Siemens siprotec 7SD5, User Manual

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2.24 Ancillary Functions
429
7SD5 Manual
C53000-G1176-C169-1
2.24.7 Measured Values Constellation
2.24.7.1 Functional Description
The measured values constellation of the possible devices 1 to 6 are showed here by
evaluating the device (see Table 2-23). Information for further devices is given in the
Appendix.
The computation of this measured values constellation is also executed during an ex-
isting system fault in an interval of approx. 0.5 s.
Table 2-23 Measured values constellation for device 1
2.24.8 Oscillographic Fault Records
2.24.8.1 Functional Description
The general line protection 7SD5 is equipped with a fault recording function. The in-
stantaneous values of measured values
i
L1
, i
L2
, i
L3
, 3
i0
, u
L1
, u
L2
, u
L3
, 3 u
0
as well as I
diffL1
, I
diffL2
, I
diffL3
, I
RestL1
, I
RestL2
, I
RestL3
(voltages depending on the connection) are sampled at intervals of 1 ms (for 50 Hz)
and stored in a circulating buffer (20 samples per cycle). During a system fault these
data are stored over a time span that can be set (5 s at the longest for each fault
record). Up to 8 faults can be stored. The total capacity of the fault record memory is
approx. 15 s. The fault recording buffer is updated when a new fault occurs, so that
acknowledging is not necessary. In addition to storage of the fault recording by the pro-
tection fault detection, this may also be initiated via binary input, the integrated keypad
and display, or via the serial operator or service interface.
For the differential protection system of a protected object, all fault records of all ends
are synchronized by time management features. This ensures that all fault records
operate with exactly the same time basis. Therefore, equal measured values are co-
incident at all ends.
No. Information Type of In-
formation
Comments
7761 „Relay ID“ MW Device address of the device
7762 „IL1_opN=“ MW I L1 (% of nominal operational current)
7763 „
Φ
I L1=“ MW Angle I L1_remote <-> I L1_local
7764 „IL2_opN=“ MW I L2 (% of nominal operational current)
7765 „
Φ
I L2=“ MW Angle I L2_remote <-> I L2_local
7766 „IL3_opN=“ MW I L3 (% of nominal operational current)
7767 „
Φ
I L3=“ MW Angle I L3_remote <-> I L3_local
7769 „UL1_opN=“ MW UL1 (% of nominal operational voltage)
7770 „
Φ
U L1=“ MW Angle UL1_remote <-> UL1_local
7771 „UL2_opN=“ MW UL2 (% of nominal operational voltage)
7772 „
Φ
U L2=“ MW Angle UL2_remote <-> UL2_local
7773 „UL3_opN=“ MW UL3 (% of nominal operational voltage)
7774 „
Φ
U L3=“ MW Angle UL3_remote <-> UL3_local
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