Siemens siprotec 7SA6, Manual

Page: 474 / 876

Functions
6-284
7SA6 Manual
C53000-G1176-C156-2
shown. In addition these monitoring alarms are allocated to four different general
alarm categories:
•
Error with a summary alarm
(F.No. 140, i.e. general device failure)
•
Alarm summary event
(F.No. 160, i.e. general supervision alarm)
•
Failure: general current supervision
(F.No. 161)
• Failure: general voltage supervision
(F.No. 164)
Table 6-13 Summary of the device response to detected failures
Monitoring Possible causes Failure response
General alarms
Alarm (function no.) Output
Auxiliary voltage failure external (aux. supply)
internal (converter) device out of service or
alarm all LEDs dark or
“
Error 5 V
” (144)
D.OK
2
) resets
Measured value
acquisition internal (converter or
reference voltage) protection out of serv-
ice, alarm LED „ERROR”
“
Error A/D-conv.
”
(181)
D.OK
2
) resets
Buffer battery internal (buffer battery) alarm
“Fail Battery” (177)
as allocated
Hardware–watchdog internal (processor fail) device out of service LED “ERROR” D.OK
2
) resets
Software–watchdog internal (program execu-
tion) reboot attempt
1
) LED “ERROR” D.OK
2
) resets
Working memory internal (RAM) reboot attempt
1
)
abortion of the boot
process
device out of service
LED flashes D.OK
2
) resets
Program memory internal (EPROM) reboot attempt
1
) LED “ERROR” D.OK
2
) resets
Parameter memory internal (EEPROM or
RAM) reboot attempt
1
) LED “ERROR” D.OK
2
) resets
Sampling frequency internal (clock) reboot attempt
1
) LED “ERROR” D.OK
2
) resets
1 A/5 A–setting jumper settings
1 A/5 A incorrect alarm
protection out of service “
Error1A/5Awrong
” (192)
“
Error A/D-conv.
” (181)
LED “ERROR”
D.OK
2
) resets
Calibration data internal (EEPROM or
RAM) alarm:
default values used “
Alarm NO calibr
”
(193)
as allocated
Earth current transformer
sensitive/normal I/O–module does not cor-
respond to the ordering
code of the device alarm:
protection out of service “
Error neutralCT
” (194)
“
Error A/D-conv.
” (181)
LED “ERROR”
D.OK
2
) resets
Modules module does not corre-
spond to the ordering
code of the device alarm:
protection out of service “
Error Board 1...7
”
(183 ... 189)
and if applicable
“
Error A/D-conv.
” (181)
D.OK
2
) resets
Current sum internal (measured value
acquisition) alarm
“Failure Σ I
” (162) as allocated
Current symmetry external (primary plant or
current transformers) alarm “
Fail I balance
”(163) as allocated
Broken conductor external (primary plant or
current transformers) alarm “
Fail Conductor
” (195) as allocated
1
) Following three unsuccessful reboot attempts, the device is taken out of service
2
) D.OK = “Device Okay” = Live contact relay