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AND
AND
AND
OR
OR
PICKUP
52a
initiate
ANSI10000254-1-en.vsd
CLOSECB
S
R
Q
CBClosed
0-tAutoContWait
0
ANSI10000254 V1 EN
Figure 183:
Automatic proceeding of shot 2 to 5
11.3.6.11
Initiation of reclosing from CB open information
If a user wants to apply initiation of auto-reclosing from CB open position instead of from
protection trip signals, the function offers such a possibility. This starting mode is selected
by a setting parameter
StartByCBOpen
=
Enabled
. One needs then to block reclosing at all
manual trip operations. Typically, one also set
CBAuxContType
=
NormClosed
and
connect a CB auxiliary contact of type NC (normally closed) to inputs 52a and RI. When
the signal changes from CB closed to CB open an auto-reclosing start pulse of limited
length is generated and latched in the function, subject to the usual checks. Then the
reclosing sequence continues as usual. One needs to connect signals from manual tripping
and other functions, which shall prevent reclosing, to the input INHIBIT.
1MRK 506 335-UUS A
Section 11
Control
387
Technical manual
Содержание REL650 series
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