Remote Measured Values; Function Description; Measured Values Constellation - Siemens SIPROTEC 7SD610 Manual

Table 2-14 Constellation measured values for device 1
No. Information
7761 „Relay ID"
7762 „IL1_opN="
7763 „ΦI L1="
7764 „IL2_opN="
7765 „ΦI L2="
7766 „IL3_opN="
7767 „ΦI L3="
7769 „UL1_opN="
7770 „ΦU L1="
7771 „UL2_opN="
7772 „ΦU L2="
7773 „UL3_opN="
7774 „ΦU L3="
2.17.8 Oscillographic Fault Records

2.17.8.1 Function Description

The 7SD610 differential protection is equipped with a fault recording function. The instantaneous values of
measured values
i , i , i , 3 , u
L1 L2 L3 i0
(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). For a fault, the data are stored for an adjustable period of time, but no more than
5 seconds per fault. A total of 8 faults can be saved spanning a total time of 15 s maximum. The fault record
memory is automatically updated with every new fault, so that no acknowledgment is required. The storage of
fault values can be started by pickup of a protection function, as well as via binary input and via the serial in-
terface.
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 coincident at all ends.
The data can be retrieved via the serial interfaces by means of a personal computer and evaluated with the
operating software DIGSI and the graphic analysis software SIGRA 4. The latter graphically represents the data
recorded during the system fault and calculates additional information such as the impedance or r.m.s. values
from the measured values. A selection may be made as to whether the currents and voltages are represented
as primary or secondary values. Binary signal traces (marks) of particular events, e.g. „fault detection", „trip-
ping" are also represented.
If the device has a serial system interface, the fault recording data can be passed on to a central device via this
interface. Data are evaluated by appropriate programs in the central device. Currents and voltages are referred
to their maximum values, scaled to their rated values and prepared for graphic presentation. Binary signal
traces (marks) of particular events e.g. „fault detection", „tripping" are also represented.
In the event of transfer to a central device, the request for data transfer can be executed automatically and can
be selected to take place after each fault detection by the protection, or only after a trip.
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
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, u , u , 3 u or u or u
L1 L2 L3 0 en
Device address of the first devcie
IL1 (% of operational rated current)
Angle IL1_remote <-> IL1_local
IL2 (% of operational rated current)
Angle IL2_remote <-> IL2_local
IL3 (% of operational rated current)
Angle IL3_remote <-> IL3_local
UL1 (% of operational rated voltage)
Angle UL1_remote <-> UL1_local
UL2 (% of operational rated voltage)
Angle UL2_remote <-> UL2_local
UL3 (% of operational rated voltage)
Angle UL3_remote <-> UL3_local
as well asI , I , I
x diffL1 diffL2 diffL3
2.17 Additional Functions
Explanation
, I , I , I
stabL1 stabL2 stabL3
Functions
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