Malfunction Responses - Siemens SIPROTEC 7SA522 Manual

2.19.1.4 Malfunction Responses

Monitoring
Auxiliary Supply Voltage
Loss
Measured Value Acqui-
sition
Battery
Hardware Watchdog
Software Watchdog
ROM
RAM
Settings memory
Scanning frequency
1 A/5 A setting
Calibration data
Earth current transform-
er sensitive/insensitive
Modules
Current sum
Current symmetry
Broken Conductor
Voltage sum
7SA522 Manual
C53000-G1176-C155-3
Depending on the type of malfunction detected, an indication is sent, a restart of the
processor system initiated, or the device is taken out of service. After three unsuccess-
ful restart attempts, the device is also taken out of service. The operational readiness
NC contact ("life contact") operates to indicate the device is malfunctioning. The red
"ERROR" LED on the device front lights up, provided that there is an internal auxiliary
voltage, and the green "RUN" LED goes off. If the internal auxiliary voltage fails, then
all LEDs are dark. Table 2-10 shows a summary of the monitoring functions and the
malfunction responses of the relay.
Table 2-10 Summary of Malfunction Responses by the Protection Relay
Possible Causes
External (aux. voltage) inter-
nal (converter)
Internal (converter or refer-
ence voltage)
Internal (battery)
Internal (processor failure)
Internal (program sequence) Restart attempt
Internal (RAM)
Internal (EPROM)
internal (Flash-EPROM or
RAM)
Internal (clock generator)
1/5 A jumper wrong
Internal (EEPROM or RAM) Indication:
I/O module does not corre-
spond to the order number
(MLFB) of the device.
Module does not comply
with ordering number
(MLFB).
Internal (measured value
acquisition)
External (power system or
current transformer)
External (power system or
current transformer)
internal (measured value ac-
quisition)
Malfunction Re-
sponse
Device out of operation All LEDs dark
or alarm "Error 5V" (144)
Protection out of opera- LED "ERROR"
tion, alarm "Error A/D-conv."
(181)
Message "Fail Battery" (177)
Device not in operation LED "ERROR"
1)
LED "ERROR"
1)
Restart attempt ), LED flashes
Restart abort
Device not in operation
1)
Restart attempt LED "ERROR"
1)
Restart attempt LED "ERROR"
1)
Restart attempt LED "ERROR"
Messages: "Error1A/5Awrong"
Protection out of opera- (192) "Error A/D-
tion conv." (181)
LED "ERROR"
"Alarm NO calibr"
Using default values (193)
Messages: "Error neutralCT"
Protection out of opera- (194)"Error A/D-
tion conv." (181)
LED "ERROR"
Messages: "Error Board 1...7"
Protection out of opera- (FNo. 183 ... 189)
tion and if applicable
"Error A/D-conv.".
(181)
"Failure Σ I" (162)
Message
Message "Fail I balance" (163) as allocated
Message "Fail Conductor"
(195)
"Fail Σ U Ph-E" (165) As allocated
Message
2.19 Monitoring function
Alarm (FNo.) Output
2)
DOK drops out
2)
DOK drops out
as allocated
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
2)
DOK drops out
As allocated
2)
DOK drops out
2)
DOK drops out
As allocated
As allocated
321