2 Functions
172
7SA522 Manual
C53000-G1176-C155-3
In applications on transformer feeders or lines that are terminated on transformers it
may be assumed that, if very large currents occur, a short circuit has occurred in front
of the transformer. In the event of such large currents, the inrush stabilization is inhib-
ited. This threshold value which is set in the address  ,PD[,QUXVK5HVW,
should be larger than the maximum expected inrush current (RMS value).
2.7.3 Settings
Addresses which have an appended "A" can only be changed with DIGSI, under Ad-
ditional Settings.
The table indicates region-specific presettings. Column C (configuration) indicates the
corresponding secondary nominal current of the current transformer.
Addr. Parameter C Setting Options Default Setting Comments
3101 FCT EarthFltO/C ON
OFF
ON Earth Fault overcurrent
function is
3102 BLOCK for Dist. every PICKUP
1phase PICKUP
multiph. PICKUP
NO
every PICKUP Block E/F for Distance pro-
tection
3103 BLOCK 1pDeadTim YES
NO
YES Block E/F for 1pole Dead
time
3104A Iph-STAB. Slope 0 .. 30 % 10 % Stabilisation Slope with
Iphase
3105 3IoMin Teleprot 1A 0.01 .. 1.00 A 0.50 A 3Io-Min threshold for Tele-
prot. schemes
5A 0.05 .. 5.00 A 2.50 A
3105 3IoMin Teleprot 1A 0.003 .. 1.000 A 0.500 A 3Io-Min threshold for Tele-
prot. schemes
5A 0.015 .. 5.000 A 2.500 A
3109 Trip 1pole E/F YES
NO
YES Single pole trip with earth
flt.prot.
3110 Op. mode 3I0>>> Forward
Reverse
Non-Directional
Inactive
Inactive Operating mode
3111 3I0>>> 1A 0.05 .. 25.00 A 4.00 A 3I0>>> Pickup
5A 0.25 .. 125.00 A 20.00 A
3112 T 3I0>>> 0.00 .. 30.00 sec; ∞ 0.30 sec T 3I0>>> Time delay
3113 3I0>>> Telep/BI NO
YES
NO Instantaneous trip via Tele-
prot./BI
3114 3I0>>>SOTF-Trip NO
YES
NO Instantaneous trip after
SwitchOnToFault
3115 3I0>>>InrushBlk NO
YES
NO Inrush Blocking
3120 Op. mode 3I0>> Forward
Reverse
Non-Directional
Inactive
Inactive Operating mode
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