14.17.2
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. The energy is calculated from the
measured input currents as a sum of I
y
t values. Alarms are generated when the
calculated values exceed the threshold settings.
The function contains a block alarm functionality.
The supervised and presented breaker functions include
•
breaker open and close travel time
•
spring charging time
•
number of breaker operations
•
accumulated I
Y
t per phase with alarm and lockout
•
remaining breaker life per phase
•
breaker inactivity
14.17.3
Function block
GUID-365D67A9-BEF8-4351-A828-ED650D5A2CAD V1 EN
Figure 215:
SSCBR function block
14.17.4
Signals
Table 410:
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
Table continues on next page
Section 14
1MRK 504 135-UEN A
Monitoring
498
Technical manual
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