### Overview

The “Interlocking for 1 1/2 CB (BH_CONN, BH_LINE_A, BH_LINE_B)” functions are used for lines connected to a 1 1/2 breaker diameter according to the below Switchyard layout 1 1/2 breaker. Three types of interlocking modules per diameter are defined. BH_LINE_A and BH_LINE_B are the connections from a line to a busbar. BH_CONN is the connection between the two lines of the diameter in the 1 1/2 breaker switchyard layout.

For more detailed information on “Interlocking for 1 1/2 breaker diameter (BH_CONN, BH_LINE_A, BH_LINE_B)” functions, refer to ABB, Relion 670 Series manuals.

To see other supported functions, click here.

#### Functions Identification

Function description | IEC 61850 identification |
IEC 60617 identification |
ANSI/IEEE C37.2 device number |

Interlocking for 1 1/2 breaker diameter | BH_CONN | – | 3 |

Interlocking for 1 1/2 breaker diameter | BH_LINE_A | – | 3 |

Interlocking for 1 1/2 breaker diameter | BH_LINE_B | – | 3 |

### Signals

#### BH_LINE_A function block

#### BH_LINE_A Input signals

BH_LINE_A Input signals | |||

Name | Type | Default | Description |

QA1_OP | BOOLEAN | 0 | QA1 is in open position |

QA1_CL | BOOLEAN | 0 | QA1 is in closed position |

QB6_OP | BOOLEAN | 0 | QB6 is in open position |

QB6_CL | BOOLEAN | 0 | QB6 is in close position |

QB1_OP | BOOLEAN | 0 | QB1 is in open position |

QB1_CL | BOOLEAN | 0 | QB1 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 |

QC3_OP | BOOLEAN | 0 | QC3 is in open position |

QC3_CL | BOOLEAN | 0 | QC3 is in closed position |

QB9_OP | BOOLEAN | 0 | QB9 is in open position |

QB9_CL | BOOLEAN | 0 | QB9 is in closed position |

QC9_OP | BOOLEAN | 0 | QC9 is in open position |

QC9_CL | BOOLEAN | 0 | QC9 is in closed position |

CQA1_OP | BOOLEAN | 0 | QA1 in module BH_CONN is in open position |

CQA1_CL | BOOLEAN | 0 | QA1 in module BH_CONN is in closed position |

CQB61_OP | BOOLEAN | 0 | QB61 in module BH_CONN is in open position |

CQB61_CL | BOOLEAN | 0 | QB61 in module BH_CONN is in closed position |

CQC1_OP | BOOLEAN | 0 | QC1 in module BH_CONN is in open position |

CQC1_CL | BOOLEAN | 0 | QC1 in module BH_CONN is in closed position |

CQC2_OP | BOOLEAN | 0 | QC2 in module BH_CONN is in open position |

CQC2_CL | BOOLEAN | 0 | QC2 in module BH_CONN 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 |

VOLT_OFF | BOOLEAN | 0 | There is no voltage on line and not VT (fuse) failure |

VOLT_ON | BOOLEAN | 0 | There is voltage on the line or there is a VT (fuse) failure |

EXDU_ES | BOOLEAN | 0 | No transm error from bay containing earthing switch QC11 |

QB6_EX1 | BOOLEAN | 0 | External condition for apparatus QB6 |

QB6_EX2 | BOOLEAN | 0 | External condition for apparatus QB6 |

QB1_EX1 | BOOLEAN | 0 | External condition for apparatus QB1 |

QB1_EX2 | BOOLEAN | 0 | External condition for apparatus QB1 |

QB9_EX1 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX2 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX3 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX4 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX5 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX6 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX7 | BOOLEAN | 0 | External condition for apparatus QB9 |

#### BH_LINE_A Output signals

BH_LINE_A Output signals | |||

Name | Type | Description | |

QA1CLREL | BOOLEAN | Closing of QA1 is allowed | |

QA1CLITL | BOOLEAN | Closing of QA1 is forbidden | |

QB6REL | BOOLEAN | Switching of QB6 is allowed | |

QB6ITL | BOOLEAN | Switching of QB6 is forbidden | |

QB1REL | BOOLEAN | Switching of QB1 is allowed | |

QB1ITL | BOOLEAN | Switching of QB1 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 | |

QC3REL | BOOLEAN | Switching of QC3 is allowed | |

QC3ITL | BOOLEAN | Switching of QC3 is forbidden | |

QB9REL | BOOLEAN | Switching of QB9 is allowed | |

QB9ITL | BOOLEAN | Switching of QB9 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 | |

VPQB1TR | BOOLEAN | Switch status of QB1 is valid (open or closed) | |

#### BH_LINE_B function block

#### BH_LINE_B Input signals

BH_LINE_B Input signals | |||

Name | Type | Default | Description |

QA1_OP | BOOLEAN | 0 | QA1 is in open position |

QA1_CL | BOOLEAN | 0 | QA1 is in closed position |

QB6_OP | BOOLEAN | 0 | QB6 is in open position |

QB6_CL | BOOLEAN | 0 | QB6 is in close position |

QB2_OP | BOOLEAN | 0 | QB2 is in open position |

QB2_CL | BOOLEAN | 0 | QB2 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 |

QC3_OP | BOOLEAN | 0 | QC3 is in open position |

QC3_CL | BOOLEAN | 0 | QC3 is in closed position |

QB9_OP | BOOLEAN | 0 | QB9 is in open position |

QB9_CL | BOOLEAN | 0 | QB9 is in closed position |

QC9_OP | BOOLEAN | 0 | QC9 is in open position |

QC9_CL | BOOLEAN | 0 | QC9 is in closed position |

CQA1_OP | BOOLEAN | 0 | QA1 in module BH_CONN is in open position |

CQA1_CL | BOOLEAN | 0 | QA1 in module BH_CONN is in closed position |

CQB62_OP | BOOLEAN | 0 | QB62 in module BH_CONN is in open position |

CQB62_CL | BOOLEAN | 0 | QB62 in module BH_CONN is in closed position |

CQC1_OP | BOOLEAN | 0 | QC1 in module BH_CONN is in open position |

CQC1_CL | BOOLEAN | 0 | QC1 in module BH_CONN is in closed position |

CQC2_OP | BOOLEAN | 0 | QC2 in module BH_CONN is in open position |

CQC2_CL | BOOLEAN | 0 | QC2 in module BH_CONN 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 |

VOLT_OFF | BOOLEAN | 0 | There is no voltage on line and not VT (fuse) failure |

VOLT_ON | BOOLEAN | 0 | There is voltage on the line or there is a VT (fuse) failure |

EXDU_ES | BOOLEAN | 0 | No transm error from bay containing earthing switch QC21 |

QB6_EX1 | BOOLEAN | 0 | External condition for apparatus QB6 |

QB6_EX2 | BOOLEAN | 0 | External condition for apparatus QB6 |

QB2_EX1 | BOOLEAN | 0 | External condition for apparatus QB2 |

QB2_EX2 | BOOLEAN | 0 | External condition for apparatus QB2 |

QB9_EX1 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX2 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX3 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX4 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX5 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX6 | BOOLEAN | 0 | External condition for apparatus QB9 |

QB9_EX7 | BOOLEAN | 0 | External condition for apparatus QB9 |

#### BH_LINE_B Output signals

BH_LINE_B Output signals | |||

Name | Type | Description | |

QA1CLREL | BOOLEAN | Closing of QA1 is allowed | |

QA1CLITL | BOOLEAN | Closing of QA1 is forbidden | |

QB6REL | BOOLEAN | Switching of QB6 is allowed | |

QB6ITL | BOOLEAN | Switching of QB6 is forbidden | |

QB2REL | BOOLEAN | Switching of QB2 is allowed | |

QB2ITL | BOOLEAN | Switching of QB2 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 | |

QC3REL | BOOLEAN | Switching of QC3 is allowed | |

QC3ITL | BOOLEAN | Switching of QC3 is forbidden | |

QB9REL | BOOLEAN | Switching of QB9 is allowed | |

QB9ITL | BOOLEAN | Switching of QB9 is forbidden | |

QC9REL | BOOLEAN | Switching of QC9 is allowed | |

QC9ITL | BOOLEAN | Switching of QC9 is forbidden | |

QB2OPTR | BOOLEAN | QB2 is in open position | |

QB2CLTR | BOOLEAN | QB2 is in closed position | |

VPQB2TR | BOOLEAN | Switch status of QB2 is valid (open or closed) | |

#### BH_CONN function block

#### BH_CONN Input signals

BH_CONN Input signals | |||

Name | Type | Default | Description |

QA1_OP | BOOLEAN | 0 | QA1 is in open position |

QA1_CL | BOOLEAN | 0 | QA1 is in closed position |

QB61_OP | BOOLEAN | 0 | QB61 is in open position |

QB61_CL | BOOLEAN | 0 | QB61 is in closed position |

QB62_OP | BOOLEAN | 0 | QB62 is in open position |

QB62_CL | BOOLEAN | 0 | QB62 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 |

1QC3_OP | BOOLEAN | 0 | QC3 on line 1 is in open position |

1QC3_CL | BOOLEAN | 0 | QC3 on line 1 is in closed position |

2QC3_OP | BOOLEAN | 0 | QC3 on line 2 is in open position |

2QC3_CL | BOOLEAN | 0 | QC3 on line 2 is in closed position |

QB61_EX1 | BOOLEAN | 0 | External condition for apparatus QB61 |

QB61_EX2 | BOOLEAN | 0 | External condition for apparatus QB61 |

QB62_EX1 | BOOLEAN | 0 | External condition for apparatus QB62 |

QB62_EX2 | BOOLEAN | 0 | External condition for apparatus QB62 |

#### BH_CONN Output signals

BH_CONN Output signals | |||

Name | Type | Description | |

QA1CLREL | BOOLEAN | Closing of QA1 is allowed | |

QA1CLITL | BOOLEAN | Closing of QA1 is forbidden | |

QB61REL | BOOLEAN | Switching of QB61 is allowed | |

QB61ITL | BOOLEAN | Switching of QB61 is forbidden | |

QB62REL | BOOLEAN | Switching of QB62 is allowed | |

QB62ITL | BOOLEAN | Switching of QB62 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 | |