ABB Relion 611 Series, Technical Manual

Page: 415 / 536

• Str 3 delay shot 1
• Str 3 delay shot 2
• Str 3 delay shot 3
• Str 3 delay shot 4
Time delay settings for the
DEL_INIT_4
signal
• Str 4 delay shot 1
• Str 4 delay shot 2
• Str 4 delay shot 3
• Str 4 delay shot 4
Normally, only two or three reclosing attempts are made. The third and fourth
attempts are used to provide the so-called fast final trip to lockout.
OR
CB_TRIP
CB_POSITION
CB_READY
CB_CLOSE
PHLPTOC
I_A
I_B
START
OPERATE
I_C
BLOCK
ENA_MULT
DARREC
OPEN _CB
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
A070866 V3 EN
Figure 195: Autoreclosing configuration example
Delayed
DEL_INIT_2...4
signals are used only when the autoreclosing shot is
initiated with the start signal of a protection stage. After a start delay, the AR function
opens the circuit breaker and an autoreclosing shot is initiated. When the shot is
initiated with the trip signal of the protection, the protection function trips the circuit
breaker and simultaneously initiates the autoreclosing shot.
If the circuit breaker is manually closed against the fault, that is, if SOTF is used, the
fourth time delay can automatically be taken into use. This is controlled with the
internal logic of the AR function and the
Fourth delay in SOTF parameter.
A typical autoreclose situation is where one autoreclosing shot has been performed
after the fault was detected. There are two types of such cases: operation initiated with
protection start signal and operation initiated with protection trip signal. In both cases,
the autoreclosing sequence is successful: the reclaim time elapses and no new
sequence is started.
1MRS757454 D
Section 8
Control functions
611 series 409
Technical Manual