ABB 615 series Technical Manual page 966

Section 9
Control functions
960
GUID-AC1D16A3-6BED-4FD4-A5BE-E4079BE5FBB9 V1 EN
Figure 482: Enabling and blocking logic for CLOSE_ENAD and OPEN_ENAD signals
Disconnector control 29DS and grounding switch control 29GS
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.
GUID-5C49E128-422F-4991-A7FE-6FB61B72CFD9 V1 EN
Figure 483: Enabling and blocking logic for CLOSE_ENAD and OPEN_ENAD signals
1MAC059074-MB A
615 series ANSI
Technical Manual