion (181)
LED „ERROR"
Indication: „Alarm adjustm." (193)
using default values
Indications: „Error neutralCT"
Protection out of opera- (194)„Error A/D-conv."
tion (181)
LED „ERROR"
Indications: „Error board1...7" (No
Protection out of opera- 183 ... 189)
tion and if applicable
„Error A/D-conv.". (181)
Indication „Failure Σi" (289)
Total blocking of differ-
ential protection
Indication „Fail I balance" (163)
Indication „Broken Iwire L1" (290),
Phase-selective block- „Broken Iwire L2" (291),
ing of differential protec- „Broken Iwire L3" (292)
tion
Indication „Fail Σ U Ph-E" (165)
Indication „Fail U balance" (167)
Indication „Fail Ph. Seq." (171)
2.24 Monitoring Functions
Indication (No.) Output
DOK
out
DOK
out
As allocated
DOK
out
DOK
out
DOK
out
DOK
out
DOK
out
DOK
out
DOK
out
As allocated
DOK
out
DOK
out
As allocated
As allocated
As allocated
As allocated
As allocated
As allocated
Functions
2)
drops
2)
drops
2)
drops
2)
drops
2)
drops
2)
drops
2)
drops
2)
drops
2)
drops
2)
drops
2)
drops
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