Siemens SIPROTEC, Manual

Page: 473 / 776

Functions
2.26 Additional Functions
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
473
Table 2-21 Operational measured values of the local device
1)
according to address 1104
2)
according to address 1103
Measured Values Primary Secondary % Referred to
I
L1
;
I
L2
;
I
L3
Phase currents A A Nominal operational current
1)
I
EE
Sensitive earth current A mA Nominal operational current
3)1)
3
I
0
Earth current A A Nominal operational current
1)
ϕ
(
I
L1
-I
L2
),
ϕ
(
I
L2
-
I
L3
),
ϕ
( 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
,
I
P
Transformer starpoint current or earth
current of the parallel line A A Nominal operational current
3)1)
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 Nominal operational voltage /
√
3
2)
3U
0
Displacement voltage kV V Nominal operational voltage /
√
3
2)
ϕ
(U
L1
-U
L2
),
ϕ
(U
L2
-U
L3
),
ϕ
(U
L3
-U
L1
)
Phase angle of the phase voltages
towards each other ° – –
ϕ
(U
L1
-
I
L1
),
ϕ
(U
L2
-
I
L2
),
ϕ
(U
L3
- I
L3
)
Phase angle of the phase voltages
towards the phase currents ° – –
U
1
, U
2
Positive and negative sequence
component of the voltages kV V Nominal operational voltage /
√
3
2)
U
X
; U
EN
Voltage at measuring input U
4
– V –
U
sy2
Voltage at measuring input U
4
kV V Operational rated voltage or
Operational rated voltage /
√
3
2)4)5)
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)
R
L1-E
, R
L2-E
,
R
L3-E
, R
L1-L2
,
R
L1-L2
, R
L3-L1
,
Operational resistance of all loops
Ω Ω
–
X
L1-E
, X
L2-E
,
X
L3-E
, X
L1-L2
,
X
L2-L3
, X
L3-L1
,
Operational reactance of all loops
Ω Ω
–
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
U
sy1
, U
sy2
, U
diff
Measured voltage values
(for synchronsim check) kV – –
f
sy1
, f
sy2
, f
diff
Measured frequency values
(for synchronism check) Hz – –
ϕ
Diff
Amount of phase angle difference
between line and busbar
(for synchronism check)
°
– –