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1MRK 505 370-UEN D
12.2.2.7
Maximum number of reclosing shots
The maximum number of auto reclosing shots in an auto reclosing cycle is selected by the
setting
the first auto reclosing shot is set by the setting
auto reclosing. The other alternatives include some single-phase or two-phase auto reclosing.
Usually there is no two-phase tripping arranged, and then there will be no two-phase auto
reclosing.
The decision for single- and three-phase trip is also made in the tripping logic (SMPTTRC)
function block where the setting
ARMode = 3ph, (normal setting for a three-phase shot)
12.2.2.8
Three-phase auto reclosing, one to five shots according to the
three-phase trip PREP3P output is always set (high). A trip operation is made as a three-phase
trip for all type of faults. The auto reclosing is as a three-phase auto reclosing as in mode
1/2/3ph described below. All signals, blockings, inhibits, timers, requirements and so on, are
the same as in the example described below.
ARMode = 1/2/3ph
12.2.2.9
Single-phase, two-phase or three-phase auto reclosing first shot, followed by 3-phase auto
reclosing shots, if selected. Here, the auto recloser is assumed to be "On" and "Ready". The
circuit breaker is closed and the operation gear ready (operating energy stored).
STARTHS ) is received and sealed-in. The READY output is reset (set to false). ACTIVE output
(or
is set.
TR2P and TR3P inputs are low (i.e. single-phase trip): The timer for single-phase auto
•
If
reclosing dead time is started and the
activated. It can be used to suppress pole disagreement and earth-fault protection trip
during the single-phase dead time interval..
TR2P input is high and TR3P input is low (i.e. two-phase trip): The timer for two-phase
•
If
auto reclosing dead time is started and the
is activated.
TR3P input is high (i.e. three-phase trip): The timer for three-phase auto reclosing dead
•
If
time,
activated and
While any of the auto reclosing dead time timers are running, the
When the dead time runs out, the respective internal signal is transmitted to the output
module for further checks and to issue a breaker closing command.
When a circuit breaker closing command is issued, the prepare three-phase output trip is set.
When issuing a circuit breaker closing command the
takes place during that time, the auto recloser resets to the "Ready" state and the
output resets. If the first reclosing shot fails, a three-phase trip will be initiated and three-
phase reclosing can follow, if selected.
ARMode = 1/2ph , 1-phase or 2-phase reclosing in the first shot
12.2.2.10
At single-phase or two-phase tripping, the operation is as in the example described above,
program mode
three-phase auto reclosing can follow, if selected. In the event of a three-phase trip,
high, the auto recloser will be inhibited and no auto reclosing takes place.
Busbar protection REB670
Application manual
NoOfShots . A maximum of five shots can be done. The type of auto reclosing used at
t1 3Ph or t1 3PhHS , is started depending on if START or STARTHS input has been
3PT1 output (three-phase reclosing shot 1 in progress) is set..
1/2/3ph . If the first reclosing shot fails, a three-phase trip will be issued and
ARMode . The first alternative is three-phase
3 phase , 1ph/3Ph (or 1ph/2ph/3Ph ) is selected.
1PT1 output (single-phase reclosing in progress) is
2PT1 output (two-phase reclosing in progress)
tReclaim timer is started. If no tripping
NoOfShots setting. The prepare
START input
INPROGR output is activated.
ACTIVE
TR3P input
Section 12
Control
M12391-120 v7
M12391-124 v5
M12391-127 v8
M12391-136 v5
269
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