2.21 Auxiliary functions
351
7SA522 Manual
C53000-G1176-C155-3
2.21.3 Measurement
2.21.3.1 Method of Operation
A series of measured values and the values derived from them are available for on-
site retrieval or for data transfer.
Precondition for a correct display of primary and percentage values is the complete
and correct entry of the nominal values of the instrument transformers and the power
system.
Display of Mea-
sured Values
Depending on the ordering code, connection type to the device and the configured
protection function, only some of the listed operational measured values in Table 2-14
may be available. Only one of the current values I
EE
, I
Y
and I
P
can apply, namely the
one which is connected to the current measuring input I
4
. Phase-to-earth voltages can
only be measured if the phase-to-earth voltage inputs are connected. The displace-
ment voltage 3U
0
is e-n-voltage multiplied by √3 — if U
en
is connected — or calculated
from the phase-to-earth voltages 3U
0
= |U
L1
+ U
L2
+ U
L3
|. All three voltage inputs must
be phase-earth connected to this end. The zero-sequence voltage U
0
indicates the
voltage between the delta center and earth.
If the device features a synchronism and voltage check function, and provided that
these features have been set to during configuration of the scope of the device
(address (QDEOHG), and that the parameter 8WUDQVIRUPHU (address ) has
been set to 8V\QFWUDQVI, the characteristic values (voltages, frequencies, differ-
ences) can be read out.
The power and operating values upon delivery are set such that power in line direction
is positive. Active components in line direction and inductive reactive components in
line direction are also positive. The same applies for the power factor cosϕ. It is occa-
sionally desired to define the power draw from the line (e.g. as seen from the consum-
1028 Σ IL2 = OUT Accumulation of interrupted current L2
1029 Σ IL3 = OUT Accumulation of interrupted current L3
1030 Max IL1 = OUT Max. fault current Phase L1
1031 Max IL2 = OUT Max. fault current Phase L2
1032 Max IL3 = OUT Max. fault current Phase L3
2895 AR #Close1./1p= OUT No. of 1st AR-cycle CLOSE commands,1pole
2896 AR #Close1./3p= OUT No. of 1st AR-cycle CLOSE commands,3pole
2897 AR #Close2./1p= OUT No. of higher AR-cycle CLOSE commands,1p
2898 AR #Close2./3p= OUT No. of higher AR-cycle CLOSE commands,3p
7751 PI1 TD MV Prot Int 1:Transmission delay
7752 PI2 TD MV Prot Int 2:Transmission delay
7753 PI1A/m MV Prot Int 1: Availability per min.
7754 PI1A/h MV Prot Int 1: Availability per hour
7755 PI2A/m MV Prot Int 2: Availability per min.
7756 PI2A/h MV Prot Int 2: Availability per hour
7757 PI1 DTOG MV Prot Int 1: DTOG (Device Time Offset)
7758 PI2 DTOG MV Prot Int 2: DTOG (Device Time Offset)
No. Information Type of In-
formation
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