15.4
Breaker monitoring SSCBR
15.4.1
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
-
-
15.4.2
Application
GUID-45572680-3A39-4B3C-8639-4E4C5A95AA26 v9
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.
Remaining life of circuit breaker
Every time the breaker operates, the circuit breaker life reduces due to wear. The
wear in a breaker depends on the interrupted current. For breaker maintenance or
replacement at the right time, the remaining life of the breaker must be estimated.
The remaining life of a breaker can be estimated using the maintenance curve
provided by the circuit breaker manufacturer.
Circuit breaker manufacturers provide the number of make-break operations
possible at various interrupted currents. An example is shown in figure
.
1MRK 506 375-UEN A
Section 15
Monitoring
Railway application RER670 2.2 IEC
391
Application manual
Summary of Contents for RELION RER670
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