ABB RELION REX640 Technical Manual page 1513

1MRS759142 C
REX640
Technical Manual
setting has three parameter values: "On", "External Ctl" and "Off". The setting value
"On" enables the reclosing operation and "Off" disables it. When the setting value
"External Ctl" is selected, the reclosing operation is controlled with the RECL_ON
input. AR_ON is activated when reclosing operation is enabled.
The operation of DARREC can be described using a module diagram. All the modules
in the diagram are explained in the next sections.
INIT_1
INIT_2
INIT_3
Signal
INIT_4
collection
INIT_5 and delay
logic
INIT_6
DEL_INIT_2
DEL_INIT_3
DEL_INIT_4
RECL_ON
INC_SHOTP
CB_POS
CB_READY
SYNC
INHIBIT_RECL
BLK_RECL_T
BLK_RCLM_T
BLK_THERM
GUID-7DE463EC-6E77-4B23-AA61-E7DD44B37CD2 V1 EN
Figure 789: Functional module diagram
Signal collection and delay logic
When the protection trips, the initiation of autoreclosing shots is in most applications
executed with the INIT_1...6 inputs. The DEL_INIT2...4 inputs are not used.
In some countries, starting the protection stage is also used for the shot initiation. This
is the only time when the DEL_INIT inputs are used.
Shot
initiation
Protection
coordination
controller
Shot
pointer
controller
Sequence
Reclose
controller
controller
Circuit
breaker
controller
Section 9
Control functions
OPEN_CB
INPRO
READY
PROT_CRD
AR_ON
CLOSE_CB
LOCKED
UNSUC_RECL
ACTIVE
CMD_WAIT
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