IEC12000624 V3 EN-US
Figure 207:
Functional module diagram of breaker monitoring
16.4.7.1
Circuit breaker contact travel time
GUID-3AF0EE8D-AA8E-4F83-9916-61B5D0D6B05B v12
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 figure
.
Contact travel
time
calculation
POSCLOSE
POSOPEN
RSTTRVT
Alarm limit
check
BLOCK
BLKALM
TTRVOP
TTRVCL
TRVTOPAL
TRVTCLAL
IEC12000615-2-en.vsd
IEC12000615 V2 EN-US
Figure 208:
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 511 408-UUS A
Monitoring
538
Phasor measurement unit RES670 2.2 ANSI
Technical manual
Содержание Relion RES670
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