Table of Contents

Siemens / Circuit breaker failure protection (ANSI 50BF) _ Setting & highlights _ SI5062

Table of Contents

Overview

The “Circuit breaker failure protection” function monitors the tripping of the associated circuit breaker (CB) and generates a backup trip signal if the circuit-breaker fails.
Starting with version V7.50, the previous function CB failure has been replaced with the new Circuit-breaker failure protection with an adaptive algorithm Adaptive CB failure protection. In this way, you achieve a faster, more reliable detection of the opening of the circuit breaker in the event of complex signal histories.

For more detailed information on “Circuit breaker failure protection” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.

To see other supported functions, click here.


Structure/Embedding of the Function

Structure/Embedding of the Circuit breaker failure protection Function

Function Logic Overview

Function Logic Overview

Setting Parameters


Setting parameters for Circuit breaker failure protection

Addr. Parameter C Setting Options Default Setting
50BF Ad.CBF #
_:1 50BF Ad.CBF #:Mode   off
on
test
on
_:105 50BF Ad.CBF #:Holding int. start signal   no
yes
yes
_:107 50BF Ad.CBF #:Start via binary input   no
2 channel
1 channel
no
_:106 50BF Ad.CBF #:Holding ext. start signal   no
yes
no
_:111 50BF Ad.CBF #:Sup.time
f. release signal
  0.00 s to 1.00 s 0.06 s
_:103 50BF Ad.CBF #:CB
aux.cont. crit. allowed
  no
w. ‘CB pos. closed 3p.’
no
_:104 50BF Ad.CBF #:Dropout   with effective criterion
w. aux.c. and curr.crit.
with effective criterion
_:108 50BF Ad.CBF #:Retrip after T1   no
start T2 after T1
parallel start T2, T1
no
_:102 50BF Ad.CBF #:Threshold phase current 1 A @ 100 Irated 0.030 A to 35.000 A 0.500 A
5 A @ 100 Irated 0.15 A to 175.00 A 2.50 A
1 A @ 1.6 Irated 0.001 A to 1.600 A 0.500 A
5 A @ 1.6 Irated 0.005 A to 8.000 A 2.500 A
_:101 50BF Ad.CBF #:Threshold sensitive 1 A @ 100 Irated 0.030 A to 35.000 A 0.250 A
5 A @ 100 Irated 0.15 A to 175.00 A 1.25 A
1 A @ 1.6 Irated 0.001 A to 1.600 A 0.250 A
5 A @ 1.6 Irated 0.005 A to 8.000 A 1.250 A
_:109 50BF Ad.CBF #:Delay T1
for 3-pole retrip
  0.000 s to 60.000 s 0.050 s
_:110 50BF Ad.CBF #:Delay T2
for 3-pole trip
  0.050 s to 60.000 s 0.130 s
_:112 50BF Ad.CBF #:Minimum operate time   0.00 s to 60.00 s 0.10 s
_:120 50BF Ad.CBF #:3I0 criterion   Direct release
Plausibility check
Plausibility check
_:121 50BF Ad.CBF #:I2 criterion   Direct release
Plausibility check
Plausibility check
_:122 50BF Ad.CBF #:Threshold 3I0 dir. release 1 A @ 100 Irated 0.030 A to 35.000 A 0.250 A
5 A @ 100 Irated 0.15 A to 175.00 A 1.25 A
1 A @ 1.6 Irated 0.001 A to 1.600 A 0.250 A
5 A @ 1.6 Irated 0.005 A to 8.000 A 1.250 A
_:123 50BF Ad.CBF #:Threshold I2 dir. release 1 A @ 100 Irated 0.030 A to 35.000 A 0.250 A
5 A @ 100 Irated 0.15 A to 175.00 A 1.25 A
1 A @ 1.6 Irated 0.001 A to 1.600 A 0.250 A
5 A @ 1.6 Irated 0.005 A to 8.000 A 1.250 A
_:124 50BF Ad.CBF #:Monit.
time for BI ">Start"
  0.05 s to 60.00 s 15.00 s
_:125 50BF Ad.CBF
#:Monit.tm. f.BI ">Release"
  0.05 s to 60.00 s 15.00 s
_:154 50BF Ad.CBF #:Imme-
diate dropout
  0
1
true
_:155 50BF Ad.CBF #:BI start external latch   0
1
true

Logic Diagrams & highlights


Internal Start of the Circuit-Breaker Failure Protection Function

Internal Start of the Circuit-Breaker Failure Protection Function

Configuration of the External Start of the Circuit-Breaker Failure Protection Function

Configuration of the External Start of the Circuit-Breaker Failure Protection Function

External Start of the Circuit-Breaker Failure Protection Function, Logic

External Start of the Circuit-Breaker Failure Protection Function, Logic

Current-Flow Criterion

Current-Flow Criterion

Circuit-Breaker Auxiliary Contact Criterion

Circuit-Breaker Auxiliary Contact Criterion

Pickup/Dropout of the Circuit-Breaker Failure Protection Function

Pickup/Dropout of the Circuit-Breaker Failure Protection Function

Delay/Tripping of the Circuit-Breaker Failure Protection Function

Delay/Tripping of the Circuit-Breaker Failure Protection Function

Circuit-Breaker Failure Protection with External Start, Tripping Repetition, and 3‑Pole Tripping (T2)

Circuit-Breaker Failure Protection with External Start, Tripping Repetition, and 3-Pole Tripping (T2)

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