Table. 5.4.6 - 221. Information displayed by the function.
Name
Range
Step
Description
SOTF condition
0: Normal
1: Init
2: Active
3: Trip
4: Blocked
-
Displays status of the control function.
Function blocking
The function can be blocked by activating the BLOCK input. This prevents the function's active time
from starting.
Events and registers
The switch-on-to-fault function (abbreviated "SOF" in event block names) generates events and
registers from the status changes in ACTIVATED, TRIP and BLOCKED. The user can select which
event messages are stored in the main event buffer: ON, OFF, or both.
The events triggered by the function are recorded with a time stamp and with process data values.
Table. 5.4.6 - 222. Event codes.
Event number
Event channel
Event block name
Event code
Description
3904
61
SOF1
0
SOTF Init ON
3905
61
SOF1
1
SOTF Init OFF
3906
61
SOF1
2
SOTF Block ON
3907
61
SOF1
3
SOTF Block OFF
3908
61
SOF1
4
SOTF Active ON
3909
61
SOF1
5
SOTF Active OFF
3910
61
SOF1
6
SOTF Trip ON
3911
61
SOF1
7
SOTF Trip OFF
The function registers its operation into the last twelve (12) time-stamped registers. The register of the
function records the ON process data of ACTIVATED events. The table below presents the structure of
the function's register content.
Table. 5.4.6 - 223. Register content.
Date and time
Event code
SOTF remaining time
SOTF been active time
dd.mm.yyyy
hh:mm:ss.mss
3904...3911
Descr.
The time remaining of the set release
time.
The time the function has been
active.
5.4.7 Synchrocheck (ΔV/Δa/Δf; 25)
Checking the synchronization is important to ensure the safe closing of the circuit breaker between two
systems. Closing the circuit breaker when the systems are not synchronized can cause several
problems such as current surges which damage the interconnecting elements. The synchrocheck
function has three stages: SYN1, SYN2 and SYN3. Their function and availability of these
stages depend on which voltage channels are set to "SS" mode or not. Voltage measurement settings
are located at
Measurements
→
Transformers
→
VT module.
A
AQ
Q-F215
-F215
Instruction manual
Version: 2.04
340