ABB REB670 Series, Applications Manual

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LevelLOLimit: This is used to set the limit for a level lockout condition in the oil insulated
device.
TempAlarmLimit: This is used to set the limit for a temperature alarm condition in the oil
insulated device.
TempLOLimit: This is used to set the limit for a temperature lockout condition in the oil
insulated device.
tLevelAlarm: This is used to set the time delay for a level alarm indication, given in s.
tLevelLockOut: This is used to set the time delay for a level lockout indication, given in s.
tTempAlarm: This is used to set the time delay for a temperature alarm indication, given in s.
tTempLockOut: This is used to set the time delay for a temperature lockout indication, given in
s.
tResetLevelAlm: This is used for the level alarm indication to reset after a set time delay in s.
tResetLevelLO: This is used for the level lockout indication to reset after a set time delay in s.
tResetTempLO: This is used for the temperature lockout indication to reset after a set time
delay in s.
tResetTempAlm: This is used for the temperature alarm indication to reset after a set time
delay in s.
14.4 Breaker monitoring SSCBR
14.4.1 Identification
GUID-0FC081B2-0BC8-4EB8-9529-B941E51F18EE v7
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Breaker monitoring SSCBR - -
14.4.2 Application
GUID-45572680-3A39-4B3C-8639-4E4C5A95AA26 v10
The circuit breaker maintenance is usually based on regular time intervals or the number of
operations performed. This has some disadvantages because there could be a number of
abnormal operations or few operations with high-level currents within the predetermined
maintenance interval. Hence, condition-based maintenance scheduling is an optimum solution
in assessing the condition of circuit breakers.
Circuit breaker contact travel time
Auxiliary contacts provide information about the mechanical operation, opening time and
closing time of a breaker. Detecting an excessive traveling time is essential to indicate the
need for maintenance of the circuit breaker mechanism. The excessive travel time can be due
to problems in the driving mechanism or failures of the contacts.
Circuit breaker status
Monitoring the breaker status ensures proper functioning of the features within the
protection relay such as breaker control, breaker failure and autoreclosing. The breaker status
is monitored using breaker auxiliary contacts. The breaker status is indicated by the binary
outputs. These signals indicate whether the circuit breaker is in an open, closed or error state.
1MRK 505 370-UEN D Section 14
Monitoring
Busbar protection REB670 365
Application manual