•
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
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.
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 C Setting Options Default Setting Comments
201 CT Starpoint towards Line
towards Busbar
towards Line CT Starpoint
202 Vnom PRIMARY 0.10 .. 800.00 kV 20.00 kV Rated Primary Voltage
203 Vnom SECONDARY 34 .. 225 V 100 V Rated Secondary Voltage
(L-L)
204 CT PRIMARY 10 .. 50000 A 400 A CT Rated Primary Current
205 CT SECONDARY 1A
5A
1A CT Rated Secondary
Current
206A Vph/Vdelta 1.00 .. 3.00 1.73 Matching ratio Phase-VT To
Open-Delta-VT
209 PHASE SEQ. A B C
A C B
A B C Phase Sequence
210A TMin TRIP CMD 0.01 .. 32.00 sec 0.15 sec Minimum TRIP Command
Duration
211A TMax CLOSE CMD 0.01 .. 32.00 sec 1.00 sec Maximum Close Command
Duration
212 BkrClosed I MIN 1A 0.04 .. 1.00 A 0.04 A Closed Breaker Min.
Current Threshold
5A 0.20 .. 5.00 A 0.20 A
213 VT Connect. 3ph Van, Vbn, Vcn
Vab, Vbc, VGnd
Vab, Vbc
Van, Vbn, Vcn VT Connection, three-
phase
2.1.3.3
Functions
2.1 General
SIPROTEC Compact, 7SC80, Manual 57
E50417-G1140-C486-A8, Edition 07.2017
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