Siemens siprotec 7SA522 User Manual

2.19 Monitoring function
321
7SA522 Manual
C53000-G1176-C155-3
2.19.1.4 Malfunction Responses
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
Monitoring Possible Causes Malfunction Re-
sponse
Alarm (FNo.) Output
Auxiliary Supply Voltage
Loss
External (aux. voltage) inter-
nal (converter)
Device out of operation
or alarm
All LEDs dark
“Error 5V” (144)
DOK
2)
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
2)
drops out
Battery Internal (battery) Message “Fail Battery” (177) as allocated
Hardware Watchdog Internal (processor failure) Device not in operation LED “ERROR” DOK
2)
drops out
Software Watchdog Internal (program sequence) Restart attempt
1)
LED “ERROR” DOK
2)
drops out
ROM Internal (RAM) Restart attempt
1)
),
Restart abort
Device not in operation
LED flashes DOK
2)
drops out
RAM Internal (EPROM) Restart attempt
1)
LED “ERROR” DOK
2)
drops out
Settings memory internal (Flash-EPROM or
RAM)
Restart attempt
1)
LED “ERROR” DOK
2)
drops out
Scanning frequency Internal (clock generator) Restart attempt
1)
LED “ERROR” DOK
2)
drops out
1 A/5 A setting 1/5 A jumper wrong Messages:
Protection out of opera-
tion
“Error1A/5Awrong”
(192) “Error A/D-
conv.” (181)
LED “ERROR”
DOK
2)
drops out
Calibration data Internal (EEPROM or RAM) Indication:
Using default values
“Alarm NO calibr”
(193)
As allocated
Earth current transform-
er sensitive/insensitive
I/O module does not corre-
spond to the order number
(MLFB) of the device.
Messages:
Protection out of opera-
tion
“Error neutralCT”
(194)“Error A/D-
conv.” (181)
LED “ERROR”
DOK
2)
drops out
Modules Module does not comply
with ordering number
(MLFB).
Messages:
Protection out of opera-
tion
“Error Board 1...7”
(FNo. 183 ... 189)
and if applicable
“Error A/D-conv.”.
(181)
DOK
2)
drops out
Current sum Internal (measured value
acquisition)
Message “Failure Σ I” (162) As allocated
Current symmetry External (power system or
current transformer)
Message “Fail I balance” (163) as allocated
Broken Conductor External (power system or
current transformer)
Message “Fail Conductor”
(195)
As allocated
Voltage sum internal (measured value ac-
quisition)
Message “Fail Σ U Ph-E” (165) As allocated

Siemens siprotec 7SA522 Specifications

General

Brand	Siemens
Model	siprotec 7SA522
Category	Protection Device
Language	English