2.22 Additional Functions
325
7UT613/63x Manual
C53000-G1176-C160-2
2.22.8 Oscillographic Fault Recording
The 7UT613/63x differential protection is equipped with a fault recording function.
2.22.8.1 Function Description
The instantaneous values of measured values
I
L1 S1
, I
L2 S1
, I
L3 S1
, I
L1 S2
, I
L2 S2
, I
L3S2
, 3I
0S1
, 3I
0S2
, I
7
, I
8
as well as
I
diff L1
, I
diff L2
, I
diff L3
, I
rest L1
, I
rest L2
, I
rest L3
are sampled at intervals of 1,667 ms (for 50 Hz) and stored in a circulation buffer (16
samples per cycle). When used as single-phase busbar protection, the first six feeder
currents
1
to I
6
are stored instead of the phase currents, the zero sequence currents
are not applicable.
During a system fault, these data are stored over a time span that can be set (5 s at
most for each fault record). Up to 8 faults can be stored. The total capacity of the fault
record memory is approx. 5 s. The fault recording buffer is updated when a new fault
occurs, so that acknowledgement is not required. Storage of the fault recording by the
protection fault detection can also be initiated via binary input, the integrated keypad
and display, or via the serial operator or service interface.
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 power or rms values from the measured
values. A selection may be made as to whether the measured quantities are repre-
sented as primary or secondary values. Binary signal traces (marks) of particular
events e.g. „fault detection“, „tripping“ 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. The evaluation of the data is done by the respec-
tive programs in the central device. The measured quantities are referred to their
maximum values, scaled to their rated values and prepared for graphic representation.
Binary signal traces (marks) of particular events e.g. „fault detection“, „tripping“ are
also represented.
235.2125 $00 Time Out OUT Function $00 TRIP Delay Time Out
235.2126 $00 TRIP OUT Function $00 TRIP
235.2128 $00 inval.set OUT Function $00 has invalid settings
235.2701 >$00 Blk Trip12 SP >Function $00 block TRIP L12
235.2702 >$00 Blk Trip23 SP >Function $00 block TRIP L23
235.2703 >$00 Blk Trip31 SP >Function $00 block TRIP L31
235.2704 $00 Pick-up L12 OUT Function $00 Pick-up L12
235.2705 $00 Pick-up L23 OUT Function $00 Pick-up L23
235.2706 $00 Pick-up L31 OUT Function $00 Pick-up L31
No. Information Type of In-
formation
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