Settings - Siemens siprotec 7SD5 User Manual

block is to be activated is set under address 2310 CROSSB 2HM. With the setting ∞
the crossblock function is always active until the second harmonic content in all
phases has dropped below the set value.
2.3.3

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
1201 STATE OF DIFF.
1210 I-DIFF>
1213 I-DIF>SWITCH ON
1217A T-DELAY I-DIFF>
1218 T3I0 1PHAS
1221 Ic-comp.
1224 IcSTAB/IcN
1233 I-DIFF>>
2301 INRUSH REST.
2302 2nd HARMONIC
2303 CROSS BLOCK
2305 MAX INRUSH PEAK
2310 CROSSB 2HM
7SD5 Manual
C53000-G1176-C169-1
C Setting Options
OFF
ON
1A 0.10 .. 20.00 A
5A 0.50 .. 100.00 A
1A 0.10 .. 20.00 A
5A 0.50 .. 100.00 A
0.00 .. 60.00 sec; ∞
0.00 .. 0.50 sec; ∞
OFF
ON
2.0 .. 4.0
0.8 .. 100.0 A; ∞
1A
4.0 .. 500.0 A; ∞
5A
OFF
ON
10 .. 45 %
NO
YES
1A 1.1 .. 25.0 A
5A 5.5 .. 125.0 A
0.00 .. 60.00 sec; ∞
2.3 Differential Protection
Default Setting
ON State of differential protec-
tion
0.30 A I-DIFF>: Pickup value
1.50 A
0.30 A I-DIFF>: Value under
switch on condition
1.50 A
0.00 sec I-DIFF>: Trip time delay
0.04 sec Delay 1ph-faults
(comp/isol. star-point)
OFF Charging current compen-
sation
2.5 Ic Stabilising / Ic Nominal
1.2 A I-DIFF>>: Pickup value
6.0 A
OFF Inrush Restraint
15 % 2nd. harmonic in % of fun-
damental
NO Cross Block
15.0 A Maximum inrush-peak
value
75.0 A
0.00 sec Time for Crossblock with
2nd harmonic
Comments
103