Maximum Number Of Reclosing Shots - ABB REC670 Applications Manual

Section 14
Control
14.2.2.7
14.2.2.8
14.2.2.9
330

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.
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.
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.
1MRK 511 401-UUS A
M12391-120 v7
M12391-124 v5
M12391-127 v8
Bay control REC670 2.2 ANSI
Application manual