ABB Relion 670 Series Applications Manual page 291

1MRK 505 370-UUS Rev. K
12.2.2.6 Long trip signal
In normal circumstances the auto recloser is started with a protection trip command which resets quickly
due to fault clearing. The user can set a maximum start pulse duration tLongStartInh. This start pulse
duration time is controlled by setting LongStartInhib.
When start pulse duration signal is longer than set maximum start pulse duration, the auto reclosing
sequence interrupts in the same way as for a signal to the INHIBIT input.
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
NoOfShots. A maximum of five shots can be done. The type of auto reclosing used at the first auto
reclosing shot is set by the setting ARMode. The first alternative is three-phase auto reclosing. The other
alternatives include some single-phase or two-phase auto reclosing. Usually there is no two-pole 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 3 phase, 1ph/3Ph (or 1ph/2ph/3Ph) is selected.
12.2.2.8 ARMode = 3ph, (normal setting for a three-phase shot)
Three-phase auto reclosing, one to five shots according to the NoOfShots setting. The prepare three-
pole trip PREP3P output is always set (high). A trip operation is made as a three-pole 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.
12.2.2.9 ARMode = 1/2/3ph
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). START input (or STARTHS) is received
and sealed-in. The READY output is reset (set to false). ACTIVE output is set.
• If TR2P and TR3P inputs are low (i.e. single-phase trip): The timer for single-phase auto reclosing
dead time is started and the 1PT1 output (single-phase reclosing in progress) is activated. It can be
used to suppress pole disagreement and earth-fault protection trip during the single-phase dead
time interval..
• If TR2P input is high and TR3P input is low (i.e. two-phase trip): The timer for two-phase auto
reclosing dead time is started and the 2PT1 output (two-phase reclosing in progress) is activated.
• If TR3P input is high (i.e. three-phase trip): The timer for three-phase auto reclosing dead time, t1
3Ph or t1 3PhHS, is started depending on if START or STARTHS input has been activated and 3PT1
output (three-phase reclosing shot 1 in progress) is set..
While any of the auto reclosing dead time timers are running, the INPROGR output is activated. 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-pole output trip is set. When
issuing a circuit breaker closing command the tReclaim timer is started. If no tripping takes place during
that time, the auto recloser resets to the "Ready" state and the ACTIVE output resets. If the first reclosing
shot fails, a three-phase trip will be initiated and three-phase reclosing can follow, if selected.
Busbar protection REB670
Application manual
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Section 12
Control
M12391-117 v4
M12391-120 v7
M12391-124 v5
M12391-127 v8
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