ABB REC650 - Technical Data

after a set time delay and indicate that maintenance of the circuit breaker is required.
Similarly, if the input signal LVL_LO is high, which indicate oil level in the circuit
breaker is below lockout level, the output signal LVL_LO, will be initiated after a time
delay. The two time delay settings, tLevelAlarm and tLevelLockOut, are included in
order not to initiate any alarm for short sudden changes in the oil level. If the oil level
in the circuit breaker goes below the levels for more than the set time delays the
corresponding signals, LVL_ALM, level below alarm level and LVL_LO, level
below lockout level alarm will be obtained.
The input signal BLK_ALM is used to block the two alarms levels. The input signal
BLOCK is used to block both the alarms and the function.
12.17.7 Technical data
Table 426: SSIMLTechnical data
Function Range or value Accuracy
Timers (0.000-60.000) s ± 0.5% ± 110 ms
12.18 Circuit breaker condition monitoring SSCBR
12.18.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Circuit breaker condition monitoring SSCBR - -
12.18.2 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
Section 12 1MRK 511 287-UEN A
Monitoring
488
Technical manual