4 Technical Data
284
7ST6 Manual
E50417-G1176-C251-A3
4.16
Auxiliary Functions
Measured Values
Operational Event Log Buffer
Fault Logging
Fault Recording
Operational measured values for currents
I, IX, IF in A primary and secondary, and in % I
N
Tolerance
1 % of I
N
for I
≤
I
N
and 1 % of I for I > I
N
Operational measured values for voltages
U, UF, URef in kV primary, in V secondary or in % U
N
Tolerance
1 % of U
N
for U
≤
U
N
and 1 % of U for U > U
N
Operational measured values of impedances
R in
Ω
primary and secondary
Operational measured values for power
P in KW or MW
Q in KVA or Mvar
Tolerance
2 % each
Phase angle
ϕ
Tolerance
0.02
Operational measured values for frequency
f in Hz and % f
N
Area
90 % to 110 % of f
N
Tolerance
20 mHz
Thermal measured values
T
Line
in
°
C
T
Ambient
in
°
C
Operational measured values of synchro check
U
Line
; U
Sync
in kV primary
f
Line
; f
Sync
in Hz
Capacity
200 records
Capacity
8 faults with a total of max. 600 records
Number of stored fault records
Max. 8
Storage time
Max. 5 s for each fault
Approx. 15 s in total
Sampling rate at f
N
= 16.7 Hz
1.25 ms
Sampling rate at f
N
= 25 Hz
1.25 ms
Sampling rate at f
N
= 50 Hz
1.25 ms
Sampling rate at f
N
= 60 Hz
1.05 ms
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