Settings - Siemens 7SC80 Manual

•
Phase-selectively with the fundamental harmonic of the individual phase-to-phase voltages (Vphph
selective)
•
Phase-selectively with the fundamental harmonic of the individual phase-to-ground voltages (Vph-n
selective)
In a 3-phase connection, undervoltage protection optionally uses the following quantities:
•
Fundamental harmonic of the smallest of the phase-to-phase voltages (Vphph)
•
Fundamental harmonic of the smallest of the phase-to-ground voltages (Vph-n)
•
Positive sequence voltage(V1)
•
Phase-selectively with the fundamental harmonic of the individual phase-to-phase voltages (Vphph
selective)
•
Phase-selectively with the fundamental harmonic of the individual phase-to-ground voltages (Vph-n
selective)
NOTE
i
i
If parameter 213 VT Connect. 3ph is set to Vab, Vbc, the setting options Vph-n and Vph-n selec-
tive are not available for parameters 614 and 615.
In a single-phase voltage transformer connection, the measured quantities are directly compared to the
threshold values and the parameterization of and the parameterization of the characteristic quantity switch-
over is ignored.
2.1.3.3

Settings

Addresses which have an appended "A" can only be changed with DIGSI, under "Additional Settings".
The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secon-
dary 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
211A TMax CLOSE CMD
212 BkrClosed I MIN
213 VT Connect. 3ph
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
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
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
Default Setting Comments
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
1.00 sec Maximum Close Command
Duration
0.04 A Closed Breaker Min.
Current Threshold
0.20 A
Van, Vbn, Vcn VT Connection, three-
phase
Functions
2.1 General
57