IEC12000624 V3 EN
Figure 196:
Functional module diagram of breaker monitoring
16.4.7.1
Circuit breaker contact travel time
The circuit breaker contact travel time subfunction calculates the breaker contact travel
time for opening and closing operations. The operation of the breaker contact travel time
measurement is described in
Contact travel
time
calculation
POSCLOSE
POSOPEN
RSTTRVT
Alarm limit
check
BLOCK
BLKALM
TTRVOP
TTRVCL
TRVTOPAL
TRVTCLAL
IEC12000615-2-en.vsd
IEC12000615 V2 EN
Figure 197:
Functional module diagram for circuit breaker contact travel time
Contact travel time calculation
The contact travel time of the breaker is calculated from the time between the state of
change of auxiliary contacts. The opening travel time is measured between the opening of
the
POSCLOSE
and closing of the
POSOPEN
auxiliary contacts. Similarly, the closing
travel time is measured between the opening of the
POSOPEN
and closing of the
POSCLOSE
auxiliary contacts. A compensation factor has been added to consider the
time difference between auxiliary contact operation and the actual physical opening of the
breaker main contact.
Section 16
1MRK 511 365-UUS A
Monitoring
530
Phasor measurement unit RES670 2.1 ANSI
Technical manual
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