ABB RELION REX640 Technical Manual page 1359

1MRS759142 F
7 Condition monitoring functions
7.1 Circuit-breaker condition monitoring SSCBR (ANSI
52CM)
7.1.1 Identification
Function description
Circuit-breaker condition monitor-
ing
7.1.2 Function block
Figure 770: Function block
7.1.3 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
when the calculated values exceed the threshold settings.
The function contains a blocking functionality which can be used to block the
function outputs.
7.1.4 Analog input configuration
SSCBR has one analog group input which must be properly configured.
REX640
Technical Manual
Condition monitoring functions
IEC 61850 IEC 60617
identification identification
SSCBR CBCM
y
t values. Alarms are generated
ANSI/IEEE C37.2
device number
52CM
1359