Siemens SIPROTEC Manual page 473

Table 2-21 Operational measured values of the local device
Measured Values
; I ; I Phase currents
I
L1 L2 L3
I Sensitive earth current
EE
3I Earth current
0
-I ), ϕ(I -I ), Phase angle of the phase currents
ϕ(I
L1 L2 L2 L3
-I ) towards each other
ϕ(I
L3 L1
I , I Positive and negative sequence cur-
1 2
rents
I , I Transformer starpoint current or earth
Y P
current of the parallel line
U , U , U Phase-to-phase voltages
L1-L2 L2-L3 L3-L1
U , U , U Phase-earth voltage
L1-E L2-E L3-E
3U Displacement voltage
0
-U ), ϕ(U -U ), Phase angle of the phase voltages
ϕ(U
L1 L2 L2 L3
-U ) towards each other
ϕ(U
L3 L1
-I ), ϕ(U -I ), Phase angle of the phase voltages
ϕ(U
L1 L1 L2 L2
-I ) towards the phase currents
ϕ(U
L3 L3
U , U Positive and negative sequence
1 2
component of the voltages
U ; U Voltage at measuring input U
X EN
U Voltage at measuring input U
sy2
U Positive sequence component of volt-
1compound
ages at the remote end (if compound-
ing is active in voltage protection)
R , R , Operational resistance of all loops
L1-E L2-E
R , R ,
L3-E L1-L2
R , R ,
L1-L2 L3-L1
X , X , Operational reactance of all loops
L1-E L2-E
X , X ,
L3-E L1-L2
X , X ,
L2-L3 L3-L1
S, P, Q Apparent, active and reactive power
cos ϕ Power factor
f Frequency (constellation frequency)
/Θ , Θ /Θ , Thermal value of each phase,
Θ
L1 TRIP L2 TRIP
/Θ referred to the tripping value
Θ
L3 TRIP
Resulting thermal value,
Θ/Θ
TRIP
referred to the tripping value, calculat-
ed according to the set method
U , U , U Measured voltage values
sy1 sy2 diff
(for synchronsim check)
f , f , f Measured frequency values
sy1 sy2 diff
(for synchronism check)
Amount of phase angle difference
ϕ
Diff
between line and busbar
(for synchronism check)
1)
according to address 1104
2)
according to address 1103
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
Primary Secondary
A A
A mA
A A
°
A A
A A
kV V
kV V
kV V
°
°
kV V
– V
4
kV V
4
kV V
Ω Ω
Ω Ω
MVA,
MW,
MVAR
(abs) (abs)
Hz Hz
%
%
kV
Hz
°
2.26 Additional Functions
% Referred to
Nominal operational current
Nominal operational current
Nominal operational current
– –
Nominal operational current
Nominal operational current
Nominal operational voltage
Nominal operational voltage / √3
Nominal operational voltage / √3
– –
– –
Nominal operational voltage / √3
–
Operational rated voltage or
Operational rated voltage / √3
Operational rated voltage / √3
–
–
– ·I Nominal operational
√3·U
N N
quantities
–
Nominal frequency
– Trip overtemperature
– Trip overtemperature
– –
– –
– –
Functions
1)
3)1)
1)
1)
3)1)
2)
2)
2)
2)
2)4)5)
2)
1)2)
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