Siemens siprotec 7SJ63, Инструкция по эксплуатации

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Functions
6-136
7SJ63 Manual
C53000-G1140-C120-1
be set for only a few seconds. In areas with frequent thunderstorms, a shorter blocking
time may be necessary to avoid feeder lockout due to sequential lightning strikes. A
longer blocking time should be chosen if there is no possibility to monitor the circuit
breaker ready status (see below) during multiple reclosing. In this case, the blocking
time should be longer than the time required for the circuit breaker mechanism to be
ready.
If a dynamic blocking of the automatic reclosing system was initiated, then reclosing
functions remain blocked until the circuit breaker is closed manually again (not from a
protective function). The setting at address
6$)(7<UHDG\
establishes
how long automatic reclosing blocking is extended, after the dynamic blocking is reset.
In this way the delay set at address
also establishes how long automatic reclos-
ing is blocked after manual closing of the circuit breaker. Address should be set
to ensure a safe close and trip of the circuit breaker (0.5 to 1.0 seconds).
Circuit Breaker
Monitoring 1. Not applicable for version 7SJ61**–**C**– and 7SJ61**–**P**
If circuit breaker monitoring is desired, address
&+(&.&%"
should be set to
monitor before each reclosing attempt (
&KNHDFKF\FOH
), otherwise address
should be set not to monitor (
1RFKHFN
). If monitoring is not possible, address
should be set not to monitor.
If circuit breaker monitoring is accomplished via a binary input that detects a circuit
breaker ready condition, then the device must detect a ready condition prior to the
elapse of the time delay set at address
&%7,0(287
or further reclosing will
be suspended.
2. Not applicable for version 7SJ61**–**A**– and 7SJ61**–**M**
If circuit breaker monitoring is accomplished via a binary input that picks up when the
breaker is not ready (FNo.
!7:$,7
), then a time delay set at address
0$;,QKLELW7,0(
is started when the dead time has elapsed, and the binary input
must drop out before the time delay elapses, otherwise further reclosing will be sus-
pended.
Open Breaker
Times The dead time preceding the first reclosing attempt is set at address
'($'7,0(
3+
for the multiple phase fault reclosing program and at address DEADTIME
1:G for the single phase fault reclosing program. The dead time should be set long
enough to allow a temporary fault to clear (0.9 to 1.5 seconds) unless stability is a con-
cern, in which case faster times may be required (typically 0.3 to 0.6 seconds). The
dead times for the second (2
nd
) through fourth (4
th
) reclosing attempts are set at ad-
dresses , , and respectively for the multiple phase reclosing program
and at addresses , , and respectively for the single phase reclosing
program. As was stated earlier, the dead times preceding the fifth (5th) through the
ninth (9th) reclosing attempts are equal to the open breaker time which precedes the
fourth (4th) reclosing attempt.
The number of reclosing attempts is set at address
2)5(&/3+
for the
multiple phase reclosing program and at address
2)5(&/*1'
for the
single phase reclosing program.
Blocking Three-
Phase Faults Regardless of which reclosing program is executed, automatic reclosing can be
blocked for three-phase faults at address
3RO3,&.83%/.
. The pickup of
all three phases for a specific phase element is the criterion required for three-phase
fault blocking.
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