Settings For Oscillographic Fault Recording; Information For The Oscillographic Fault Recording - Siemens Siprotec 7UM62 Manual

Functions

2.45.6.1 Settings for Oscillographic Fault Recording

Addr. Setting Title
401 WAVEFORMTRIG-
GER
402 WAVEFORM DATA Fault event
403 MAX. LENGTH
404 PRE. TRIG. TIME
405 POST REC. TIME
406 BinIn CAPT.TIME

2.45.6.2 Information for the Oscillographic Fault Recording

F.No. Alarm
00004 >Trig.Wave.Cap.
296
SETTINGS menu. Waveform capture makes a distinction between the trigger for an
oscillographic record and the criterion to save the record (address 0401
WAVEFORMTRIGGER). Normally the trigger is the pickup of a protective element, i.e.
when a protective element picks up the time is 0. The criterion for saving can be the
pickup as well (Save w. Pickup), or the device trip (Save w. TRIP). Another
option is to set (Start with TRIP). A trip command issued by the device is both the
trigger and the criterion to save the record with this setting.
A waveform capture includes in machine protection always the complete course of a
fault. An oscillographic fault record includes data recorded prior to the time of trigger,
and data after the dropout of the recording criterion. Therefore address 0402
WAVEFORM DATA is preset to Fault event.
The user determines the length of pre-trigger time and post-dropout time to be
included in the fault record with the settings in address 0404 PRE. TRIG. TIME and
address 0405 POST REC. TIME. The maximum length of time of a record MAX.
LENGTH is entered at address 0403. The setting depends on the criterion for storage,
the delay time of the protective functions and the desired number of stored fault
events. The largest value here is 5 s for fault recording of instantaneous values, 80 s
for recording of r.m.s. values (see address 0104). A total of 8 records can be saved.
Note: These times apply for 50 Hz. They will be different with another frequency. If
RMS values are stored, the times stated for parameters 0403 to 0406 will be 16
times longer.
An oscillographic record can be triggered and saved by a change in status of a binary
input or via the operator interface connected to a PC. The trigger is dynamic. The
length of a record for these special triggers is set at address 0406 BinIn
CAPT.TIME (upper bound is MAX. LENGTH, address 0403). Pre-trigger and post-
dropout times are not included. If the binary input time is set to ∞, then the length of
the record equals the time that the binary input is activated (static), or the MAX.
LENGTH (address 0403), whichever is shorter.
Setting Options
Save with Pickup
Save with TRIP
Start with TRIP
Power System fault
0.30..5.00 sec
0.05..4.00 sec
0.05..0.50 sec
0.10..5.00 sec; ∞
>Trigger Waveform Capture
Default Setting
Save with Pickup Waveform Capture
Fault event Scope of Waveform Data
1.00 sec Max. length of a Waveform Cap-
ture Record
0.20 sec Captured Waveform Prior to
Trigger
0.10 sec Captured Waveform after Event
0.50 sec Capture Time via Binary Input
Comments
Comments
7UM62 Manual
C53000-G1176-C149-3