Functions
2.13 Intermittent Ground Fault Protection
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
248
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 Example of selectivity criteria of the intermittent ground fault protection
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 C Setting Options Default Setting Comments
3301 INTERM.EF OFF
ON
OFF Intermittent earth fault pro-
tection
3302 Iie> 1A 0.05 .. 35.00 A 1.00 A Pick-up value of interm.
E/F stage
5A 0.25 .. 175.00 A 5.00 A
3302 Iie> 1A 0.05 .. 35.00 A 1.00 A Pick-up value of interm.
E/F stage
5A 0.25 .. 175.00 A 5.00 A
3302 Iie> 0.005 .. 1.500 A 1.000 A Pick-up value of interm.
E/F stage
3303 T-det.ext. 0.00 .. 10.00 sec 0.10 sec Detection extension time
3304 T-sum det. 0.00 .. 100.00 sec 20.00 sec Sum of detection times
3305 T-reset 1 .. 600 sec 300 sec Reset time
3306 Nos.det. 2 .. 10 3 No. of det. for start of int.
E/F prot
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