Settings - Siemens 7SK80 Manual

Voltage Protection (Protection Operating Quantities)
In a three-phase connection, the fundamental harmonic of the largest of the three phase-to-phase voltages
(Vphph) or phase-Ground voltages (Vph-n) or the positive sequence voltage (V1) or the negative sequence
voltage (V2) is supplied to the overvoltage protection elements. In three-phase connection, undervoltage pro-
tection relies either on the positive sequence voltage (V1) or the smallest of the phase-to-phase voltages
(Vphph) or the phase-to-Ground voltages (Vph-n). This is configured by setting the parameter value in address
614 OP. QUANTITY 59 and 615 OP. QUANTITY 27.

2.1.3.3 Settings

Addresses which have an appended "A" can only be changed with DIGSI, under "Display Additional Settings".
The table indicates region-specific default settings. Column C (configuration) indicates the corresponding sec-
ondary nominal current of the current transformer.
Addr. Parameter
201 CT Starpoint
202 Vnom PRIMARY
203 Vnom SECONDARY
204 CT PRIMARY
205 CT SECONDARY
206A Vph / Vdelta
209 PHASE SEQ.
210A TMin TRIP CMD
212 BkrClosed I MIN
213 VT Connect. 3ph
214 Rated Frequency
217 Ignd-CT PRIM
218 Ignd-CT SEC
220 Threshold BI 1
221 Threshold BI 2
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
C Setting Options
towards Line
towards Busbar
0.10 .. 800.00 kV
34 .. 225 V
10 .. 50000 A
1A
5A
1.00 .. 3.00
A B C
A C B
0.01 .. 32.00 sec
1A 0.04 .. 1.00 A
5A 0.20 .. 5.00 A
Van, Vbn, Vcn
Vab, Vbc, VGnd
Vab, Vbc
Vab, Vbc, Vx
50 Hz
60 Hz
1 .. 50000 A
1A
5A
Thresh. BI 176V
Thresh. BI 88V
Thresh. BI 19V
Thresh. BI 176V
Thresh. BI 88V
Thresh. BI 19V
Default Setting
towards Line CT Starpoint
20.00 kV Rated Primary Voltage
100 V Rated Secondary Voltage
(L-L)
400 A CT Rated Primary Current
1A CT Rated Secondary
Current
1.73 Matching ratio Phase-VT
To Open-Delta-VT
A B C Phase Sequence
0.15 sec Minimum TRIP Command
Duration
0.04 A Closed Breaker Min.
Current Threshold
0.20 A
Van, Vbn, Vcn VT Connection, three-
phase
50 Hz Rated Frequency
60 A Ignd-CT rated primary
current
1A Ignd-CT rated secondary
current
Thresh. BI 176V Threshold for Binary Input
1
Thresh. BI 176V Threshold for Binary Input
2
Functions
2.1 General
Comments
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