Siemens siprotec 7SD5 User Manual

2.22 Monitoring Functions
387
7SD5 Manual
C53000-G1176-C169-1
Table 2-16 Summary of malfunction responses of the device
Monitoring Possible causes Malfunction Re-
sponse
Indication (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
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
Buffer battery Internal (battery) Indication „Fail Battery“ (177) As allocated
Hardware watchdog Internal (processor failure) Device not in operation LED „ERROR“ DOK
2)
drops out
Software watchdog Internal (program execution) Restart attempt
1)
LED „ERROR“ DOK
2)
drops out
Main memory Internal (battery) Restart attempt
1)
,
Restart abort
Device not in operation
LED flashes DOK
2)
drops out
Program memory 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
Sampling frequency Internal (clock generator) Restart attempt
1)
LED „ERROR“ DOK
2)
drops out
1 A/5 A setting Jumper wrong 1/5 A Indications:
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 adjustm.“
(193)
As allocated
Earth current transform-
er sensitive/insensitivity
I/O-BG does not comply with
the order number (MLFB) of
the device
Indications:
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 order number (MLFB)
Indications:
Protection out of opera-
tion
„Error Board
BG1...7“ (183 ...
189)
and if applicable
„Error A/D-conv.“.
(181)
DOK
2)
drops out
Current sum Internal (measured value
acquisition)
Indication
Total blocking of the dif-
ferential protection
„Failure Σi“ (289) As allocated
Current balance External (power system or
current transformer)
Indication „Fail I balance“ (163) As allocated
Broken wire External (power system or
current transformer)
Indication
Phase-selective block-
ing of the differential
protection
„Broken Iwire L1“
(290), „Broken Iwire
L2“ (291), „Broken
Iwire L3“ (292)
As allocated
Voltage sum Internal (measured value
acquisition)
Indication „Fail Σ U Ph-E“ (165) As allocated
Voltage symmetry External (power system or
voltage transformer)
Indication „Fail U balance“
(167)
As allocated
Voltage phase se-
quence
External (power system or
connection)
Indication „Fail Ph. Seq.“ (171) As allocated
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English