Overview
The “Breaker failure protection (CCRBRF)” function ensures a fast backup tripping of the surrounding breakers in case the own breaker fails to open. CCRBRF measurement criterion can be current based, CB position based or an adaptive combination of these two conditions.
For more detailed information on “Breaker failure protection (CCRBRF)” 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 |
| Breaker failure protection, 3-phase activation and output | CCRBRF | 3I>BF | 50BF |
Signals & Setting Parameters
CCRBRF function block
CCRBRF Input signals
| CCRBRF Input signals | |||
| Name | Type | Default | Description |
| I3P | GROUP SIGNAL | – | Three phase group signal for current inputs |
| BLOCK | BOOLEAN | 0 | Block of function |
| START | BOOLEAN | 0 | Three phase start for breaker failure protection function |
| STL1 | BOOLEAN | 0 | Start signal for phase L1 |
| STL2 | BOOLEAN | 0 | Start signal for phase L2 |
| STL3 | BOOLEAN | 0 | Start signal for phase L3 |
| CBCLDL1 | BOOLEAN | 0 | Circuit breaker closed in phase L1 |
| CBCLDL2 | BOOLEAN | 0 | Circuit breaker closed in phase L2 |
| CBCLDL3 | BOOLEAN | 0 | Circuit breaker closed in phase L3 |
| CBFLT | BOOLEAN | 0 | CB faulty, unable to trip. Backup trip instantaneously |
CCRBRF Output signals
| CCRBRF Output signals | |||
| Name | Type | Description | |
| TRBU | BOOLEAN | Backup trip by breaker failure protection function | |
| TRBU2 | BOOLEAN | Second backup trip by breaker failure protection function | |
| TRRET | BOOLEAN | Retrip by breaker failure protection function | |
| TRRETL1 | BOOLEAN | Retrip by breaker failure protection function phase L1 | |
| TRRETL2 | BOOLEAN | Retrip by breaker failure protection function phase L2 | |
| TRRETL3 | BOOLEAN | Retrip by breaker failure protection function phase L3 | |
| CBALARM | BOOLEAN | Alarm for faulty circuit breaker | |
| STALARM | BOOLEAN | External start signal timed out, when by setting StartMode the external start signal is followed (i.e. when is NOT Latched) | |
CCRBRF Non group settings (basic)
| CCRBRF Non group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| GlobalBaseSel | 1 – 12 | – | 1 | 1 | Selection of one of the Global Base Value groups |
CCRBRF Group settings (basic)
| CCRBRF Group settings (basic) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| Operation | Off On |
– | – | Off | Operation Off / On |
| FunctionMode | Current CB Pos Current or CB Pos |
– | – | Current | Selection of measurement principle: Current / CB Position / Current or CB Position |
| StartMode | LatchedStart FollowStart FollowStart&Mode |
– | – | LatchedStart | Select how t1 and t2 timers are run: By external start signals which is internally latched / Follow the external start signal only / Follow external start signal and selected FunctionMode |
| tStartTimeout | 0.5 – 600.0 | s | 0.1 | 1.0 | Time delay after which the external start signal will be ignored, when by setting StartMode the external start signal is followed (i.e. when is NOT Latched) |
| BuTripMode | 2 out of 4 1 out of 3 1 out of 4 |
– | – | 1 out of 3 | Select backup trip mode when t2 timer expires and current measurement is used: 2 elements operate out of three phases and neutral / 1 element operates out of three phases / 1 element operates out of three phases and neutral |
| RetripMode | Off UseFunctionMode Always |
– | – | Off | Select retrip mode when t1 timer expires: Off / use FunctionMode to check / always without any check |
| IPh> | 5 – 200 | %IB | 1 | 10 | Operate phase current level in % of IBase |
| IN> | 2 – 200 | %IB | 1 | 10 | Operate residual current level in % of IBase |
| t1 | 0.000 – 60.000 | s | 0.001 | 0.000 | Time delay of retrip |
| t2 | 0.000 – 60.000 | s | 0.001 | 0.150 | Time delay of backup trip |
| t2MPh | 0.000 – 60.000 | s | 0.001 | 0.150 | Time delay of backup trip at multi- phase start. It can be used to speed up backup trip command for multi- phase faults on OHLs |
| tPulse | 0.010 – 60.000 | s | 0.001 | 0.200 | Minimum trip pulse duration |
CCRBRF Group settings (advanced)
| CCRBRF Group settings (advanced) | |||||
| Name | Values (Range) | Unit | Step | Default | Description |
| I>BlkCBPos | 5 – 200 | %IB | 1 | 20 | I> in % of IBase to block operation based on CB Position when FunctionMode=Current or CB Pos |
| t3 | 0.000 – 60.000 | s | 0.001 | 0.030 | Additional time delay which is added to t2. It can be used as a second backup trip |
| tCBAlarm | 0.000 – 60.000 | s | 0.001 | 5.000 | Time delay for alarm when faulty circuit breaker indicated |
CCRBRF Monitored data
| CCRBRF Monitored data | ||||
| Name | Type | Values (Range) | Unit | Description |
| IL1 | REAL | – | A | Measured current in phase L1 |
| IL2 | REAL | – | A | Measured current in phase L2 |
| IL3 | REAL | – | A | Measured current in phase L3 |
| IN | REAL | – | A | Measured residual current |
Logics & highlights
Simplified overall logic for LatchedStart
Simplified overall logic for FollowStart
Simplified overall logic for FollowStart&Mode
Start logic for all three Function Modes of operation
Reset logic in latched mode
Simplified retrip logic
Simplified backup trip logic
