ABB REB650, Technical Manual

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12.16.6 Operation principle
Insulation liquid monitoring function SSIML (71) is used to monitor oil level in the
circuit breaker. Two binary output signals are used from the circuit breaker to initiate
alarm signals, level below alarm level and level below lockout level. If the input signal
LVL_ALM is high, which indicate that the oil level in the circuit breaker is below
alarm level, the output signal LVL_ALM, level below alarm level, will be initiated
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 and the input signal
BLOCK to block both alarms and the function.
12.16.7 Technical data
Table 263: SSIML(71) Technical data
Function Range or value Accuracy
Alarm, oil level 0.00-25.00 -
Oil level lockout 0.00-25.00 -
Temperature alarm -40.00-200.00 -
Temperature lockout -40.00-200.00 -
Timers (0.000-60.000) s ± 0.5% ± 110 ms
12.17 Circuit breaker condition monitoring SSCBR
12.17.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Circuit breaker condition monitoring SSCBR - -
Section 12
1MRK 505 277-UUS C
Monitoring
318
Technical Manual