Fault Recording In The Bay Unit ("Local Fault Recording") - Siemens SIPROTEC 7SS523 V3.2 Manual

5.13

Fault Recording in the Bay Unit ("Local Fault Recording")

5.13.1 Functional Description
5.13.2 Setting Notes
INITIATION
T-MAX
T-PRE
Note
A description of the central unit's fault recording function is provided in
Chapter 5.6, page 158.
Reading out of oscillographic fault recording data is described in Chapter 6.2.3, page
215.
The instantaneous measured values are stored at intervals of 1 ms (f
833 µs (f = 60 Hz) in a buffer of the bay unit. The instantaneous currents are meas-
N
ured for each phase.
A fault record is initiated by
• a protection or trip from an internal protection function,
• a start from DIGSI, from the central unit front panel or via a binary input with the an-
nunciation ">Trig.Wave.Cap." marshalled to it.
A total of 5 s max is available in the bay unit for oscillographic fault recording. This in-
terval allows to store up to 8 fault records.
New fault records are always entered in the fault record data buffer. The oldest fault
record data are overwritten by the new data.
An oscillographic record can be triggered by a change in status of a binary input, or by
an input at the integrated keypad, or through the PC port.
The parameter INITIATION
storage criterion for fault recording.
With setting STORAGE BY FD. the storage criterion is defined to be the fault detection
by the device. The reference instant for fault recording is the fault detection by the de-
vice.
With setting STORAGE BY TRIP the storage criterion is defined to be the device trip.
The reference instant for fault recording is the fault detection by the device.
With setting START WITH TRIP the storage criterion is defined to be the device trip.
The reference instant for fault recording is the device trip.
The parameter T-MAX
for one fault record.
The parameter T-PRE
fault recording. The pre-trigger time starts at the specified time before the storage cri-
Fault Recording in the Bay Unit ("Local Fault Recording")
7402/BU
is used to set the reference instance and the
( )
7410/BU
is used to set the maximum time period available
( )
7411/BU
is used to set the pre-trigger time for starting the
( )
C53000-G1176-C182-1
7SS52 V4 Manual
= 50 Hz) and
N
179