Overview
The “Interlocking for line bay (ABC_LINE)” function is used for a line connected to a double busbar arrangement with a transfer busbar according to the below Switchyard layout. The function can also be used for a double busbar arrangement without transfer busbar or a single busbar arrangement with/without transfer busbar.

For more detailed information on “Interlocking for line bay (ABC_LINE)” function, refer to ABB, Relion 670 Series manuals.
To see other supported functions, click here.
Function Identification
| Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |
| Interlocking for line bay | ABC_LINE | – | 3 |
Signals
ABC_LINE function block

ABC_LINE Input signals
| ABC_LINE Input signals | |||
| Name | Type | Default | Description |
| QA1_OP | BOOLEAN | 0 | QA1 is in open position |
| QA1_CL | BOOLEAN | 0 | QA1 is in closed position |
| QB9_OP | BOOLEAN | 0 | QB9 is in open position |
| QB9_CL | BOOLEAN | 0 | QB9 is in closed position |
| QB1_OP | BOOLEAN | 0 | QB1 is in open position |
| QB1_CL | BOOLEAN | 0 | QB1 is in closed position |
| QB2_OP | BOOLEAN | 0 | QB2 is in open position |
| QB2_CL | BOOLEAN | 0 | QB2 is in closed position |
| QB7_OP | BOOLEAN | 0 | QB7 is in open position |
| QB7_CL | BOOLEAN | 0 | QB7 is in closed position |
| QC1_OP | BOOLEAN | 0 | QC1 is in open position |
| QC1_CL | BOOLEAN | 0 | QC1 is in closed position |
| QC2_OP | BOOLEAN | 0 | QC2 is in open position |
| QC2_CL | BOOLEAN | 0 | QC2 is in closed position |
| QC9_OP | BOOLEAN | 0 | QC9 is in open position |
| QC9_CL | BOOLEAN | 0 | QC9 is in closed position |
| QC11_OP | BOOLEAN | 0 | Earthing switch QC11 on busbar WA1 is in open position |
| QC11_CL | BOOLEAN | 0 | Earthing switch QC11 on busbar WA1 is in closed position |
| QC21_OP | BOOLEAN | 0 | Earthing switch QC21 on busbar WA2 is in open position |
| QC21_CL | BOOLEAN | 0 | Earthing switch QC21 on busbar WA2 is in closed position |
| QC71_OP | BOOLEAN | 0 | Earthing switch QC71 on busbar WA7 is in open position |
| QC71_CL | BOOLEAN | 0 | Earthing switch QC71 on busbar WA7 is in closed position |
| BB7_D_OP | BOOLEAN | 0 | Disconnectors on busbar WA7 except in the own bay are open |
| BC_12_CL | BOOLEAN | 0 | A bus coupler connection exists between busbar WA1 and WA2 |
| BC_17_OP | BOOLEAN | 0 | No bus coupler connection exists between busbar WA1 and WA7 |
| BC_17_CL | BOOLEAN | 0 | A bus coupler connection exists between busbar WA1 and WA7 |
| BC_27_OP | BOOLEAN | 0 | No bus coupler connection exists between busbar WA2 and WA7 |
| BC_27_CL | BOOLEAN | 0 | A bus coupler connection exists between busbar WA2 and WA7 |
| VOLT_OFF | BOOLEAN | 0 | There is no voltage on the line and not VT (fuse) failure |
| VOLT_ON | BOOLEAN | 0 | There is voltage on the line or there is a VT (fuse) failure |
| VP_BB7_D | BOOLEAN | 0 | Switch status of the disconnectors on busbar WA7 are valid |
| VP_BC_12 | BOOLEAN | 0 | Status of the bus coupler app. between WA1 and WA2 are valid |
| VP_BC_17 | BOOLEAN | 0 | Status of the bus coupler app. between WA1 and WA7 are valid |
| VP_BC_27 | BOOLEAN | 0 | Status of the bus coupler app. between WA2 and WA7 are valid |
| EXDU_ES | BOOLEAN | 0 | No transm error from any bay containing earthing switches |
| EXDU_BPB | BOOLEAN | 0 | No transm error from any bay with disconnectors on WA7 |
| EXDU_BC | BOOLEAN | 0 | No transmission error from any bus coupler bay |
| QB9_EX1 | BOOLEAN | 0 | External condition for apparatus QB9 |
| QB9_EX2 | BOOLEAN | 0 | External condition for apparatus QB9 |
| QB1_EX1 | BOOLEAN | 0 | External condition for apparatus QB1 |
| QB1_EX2 | BOOLEAN | 0 | External condition for apparatus QB1 |
| QB1_EX3 | BOOLEAN | 0 | External condition for apparatus QB1 |
| QB2_EX1 | BOOLEAN | 0 | External condition for apparatus QB2 |
| QB2_EX2 | BOOLEAN | 0 | External condition for apparatus QB2 |
| QB2_EX3 | BOOLEAN | 0 | External condition for apparatus QB2 |
| QB7_EX1 | BOOLEAN | 0 | External condition for apparatus QB7 |
| QB7_EX2 | BOOLEAN | 0 | External condition for apparatus QB7 |
| QB7_EX3 | BOOLEAN | 0 | External condition for apparatus QB7 |
| QB7_EX4 | BOOLEAN | 0 | External condition for apparatus QB7 |
ABC_LINE Output signals
| ABC_LINE Output signals | |||
| Name | Type | Description | |
| QA1CLREL | BOOLEAN | Closing of QA1 is allowed | |
| QA1CLITL | BOOLEAN | Closing of QA1 is forbidden | |
| QB9REL | BOOLEAN | Switching of QB9 is allowed | |
| QB9ITL | BOOLEAN | Switching of QB9 is forbidden | |
| QB1REL | BOOLEAN | Switching of QB1 is allowed | |
| QB1ITL | BOOLEAN | Switching of QB1 is forbidden | |
| QB2REL | BOOLEAN | Switching of QB2 is allowed | |
| QB2ITL | BOOLEAN | Switching of QB2 is forbidden | |
| QB7REL | BOOLEAN | Switching of QB7 is allowed | |
| QB7ITL | BOOLEAN | Switching of QB7 is forbidden | |
| QC1REL | BOOLEAN | Switching of QC1 is allowed | |
| QC1ITL | BOOLEAN | Switching of QC1 is forbidden | |
| QC2REL | BOOLEAN | Switching of QC2 is allowed | |
| QC2ITL | BOOLEAN | Switching of QC2 is forbidden | |
| QC9REL | BOOLEAN | Switching of QC9 is allowed | |
| QC9ITL | BOOLEAN | Switching of QC9 is forbidden | |
| QB1OPTR | BOOLEAN | QB1 is in open position | |
| QB1CLTR | BOOLEAN | QB1 is in closed position | |
| QB2OPTR | BOOLEAN | QB2 is in open position | |
| QB2CLTR | BOOLEAN | QB2 is in closed position | |
| QB7OPTR | BOOLEAN | QB7 is in open position | |
| QB7CLTR | BOOLEAN | QB7 is in closed position | |
| QB12OPTR | BOOLEAN | QB1 or QB2 or both are in open position | |
| QB12CLTR | BOOLEAN | QB1 and QB2 are not in open position | |
| VPQB1TR | BOOLEAN | Switch status of QB1 is valid (open or closed) | |
| VPQB2TR | BOOLEAN | Switch status of QB2 is valid (open or closed) | |
| VPQB7TR | BOOLEAN | Switch status of QB7 is valid (open or closed) | |
| VPQB12TR | BOOLEAN | Switch status of QB1 and QB2 are valid (open or closed) | |
Logics & highlights
Logic diagram





