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 264: SSCBR function block
14.17.4 Signals
Table 428: 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 502 048-UEN A
Monitoring
560
Technical manual
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