SIP_50BF_CBF
SIPROTEC-shaped breaker-failure protection (ANSI 50BF): a current-based failure criterion with an optional 52a contact criterion, a two-stage timer giving re-trip then bus strip, and a sealed-in bus trip.
When to use it
Use SIP_50BF_CBF when a breaker's trip has to be proved, and the surrounding breakers tripped if it is not — a busbar-connected feeder, a transformer or generator breaker, any circuit where a failed breaker leaves a fault fed from the bus.
Interface
The published port signature. This is the whole of what the block exposes to your program — the implementation body is not shown here and ships with the download.
Inputs
| Port | Type | Unit |
|---|---|---|
| Ia | REAL | x In |
| Ib | REAL | x In |
| Ic | REAL | x In |
| cb52a | BOOL | — |
| tBF | TIME | — |
| START | BOOL | — |
| ENABLE | BOOL | — |
| CT_OK | BOOL | — |
| Iset | REAL | x In |
| tRetrip | TIME | — |
| USE_52A | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| busTrip | BOOL | — |
| reTrip | BOOL | — |
| Imax | REAL | x In |
| CURRENT_FLOW | BOOL | — |
| BF_TIMING | BOOL | — |
| BLOCKED | BOOL | — |
| ALM_CT_FAIL | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 12
- Simulated scans
- 440
- Simulator
- v0.1.0
Complete IEC 61131-3 implementation with a published test suite that runs on the vplant simulator. The counts above are that suite, executed on this build.
- Conforms to IEC 61131-3
- Conforms to IEC 61499
Download SIP_50BF_CBF — free
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