ABB REB670 Series - Page 186

tStartTimeout : When one of the two “Follow Modes” is used, there is a settable timer
tStartTimeout which will block the external START input signal when it times-out. This will
automatically also reset the t1 and t2 timers and consequently prevent any backup trip
command. At the same time the STALARM output from the function will have logical value one.
To reset that condition external
START signal shall be removed. This is done in order to
prevent unwanted operation of the breaker failure function for cases where a permanent
START signal is given by mistake (e.g.due to a fault in the station battery system). Note that
any backup trip command will inhibit running of
tStartTimeout timer.
GUID-845257FF-2774-472A-B982-E9DDD8966988 v1
Table 33: Setting summary for FunctionMode, StartMode, RetripMode and BuTripMode
No. StartMode RetripMode t1 and t2 initiated
with
When t1 has
elapsed, TRRET will
When t2 or t2MPh
has elapsed, TRBU
will be given if
t1 and t2 and t2MPh
will be stopped
(reset) if
FunctionMode = Current
1 LatchedStart Off external START never be given current is above
set level *)
t1 and (t2 or
t2MPh) and 150ms
expires and
current is below
set level *)
2 LatchedStart UseFunction
Mode
external START be given if current
is above set level
of IPh>
current is above
set level *)
t1 and (t2 or
t2MPh) and 150ms
expires and
current is below
set level *)
3 LatchedStart Always external START always be given current is above
set level *)
t1 and (t2 or
t2MPh) and 150ms
expires and
current is below
set level *)
4 FollowStart Off external START never be given current is above
set level *)
external START
disappears
5 FollowStart UseFunction
Mode
external START be given if current
is above set level
of IPh>
current is above
set level *)
external START
disappears
6 FollowStart Always external START be given if external
START is present
current is above
set level *)
external START
disappears
7 FollowStart&
Mode
Off external START
and current
above set level
never be given current is above
set level *) and
external START
present
current is below
set level *) or
external START
disappears
8 FollowStart&
Mode
UseFunction
Mode
external START
and current
above set level
be given if current
is above set level
of IPh> and
external START is
present
current is above
set level *) and
external START
present
current is below
set level *) or
external START
disappears
9 FollowStart&
Mode
Always external START
and current
above set level
be given if external
START is present
current is above
set level *) and
external START
present
current is below
set level *) or
external START
disappears
*) Set level depends on selected BuTripMode, that is, set level can be either IPh> or IN> or both.
Section 7 1MRK 505 370-UEN D
Current protection
180 Busbar protection REB670
Application manual