Long Trip Signal; Maximum Number Of Reclosing Shots; Armode = 3Ph, (Normal Setting For A Three-Phase Shot) - ABB REB670 Applications Manual

Section 12
Control
12.2.2.6
12.2.2.7
12.2.2.8
320
start, the auto reclosing dead time for two-phase or three-phase auto reclosing is used.
There is also a separate time setting facility for three-phase high-speed auto reclosing
without synchrocheck, t1 3PhHS, available for use when required. It is activated by the
RI_HS input.
A time extension delay, tExtended t1, can be added to the dead time delay for the first
shot. It is intended to come into use if the communication channel for permissive line
protection is lost. In a case like this there can be a significant time difference in fault
clearance at the two line ends, where a longer auto reclosing dead time can be useful.
This time extension is controlled by the setting Extended t1 = On and the PLCLOST
input. If this functionality is used the auto recloser start must also be allowed from
distance protection zone 2 time delayed trip. Time extension delay is not possible to
add to the three-phase high-speed auto reclosing dead time, t1 3PhHS.

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.

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.
1MRK 505 370-UUS A
M12391-117 v4
M12391-120 v7
M12391-124 v5
Busbar protection REB670 2.2 ANSI
Application manual