ABB RELION REX640 Technical Manual page 1359

1MRS759142 C
REX640
Technical Manual
comes from the interlocking, and SYNC_OK comes from the synchronism and
energizing check. The input SYNC_ITL_BYP can be used for bypassing this control.
The SYNC_ITL_BYP input can be used to activate CLOSE_ENAD discarding the
ENA_CLOSE and SYNC_OK input states. However, the BLK_CLOSE input always
blocks the CLOSE_ENAD output.
The CB opening (OPEN_ENAD) logic is the same as CB closing logic, except that
SYNC_OK is used only in closing. The SYNC_ITL_BYP input is used in both
CLOSE_ENAD and OPEN_ENAD logics.
GUID-5D17847B-0ED9-4528-BFCB-7F480BB17B7B V1 EN
Figure 720: Enabling and blocking logic for CLOSE_ENAD and OPEN_ENAD
signals
Disconnector control DCXSWI and earthing switch control ESXSWI
Normally, the switch closing is enabled (that is, the CLOSE_ENAD signal is TRUE)
by activating the ENA_CLOSE input. The input ITL_BYPASS can be used for
bypassing this control. The ITL_BYPASS input can be used to activate the
CLOSE_ENAD discarding the ENA_CLOSE input state. However, the BLK_CLOSE
input always blocks the CLOSE_ENAD output.
The CB opening (OPEN_ENAD) logic is identical to CB closing logic. The
ITL_BYPASS input is used in both CLOSE_ENAD and OPEN_ENAD logics.
Section 9
Control functions
1353