Function Block; Signals - ABB RET650 Technical Manual

Section 8
Current protection
8.6.3
8.6.4
180
Contact check criteria can be used where the fault current through the breaker is small.
Breaker failure protection, 3-phase activation and output (CCRBRF) current criteria
can be fulfilled by one or two phase currents the residual current, or one phase current
plus residual current. When those currents exceed the user defined settings, the
function is triggered. These conditions increase the security of the back-up trip
command.
CCRBRF function can be programmed to give a three-phase re-trip of the own breaker
to avoid inadvertent tripping of surrounding breakers.

Function block

CCRBRF
I3P* TRBU
BLOCK TRRET
START
CBCLDL1
CBCLDL2
CBCLDL3
IEC09000272_1_en.vsd
IEC09000272 V1 EN
Figure 78: CCRBRF function block

Signals

Table 97: CCRBRF Input signals
Name Type
I3P GROUP
SIGNAL
BLOCK BOOLEAN
START BOOLEAN
CBCLDL1 BOOLEAN
CBCLDL2 BOOLEAN
CBCLDL3 BOOLEAN
Table 98: CCRBRF Output signals
Name Type
TRBU BOOLEAN
TRRET BOOLEAN
Default Description
- Three phase group signal for current inputs
0 Block of function
0 Three phase start of breaker failure protection
function
1 Circuit breaker closed in phase L1
1 Circuit breaker closed in phase L2
1 Circuit breaker closed in phase L3
Description
Back-up trip by breaker failure protection function
Retrip by breaker failure protection function
1MRK 504 135-UEN A
Technical manual