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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:
Voltage Connection
Van, Vbn, Vcn
v
AB
v
BC
v
CA
v
A
v
B
v
C
v
N
v
x
Note
The signals used for the binary tracks can be allocated in DIGSI.
Note
If one of the current transformer connection types A,G2,C,G; G->B or A,G2,C,G; G2->B has been selected
via parameter 251 CT Connect., the ground current I
dicated under track I
.
I
Ns
2.1.4.2 Setting Notes
Specifications
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 oscillographic
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 with the dropout of the last pickup of a
protection function.
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 duration of each fault record (MAX. LENGTH) is entered at address 403. Recording per
fault must not exceed 5 seconds. At least 8 records can be saved altogether with a maximum total time of 18 s.
An oscillographic 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.
If the binary input time is set to ∞, the length of the record equals the time that the binary input is activated
(static), but not longer than the MAX. LENGTH (address 403).
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
Vab, Vbc, VGnd
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
yes
. The ground current detected by the fourth current transformer is indicated under track
N
Vab, Vbc
Vab, Vbc, Vx
yes
yes
yes
yes
yes
yes
yes
measured with the second current transformer is in-
N2
Functions
2.1 General
53
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