In case there are multiple CBBs allowed for execution, the CBB with the smallest
number is chosen. For example, if CBB2 and CBB4 request an execution, CBB2 is
allowed to execute the shot.
The auto-reclose function can perform up to five auto-reclose shots or cycles.
9.9.6.3 Configuration examples
OR
CB_TR IP
Circuit breaker position
information from binary input
Conditions to verify if circuit breaker
is ready to be reclosed
CB_CLOSE
PHLPTOC
I_A
I_B START
OPERATE
I_C
BLOCK
ENA_M ULT
PHHPTOC
I _A
I _B STAR T
OPERATE
I _C
BLOCK
ENA _MULT
EFLPTOC
Io
BLOCK START
OPERATE
ENA_ MULT
DARREC
OPEN _C B
CLOSE _CB
CMD_WAIT
INPRO
LOCKED
PROT_ CRD
UNSUC_ RECL
DEL_INIT _4
DEL_INIT _3
DEL_INIT _2
INIT _6
INIT _5
INIT _4
INIT _3
INIT _2
INIT _1
SYNC
INC_SHOTP
CB _READY
CB _POS
RECL _ON
INHIBIT _RECL
BLK _RCLM_T
BLK _RECL_T
BLK _THERM
AR_ON
READY
Figure 908: Example connection between protection and autoreclosing functions in
protection relay configuration
It is possible to create several sequences for a configuration.
Autoreclose sequences for overcurrent and non-directional earth-fault protection
applications where high speed and delayed autoreclosings are needed can be as
follows:
Example 1
The sequence is implemented by two shots which have the same reclosing
time for all protection functions, namely I>>, I> and Io>. The initiation of
the shots is done by activating the operating signals of the protection
functions.
1MRS759142 F
Control functions
REX640
Technical Manual
1683
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