Firstshot=1Ph + 1*2/3Ph 1-Phase, 2-Phase Or 3-Phase Reclosing In The First Shot - ABB REL650 Applications Manual

1MRK 506 334-UUS A
11.3.2.12
11.3.2.13
11.3.2.14
Application manual
command will be issued and the auto-reclosing will be blocked. No more shots take place!
1*3ph should be understood as "Just one shot at 3-phase reclosing".
FirstShot=1ph + 1*2/3ph 1-phase, 2-phase or 3-phase reclosing in the first
shot
At 1-phase trip, the operation is as described above. If the first reclosing shot fails, a 3-
phase trip will be issued and 3-phase reclosing will follow, if selected. At 3-phase trip, the
operation is similar as above. But, if the first reclosing shot fails, a 3-phase trip will be
issued and the auto-reclosing will be blocked. No more shots take place! "1*3ph"should
be understood as "Just one shot at 3-phase reclosing".
A start of a new reclosing cycle is blocked during the set "reclaim time" after the selected
number of reclosing shots have been made.
Evolving fault
An evolving fault starts as a single-phase fault which leads to single-pole tripping and then
the fault spreads to another pole. The second fault is then cleared by three-pole tripping.
The Auto-Reclosing function will first receive a trip and start signal (START) without any
three-phase signal (TR3P). The Auto-Reclosing function will start a single-phase
reclosing, if programmed to do so. At the evolving fault clearance there will be a new
signal PICKUP and three-pole trip information, TR3P. The single-phase reclosing
sequence will then be stopped, and instead the timer, t1 3Ph, for three-phase reclosing will
be started from zero. The sequence will continue as a three-phase reclosing sequence, if
it is a selected alternative reclosing mode.
The second fault which can be single phase is tripped three phase because trip module
(TR) in the IED has an evolving fault timer which ensures that second fault is always
tripped three phase. For other types of relays where the relays do not include this function
the output PREP3PH is used to prepare the other sub-system for three pole tripping. This
signal will, for evolving fault situations be activated a short time after the first trip has reset
and will thus ensure that new trips will be three phase.
Reclosing reset timer
The reset timer tReset defines the time it takes from issue of the reclosing command, until
the reclosing function resets. Should a new trip occur during this time, it is treated as a
continuation of the first fault. The reclaim timer is started when the CB closing command
is given.
Section 11
Control
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