Schweitzer Engineering Laboratories SEL-700G Series, Instruction Manual

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4.234
SEL-700G Relay Instruction Manual Date Code 20170814
Protection and Logic Functions
Report Settings (SET R Command)
Report Settings (SET R Command)
The report settings use Relay Word bits for the SER trigger, as shown in
Table 4.92 (see Appendix J: Relay Word Bits for more information).
SER Chatter Criteria
The SER includes an automatic deletion and reinsertion function to prevent
overfilling of the SER buffer with chattering information. Each processing
interval, the relay checks the Relay Word bits in the four SER reports for any
changes of state. When detecting a change of state, the relay adds a record to
the SER report that contains the Relay Word bit(s), new state, time stamp, and
checksum (see Section 9: Analyzing Events for more information).
When detecting oscillating SER items, the relay automatically deletes these
oscillating items from SER recording. Table 4.91 shows the auto-removal
settings.
To use the automatic deletion and reinsertion function, proceed with the
following steps:
Step 1. Set Report setting ESERDEL (Enable SER Delete) to Y to
enable this function.
Step 2. Select values for the setting SRDLCNT (SER Delete Count)
and the setting SRDLTIM (SER Delete Time) that mask the
chattering SER element.
Setting SRDLTIM declares a time interval during which the relay qualifies an
input by comparing the changes of state of each input against the SRDLCNT
setting. When an item changes state more than SRDLCNT times in an
SRDLTIM interval, the relay automatically removes these Relay Word bits
from SER recording. Once the relay deletes these bits from the recording, the
relay ignores the item(s) for the next nine intervals. At the ninth interval, the
chatter criteria is again checked and, if the point does not exceed the criteria, it
is automatically reinserted into recording at the starting of the tenth interval.
PB4A_LED EQUATION SEL
OGIC
PB4A_LED := NOT 52AX OR (SV04
AND SV05T AND NOT SV04T)
a
PB4A_LED := NOT 52AX OR (SV04
AND SV05T AND NOT SV04T AND
NOT LT02)
b,c
PB4B_LED EQUATION SEL
OGIC
PB4B_LED := 0
a
PB4B_LED := NOT 52AY OR (SV04
AND SV05T AND NOT SV04T AND
LT02)
b,c
a
Default settings shown apply to SEL-700G0 and G1.
b
Default settings shown apply to SEL-700GT.
c
Default settings shown apply to SEL-700GW.
Table 4.90 Pushbutton LED Settings (Sheet 2 of 2)
Setting Prompt Setting Range Setting Name :=
Table 4.91 Auto-Removal Settings
Settings Prompt Setting Range
Auto-Removal Enable Y, N ESERDEL := N
Number of Counts 2–20 counts SRDLCNT := 5
Removal Time 0.1–90.0 seconds SRDLTIM := 1.0