Operation Principle - ABB REG650 Technical Manual

Section 14
Monitoring
14.15.6
14.15.7
14.16
14.16.1
482

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.
Technical data
Table 360: SSIML(71) Technical data
Function
Alarm, oil level
Oil level lockout
Temperature alarm
Temperature lockout
Timers
Circuit breaker condition monitoring SSCBR
Identification
Function description
Circuit breaker condition monitoring
Range or value
0.00-25.00
0.00-25.00
-40.00-200.00
-40.00-200.00
(0.000-60.000) s
IEC 61850 IEC 60617
identification identification
SSCBR -
1MRK 502 043-UUS B
Accuracy
-
-
-
-
± 0.5% ± 110 ms
ANSI/IEEE C37.2
device number
-
Technical Manual