Settings - Siemens SIPROTEC 7SJ62 Manual

Functions
2.13 Intermittent Ground Fault Protection
The reset time, after which the summation is reset in healthy operation and the protection resumes normal
status, is configured to T-reset at address 3305.
Figure 2-94
Address 3306 Nos.det. specifies the number of pickups after which a ground fault is considered intermittent.
2.13.3

Settings

The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec-
ondary nominal current of the current transformer.
Addr. Parameter
3301 INTERM.EF
3302 Iie>
3302 Iie>
3302 Iie>
3303 T-det.ext.
3304 T-sum det.
3305 T-reset
3306 Nos.det.
248
Example of selectivity criteria of the intermittent ground fault protection
C Setting Options
OFF
ON
1A 0.05 .. 35.00 A
5A 0.25 .. 175.00 A
1A 0.05 .. 35.00 A
5A 0.25 .. 175.00 A
0.005 .. 1.500 A
0.00 .. 10.00 sec
0.00 .. 100.00 sec
1 .. 600 sec
2 .. 10
Default Setting
OFF Intermittent earth fault pro-
tection
1.00 A Pick-up value of interm.
E/F stage
5.00 A
1.00 A Pick-up value of interm.
E/F stage
5.00 A
1.000 A Pick-up value of interm.
E/F stage
0.10 sec Detection extension time
20.00 sec Sum of detection times
300 sec Reset time
3 No. of det. for start of int.
E/F prot
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
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