12.17.2
Functionality
The circuit breaker condition monitoring function SSCBR is used to monitor different
parameters of the circuit breaker. The breaker requires maintenance when the number
of operations has reached a predefined value. For proper functioning of the circuit
breaker, it is essential to monitor the circuit breaker operation, spring charge
indication, breaker wear, travel time, number of operation cycles and accumulated
energy. The energy is calculated from the measured input currents as a sum of I
^
2 t
values. Alarms are generated when the calculated values exceed the threshold settings.
The function contains a blocking functionality. It is possible to block the function
outputs, if desired.
12.17.3
Function block
ANSI10000281-1-en.vsd
SSCBR
I3P*
BLOCK
BLK_ALM
POSOPEN
POSCLOSE
ALMPRES
LOPRES
SPRCHRGN
SPRCHRGD
CBCNTRST
IACCRST
SPCHTRST
TRVTRST
TRVTOAL
TRVTCAL
SPRCHRAL
OPRALM
OPRLOALM
IACCALM
IACCLOAL
CBLIFEAL
NOOPRALM
PRESALM
PRESLO
CBOPEN
CBINVPOS
52a
ANSI10000281 V1 EN
Figure 127:
SSCBR function block
12.17.4
Signals
Table 264:
SSCBR Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Three phase group signal for current inputs
BLOCK
BOOLEAN
0
Block of function
BLK_ALM
BOOLEAN
0
Block all the alarms
POSOPEN
BOOLEAN
0
Signal for open position of apparatus from I/O
POSCLOSE
BOOLEAN
0
Signal for close position of apparatus from I/O
ALMPRES
BOOLEAN
0
Binary pressure alarm input
LOPRES
BOOLEAN
0
Binary pressure input for lockout indication
Table continues on next page
1MRK 505 277-UUS C
Section 12
Monitoring
319
Technical Manual
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