Figure 77 - Separation Offset Input; Figure 78 - Opening Operation Timing Diagram; Figure 79 - Arcing Time; Figure 80 - Max Arcing Time Threshold - GE CB Watch 3 User Manual

separation time offset (ts-t1) which we input during the setup. It can be set differently per
pole but is usually the same.
HMI: Settings / Opening
Figure 72 – Separation offset input
Figure 73 – Opening operation timing diagram
Using either of these two methods, the arcing time can be calculated and shown for each
operation:
HMI: Measurements / last opening results
Figure 74 – Arcing time
Arcing time alarm
To receive a warning when the breaker is not interrupting the arc fast enough and the
arcing time is too long, an alarm can be set against a maximum threshold:
HMI: Settings / Opening
Figure 75 – Max arcing time threshold
CB Watch 3 User Manual v6.3 - May 2019 Page 51 of 100