Overview
In Direct transfer trip (DTT) scheme, the received CR signal gives the trip to the circuit breaker after checking certain local criteria functions in order to increase the security of the overall tripping functionality. The “Carrier receive logic” function gives final trip output of the DTT scheme.
For more detailed information on “Carrier receive logic” 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 |
| Carrier receive logic | LCCRPTRC | – | 94 |
Signals & Setting Parameters
LCCRPTRC function block
LCCRPTRC Input signals
| LCCRPTRC Input signals | |||
| Name | Type | Default | Description |
| BLOCK | BOOLEAN | 0 | Block of function |
| LOCTR | BOOLEAN | 0 | Local common trip signal coming from DTT |
| LOCTRL1 | BOOLEAN | 0 | Local trip signal for phase 1 coming from DTT |
| LOCTRL2 | BOOLEAN | 0 | Local trip signal for phase 2 coming from DTT |
| LOCTRL3 | BOOLEAN | 0 | Local trip signal for phase 3 coming from DTT |
| CHERR1 | BOOLEAN | 0 | Channel error indication flag for carrier receive 1 |
| CHERR2 | BOOLEAN | 0 | Channel error indication flag for carrier receive 2 |
| CR1 | BOOLEAN | 0 | Carrier receive 1 |
| CR2 | BOOLEAN | 0 | Carrier receive 2 |
LCCRPTRC Output signals
| LCCRPTRC Output signals | |||
| Name | Type | Description | |
| TRIP | BOOLEAN | Common trip | |
| TRL1 | BOOLEAN | Trip phase 1 | |
| TRL2 | BOOLEAN | Trip phase 2 | |
| TRL3 | BOOLEAN | Trip phase 3 | |
LCCRPTRC Group settings (basic)
| LCCRPTRC Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off/On |
| ChMode | 2 Out Of 2 1 Out Of 2 |
– | – | 2 Out Of 2 | Setting to select 1/2 or 2/2 mode |
| tOperate | 0.000 – 60.000 | s | 0.001 | 0.100 | Time delay to operate |
Technical Data
LCCRPTRC technical data
