Circuit Breaker Contact Travel Time - ABB RES670 Technical Manual

Section 16
Monitoring
16.4.7.1
538
IEC12000624 V3 EN-US
Figure 207: Functional module diagram of breaker monitoring

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 figure208.
POSCLOSE
POSOPEN
RSTTRVT
BLOCK
BLKALM
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.
Contact travel
time
calculation
Alarm limit
check
1MRK 511 408-UUS A
GUID-3AF0EE8D-AA8E-4F83-9916-61B5D0D6B05B v12
TRVTOPAL
TRVTCLAL
IEC12000615-2-en.vsd
Phasor measurement unit RES670 2.2 ANSI
Technical manual
TTRVOP
TTRVCL