Figure 27 - Operating Time Measurement - GE CB Watch 3 User Manual

Operating times
For each opening operation and for each of the poles, a recording is made of:
- The date and time of the appearance of the open command on the control circuit,
- The "Reaction time" (t1) between the appearance of the open command and the
moment where the circuit breaker leaves the "closed" position and the 52a auxiliary
contact changes status
- The "Operation time" (t2) between the appearance of the open command and the
moment where the circuit breaker arrives in the "open" position and the 52b auxiliary
contact changes status
Similarly, for each closing operation, for each of the phases, a recording is made of:
- The date and time of the appearance of the close command on the control circuit,
- The "Reaction time" (t1) between the appearance of the close command and the
moment where the circuit breaker leaves the "open" position and the 52b auxiliary
contact changes status
- The "Operation time" (t2) between the appearance of the close command and the
moment where the circuit breaker arrives in the "closed" position and the 52a
auxiliary contact changes status
The system can then calculate the "Travel time" (t2-t1) when the circuit breaker moves,
during both opening or closing operations.
The system also calculates the opening contact separation time (ts) which it the "reaction
time" t1 plus the contact separation offset to the 52a contact entered in the setup (time
from 52a to contact separation) – see section 6.3 further on.
CB Watch 3 User Manual
Figure 27 – Operating time measurement
v6.3 - May 2019 Page 21 of 100