Operation Principle; Technical Data; Circuit Breaker Condition Monitoring Sscbr; Identification - ABB RET650 Technical Manual

1MRK 504 135-UEN A
Name Values (Range)
tTempAlarm
tTempLockOut
tResetLevelAlm
tResetLevelLO
tResetTempLO
tResetTempAlm
14.16.6
14.16.7
14.17
14.17.1
Technical manual
Unit
0.000 - 60.000 s
0.000 - 60.000 s
0.000 - 60.000 s
0.000 - 60.000 s
0.000 - 60.000 s
0.000 - 60.000 s

Operation principle

Insulation liquid monitoring function SSIML 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 levels. The input signal
BLOCK is used to block both the alarms and the function.

Technical data

Table 409: SSIMLTechnical data
Function
Timers

Circuit breaker condition monitoring SSCBR

Identification

Function description
Circuit breaker condition monitoring
Step Default
0.001 0.000
0.001 0.000
0.001 0.000
0.001 0.000
0.001 0.000
0.001 0.000
Range or value
(0.000-60.000) s
IEC 61850
identification
SSCBR
Section 14
Monitoring
Description
Time delay for temperature alarm
Time delay for temperture lockout
Reset time delay for level alarm
Reset time delay for level lockout
Reset time delay for temperture lockout
Reset time delay for temperture alarm
Accuracy
± 0.5% ± 110 ms
IEC 60617 ANSI/IEEE C37.2
identification device number
- -
497