Functions
2.17 Additional Functions
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
251
Table 2-11 Operational measured values of the local device
1)
according to address 1104
2)
according to address 1103
3)
considering factor 221 I4/Iph CT
Measured Values Primary Second-
ary
% Referred to
I
L1
; I
L2
; I
L3
Phase currents A A Nominal operational current
1)
3I
0
Earth current A A Nominal operational current
1)
Ï•(I
L1
-I
L2
), Ï•(I
L2
-I
L3
),
Ï•(I
L3
-I
L1
)
Phase angle of the phase currents
towards each other
°– –
I
1
, I
2
Positive and negative sequence cur-
rents
A A Nominal operational current
1)
I
Y
Transformer starpoint current A A Nominal operational current
1)3)
U
L1-L2
, U
L2-L3
, U
L3-L1
Phase-to-phase voltages kV V Nominal operational voltage
2)
U
L1-E
, U
L2-E
, U
L3-E
Phase-earth voltage kV V Rated operational voltage / √3
2)
3U
0
Displacement Voltage kV V Rated operational voltage / √3
2)
Ï•(U
L1
-U
L2
), Ï•(U
L2
-U
L3
),
Ï•(U
L3
-U
L1
)
Phase angle of the phase voltages
towards each other
°– –
Ï•(U
L1
-I
L1
), Ï•(U
L2
-I
L2
),
Ï•(U
L3
-I
L3
)
Phase angle of the phase voltages
towards the phase currents
°– –
U
1
, U
2
Positive and negative sequence com-
ponent of the voltages
kV V Rated operational voltage / √3
2)
U
X
, U
EN
Voltage at measuring input U
4
–V –
U
1compound
Positive sequence component of volt-
ages at the remote end (if compound-
ing is active in voltage protection)
kV V Operational rated voltage / √3
2)
S, P, Q Apparent, active and reactive power MVA,
MW,
MVAR
– √3·U
N
·I
N
Nominal operational
quantities
1)2)
cos ϕ Power factor (abs) (abs) –
f Frequency (constellation frequency) Hz Hz Nominal Frequency
Θ
L1
/Θ
TRIP
, Θ
L2
/Θ
TRIP
,
Θ
L3
/Θ
TRIP
Thermal value of each phase,
referred to the tripping value
% – Trip overtemperature
Θ/Θ
TRIP
Resulting thermal value,
referred to the tripping value, calculat-
ed according to the set method
% – Trip overtemperature
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