Fault Events - Block 82 - Siemens SIPROTEC 7SD600 System Manual

6
Operating instructions
Numerical line differential protection SIPROTEC 7SD600 V3.0
6.4.3

Fault events - Block 82

The events of the last 8 system disturbances can be
read out. These are located in the sub-level of block
82 in order from most to least recent. When a ninth
fault occurs the data of the least recent fault are era
sed. Each of the eight fault buffers can hold up to 30
single indications. If more indications occur, the 30th
indication will alarm that a buffer overflow has occu
red.
It is not necessary to enter a code word.
The INDICATION block can be reached from the initial
position when the device is in service by pressing the
B key twice. With the " key the next operating level
can be reached where block 82 can be accessed with
the B key. The last fault indication is reached by
changing to the sub-level with the " key. With the
B you can scroll to the less recent indications in this
level.
A
8 2 S F
B
E V E N T
8 2 1 . S F
E V E N T
The buffer section shown in the display is selected
line by line with the arrow keys B and Y:
B
0 3 . 1 1 . 9 5
B
2 2 : 0 9 : 4 6
Y Y Y
Y
. 8 1 0 m s
B
F a u l t
B B
6 - 22
System manual Order no. E50417-G1176-C069-A1
A system disturbance is defined such that a primary
system fault is treated as a single system disturbance
up to its ultimate clearance. Several faults may occur
within a system disturbance (from the first fault de
tection of a protective function until drop off of the
last fault detection).
If the date and time of the device have not yet been
set (see also section 6.3.1.2), the date 01.01.99 ap
pears, the time that appears is a relative time since
the last start of the system processor. This is follo
wed by the fault events in chronological order of their
detection with a relative time referring to the time the
fault began.
All available fault events are specified below. Of
course only the relevant events appear in the display
in the case at hand.
First, a few typical examples of fault events of a sy
stem disturbance with explanations of the display li
nes are shown.
[5200]
Start of the block "Fault events"
"
[5210]
Start of the block "last fault events"
"
[5211]
1st line: Date of last fault
2nd line: Time of the last fault
(hours, minutes, seconds
and in ms)
Fault with coming tag
Siemens AG January 1999