Description; Setting Notes - Siemens 7SC80 Manual

Functions
2.1 General
2.1.4.1

Description

The data of a fault event can be read out via the device interface and evaluated with the help of the SIGRA 4
graphic analysis software. SIGRA 4 graphically represents the data recorded during the fault event and also
calculates additional information from the measured values. Currents and voltages can be presented either as
primary or as secondary values. Signals are additionally recorded as binary tracks (marks), e.g. "pickup", "trip".
If port F of the device has been configured correspondingly, a central controller can import and evaluate the
fault record data via this interface. Currents and voltages are prepared for a graphic representation. Signals are
additionally recorded as binary tracks (marks), e.g. "pickup", "trip".
The retrieval of the fault data by the central controller takes place automatically either after each protection
pickup or after a tipping.
Depending on the selected type of connection of the voltage transformers (address 213 VT Connect. 3ph),
the following measured values are recorded in the fault record:
V
AB
V
BC
V
CA
V
A
V
B
V
C
The measurand Vx is always available.
NOTE
i
i
The signals used for the binary tracks can be allocated in DIGSI.
2.1.4.2

Setting Notes

Configuration
Fault recording (waveform capture) will only take place if address 104 OSC. FAULT REC. is set to Enabled.
Other settings pertaining to fault recording (waveform capture) are found in the Osc. Fault Rec.
submenu of the SETTINGS menu. Waveform capture makes a distinction between the trigger instant for an
fault record and the criterion to save the record (address 401 WAVEFORMTRIGGER). Normally, the trigger is
the pickup of a protection element, i.e. the time 0 is defined as the instant the first protection function picks
up. The criterion for saving may be both the device pickup (Save w. Pickup) or the device trip (Save w.
TRIP). A trip command issued by the device can also be used as trigger instant (Start w. TRIP), in this
case it is also the saving criterion.
A fault event starts with the pickup by any protection function and ends when the last pickup of a protection
function has dropped out. Usually this is also the extent of a fault recording (address 402 WAVEFORM DATA =
Fault event). If automatic reclosing is performed, the entire system fault — with several reclosing attempts
if necessary — can be recorded until the fault has been cleared for good (address 402 WAVEFORM DATA =
Pow.Sys.Flt.). This facilitates the representation of the entire system fault history, but also consumes
storage capacity during the automatic reclosing dead time(s).
The actual storage time begins at the pre-fault time PRE. TRIG. TIME (address 404) ahead of the reference
instant, and ends at the post-fault time POST REC. TIME (address 405) after the storage criterion has reset.
The maximum storage time for each fault recording (MAX. LENGTH) is entered in address 403. Recording per
fault must not exceed 6 seconds. A total of 8 records can be saved. However, the total length of time of all
fault records in the buffer must not exceed 11 seconds.
An fault record can be triggered by a status change of a binary input, or from a PC via the operator interface.
Storage is then triggered dynamically. The length of the fault recording is set in address 406 BinIn
CAPT.TIME (but not longer than MAX. LENGTH, address 403). Pre-fault and post-fault times will add to this.
62
Voltage connection
Van, Vbn, Vcn
yes
yes
yes
yes
yes
yes
Vab, Vbc, VGnd
yes
yes
yes
yes
yes
yes
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
Vab, Vbc
yes
yes
yes
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